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35C - Road Race Engineering

1. ETACS ECU G a 16 C 312 1 6 304 Ll RA 213 4 5 1 O 5 D 10 819 10 11 12 13 14 15 16 tc 2 STOPLIGHT SWITCH N 6 32 MU801491 1 hh TTo p 3 4 eg HIGH MOUNTED amp 1 STOPLIGHT 9 C39 4 F 10 14 s 6 7 8 9 i i i MUBO1683 10 IITETISITQITT118 1920 21 22 112 T JOINT t F 30113 CONNECTOR 4 z 0 38 112 3 4 516 7 819 10 11 12 13 14 15116 2 l3 4 5 6171819110111 1 12 113 1415 16 17 18 19 20 21 22 23 24 z 2 2 LLI Fw LO D ji n amp amp MU80390 D 11 5 S S T zms o s e 7 8 9 T 10 t2 Ts pen 711 8 19 20 2 1 22 LLI l qe 21 ac ccm 1 1 REAR REAR S S COMBINATION COMBINATION LIGHT LIGHT T STOPLIGHT LH STOPLIGHT RH B F 20 F 06 MU801685 MU801685 i 2 3 L 2 3 W9S35M000A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 151 DIAGNOSIS Connectors C 32 C 38 C 39 Connectors D 11 D 14 AC807552 BN T AC807570 AT Connectors C 304 C 312 ETACS ECU AC608152DT and AC807572 BG A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced e
2. FUSIBLE LINK Lu I ir 1 309 L2 ETACS ECU Y IG1 RELAY NEE A 3 HAHU i ajojo fais STEERING WHEEL SENSOR C 211 MUBO1545 1 2 3 4 5 WAH35E003A Connector C 211 Connectors C 309 C 317 m n AC900844BD AC702828AG TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 281 DIAGNOSIS N CAUTION If there is any problem in the CAN bus lines an incor rect diagnostic trouble code may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Trouble code diagnosis P 54C 16 Whenever ECU is replaced ensure that the CAN bus lines are normal When the steering wheel sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 304 OPERATION Steering wheel sensor contains the power supply circuit terminal No 2 for Steering wheel sensor The power is supplied from the ETACS ECU terminal No 5 The power is supplied from the fusible link No 33 through the multi pur pose fuse No 12 When malfunction occurs in Steering wheel sensor power supply the communication with scan tool becomes unavail able PROBABLE CAUSES Damaged wiring harness and connectors Fuse and fusible link malfunction Improper tightening of battery terminal Battery failure Chargin
3. 4 O s5 6 7 8 9 ATT 16 1 71 8r 2921 22 p eo heh IND x Al PINK WHITE RED BLACK O C D 9 LH A 07 RH A 02 LH r 2i RH F 02 9 FRONT WHEEL SPEED SENSOR REAR WHEEL SPEED SENSOR WAS35M000A Connector A 51 Connector C 39 AC802706BD TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 127 Connector D 11 AC807570 AH DIAGNOSIS Connector F 02 AC807572 BF N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting
4. P sIep7I8 ITJHEEEE CHEESE RE E PR LI YELLOW SKY BLUE VIOLET GREEN PINK WHITE N e gt en eo ND e 4 O d 4 s e 7 8 9 9 omia gis remz18119 29 21 22 p eo heh IND x Al PINK WHITE RED BLACK O C D 9 LH A 07 RH A 02 LH r 2i RH F 02 9 FRONT WHEEL SPEED SENSOR REAR WHEEL SPEED SENSOR WAS35M000A Connector A 07 Connector A 51 TSB Revision 35C 108 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are a
5. WHITE RED KA 1 2 3 j4 O 5 6 7 8 9 1011 12 13 14 1516 17 18 19520 WHITE RED OFF a BLACK BLACK AC803038 Connectors C 36 C 45 Connector C 313 di E Junction block d eem AC802706BH AC608152 AW N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Trouble code diagnosis P 54C 9 Whenever ECU is replaced ensure that the CAN bus lines are normal TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 261 DIAGNOSIS OPERATION ETACS ECU terminal No 15 is grounded by pressing ASC OFF switch The ON OFF state of ASC OFF switch is trans ferred from ETACS ECU to ASC ECU via CAN bus line When the ASC OFF switch is pressed for 3 seconds or more the ASC system turns OFF When the ASC OFF switch is pressed and held for 15 sec onds or more ASC turns ON COMMENTS ON TROUBLE SYMPTOM This may be caused by the open and short circuit in the ASC OFF switch circuit PROBABLE CAUSES Damaged wiring harness and connectors ASC OFF switch malfunction Malfunction of ETACS ECU DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C 1 e MB991827 M U T III
6. QAO TEX IN X02 30 209 f R Hx 18 19000102030409060 X08 09 9061 O WAH35M004A Connector A 51 AC802869AC AC802706BG TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 187 DIAGNOSIS A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal Do not drop or shock the G and yaw rate sensor When the G and yaw rate sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 302 When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ABS ECU monitors if the output of G and yaw rate sensor is normal or not DTC SET CONDITIONS This DTC is set if any malfunction below is found When abnormality is detected by the self diagnosis of the lateral G and yaw rate When the output value of the lateral G and yaw rate is not within the standard value range NOTE This DTC may be set when G and yaw rate sensor is put on the turntable turning at high speed PROBABLE CAUSES Wiring ha
7. Check harness MB991997 ASC ECU A 51ASC ECU harness connector AC606869NC DIAGNOSIS STEP 4 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the voltage between terminal No 32 and body ground OK Approximately battery positive voltage Q Is the check result normal YES Go to Step 7 NO GotoStep 5 STEP 5 Fusible link check Check the fusible link No 27 Q Is the check result normal YES The open circuit may be present in the power supply circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 32 and the fusible link No 27 Then go to Step 20 NO Goto Step 6 TSB Revision 35C 270 ACTIVE STABILITY CONTROL SYSTEM ASC Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869HE Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869ND DIAGNOSIS STEP 6 Resistance measurement at A 51 ASC ECU connector 1 Removal the fusible link No 27 2 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure
8. 8 5 1 5 N m 76 x 13 in Ib 11 2 Nm 98 17 in Ib 11 2 Nm a 98 17 in Ib bli 8 5 x 1 5 N m 76 x 13 in Ib AC800398AC Removal steps NOTE The vehicle speed detection encoder is inte 1 Bolt rear wheel speed sensor grated with the rear wheel hub assembly which is and trailing arm assembly non serviceable connection 2 Rear wheel speed sensor connector gt gt A lt lt 3 Rear wheel speed sensor grommet 4 Rear wheel speed sensor TSB Revision i ACTIVE STABILITY CONTROL SYSTEM ASC 35C 31 8 WHEEL SPEED SENSOR INSTALLATION SERVICE POINT gt gt A lt lt REAR WHEEL SPEED SENSOR GROM MET INSTALLATION Install the rear wheel speed sensor grommet to the body panel Rear wheel speed snugly as shown in the figure sensor grommet zm IIIlLIIIfnD JU AAi Rnt u Body panel AC802118AB INSPECTION M1352008400783 WHEEL SPEED SENSOR CURRENT CHECK A CAUTION Do not connect the battery terminals in reverse as the wheel speed sensor may be damaged 1 Connect the circuit tester to the wheel speed sensor using the special tool extra fine probe MB992006 and measure the sensor current as a single unit Standard value 5 9 to 8 4 mA or 11 8 to 16 8 mA 2 If the measurement value is not within the standard value range replace the wheel speed sensor with a new one AC608846 AB TSB Revision ACTIVE STABILITY CONT
9. lt AWD gt Fusible link No 34 Ignition switch IG1 Fusible link No 36 i Relay No 30 ETACS box S 1 ECU SIE driver CAN driver CAN driver C IG1 relay Analog Analog No 8 C Y interface interface 7 5A Q No 2 No 17 9 2 interface Interface Interface 15A 910A d Q e Stop OFF f amp light FS wheel Data link His on Switch a connector LI Rs J C Fusible link CAN2 No 35 TEM T AWC ECU I Electric Propor tioning valve for ACD control TET circuit Pressure sensor 33 Fora Q BRAK pump relay EE 4 8 ON LED driver circuit driver circuit NA on d j LCD BRAKE ABS ectric E ASC OFF ASC FAILURE Rheo pump a stat L ASC ACTIVE Combination meter 7 K PARKING BRAKE J C OFF I SWITCH Fusiblelink Fusible link CANA No 26 No 27 J C CAN3 PE Shift lever Transmission assembly ASC ECU Motor power supply e a Ili ae ASC ECU power supply Solenoid valve power supply Solenoid valve power supply T T NC qe I3 334 143 FTI jl Ir x Y Y Y Y C e C e G and yaw FL FR RL RR rate sensor 5 J Solenoid valve Kj L Wheel speed sensor Hydraulic unit AC809444AC TSB Revision 35C 10 ACTIVE STABILITY CONTROL SYSTEM ASC SERVICE SPECIFICA
10. A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal Do not drop or shock the G and yaw rate sensor When the G and yaw rate sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 302 When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ABS ECU monitors if the output of G and yaw rate sensor is normal or not DTC SET CONDITIONS This DTC is set if any malfunction below is found The output value of lateral G and yaw rate is abnormal When abnormality is detected by comparing the value out put of the lateral G and yaw rate with the one from the steering wheel sensor and wheel speed sensor PROBABLE CAUSES Wiring harness or connector failure for the special CAN bus lines between ASC ECU and the G and yaw rate sensor Improper installation of the G and yaw rate sensor G and yaw rate sensor malfunction Steering wheel sensor malfunction Improperly installed steering wheel sensor Malfunction of wheel speed sensor ASC ECU malfunction External noise interferen
11. PINK WHITE P sIep7I8 ITJHEEEE CHEESE RE E PR LI YELLOW SKY BLUE VIOLET GREEN PINK WHITE N e gt en eo ND e 4 O d 4 s e 7 8 9 9 omia gis remz18119 29 21 22 p eo heh IND x Al PINK WHITE RED BLACK O C D 9 LH A 07 RH A 02 LH r 2i RH F 02 9 FRONT WHEEL SPEED SENSOR REAR WHEEL SPEED SENSOR WAS35M000A Connector A 07 Connector A 51 TSB Revision 35C 54 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the
12. 35C 298 ACTIVE STABILITY CONTROL SYSTEM ASC SPECIAL TOOLS SPECIAL TOOLS Tool number and name Supersession M1355005800219 Application i F S DO NOT US S e MB991911 Ss DO NOT USE cm MB991826 MB991958 MB991958 a MB991824 b MB991827 c MB991910 d MB991911 e MB991914 f MB991825 g MB991826 M U T III sub assembly a Vehicle communication interface V C l M U T III USB cable M U T II main harness A Vehicles with CAN communication system M U T III main harness B Vehicles without CAN communication system M U T III main harness C for Chrysler models only MU T III measurement adapter M U T III trigger harness MB991824 KIT NOTE G MB991826 M U T III Trigger Harness is not necessary when pushing V C l ENTER key A CAUTION M U T Ill main harness A MB991910 should be used M U T Ill main harness B and C should not be used for this vehicle ASC check Diagnostic trouble code display service data display and calibration by scan tool MB991997 MB991997 ASC check harness Voltage inspection at ASC ECU terminals TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 299 ON VEHICLE SERVICE Tool number and Supersession Application name p DO NOT USE MB991223 MB992006 MB991223 a MB991219 b MB991220 c MB991221 d MB991222 Harness set
13. DIAGNOSTIC FUNCTION ASC ECU has the following functions for easier sys tem checks All the following items can be diagnosed using the scan tool DTC set Refer to P 35C 27 CHECK OF FREEZE FRAME DATA The freeze frame data can be checked by using the scan tool it verifies that the malfunction for that code is resolved star tup check 2 The brake warning light does not turn OFF when the parking brake is applied or the brake fluid level is lowered M1352011201522 Service data output Refer to P 35C 291 Actuator test Refer to P 35C 294 Freeze frame data output Refer to P 35C 11 When detecting fault and storing the DTC the ECU connected to CAN bus line obtains the data before the determination of the DTC and the data when the DTC is determined and then stores the ECU status of that time By analyzing each data from scan tool the troubleshooting can be performed more effi ciently The displayed items are as the table below TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 12 DIAGNOSIS Display item list Item name Content Unit Odometer Total driving distance after the DTC is generated mile Ignition cycle Number of times the ignition switch is turned ON or Number of LOCK OFF after the past failure transition counts is displayed Accumulated minute Cumulative time for current malfunction of DTC min Power supply Voltage of power supply when the DTC is
14. encoder 4 Rear hub assembly AC704785AB DIAGNOSIS STEP 13 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 14 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction NO lt Deformation FWD gt Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 Then go to Step 15 NO lt Deformation AWD gt Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 Then go to Step 15 STEP 14 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1049 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 15 NO The procedure is complete STEP 15 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1049 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CON
15. ACTIVE STABILITY CONTROL SYSTEM ASC E ON VEHICLE SERVICE 35C 303 Vehicles without TC SST gt 1 Park the vehicle on a level surface A CAUTION Before connecting or disconnecting the scan tool turn the ignition switch to the LOCK OFF position 2 Set the scan tool with the ignition LOCK OFF 3 Turn the ignition switch to the ON position 4 Select the relevant system from the menu 5 Select ABS ASC ASTC WSS from the system lists in System select and press OK button Select Special function in ABS ASC ASTC WSS Select Sensor calibration in Special function 8 Select G sensor calibration from the selected item and press OK button 9 The screen displays G sensor calibration The selected command will be executed Are you sure Caution Please check the execution conditions Then press OK button 10 Execute The command was executed will be shown Then press OK button 11 Select Lateral G sensor calibration from the selected item and press OK button 12 The screen displays Lateral G sensor calibration The selected command will be executed Are you sure Caution Please check execution conditions Then press OK button 13 Executed The command was executed will be shown Then press OK button 14 Learning neutral point complete 15 Turn the ignition switch to LOCK OFF position and then disconnect the scan tool N O lt Vehicles with TC SST
16. Abnormality in FL RR wheel cut valve system Abnormality in FR RL wheel cut valve system Abnormality in FL RR wheel suction valve system Abnormality in FR RL wheel suction valve system P 35C 133 Faulty valve power supply circuit TSB Revision P 35C 135 35C 28 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS Item Reference page Faulty motor drive circuit Low or high power supply voltage in pump motor P 35C 139 Abnormality in brake fluid pressure sensor circuit P 35C 144 Abnormality in brake fluid pressure sensor output signal P 35C 146 Abnormality in stoplight switch circuit P 35C 150 Prolonged operation of ASC Abnormality in ASC ECU P 35C 158 P 35C 161 Abnormality in battery 18 0 1 0 V or more voltage high voltage P 35C 162 Torque request signal rejection P 35C 164 CAN time out error P 35C 166 2 P 35C 169 2 VIN not recorded Re execution of variant coding Abnormality in G and yaw rate sensor Abnormality in lateral G sensor and yaw rate output value incorrect installation P 35C 172 P 35C 174 P 35C 182 Abnormality in G and yaw rate sensor Abnormality in longitudinal G sensor output voltage P 35C 176 Abnormality in G and yaw rate sensor Abnormality in longitudinal G sensor output signal P 35C 179 Internal abnormality in G and yaw rate sensor P 35C 186 Brake flu
17. ee a LI Sensor vase D FL RL Front left wheel FL Front right wheel RL Acg00338az NOTE Dashed lines indicate the CAN bus line 1 AWD 2 CVT TSB Revision 35C 8 ACTIVE STABILITY CONTROL SYSTEM ASC GENERAL INFORMATION ASC ELECTRICAL DIAGRAM lt FWD gt Fusible link No 34 Ignition switch IG1 Fusible link No 36 Relay No 30 D ECU T IG1 relay CAN driver CAN driver CAN driver Q Analog Analog No 9 interface interface 15A Q No2 interface 15A 310A m aM t ee o L f ae e Data link le g CAN1 connector Stop Steering wheel OFF light sensor ON switch J J C a S as wal 33 d 3 circuit Q c ON BRAKE ircuit Fusiblelink Fusible link TU LCD BRAKE ABS No 26 No 27 m Rheostat J ASC OFF ASC FAILURE CANS l ASC ACTIVE x Combination meter 6 seu ee Bl Tow fi Ecm P A ASC ECU Y Y I i 1 Motor power supply ASC ECU power supply Solenoid valve power supply Solenoid valve power supply Di TE TF TT FT 131i l ry d LI LL 11 V G and yaw rate sensor HLH o Solenoid valve Wheel speed sensor TSB Revision Hydraulic unit AC802971AC ACTIVE STABILITY CONTROL SYSTEM ASC 35C 9 GENERAL INFORMATION
18. 2 Measure the resistance between the wheel speed sensor power supply terminal signal terminal No 43 and the body ground and between the wheel speed sensor ground terminal No 42 and the body ground OK No continuity Q Is the check result normal YES Go to Step 7 NO Not normal at the terminal No 43 or No 42 Go to Step 8 TSB Revision MB991997 A 51 ASC ECU harness connector ACTIVE STABILITY CONTROL SYSTEM ASC 35C 51 Check harness ASC ECU AC606870BO DIAGNOSIS STEP 7 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the ASC ECU side connector and harness side connector and then measure the voltage at the special tool connector side 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 43 and body ground and between the ground terminal No 42 and body ground OK Terminal No 43 and body ground Battery posi tive voltage Terminal No 42 and body ground 1 volt or less Q Is the check result normal YES Go to Step 8 NO Go to Step 10 STEP 8 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 9 NO Replace the wheel speed sensor RR Refer to P 35C 316 Then go to Step 11 STEP 9 Wir
19. ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 109 DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1046 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the DTC Check that the DTC C100A C1011 C1014 or C1041 is also set Q Is the DTC C100A C1011 C1014 or C1041 also set YES Carry out the diagnosis for the relevant DTC and then go to Step 5 NO Goto Step 4 STEP 4 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 tem No 01 FL wheel speed sensor Q Is the check result normal YES Go to Step 14 NO GotoStep 5 STEP 5 Connector check A 51 ASC ECU connector A 07 wheel speed sensor FL connector Q Is the check result normal YES Go to Step 6 NO Repair the defective connector Then go to Step 15 TSB Revision z ACTIVE STABILITY CONTROL SYSTEM ASC 35C 1 10 DIAGNOS
20. Connector A 51 ACTIVE STABILITY CONTROL SYSTEM ASC 35C 227 DIAGNOSIS AC802869AC AC802706BG A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal Do not drop or shock the G and yaw rate sensor When the G and yaw rate sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 302 When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION The G and yaw rate sensor outputs the signal to ASC ECU via the special CAN bus lines DTC SET CONDITIONS This DTC is set when the communication error occurs in the exclusive CAN bus communication between the ASC ECU and the G and yaw rate sensor PROBABLE CAUSES Wiring harness or connector failure for the special CAN bus lines between ASC ECU and the G and yaw rate sensor Malfunction of the G and yaw rate sensor e ASC ECU malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB C
21. OK No continuity Q Is the check result normal YES Replace fuse No 2 Then go to Step 21 NO A short circuit may be present in the wiring harness between C 38 joint connector terminal No 10 and F 06 rear combination light stoplight RH connector terminal No 1 or between C 38 joint connector terminal No 10 and F 20 rear combination light stoplight LH connector terminal No 1 or between C 38 joint connector terminal No 10 and F 10 high mounted stoplight connector terminal No 2 Repair the wiring harness if necessary and then replace fuse No 2 Then go to Step 22 STEP 12 Connector check C 304 ETACS ECU connector Q Is the check result normal YES Go to Step 13 NO Repair the damaged connector STEP 13 Measure the voltage at the C 304 ETACS ECU connector A CAUTION Measure while the brake pedal is not depressed Measure the voltage between terminal No 1 and the body ground by backprobing OK Battery positive voltage Q Is the check result normal YES Go to Step 14 NO Replace the ETACS ECU Refer to GROUP 54A ETACS ECU P 54A 769 Then go to Step 22 STEP 14 Connector check C 32 Stoplight switch connector Q Is the check result normal YES Go to Step 15 NO Repair the damaged connector Then go to Step 22 TSB Revision 35C 156 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS STEP 15 Measure the voltage at C 32 stoplight switch connector 1 Disconnect C 32
22. TSB Revision 35C 48 ACTIVE STABILITY CONTROL SYSTEM ASC Connector D 11 AC807570 AH DIAGNOSIS Connector F 02 AC807572 BF N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS ASC ECU monitors the voltage fluctuation in each wheel speed sensor circuit If ASC ECU detects the open or short circuit in the circuit it will set a DTC PROBABLE CAUSES Cu
23. STEP 6 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 43 and the body ground and between the wheel speed sensor ground terminal No 42 and the body ground OK 1 volt or less Q Is the check result normal YES Go to Step 7 NO Not normal at the terminal No 43 or No 42 Go to Step 9 TSB Revision T ACTIVE STABILITY CONTROL SYSTEM ASC 35C 130 DIAGNOSIS STEP 7 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the resistance between the wheel speed sensor power supply terminal signal terminal No 43 and the body ground and between the wheel speed sensor ground terminal No 42 and the body ground OK No continuity Check harness Q Is the check result normal YES Go to Step 8 M
24. TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 102 DIAGNOSIS DTC SET CONDITIONS ASC ECU monitors the signals from each wheel speed sensor while the vehicle is being driven If any periodical drop is found in these sensor signals ASC ECU will set the relevant DTC PROBABLE CAUSES Wheel bearing malfunction Deformation of the wheel speed detection encoder Missing teeth of the wheel speed detection encoder Adhesion of foreign materials on the wheel speed detection encoder ASC ECU malfunction The number of poles on the Magnetic encoder for wheel speed detection N pole and S pole is changed DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1043 set YES Go to Step 3 NO The procedure is complete STEP 3 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the Rear wheel hub assembly
25. e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnosis table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1049 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the DTC Check that the DTC C102B C1032 C1035 or C1044 is also set Q Is the DTC C102B C1032 C1035 or C1044 also set YES Carry out the diagnosis for the relevant DTC and then go to Step 5 NO Go to Step 4 STEP 4 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 e Item No 04 RR wheel speed sensor Q Is the check result normal YES Go to Step 14 NO Goto Step 5 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 129 Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869DE DIAGNOSIS STEP 5 Connector check A 51 ASC ECU connector C 39 intermediate connector D 11 intermediate connector F 02 wheel speed sensor RR connector Q Is the check result normal YES Go to Step 6 NO Repair the defective connector Then go to Step 15
26. NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 221 DIAGNOSIS DTC U0125 G and yaw rate sensor message time out error message error G and Yaw Rate Sensor Circuit G AND YAW RATE SENSOR C 137 GND I OAS V V V 0007 1 5 2 3 ui Xt eS NOTE E eo ES 1 NON TURBO zd e zi 85 2 TURBO 22 29 18 19 ASC ECU i i yo yes C2X3X4XEXEX IKE ON OX XE 31205 D R o XE 9000 10203009002 080980 L O36 25506 5869406 102032559 WAH35M004A AC802706BG A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal Do not drop or shock the G and yaw rate sensor When the G and yaw rate sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 302 When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 222 DIAGNOSIS OPERATION The G and yaw rate sensor outputs the
27. Q Does the ABS warning light turn ON and OFF normally YES Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 8 STEP 8 Retest the system Q Does the ABS warning light turn ON and OFF normally YES The procedure is complete NO Return to Step 1 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 249 DIAGNOSIS Inspection Procedure 5 Brake warning light does not illuminate when the ignition switch is turned to ON position engine stopped A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Trouble code diagnosis P 54C 9 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION e ASC ECU sends the illumination request signal of the break warning light to the combination meter through ETACS ECU via the CAN communication ASC ECU illuminates brake warning light via ETACS ECU for approximately 3 seconds for bulb check with the ignition switch turned to the ON position COMMENTS ON TROUBLE SY
28. Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C Troubleshooting P 54C 16 Then go to Step 8 STEP 2 Using scan tool MB991958 check the DTC Use scan tool to check the DTC for the ASC system Q Is the DTC set YES Carry out the diagnosis for the DTC Refer to P 35C 27 NO Goto Step 3 STEP 3 Actuator test of combination meter Perform the following actuator test by the combination meter system and check if the ABS warning light illuminates nor mally Refer to GROUP 54A Combination Meter Actuator Test Table P 54A 100 Vehicles without color liquid crystal dis play or P 54A 100 Vehicles with color liquid crystal display gt e Item No 07 Indicator 1 Q Is the check result normal YES Go to Step 4 NO Replace the combination meter Refer to GROUP 54A Combination Meter P 54A 124 Then go to Step 8 STEP 4 Check the ASC ECU power supply circuit system Refer to P 35C 266 Q Is the check result normal YES Go to Step 5 NO Diagnose the power supply circuit of the ASC ECU Refer to P 35C 266 STEP 5 Using scan tool MB991958 check the other system DTC Using scan tool check that DTC U0141 is not set by the combi nation meter system Q Is the DTC set YES Diagnose the combination meter Refer to GROUP 54A Combination Meter Troubleshooting P 54A 55 Then go to Step 8 NO Goto Step 6 TSB Revision ACTIVE STABILITY
29. Q Is the check result normal YES Go to Step 9 NO Goto Step 8 STEP 8 Connector check A 51 ASC ECU connector Q Is the check result normal YES An open circuit may be present in the ground circuit Repair the wiring harness between the A 51 ASC ECU terminal No 16 and body ground and between the A 51 ASC ECU terminal No 47 and body ground NO Repair the defective connector STEP 9 Check whether the DTC is reset 1 Erase the DTC 2 Turn the ignition switch to the LOCK OFF position 3 Turn the ignition switch to the ON position Q Is DTC C1608 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 10 NO Goto Step 11 STEP 10 Check whether the DTC is reset Drive the vehicle at 12mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12mph 20 km h or higher Q Is DTC C1608 set YES Return to Step 1 NO Goto Step 11 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 217 DIAGNOSIS STEP 11 Check the other DTCs Drive the vehicle at 12mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12mph 20 km h or higher Q Is any DTC set YES Carry out the applicable troubleshooting for the DTC Refer to P 35C 27 NO The procedure is complete DTC U0001 Bus off A CAUTION If there is any problem in the CAN bus lines an i
30. TSB Revision S ACTIVE STABILITY CONTROL SYSTEM ASC 35C 266 DIAGNOSIS Inspection Procedure 12 ASC ECU power supply circuit system Solenoid Valve Motor and ASC ECU Power Supply Circuit FUSIBLE FUSIBLE FUSIBLE LINK LINK 6 LINK 4 TENA IGNITION SWITCH C 212 41516 o Du s og fa JAC he fag ae Meal ee v gy ted 2 Lu E LEX D HANU Sa HOH 1 C 309 6 c 317 elebo unas ETACS H ECU Y a LLI i lt z I ac REN 5 mo O RELAN 3 sesso zT z 0 315 4 boy ee 3 4 516 RUNE 7 8 dus id SFE 13 14 151 e r7 re 19 oS z 200 19 0 128 Lu oF z Zr ea a gt 32 1 2 8 Y Y Y ASC ECU A 51 SOLENOID MOTOR POWER SUPPLY GCOCOCOO0COUEL POWER SUPPLY R FUUAIIUSAIIID G T SUPPLY GND GND V V 16 4 5 5 lt lt all E ea ea WAH35M006A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 267 Connector A 51 DIAGNOSIS Connector C 212 Connectors C 309 C 315 C 317 Junction block AC608152 AC A CAUTION When the ASC ECU power supply voltage becomes 9 7 x 0 3 V or less the AB
31. The difference between the neutral position that was input to the ASC ECU before the G and yaw rate sensor calibration and the neutral position after the calibration 0 15 to 0 15 G Ignition switch Ignition switch ON ON Ignition switch input Ignition switch ON ON Vehicle speed Perform a test run of the vehicle TSB Revision The speedometer display and the scan tool display almost agree with each other ACTIVE STABILITY CONTROL SYSTEM ASC Check item DIAGNOSIS Check condition 35C 293 Normal condition Brake pressure sensor The brake pedal is depressed ON The brake pedal is released OFF G sensor offset Yaw rate sensor offset The difference between FWD 0 G Fixed value the neutral positions before the calibration and after the calibration received in the ASC ECU at G amp yaw rate sensor calibration AWD The difference between the neutral position that was input to the ASC ECU before the G and yaw rate sensor calibration and the neutral position after the calibration 0 15 t0 0 15 G Except vehicles with HSA e 0 08 to 0 08 G lt Vehicles with HSA gt 6 0 to 6 0 deg s Power supply voltage inp ut Battery positive voltage 10 to 18 V ASC operatable range Parking brake switch Input When the parking brake lever is pulled up ON When the parking brake lever is r
32. The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS ASC ECU monitors the signals from each wheel speed sensor while the vehicle is being driven If any fault below is found in these sensor signals ASC ECU will set the relevant DTC Irregular change in the wheel speed sensor signal Wheel speed sensor signal continuously indicates high value PROBABLE CAUSES Current trouble Excessive gap between the wheel speed sensor and the wheel speed detection encoder Adhesion of foreign materials on the wheel speed sensor Adhesion of foreign materials on the wheel speed detection encoder TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 69 Wheel bearing malfunction Malfunction of wheel speed sensor Damaged wiring harness and connectors External noise interference Improper installation of the wheel speed sensor Deformation of the wheel speed detection encoder ASC ECU malfunction Disturbance of magnetization pattern for wheel speed detection encoder The number of poles on the Magnetic encoder for wheel speed detection N pole and S pole is changed Past trouble e When DTC C1020 is also set carry out diagnosis with par ticular emphasis on wiring harness and connector failures between ASC ECU and the wheel speed sensor For diag nosis procedures refer to How to treat
33. 08 Approx 3 seconds l AC400780 AB 5 This is indicated as shown in the above 6 When any malfunction has been found take a necessary action according to the Judgment Table TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC ON VEHICLE SERVICE i 35C 301 Judgment Table Display on Operation Test result Judgme Cause Measure scan tool nt 01 FL wheel e Depress the brake Braking force Normal ABS drive pedal to lock the decreases for 3 02 FR wheel wheel seconds from ABS drive e Select the vehicle the lock status ear de jd dicas The wheel Error Clogged brake line Check and i does not lock other than hydraulic clean the brake 04 RR wheel perform the if the unit line ABS drive actuator test Urin l rake pedal is Rotate the selected depressed Clogged hydraulic l Replace the wheel by hands to circuit in the hydraulic hydraulic unit confirm the braking unit assembly force Braking force Faulty routing of Route the does not hydraulic unit brake brake tube decrease tube correctly Malfunction of Replace the hydraulic unit solenoid hydraulic unit valve operation assembly 05 FL wheel Select the vehicle Lock condition Normal TCL drive to be inspected occurs for 3 06 FR wheel using scan tool seconds from TCL drive perform the the status 07 RL wheel actuator test without braking TCL drive e Rotate the selected force 2 pies barat got The wheel Erro
34. If they do not match ASC ECU sets this DTC PROBABLE CAUSES e ETACS ECUS have been interchanged between two vehi cles Malfunction of ETACS ECU Malfunction of ASC ECU External noise interference DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 175 DIAGNOSIS STEP 2 DTC recheck after resetting CAN bus lines Check if DTC U1415 or U1417 is also set Q Is DTC U1415 or U1417 set YES Perform troubleshooting for the diagnostic trouble code that is set Refer to P 35C 27 NO Goto Step 3 STEP 3 Using scan tool MB991958 diagnostic trouble code of other systems Use scan tool to check that the vehicles information related DTC is set by the ETACS ECU Q Is any DTC set YES Troubleshoot the relevant diagnostic trouble code and then go to Step 7 NO Go to Step 4 STEP 4 ETACS ECU coding data check Refer to GROUP 00 Coding List P 00 28 Q Is the check result normal YES Go to Step 6 NO Goto Step 5 S
35. Not present OK lt CVT gt Present ACDAYC OK Not present Q Is the check result normal YES Go to Step 5 NO Replace the ETACS ECU Refer to GROUP 54A ETACS ECU P 54A 769 and then go to Step 6 STEP 5 Check whether the DTC is reset Q Is DTC C1290 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 6 NO Ifthe trouble symptom is resolved an intermittent malfunction such as poorly engaged connector s or wiring harness is suspected Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 6 Check whether the DTC is reset Q Is DTC C1290 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 169 DTC C1290 CAN time out error lt AWD gt N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 If the DTC C1290 is set in ASC ECU always diagnose the CAN bus line If there is any fault in the CAN bus lines an incorrect DTC may be set In this case the set DTC is not highly reliable Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and
36. RL FWD gt Refer to GROUP 27A On vehicle Service P 27A 5 e Check the wheel bearing lt RL AWD gt for looseness Refer to GROUP 27B On vehicle Service P 27B 1 7 Q Is the check result normal YES Go to Step 4 NO FWD Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 NO AWD Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 103 lt FWD gt Ball bearing Magnetic Rear ie 7 encoder Oil seal lt AWD gt Rear wheel bearing 1 Magnetic encoder 4 Rear hub assembly AC704785AB DIAGNOSIS STEP 4 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 5 NO Presence of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction When the encoder is deformed replace the rear hub assembly NO lt Deformation FWD gt Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 NO lt Deformation AWD gt Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 STEP 5 Check whether
37. a Test harness b LED harness c LED harness adaptor d Probe MB992006 Extra fine probe General service tools Continuity check and voltage measurement at harness wire or connector for loose corroded or damaged terminals or terminals pushed back in the connector a Connector pin contact pressure inspection b Power circuit inspection c Power circuit inspection d Commercial tester connection Continuity check and voltage measurement at harness wire or connector for loose corroded or damaged terminals or terminals pushed back in the connector ON VEHICLE SERVICE HYDRAULIC UNIT CHECK M1355006100183 Required Special Tools MB991958 scan tool Sub Assembly e MB991824 Vehicle Communication Interface V C 1 MB991827 scan tool USB Cable MB991910 scan tool Main Harness A Vehicles with CAN communication system 1 Raise the vehicle using a jack and support the specified points with a rigid rack N CAUTION Before connecting or disconnecting scan tool always turn the ignition switch to the LOCK OFF position 2 Before setting scan tool turn the ignition key to the LOCK OFF position 3 Confirm that the selector lever is in the N position and then start the engine 4 When carrying out the actuator tests No 01 to 04 perform the actuator tests using scan tool while depressing the brake pedal When carrying out the actuator tests No 05 to 08 perform the actuator tests using
38. carry out the calibration to make ASC ECU learn the neutral point of the steering wheel sensor G and yaw rate sensor and brake fluid pressure sensor ASC ECU replacement A CAUTION Carry out the calibration under the following con ditions The vehicle has one occupant driver only Turn the steering wheel to set the wheels in the straight ahead positions The brake pedal is not depressed The stop light switch is OFF 1 Park the vehicle on a level surface M1357003900012 A CAUTION Before connecting or disconnecting scan tool always turn the ignition switch to the LOCK OFF position 2 Before setting scan tool turn the ignition key to the LOCK OFF position Turn the ignition switch to the ON position Select ABS ASC ASTC Select Special function Select Sensor calibration Select all sensor calibration Before removing scan tool from the vehicle turn the ignition key to the LOCK OFF position CONDO FW G AND YAW RATE SENSOR CALIBRATION M1355009300175 A CAUTION Before performing calibration check that the G and yaw rate sensor related diagnostic trouble code is not set A CAUTION After the next operation has been completed carry out the calibration to make ASC ECU learn the neutral position of the G and yaw rate sensor G and yaw rate sensor replacement ASC ECU replacement TSB Revision
39. connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the ASC ECU side connector and harness side connector and then measure the voltage at the special tool connector side 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 34 and body ground and between the ground terminal No 33 and body ground OK Terminal No 34 and body ground Battery posi tive voltage Terminal No 33 and body ground 1 volt or less Q Is the check result normal YES Go to Step 9 NO Go to Step 14 STEP 9 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 10 NO Replace the wheel speed sensor FR Refer to P 35C 316 Then go to Step 15 STEP 10 Wiring harness check between A 51 ASC ECU connector terminal No 34 and A 02 wheel speed sensor FR connector terminal No 1 and between A 51 ASC ECU connector terminal No 33 and A 02 wheel speed sensor FR connector terminal No 2 Check for open or short circuit in wheel speed sensor FR circuit Q Is the check result normal YES Go to Step 11 NO Repair the wiring harness Then go to Step 15 STEP 11 Check for wheel speed sensor installation Check how the wheel speed sensor lt FR gt is installed Discon nection of wheel speed sensor loose mounting bolt etc Q Is the
40. driver only in the vehicle Q Is the check result normal YES If a trouble is solved it is determined that there is an intermittent malfunction such as poor engaged connector s or open circuit Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 NO Replace the G and yaw rate sensor Refer to P 35C 320 Then go to Step 13 STEP 13 Retest the system Check if the HSA works with one occupant driver only in the vehicle Q Is the check result normal YES This diagnosis is complete NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 14 STEP 14 Retest the system Check if the HSA works with one occupant driver only in the vehicle Q Is the check result normal YES This diagnosis is complete NO Return to Step 1 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 289 Inspection Procedure 16 HSA Hill Start Assist works on a flat road N CAUTION If there is any problem in the CAN bus lines an incor rect diagnostic trouble code may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostics Table P 54C 16 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35
41. lt FR gt Refer to P 35C 316 Then go to Step 11 STEP 9 Wiring harness check between A 51 ASC ECU connector terminal No 34 and A 02 wheel speed sensor lt FR gt connector terminal No 1 and between A 51 ASC ECU connector terminal No 33 and A 02 wheel speed sensor lt FR gt connector terminal No 2 Check for the open or short circuit in wheel speed sensor FR circuit Q Is the check result normal YES Go to Step 10 NO Repair the wiring harness Then go to Step 11 STEP 10 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1015 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 11 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 11 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1015 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 41 DTC C1020 Abnormality in RL wheel speed sensor circuit Wheel Speed Sensor Circuit PIN
42. north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS ASC ECU monitors the signals from each wheel speed sensor while the vehicle is being driven If any fault below is found in these sensor signals ASC ECU will set the relevant DTC Irregular change in the wheel speed sensor signal Wheel speed sensor signal continuously indicates high value PROBABLE CAUSES Current trouble Excessive gap between the wheel speed sensor and the wheel speed detection encoder Adhesion of foreign materials on the wheel speed sensor Adhesion of foreign materials on the wheel speed detection encoder Wheel bearing malfunction Malfunction of wheel speed sensor Damaged wiring harness and connectors External noise interference Improper installation of the wheel speed sensor Deformation of the wheel speed detection encoder ASC ECU malfunction Disturbance of magnetization pattern for wheel speed detection encoder The number of poles on the Magnetic encoder for wheel speed detection N pole and S pole is changed TSB Revision ACTIVE STABILITY CONTROL SYST
43. oS z 200 19 0 128 Lu oF z Zr ea a gt 32 1 2 8 Y Y Y ASC ECU A 51 SOLENOID MOTOR POWER SUPPLY GCOCOCOO0COUEL POWER SUPPLY R FUUAIIUSAIIID G T SUPPLY GND GND V V 16 4 5 5 lt lt all E ea ea WAH35M006A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 213 DIAGNOSIS Connector A 51 AC802869AC A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION The ASC ECU stores diagnostic trouble codes and failure infor mation in the EEPROM ASC ECU EEPROM contains the power supply circuit termi nal No 2 NOTE EEPROM Electrical Erasable and Programmable ROM DTC SET CONDITIONS This DTC is set when the failure information stored in the EEPROM is not reliable The failure information stored in the past is not output and only this DTC is set This DTC may occur when ASC ECU power supply shut down or drop between ASC ECU is writing a data to the EEPROM PROBABLE CAUSES Disconnection of the
44. voltage Enabled Enabled Prohibited 9 Prohibited Prohibited Prohibited Abnormality in sensor calibration Enabled Enabled Prohibited Prohibited Prohibited Prohibited Abnormality in steering wheel sensor signal Enabled Enabled Prohibited Prohibited Prohibited Abnormality in steering wheel sensor calibration Steering wheel sensor neutral point not learned Internal abnormality in steering wheel sensor Enabled Enabled Enabled Enabled Prohibited Prohibited Prohibited Prohibited Prohibited Prohibited Valve calibration error Prohibited Prohibited Prohibited Prohibited Prohibited Control parameter not implement Enabled Enabled Prohibited Prohibited Prohibited Implausible diagnosis data Enabled Enabled Enabled Enabled Enabled Bus off Enabled Enabled Enabled Enabled Enabled Engine time out error Enabled Enabled Enabled Enabled Enabled 5 CVT time out error Enabled Enabled Enabled Enabled Enabled TC SST time out error 6 Enabled Enabled Enabled Enabled Enabled Steering wheel sensor time out error Enabled Enabled Enabled Enabled Enabled ETACS time out error Enabled Enabled Enabled TSB Revision Enabled Enabled ACTIVE STABILITY CONTRO
45. wheel speed sensor Abnormality in periodical signal for RL wheel speed sensor Abnormality in periodical signal for RR wheel speed sensor Enabled Prohibited Prohibited TSB Revision Prohibited Prohibited 35C 20 Item EBD ABS Skid control ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS TCL HSA FL wheel speed sensor control phase time exceeded FR wheel speed sensor control phase time exceeded RL wheel speed sensor control phase time exceeded RR wheel speed sensor control phase time exceeded Enabled Prohibited Prohibited Prohibited Prohibited Abnormality in FL wheel inlet valve system Abnormality in FR wheel inlet valve system Abnormality in RL wheel inlet valve system Abnormality in RR wheel inlet valve system Prohibited Prohibited Prohibited Prohibited Prohibited Abnormality in FL wheel outlet valve system Abnormality in FR wheel outlet valve system Abnormality in RL wheel outlet valve system Abnormality in RR wheel outlet valve system Prohibited Prohibited Prohibited Prohibited Prohibited Abnormality in FL RR wheel cut valve system Abnormality in FR RL wheel cut valve system Abnormality in FL RR wheel suction valve system Abnormality in FR RL wheel suction valve system Faulty valve power supply circuit Faulty mot
46. when the G and yaw rate sensor is replaced gt 1 Carry out steps 1 to 13 of the G and yaw rate sensor calibration for vehicles without TC SST 2 Select the relevant system from the menu 3 Select ACD AYC from the system lists in System select and press OK button 4 Select Special function in ACD AYC Select Sensor calibration in Special function 6 Select Lateral G sensor calibration from the selected item and press OK button 7 The screen displays Lateral G sensor calibration The selected command will be executed Are you sure Caution Please check the execution conditions Then press OK button 8 Execute The command was executed will be shown Then press OK button c1 TSB Revision ai ACTIVE STABILITY CONTROL SYSTEM ASC 35C 304 ON VEHICLE SERVICE 9 Select Longitudinal G SNS calibration from the selected item and press OK button 10 The screen displays Longitudinal G SNS calibration The selected command will be executed Are you sure Caution Please check execution conditions Then press OK button 11 Executed The command was executed will be shown Then press OK button 12 Learning neutral point complete 13 Turn the ignition switch to LOCK OFF position and then disconnect the scan tool STEERING WHEEL SENSOR CALIBRATION M1355009200189 Vehicles without TC SST gt A CAUTION After the next operation has been completed carry out the fol
47. x Al PINK WHITE RED BLACK O C 9 9 LH A 07 RH A 02 LH r 2i RH F 02 9 FRONT WHEEL SPEED SENSOR REAR WHEEL SPEED SENSOR WAS35M000A Connector A 51 Connector C 39 AC802706BD TSB Revision 35C 76 ACTIVE STABILITY CONTROL SYSTEM ASC Connector D 11 AC807570 AH DIAGNOSIS Connector F 02 AC807572 BF N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generat
48. 16 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 74 DIAGNOSIS STEP 15 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1027 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 16 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 16 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1027 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C T9 DTC C1032 Abnormality in RR wheel speed sensor signal Wheel Speed Sensor Circuit PINK WHITE Ba oO sIep7I8 ITJHEEEE CHEESE RE E PR LI YELLOW SKY BLUE VIOLET GREEN PINK WHITE N e gt en eo ND e TO m 9 1011121314131 4 O s5 6 7 8 9 ATT 16 1 71 8r 2921 22 p eo heh IND
49. 305 8 As SAS initialization is selected under SAS Calibration press OK button NOTE At this time if the steering angle sensor neutral point has been learned the display will show Do you want to start Note This operation will dear DTCs Then press OK button 9 The display should show Completed Press OK button 10 Press the OK button 11 The display should show SAS Calibration Do you want to start Then press the OK button NOTE Please execute after making a tire and a steering wheel straight 12 The display should show Completed Press OK button 13 Turn the ignition switch to LOCK off position and then turn the ignition switch ON again 14 Select the relevant system from the menu 15 Select ABS ASC ASTC WSS from the system list under System select and press OK button 16 Select Special function under ABS ASC ASTC WSS 17 Select Sensor calibration under Special function 18 Select SAS calibration under Sensor calibration and press OK button 19 The screen displays SAS calibration The selected command will be executed Are you sure Caution Confirm the execution conditions Then press OK button 20 Executed The command was executed will be shown Then press OK button 21 Select Diagnostic trouble code under ABS ASC ASTC WSS If the diagnostic trouble code C2205 SAS internal failure past trouble is set clear it 22 Learning neutral point complete 23
50. 8 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C101F set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 9 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 89 STEP 9 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C101F set YES Return to Step 1 NO The procedure is complete Code No C102A Mutual monitoring of RL wheel speed sensor A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is
51. 8r 2921 22 p eo heh IND x Al PINK WHITE RED BLACK O C D 9 LH A 07 RH A 02 LH r 2i RH F 02 9 FRONT WHEEL SPEED SENSOR REAR WHEEL SPEED SENSOR WAS35M000A Connector A 51 Connector C 39 AC802706BD TSB Revision 35C 68 ACTIVE STABILITY CONTROL SYSTEM ASC Connector D 15 AC807570AJ DIAGNOSIS Connector F 21 AC807572 BE A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed
52. ACTIVE STABILITY CONTROL SYSTEM ASC 35C 13 DIAGNOSIS FAIL SAFE FUNCTIONS When a malfunction is determined by the diag NOTE The brake warning light and brake warn nostic function ASC ECU illuminates the ABS ing display are used as the EBD control warning warning light ABS warning display brake warn light ing light brake warning display ASC OFF dis When the brake pad temperature assumed play and ASC warning display and light At the exceeds the specified value the ASC OFF dis same time ASC ECU prohibits the ABS EBD play flashes 2 Hz skid control and TCL control TSB Revision 35C 14 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS Illumination condition of warning light and display in case of failure Brake warning light brake warning display ABS warning light ABS warning display ASC warning display and light ASC OFF display Abnormality in FL wheel speed sensor circuit Abnormality in FR wheel speed sensor circuit Abnormality in RL wheel speed sensor circuit Abnormality in RR wheel speed sensor circuit OFF ON Abnormality in FL wheel speed sensor signal Abnormality in FR wheel speed sensor signal Abnormality in RL wheel speed sensor signal Abnormality in RR wheel speed sensor signal Mutual monitoring of FL wheel speed sensor Mutual monitoring of FR wheel speed sensor Mutual monitoring of RL wheel speed senso
53. CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal Do not drop or shock the G and yaw rate sensor When the G and yaw rate sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 302 When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU controls ASC by calculating the data sent from the wheel speed sensor the steering wheel sensor and the G and yaw rate sensor DTC SET CONDITIONS This DTC is set when ASC operates for a prolonged period NOTE This DTC may be set when the vehicle runs on a slip pery or rough road PROBABLE CAUSES e Steering wheel sensor malfunction Gand yaw rate sensor malfunction Improper installation of steering wheel sensor or G and yaw rate sensor e ASC ECU malfunction Different steering wheel Wheel alignment not performed DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 159 STEP 1 Using scan t
54. CONTROL SYSTEM ASC DIAGNOSIS 35C 253 STEP 6 Using scan tool MB991958 check the other system DTC Using scan tool check that DTC U0121 is not set by the ETACS system Q Is the DTC set YES Perform troubleshooting on ETACS ECU Refer to GROUP 54A ETACS Troubleshooting P 54A 683 Then go to Step 8 NO Go to Step 7 STEP 7 Retest the system Q Does the ABS warning light turn ON and OFF normally YES Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 8 STEP 8 Retest the system Q Does the ABS warning light turn ON and OFF normally YES The procedure is complete NO Return to Step 1 Inspection Procedure 7 ASC warning display and light stays ON after the engine is started A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Trouble code diagnosis P 54C 9 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU sends the illumination request signal of the ASC warning display and light to
55. D 9 LH A 07 RH A 02 LH r 2i RH F 02 9 FRONT WHEEL SPEED SENSOR REAR WHEEL SPEED SENSOR WAS35M000A Connectors A 02 A 51 AC802869AD TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 37 DIAGNOSIS A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS ASC ECU monitors the voltage fluctuation in each w
56. Hydraulic unit bracket A TSB Revision 35C 312 ACTIVE STABILITY CONTROL SYSTEM ASC HYDRAULIC UNIT REMOVAL SERVICE POINT A HYDRAULIC UNIT ASC ECU REMOVAL A CAUTION Becareful when removing the hydraulic unit because it is heavy Never loosen the nuts and the bolts because the hydraulic unit cannot be disassembled Do not drop or shock the hydraulic unit Do not turn the hydraulic unit upside down or lay down the unit because the inner air becomes difficult to be bled INSTALLATION SERVICE POINT gt gt A lt lt BRAKE TUBE CONNECTION Install the brake pipe to the hydraulic unit as shown in the fig ure NS 1 FA o 2 To rear brake RH Marking color White From master cylinder secondary Marking color Yellow C and white gt K au o 3 To front brake LH Marking color Red and white BN oa UN Sy 4 To front brake RH lt Marking color Orange and white gt s A E QU NN C 5 From master cylinder primary lt Marking color Blue and V 6 L Ws white nud AC703834AB 6 To rear brake LH Marking color Pink TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC j WHEEL SPEED SENSOR 35C 313 WHEEL SPEED SENSOR REMOVAL AND INSTALLATION lt FWD gt N CAUTION The vehicle speed detection encoder collects any metallic particle easily because it is magnetized Make sure that the encoder should not collect
57. M T OK lt CVT gt CVT Engine type OK 2 4L D4 MPI VVT Engine power OK Normal Chassis type for A S C OK Type 4 Final drive OK Front Drive Transfer OK 2WD SAS OK Present 4WD AWD OK Not present TCM OK lt 5M T gt Not present OK lt CVT gt Present ACDAYC OK Not present Q Is the check result normal YES Go to Step 5 NO Replace the ETACS ECU Refer to GROUP 54A ETACS ECU P 54A 769 and then go to Step 7 STEP 5 Engine control module ECM coding data check Refer to GROUP 00 Coding List P 00 28 Q Is the check result normal YES Go to Step 6 NO Replace the engine control module ECM Refer to GROUP 13B engine control module ECM P 13B 1022 gt and then go to Step 7 STEP 6 Check the part number of ETACS ECU Check the part number of ETACS ECU Q Is the check result normal YES Go to Step 7 NO Replace the ETACS ECU Refer to GROUP 54A ETACS ECU P 54A 769 and then go to Step 7 TSB Revision S ACTIVE STABILITY CONTROL SYSTEM ASC 35C 234 DIAGNOSIS STEP 7 Check the part number of ASC ECU Check the part number of ASC ECU Q Is the check result normal YES Go to Step 8 NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 9 STEP 8 Check whether the DTC is reset Q Is DTC U1417 set YES Replace the ASC ECU Refer to P 35C 311 and then go to Step 9 NO The trouble can be an intermittent malfunction Refer t
58. NO lt Deformation FWD gt Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 Then go to Step 15 NO lt Deformation AWD gt Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 Then go to Step 15 STEP 14 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1048 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 15 NO The procedure is complete STEP 15 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1048 set YES Return to Step 1 NO The procedure is complete TSB Revision a ACTIVE STABILITY CONTROL SYSTEM ASC 35C 126 DIAGNOSIS DTC C1049 RR wheel speed sensor control phase time exceeded Wheel Speed Sensor Circuit PINK WHITE Ba oO sIep7I8 ITJHEEEE CHEESE RE E PR LI YELLOW SKY BLUE VIOLET GREEN PINK WHITE N e gt en eo ND e 4 O d 9 Konza
59. Refer to P 35C 321 Q Is the check result normal YES Go to Step 5 NO Install the steering wheel sensor correctly Refer to P 35C 321 and then go to Step 5 STEP 5 Wheel alignment check Q Is the check result normal YES After the wheel alignment check perform the steering wheel sensor calibration to make ASC ECU learn the neutral point again Refer to P 35C 304 Then go to Step 6 NO After the adjustment of the wheel alignment perform the steering wheel sensor calibration to make ASC ECU learn the neutral position again Refer to P 35C 304 Then go to Step 6 STEP 6 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 tem 11 Steering angle Q Is the check result normal YES Go to Step 7 NO After the steering wheel sensor is replaced perform the steering wheel sensor calibration to make ASC ECU learn the neutral point again Refer to P 35C 304 Then go to Step 8 STEP 7 Check whether the DTC is reset Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1219 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 8 NO The procedure is complete STEP 8 Check whether the DTC is reset Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless
60. Tool M U T IIl Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A A CAUTION To prevent damage to scan tool MB991958 always turn the ignition switch to the LOCK OFF position before con necting or disconnecting scan tool MB991958 1 Ensure that the ignition switch is at the LOCK OFF position 2 Start up the personal computer 3 Connect special tool MB991827 to special tool MB991824 and the personal computer 4 Connect special tool MB991910 to the special tool MB991824 5 Connect special tool MB991910 to the data link connector 6 Turn the power switch special tool MB991824 to the ON position NOTE When the special tool MB991824 is energized the special tool MB991824 indicator light will be illuminated in a green color 7 Start the M U T III system on the personal computer NOTE Disconnect the scan tool MB991958 in the reverse order of the connecting sequence making sure that the ignition switch is at the LOCK OFF position HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES Required Special Tools e MB991958 Scan Tool M U T IIl Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 25 a DIN NOS n LLL N CAUTION To prevent damage to scan tool MB9919
61. USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostics table P 54C 16 Then go to Step 7 STEP 2 ASC OFF switch check Refer to P 35C 310 Q Is the check result normal YES Go to Step 3 NO Replace ASC OFF switch Refer to P 35C 309 Then go to Step 7 STEP 3 Connector check C 313 ETACS ECU connector C 36 intermediate connector C 45 ASC OFF switch connector Q Is the check result normal YES Go to Step 4 NO Repair the damaged connector TSB Revision s ACTIVE STABILITY CONTROL SYSTEM ASC 35C 262 DIAGNOSIS STEP 4 Wiring harness check between C 313 ETACS ECU connector terminal No 15 and C 45 ASC OFF switch connector terminal No 1 Check the signal circuit for open and short circuit Q Is the check result normal YES Go to Step 5 NO Repair the wiring harness between C 313 ETACS ECU connector terminal No 15 and C 45 ASC OFF switch connector terminal No 1 STEP 5 Wiring harness check between C 45 ASC OFF switch connector terminal No 2 and the body ground Check the ground wires for open circuit Q Is the check result normal YES Go to Step 6 NO Repair the wiring harness between C 45 ASC OFF switch connector terminal No 2 and the body ground STEP 6 Retest the sy
62. YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 11 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 11 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1020 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C AT DTC C102B Abnormality in RR wheel speed sensor circuit Wheel Speed Sensor Circuit PINK WHITE Ba oO sIep7I8 ITJHEEEE CHEESE RE E PR LI YELLOW SKY BLUE VIOLET GREEN PINK WHITE N e gt en eo ND e 4 O d 9 Konza 4 O s5 6 7 8 9 ATT 16 1 71 8r 2921 22 p eo heh IND x Al PINK WHITE RED BLACK O C D 9 LH A 07 RH A 02 LH r 2i RH F 02 9 FRONT WHEEL SPEED SENSOR REAR WHEEL SPEED SENSOR WAS35M000A Connector A 51 Connector C 39 AC802706BD
63. a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS ASC ECU monitors the signals from each wheel speed sensor while the vehicle is being driven If any fault below is found in these sensor signals ASC ECU will set the relevant DTC Missing wheel speed sensor signal Wheel speed sensor signal continuously indicates low value TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 90 DIAGNOSIS PROBABLE CAUSES Current trouble Excessive gap between the wheel speed sensor and the wheel speed detection encoder Adhesion of foreign materials on the wheel speed sensor Wheel bearing malfunction Deformation of the wheel speed detection encoder Adhesion of foreign materials on the wheel speed detection encoder Malfunction of wheel speed sensor Improper installation of the wheel speed sensor ASC ECU malfunction The number of poles on the Magnetic encoder for wheel speed detection N pole and S pole is changed Past trouble When DTC C1020 is also set carry
64. and P 35C 308 OPERATION ASC ECU contains the power supply circuit terminal No 1 for the pump motor The pump motor is energized by the motor switch which is incorporated in ASC ECU The pump motor switch which is incorporated in ASC ECU is always off unless the motor solenoid valve check is acti vated when the vehicle is started e ASC ECU activates the pump motor by turning on the ECU built in pump motor switch DTC SET CONDITIONS DTC C1073 f the pump motor switch voltage drop indicates high value when the pump motor operates or after the operation the pump motor operation is stopped and this DTC is set DTC C2116 When the power supply voltage of the pump motor which is not in operation is abnormally low for a prolonged period When the power supply voltage of the pump motor which is not in operation is abnormally high for a prolonged period PROBABLE CAUSES Current trouble Fusible link malfunction Damaged wiring harness and connectors Abnormality in battery or generator ASC ECU malfunction TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 141 DIAGNOSIS Past trouble Carry out diagnosis with particular emphasis on wiring har ness and connector failures between the power supply cir cuit A 51 ASC ECU connector terminal No 1 to the ASC ECU motor and the ground circuit A 51 ASC ECU connector terminal No 16 and 47 For diagnosis proce dures refer to How to treat
65. check result normal YES Go to Step 12 NO Reinstall the wheel speed sensor FR correctly Refer to P 35C 316 Then go to Step 15 TSB Revision 35C 11 Wheel bearing Oil seal 8 ACTIVE STABILITY CONTROL SYSTEM ASC Magnetic encoder AC504925AC DIAGNOSIS STEP 12 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the wheel bearing FR for looseness Refer to GROUP 26 On vehicle Service P 26 10 Q Is the check result normal YES Go to Step 13 NO Replace the wheel bearing Refer to GROUP 26 Front axle hub assembly P 26 16 Then go to Step 15 STEP 13 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 14 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction Then go to Step 15 NO Deformation Replace the wheel bearing Refer to GROUP 26 Front axle hub assembly P 26 16 Then go to Step 15 STEP 14 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases
66. completion go to Step 4 STEP 2 Check whether the DTC is reset Q Is DTC C2205 set YES Replace the steering wheel sensor Refer to P 35C 321 and then go to Step 3 NO The procedure is complete STEP 3 Check whether the DTC is reset Q Is DTC C2205 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 4 NO The procedure is complete STEP 4 Check whether the DTC is reset Q Is DTC C2205 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 203 DTC C1395 Brake fluid filling not completed N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 DTC SET CONDITIONS This DTC is set when the brake fluid is not filled in the hydraulic unit PROBABLE CAUSES Different hydraulic unit For delivery to factory e ASC ECU malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991
67. connector AC606869DA STEP 9 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the resistance between the wheel speed sensor power supply terminal signal terminal No 34 and the body ground and between the wheel speed sensor ground terminal No 33 and the body ground OK No continuity Check harness Q Is the check result normal YES Go to Step 12 NO Not normal at the terminal No 34 or No 33 Go to MB991997 ASC ECU De Step 10 A 51 ASC ECU harness connector AC606869DB TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 65 STEP 10 Connector check A 51 ASC ECU connector A 02 wheel speed sensor lt FR gt connector Q Is the check result normal YES Go to Step 11 NO Repair the defective connector Then go to Step 16 STEP 11 Wiring harness check between A 51 ASC ECU connector terminal No 34 and A 02 wheel speed sensor lt FR gt connector terminal No 1 and between A 51 ASC ECU connector terminal No 33 and A 02 wheel speed sensor lt FR gt connector terminal No 2 e Check for short circuit in wheel speed sensor lt FR gt circuit Q Is the check result no
68. ensure that the communica tion circuit is normal When DTC C2003 is set in ASC ECU the DTC may also be set in ETACS ECU When the DTC is set in ETACS ECU carry out the diagnosis of the DTC for ETACS ECU first When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU receives the vehicle information stored in the ETACS ECU via CAN bus lines DTC SET CONDITIONS When received unset coding data from the ETACS ECU this DTC is set PROBABLE CAUSES Malfunction of ETACS ECU Engine control module ECM malfunction ETACS ECUS have been interchanged between two vehi cles ASC ECU malfunction ASC ECUS have been interchanged between two vehicles ETACS ECU or ASC ECU installation error Malfunction of ETACS ECU coding data TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 209 DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnost
69. exists 2 O or less Q Is the check result normal YES The trouble can be an intermittent malfunction Refer to GROUP 00 How to use Troubleshooting inspection Service Points How to Cope with Intermittent Malfunction P 00 13 NO The open circuit may be present in the power supply circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 2 and the C 315 ETACS ECU connector terminal No 4 Then go to Step 20 STEP 17 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the C 315 ETACS ECU connector 2 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 3 Measure the resistance between the terminal No 2 and the body ground OK No continuity Q Is the check result normal YES Replace the fuse No 17 Then go to Step 20 NO The short circuit may be present in the power supply circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 2 and the C 315 ETACS ECU connector terminal No 4 and then replace the fuse No 17 Then go to Step 20 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 276 DIAGNOSIS STEP 18 Resistance measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC chec
70. front wheel speed sensor to the harness clip as shown in the figure TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 31 6 WHEEL SPEED SENSOR gt gt C lt lt FRONT WHEEL SPEED SENSOR GROMMET REAR WHEEL SPEED SENSOR GROMMET INSTALLATION Install the front wheel speed sensor grommet and the rear Front wheel speed wheel speed sensor grommet to the body panel snugly as sensor grommet shown in the figure lt Front gt Body panel V u n lt Rear gt Rear wheel speed sensor grommet ET EET 9 S S fdb e 2 Hi Body panel AC608809 AB REMOVAL AND INSTALLATION lt AWD gt lt FRONT gt As for removal and installation of the front wheel speed sensor refer to Wheel Speed Sensor Removal and Installation P 35C 313 lt FWD gt M1355005300430 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC f WHEEL SPEED SENSOR 35C 317 lt REAR gt A CAUTION The vehicle speed detection encoder collects any metallic particle easily because it is magnetized Make sure that the encoder should not collect any metallic particle Check that there is not any trou ble prior to reassembling it Pre removal and post installation operation Rear scuff plate rear door opening trim cargo floor box trunk room rear end trim flexible floor plug flexible floor guide quarter trim removal and installation Refer to GROUP 52A Interior trim P 52A 11 Rear wheel speed sensor
71. harness and connector failures between ASC ECU and the wheel speed sensor For diag nosis procedures refer to How to treat past trouble GROUP 00 How to Cope with Intermittent Malfunction P 00 13 When DTC C100A is not set the following conditions may be present e Some wheels slip Unstable vehicle attitude External noise interference Vehicle ran with the parking brake applied Rotate only two wheels with drum tester DIAGNOSIS Re quired Special Tools MB991958 Scan Tool M U T IIIl Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T IIl Main Harness A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 84 DIAGNOSIS STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1014 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the DTC Check that DTC C100A is also set Q Is DTC C100A also set YES Perform the diagnosis for DTC C100A Refer to P 35C 30 NO Go to Step 4 STEP 4 Check for wheel speed sensor installation Check how the wheel speed sensor FL is installed Discon nection o
72. hub assembly P 26 16 STEP 8 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1014 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 9 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 9 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1014 set YES Return to Step 1 NO The procedure is complete TSB Revision 35C 86 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS DTC C101F Mutual monitoring of FR wheel speed sensor A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed det
73. in the figure wheel sensor 2 Install the steering wheel sensor to the column switch assembly maintaining the neutral position correctly NOTE A new steering wheel sensor has a pin for pre venting the rotation of fixing the steering wheel sensor After installing the column switch assembly remove this pin 3 Install the column switch assembly to the vehicle maintaining the neutral position correctly TSB Revision
74. lt RL gt correctly Refer to P 35C 316 Then go to Step 15 STEP 12 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the Rear wheel hub assembly RL FWD gt Refer to GROUP 27A On vehicle Service P 27A 5 e Check the wheel bearing lt RL AWD gt for looseness Refer to GROUP 27B On vehicle Service P 27B 1 7 Q Is the check result normal YES Go to Step 13 NO FWD Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 Then go to Step 15 NO AWD Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 Then go to Step 15 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 125 lt FWD gt Ball bearing Magnetic Rear ie 7 encoder Oil seal lt AWD gt Rear wheel bearing o 1 Magnetic encoder 4 Rear hub assembly AC704785AB DIAGNOSIS STEP 13 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 14 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction
75. mation Q Is the check result normal YES Go to Step 8 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction NO lt Deformation FWD gt Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 NO lt Deformation AWD gt Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 STEP 8 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 36 and the body ground and between the wheel speed sensor ground terminal No 37 and the body ground OK 1 volt or less Q Is the check result normal YES Go to Step 9 NO Not normal at the terminal No 36 or No 37 Go to Step 10 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 72 DIAGNOSIS STEP 9 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB9
76. outputs pulse vehicle moved while the vehicle is parked The HSA is affected by the loading conditions and vehicle posture at the occurrence of phenomenon When checking the HSA operation in actual driving carry out the check on the vehicle with one occupant driver only PROBABLE CAUSES Improper installation of the G and yaw rate sensor G and yaw rate sensor malfunction Calibration failure of the brake fluid pressure sensor Seizure of the parking brake switch Malfunction of wheel speed sensor Malfunction of hydraulic unit integrated with ASC ECU Wiring harness or connector failure of CAN bus line Damaged wiring harness and connectors DIAGNOSIS Required Special Tools MB991958 Scan Tool M U T Ill Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness TSB Revision s ACTIVE STABILITY CONTROL SYSTEM ASC 35C 286 DIAGNOSIS STEP 1 HSA operation check Check if the HSA works with one occupant driver only in the vehicle Q Is the check result normal YES This diagnosis is complete NO Go to Step 2 STEP 2 Parking brake check With the parking brake not pulled check if the brake warning light is illuminated Q Is the brake warning light illuminated with the parking brake not pulled YES Carry out the Inspection procedure 3 Brake Warning light Stays ON with the Parking Brake Lev
77. part number of ETACS ECU Q Is the check result normal YES Go to Step 7 NO Replace the ETACS ECU Refer to GROUP 54A ETACS ECU P 54A 769 and then go to Step 8 STEP 7 Check whether the DTC is reset Q Is DTC C2003 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 8 NO The trouble can be an intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 8 Check whether the DTC is reset Q Is DTC C2003 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 21 2 DIAGNOSIS DTC C1608 Implausible diagnosis data Solenoid Valve Motor and ASC ECU Power Supply Circuit FUSIBLE FUSIBLE FUSIBLE LINK LINK 6 LINK 4 TENA IGNITION SWITCH C 212 41516 o Du s og fa JAC he fag ae Meal ee v gy ted 2 Lu E LEX D HANU Sa HOH 1 C 309 6 c 317 elebo unas ETACS H ECU Y a LLI i lt z I ac REN 5 mo O RELAN 3 sesso zT z 0 315 4 boy ee 3 4 516 RUNE 7 8 dus id SFE 13 14 151 e r7 re 19
78. past trouble GROUP 00 How to Cope with Intermittent Malfunction P 00 13 e When DTC C1020 is not set the following conditions may be present e Some wheels slip Unstable vehicle attitude External noise interference Vehicle ran with the parking brake applied DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1027 set YES Go to Step 3 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 70 DIAGNOSIS STEP 3 Using scan tool MB991958 check the DTC Check that the DTC C1020 is also set Q Is DTC C1020 also set YES Perform the diagnosis for the DTC C1020 Refer to P 35C 41 NO Goto Step 4 STEP 4 Check for wheel speed sensor installation Check how the wheel speed sensor RL is installed Discon nection of wheel speed sensor loose mounting bolt etc Q Is the check result normal YES Go to Step 5 NO Reinstall the wheel speed senso
79. past trouble GROUP 00 How to Cope with Intermittent Malfunction P 00 13 DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C l e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1073 or C2116 set YES Go to Step 3 NO The procedure is complete STEP 3 Battery check Refer to GROUP 544A Battery Test P 54A 8 Q Is the battery in good condition YES Go to Step 5 NO Replace the battery Then go to Step 4 STEP 4 Charging system check Refer to GROUP 16 Charging System P 16 4 Q Is the charging system in good condition YES Go to Step 5 NO Repair or replace the charging system component s Then go to Step 11 STEP 5 Connector check A 51 ASC ECU connector Q Is the check result normal YES Go to Step 6 NO Repair the defective connector Then go to Step 11 TSB Revision 35C 142 ACTIVE STABILITY CONTROL SYSTEM ASC Check harness MB991997 ASC ECU A 51 ASC ECU harness connector A
80. procedure is complete STEP 3 Brake pedal check Refer to GROUP 35A On vehicle Service P 35A 14 Q Is the check result normal YES Go to Step 4 NO Adjust the brake pedal height Refer to GROUP 35A On vehicle Service P 35A 14 Then go to Step 9 STEP 4 Check for stoplight switch installation Refer to GROUP 35A On vehicle Service P 35A 14 Q Is the check result normal YES Go to Step 5 NO Install the stoplight switch correctly Refer to GROUP 35A On vehicle Service P 35A 14 and then go to Step 9 TSB Revision 35C 148 ACTIVE STABILITY CONTROL SYSTEM ASC Continuity No continuity BEEN m 4 0 0 5 mm 0 16 0 02 in AC901847AB DIAGNOSIS STEP 5 stoplight switch continuity check 1 Remove the stoplight switch Refer to GROUP 35A Brake Pedal P 35A 31 2 Connect the circuit tester O range to the stoplight switch connector terminals No 1 and 2 3 When no continuity is detected with the plunger pressed from the edge of the outer case by the dimension shown in the figure and when continuity is detected with the plunger released the stoplight switch is in good condition Q Is the check result normal YES Go to Step 6 NO Replace the stoplight switch Refer to GROUP 35A Brake Pedal P 35A 31 and then go to Step 9 STEP 6 Brake drag check Check the brake system for drag Q Is the check result normal YES Go to Step 7
81. rate sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 302 When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 177 DIAGNOSIS OPERATION ABS ECU monitors if the output of G and yaw rate sensor is normal or not DTC SET CONDITIONS This DTC is set if any malfunction below is found When the output value of the longitudinal G sensor is abnormal When abnormality is detected by the self diagnosis of the longitudinal G sensor PROBABLE CAUSES Wiring harness or connector failure for the special CAN bus lines between ASC ECU and the G and yaw rate sensor Gand yaw rate sensor malfunction e ASC ECU malfunction External noise interference DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 D
82. section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS This DTC is set if any malfunction below is found When the brake fluid pressure is decreased for a long time When the brake fluid pressure is held for a long time NOTE ASC controls the vehicle based on the wheel speed sig nal When the brake fluid pressure is decreased or held for an abnormally long time the wheel speed sensor signal may have a problem PROBABLE CAUSES Damaged wiring harness and connectors External noise interference Malfunction of wheel speed sensor ASC ECU malfunction Excessive gap between the wheel speed sensor and the wheel speed detection encoder TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 128 DIAGNOSIS Adhesion of foreign materials on the wheel speed sensor Adhesion of foreign materials on the wheel speed detection encoder Wheel bearing malfunction Improper installation of the wheel speed sensor Deformation of the wheel speed detection encoder Disturbance of magnetization pattern for wheel speed detection encoder Missing teeth of the wheel speed detection encoder DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I
83. signal to ASC ECU via the special CAN bus lines DTC SET CONDITIONS This DTC is set when the ASC ECU cannot receive the signal from the G and yaw rate sensor although there is no abnormal ity in ASC ECU supply voltage NOTE When an abnormality is present in the ASC ECU supply voltage DTC C2100 low voltage error is set and DTC U0125 is not set PROBABLE CAUSES Wiring harness or connector failure for the special CAN bus lines between ASC ECU and the G and yaw rate sensor Gand yaw rate sensor malfunction e ASC ECU malfunction External noise interference DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use M U T III to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC U0125 set YES Go to Step 3 NO The procedure is complete STEP 3 Connector check A 51 ASC ECU connector C 137 G and yaw rate sensor connector Q Is the check result normal YES Go to Step 4 NO Repair the connector and then go to Step 7 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 223 DIAGN
84. special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool to ASC ECU 2 Measure the resistance between the wheel speed sensor power supply terminal signal terminal No 34 and the body ground and between the wheel speed sensor ground terminal No 33 and the body ground OK No continuity Q Is the check result normal YES Go to Step 7 NO Not normal at the terminal No 34 or No 33 Go to Step 8 STEP 7 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the ASC ECU side connector and harness side connector and then measure the voltage at the special tool connector side 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 34 and body ground and between the ground terminal No 33 and body ground OK Terminal No 34 and body ground Battery posi tive voltage Terminal No 33 and body ground 1 volt or less Q Is the check result normal YES Go to Step 8 NO Go to Step 10 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 40 DIAGNOSIS STEP 8 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 9 NO Replace the wheel speed sensor
85. switch Brake fluid level is lower than the LOWER marking Low Brake fluid level is higher than the LOWER marking Normal ASC TCL off switch When the ASC OFF switch is not operated when the ASC control is available ON When the ASC OFF switch is operated pressed and held for 3 seconds or more when the ASC control is prohibited When the ASC OFF switch is operated pressed and held for 15 seconds or more when the ASC OFF control is prohibited by fail safe function SAS OK flag When the steering wheel sensor neutral point is learned Comp When the steering wheel sensor neutral point is not learned Not Comp When the steering wheel sensor is defective SAS fail SAS fail amp No Comp Engine Speed Engine torque APP sensor When the accelerator pedal is depressed engine started The tachometer display and the scan tool display almost agree with each other Displays the engine torque Displays the accelerator pedal opening angle Allow ESP torque request Permitted Target gear Actual gear When the selector lever is operated Displays the selector lever position Master cylinder pressure Offset The difference between the neutral position that was input to the ASC ECU before the master cylinder pressure sensor calibration and the neutral position after the calibration 8 to 8 bar Lateral G sensor offset
86. switch is turned to the ON position Engine stopped P 35C 246 Brake warning light does not illuminate when the ignition switch is turned to ON position Engine stopped P 35C 249 ABS warning light stays ON after the engine is started P 35C 251 ASC warning display stays ON after the engine is started P 35C 253 ASC OFF display or ASC OFF light stays ON after the engine is started The skid control TCL system cannot be disabled when ASC OFF switch is pressed for 3 seconds or more to turn the system OFF P 35C 256 P 35C 260 Abnormality in brake operation P 35C 262 Skid control TCL does not work P 35C 264 ASC ECU power supply circuit system ABS skid control TCL operates too frequently P 35C 266 P 35C 276 Steering wheel sensor power supply circuit system P 35C 280 HSA Hill Start Assist does not work P 35C 284 HSA Hill Start Assist works on a flat road TSB Revision P 35C 289 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 239 SYMPTOM PROCEDURES Inspection Procedure 1 Scan tool communication with ABS ASC system is impossible N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal If th
87. the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1043 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 6 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 6 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1043 set YES Return to Step 1 NO The procedure is complete TSB Revision 35C 104 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS DTC C1044 Abnormality in periodical signal for RR wheel speed sensor A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of
88. the combination meter through ETACS ECU via the CAN communication COMMENTS ON TROUBLE SYMPTOM This may be caused by faults in the CAN bus line ETACS ECU combination meter or ASC ECU PROBABLE CAUSES Damaged wiring harness and connectors Malfunction of ETACS ECU TSB Revision s ACTIVE STABILITY CONTROL SYSTEM ASC 35C 254 DIAGNOSIS Combination meter malfunction e ASC ECU malfunction Control is disabled due to the low voltage NOTE Due to the abnormality in the supply voltage the DTC may not be set even when the ASC warning display illuminates DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostics table P 54C 16 Then go to Step 8 STEP 2 Using scan tool MB991958 check the DTC Use scan tool to check the DTC for the ASC system Q Is the DTC set YES Carry out the diagnosis for the DTC Refer to P 35C 27 NO Goto Step 3 STEP 3 Actuator test of combination meter Perform the following actuator test by the combination meter system and check if the ASC warning display illuminates nor mally Refer to
89. the following actuator tests Item No 01 FL wheel ABS drive Item No 02 FR wheel ABS drive Item No 03 RL wheel ABS drive Item No 04 RR wheel ABS drive Item No 05 FL wheel TCL drive Item No 06 FR wheel TCL drive Item No 07 RL wheel TCL drive Item No 08 RR wheel TCL drive Q Is the check result normal YES The procedure is complete NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 Inspection Procedure 11 ASC does not operate or faulty ASC operate A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Trouble code diagnosis P 54C 9 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 COMMENTS ON TROUBLE SYMPTOM In case of this trouble symptom the skid control TCL system operation may be disabled DTC may be set by the skid con trol TCL system using scan tool PROBABLE CAUSES Low battery output Wiring harness or connector failure of CAN bus line ASC ECU malfunction Engine control module coding data problem DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication I
90. the one from the wheel speed sensor and the G and yaw rate sensor PROBABLE CAUSES Improper installation of steering wheel sensor Wheel alignment not performed Steering wheel sensor malfunction Different steering wheel G and yaw rate sensor malfunction Malfunction of wheel speed sensor ASC ECU malfunction External noise interference Wrong steering wheel is attached DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C l e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1219 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the DTC Check that the wheel speed sensor related G and yaw rate sensor related or steering wheel sensor related DTC is set Q Is the DTC set YES Troubleshoot the relevant DTC and then go to Step 8 NO Goto Step 4 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 199 STEP 4 Check how steering wheel sensor is installed Check that the steering wheel sensor is installed correctly
91. the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1219 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 200 DIAGNOSIS DTC C121A Abnormality in steering wheel sensor calibration A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the steering wheel sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 304 When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Steering wheel sensor stores the neutral position learned by scan tool When the neutral position has not been stored in the steering wheel sensor yet the steering wheel sensor outputs the signal indicating that it does not have neutral position DTC SET CONDITIONS This DTC is set when ASC ECU detects that the steering wheel sensor has not learned the neutral position yet PROBABLE CAUSES Neutral position of steering wheel sensor not learned Steering wheel sensor malfunction ASC ECU malfun
92. the wheel speed sensor ground terminal No 37 and the body ground OK 1 volt or less Check harness Q Is the check result normal YES Go to Step 6 MB991997 ASC ECU NO co at the terminal No 36 or No 37 Go to A 51 ASC ECU harness connector AC606869DC STEP 6 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool to ASC ECU 2 Measure the resistance between the wheel speed sensor power supply terminal signal terminal No 36 and the body ground and between the wheel speed sensor ground terminal No 37 and the body ground OK No continuity Q Is the check result normal Check harness YES Go to Step 7 NO Not normal at the terminal No 36 or No 37 Go to MB991997 ASC ECU Step 8 A 51 ASC ECU harness connector AC606869DD TSB Revision MB991997 A 51 ASC ECU harness connector ACTIVE STABILITY CONTROL SYSTEM ASC 35C 45 Check harness ASC ECU AC606870BN DIAGNOSIS STEP 7 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the ASC ECU side connector and harness side connector and t
93. to Step 4 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 181 DIAGNOSIS STEP 4 Check the wheel speed sensor related DTC Use the scan tool to check whether the wheel speed sen sor related DTC is set or not Q Is the DTC set YES Troubleshoot for the relevant DTC Refer to P 35C 27 NO Goto Step 5 STEP 5 Using scan tool MB991958 check the data list Check the following service data under curb weight condition or one occupant driver only in the vehicle on a flat road Refer to P 35C 291 e Item 09 G sensor tem 96 G sensor offset Q Is the check result normal YES Turn the ignition switch to the ON from OFF position Then go to Step 9 NO Goto Step 6 STEP 6 G and yaw rate sensor check Check that the G and yaw rate sensor is installed correctly Q Is the check result normal YES Go to Step 7 NO Reinstall the G and yaw rate sensor correctly Refer to P 35C 320 and then go to Step 10 STEP 7 Connector check A 51 ASC ECU connector C 137 G and yaw rate sensor connector Q Is the check result normal YES Go to Step 8 NO Repair the connector and then go to Step 10 STEP 8 Wiring harness check between A 51 ASC ECU connector terminal No 18 and C 137 G and yaw rate sensor connector terminal No 2 as well as between A 51 ASC ECU connector terminal No 19 and C 137 G and yaw rate sensor connector terminal No 3 Check the communication circuit for o
94. turning off the brake warning display according to the signal from ASC ECU Informs the driver of the system status by flashing when the system operates according to the signal from ASC ECU ASC OFF display Informs the driver of the system shutdown by illuminating by the signal from ASC ECU Informs the driver that the brake system overheats and the TCL control brake control only is disabled by flashing the ASC OFF display at a frequency of approximately 2 Hz ASC warning display and light 3 TCL function and stability control function HSA function use the same display and light 9 Depending on the signal from ASC ECU the ASC warning display and light informs the driver of the system status by illuminating when the system has malfunction When the ASC warning display and light is illuminated the HSA function does not operate TSB Revision 35C 6 ACTIVE STABILITY CONTROL SYSTEM ASC Name of part GENERAL INFORMATION Functional description Actuator Data link connector Sets the diagnostic trouble code and establishes the communication with scan tool Engine control module ECM Controls the engine output based on the signal from ASC ECU TCM TCM performs integrated control with ASC ECU Output the gear position to ASC ECU TC SST ECU TC SST ECU performs integrated control with ASC ECU Outputs the gear position to ASC ECU AWC ECU Outputs the
95. use Troubleshooting Inspec tion Service Points How to Cope with Intermit tent Malfunctions P 00 13 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 11 DIAGNOSIS ABS WARNING LIGHT ASC WARNING OPERATION LIGHT AND BRAKE WARNING LIGHT CHECK Check that ABS and brake warning light ASC warning opera tion light illuminate as follows NOTE The brake warning light is used as a warning light for parking brake brake fluid level and EBD control Brake warning light Vehicles for USA w se Brake warning light 7 Vehicles for CANADA ABS warning light RG aa 3 P Nr UE ASC warning n 2 operation light I P f VZ eta liquid A AX crystal display Tr M1352012001060 1 When the ignition switch is turned to the ON position ABS and brake warning light ASC warning operation light illuminate 2 The ABS and brake warning light ASC warning operation light illuminate for three seconds and then turn OFF Otherwise check the diagnostic trouble code NOTE e 1 The ABS warning light may stay ON until the vehicle speed reaches 10 km h As far as ABS ECU stores any diagnostic trouble code related to the wheel speed sensor malfunction or the motor malfunction as past trouble ABS ECU continues illuminating the ABS warning light until Approximately 3s ABS warning mm light Brake Illuminated warning light Not e illuminated AC901746AB
96. wheel speed sensor circuit P 35C 47 Abnormality in FL wheel speed sensor signal P 35C 53 Abnormality in FR wheel speed sensor signal P 35C 60 Abnormality in RL wheel speed sensor signal P 35C 67 Abnormality in RR wheel speed sensor signal P 35C 75 Mutual monitoring of FL wheel speed sensor P 35C 82 Mutual monitoring of FR wheel speed sensor P 35C 86 Mutual monitoring of RL wheel speed sensor P 35C 89 Mutual monitoring of RR wheel speed sensor P 35C 93 Abnormality in periodical signal for FL wheel speed sensor P 35C 96 Abnormality in periodical signal for FR wheel speed sensor P 35C 99 Abnormality in periodical signal for RL wheel speed sensor P 35C 101 Abnormality in periodical signal for RR wheel speed sensor FL wheel speed sensor control phase time exceeded P 35C 104 P 35C 107 FR wheel speed sensor control phase time exceeded RL wheel speed sensor control phase time exceeded P 35C 113 P 35C 119 RR wheel speed sensor control phase time exceeded P 35C 126 Abnormality in FL wheel inlet valve system Abnormality in FR wheel inlet valve system Abnormality in RL wheel inlet valve system Abnormality in RR wheel inlet valve system Abnormality in FL wheel outlet valve system Abnormality in FR wheel outlet valve system Abnormality in RL wheel outlet valve system Abnormality in RR wheel outlet valve system
97. 0 M U T III Main Harness A STEP 1 Check the wheels and the tires Carry out the following check Size check of wheels and tires Tire wear and deterioration statuses e Check the tire pressure NOTE For the tire pressure refer to the tire pressure label attached to the lower section of driver s side door striker Q Is the check result normal YES Go to Step 2 NO Correct the wheels and tires in good condition Then go to Step 9 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 278 DIAGNOSIS STEP 2 Diagnostic trouble code check Use scan tool MB991958 to check the diagnostic trouble code for the ASC system Refer to P 35C 27 Q Is the check result normal YES Go to Step 3 NO Carry out the diagnosis for the diagnostic trouble code Refer to P 35C 27 Then go to Step 9 STEP 3 Check of brake system related components other than hydraulic unit integrated with ABS ECU At the same time with the following checks also check that no parts other than the genuine parts are mounted Brake pad check Refer to GROUP 35A On vehicle Ser vice Brake Pad Check P 35A 20 Brake disk runout check Refer to GROUP 35A On vehicle Service Brake Disk Rotor Check P 35A 27 Brake drag force check Refer to GROUP 35A On vehicle Service Brake Drag Force Check P 35A 30 Q Is the check result normal YES Go to Step 4 NO Repair or replace the part s having damage or other problems Then go to
98. 104 set YES Return to Step 1 NO The procedure is complete DTC C1073 Faulty motor drive circuit DTC C2116 Low or high power supply voltage in pump motor Solenoid Valve and Motor Power Supply Circuit HYDRAULIC UNIT FUSIBLE FUSIBLE LINKC LINKG9 SOLENOID VALVE MOTOR Lu g Lu e ea 32 1 Y y y Y SOLENOID SOLENOID MOTOR VALVE VALVE GR Ge GR RR GR 9 GR GR GR GR O8 R power d POWER POWER m 7 m 77 m 77 m A Um 7 TMT 757 TM SUPPLY SUPPLY SUPPLY MOTOR POWER SUPPLY a un V ASC ECU 16 4 A 51 x x OCCCCTOOCLTEETE 9 lt 3 3 R x 0X18 19000 0020304090060 00809808 lt L a ea G3626566 6869000 DADAM DAMD W9H35M004A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 140 DIAGNOSIS Connector A 51 Ies AC802869AC A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304
99. 114 When the power supply voltage applied from ASC ECU to the G and yaw rate sensor is not within the standard value range low voltage 6 5 0 5 V or less DTC C2115 When the power supply voltage applied from ASC ECU to the G and yaw rate sensor is not within the standard value range high voltage 18 0 1 0 V or more PROBABLE CAUSES Wiring harness or connector failure for the special CAN bus lines between ASC ECU and the G and yaw rate sensor e Damaged wiring harness and connectors Gand yaw rate sensor malfunction ASC ECU malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnosis table P 54C 16 On completion go to Step 2 STEP 2 Using scan tool MB991958 check the DTC Check that the DTC U0125 is set in ASC ECU Q Is DTC U0125 set YES Troubleshoot for the DTC Refer to P 35C 221 Then go to Step 3 NO Goto Step 3 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 193 STEP 3 DTC recheck Drive the vehicle at 12 mph 20 km h or more Q Is DTC C2114 or C2115 set YES Go to Step
100. 13 STEP 6 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1042 set YES Return to Step 1 NO The procedure is complete DTC C1043 Abnormality in periodical signal for RL wheel speed sensor A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed
101. 35A 16 Q Is the check result normal YES Go to Step 5 NO Install the stoplight switch correctly Refer to GROUP 35A Brake Pedal P 35A 31 Then go to Step 7 STEP 5 Brake booster check Refer to GROUP 35A On vehicle Service P 35A 16 Q Is the check result normal YES Go to Step 6 NO Replace the brake booster Refer to GROUP 35A Master Cylinder Assembly and Brake Booster Assembly P 35A 37 lt FWD gt P 35A 34 lt AWD gt go to Step 7 TSB Revision 35C 146 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS STEP 6 Check whether the DTC is reset Q Is DTC C121D set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 7 NO The trouble can be an intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 7 Check whether the DTC is reset Q Is DTC C121D set YES Return to Step 1 NO The procedure is complete DTC C121E Abnormality in brake fluid pressure sensor output signal N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor a
102. 35C 1 GROUP 35C ACTIVE STABILITY CONTROL SYSTEM ASC CONTENTS GENERAL INFORMATION 35C 3 SPECIAL TOOLS 35C 298 SERVICE SPECIFICATIONS 35C 10 ON VEHICLE SERVICE 35C 299 HYDRAULIC UNIT CHECK 35C 299 DIAGNOSIS 35C 10 IN THE EVENT OF A DISCHARGED INTRODUCTION TO ASC DIAGNOSIS 35C 10 BATTERY 42 cata da x Eee 35C 302 ASC DIAGNOSTIC TROUBLESHOOTING ALL SENSOR CALIBRATION G AND YAW STRATEGY 00000 cece enna 35C 10 RATE SENSOR STEERING WHEEL SENSOR ABS WARNING LIGHT ASC WARNING OPERATION LIGHT AND BRAKE WARNING LIGHT CHECK 0 35C 11 DIAGNOSTIC FUNCTION 35C 11 DIAGNOSTIC TROUBLE CODE CHART 35C 27 DIAGNOSTIC TROUBLE CODE PROCEDURES 35C 30 SYMPTOM CHART 35C 238 SYMPTOM PROCEDURES 35C 239 DATA LIST REFERENCE TABLE 35C 291 ACTUATOR TEST REFERENCE TABLE 35C 294 CHECK AT ECU TERMINALS 35C 295 BRAKE FLUID PRESSURE SENSOR 35C 302 G AND YAW RATE SENSOR CALIBRATION 0 5 35C 302 STEERING WHEEL SENSOR CALIBRATION 0 35C 304 BRAKE FLUID PRESSURE SENSOR CALIBRATION 0 5 35C 308 Continued on next page WARNINGS REGARDING SERVICING OF SUPPLEMENTAL RESTRAINT SYSTEM SRS EQUIPPED VEHICLES A WARNING Improper service or maintenance of any component of the SR
103. 35C 320 STEERING WHEEL SENSOR 35C 321 REMOVAL AND INSTALLATION 35C 321 ACTIVE STABILITY CONTROL SYSTEM ASC 35C 3 GENERAL INFORMATION GENERAL INFORMATION Active Stability Control System ASC has been installed The ASC system integrates the traction control TCL function and skid control function When TCL detects the slip of the driving wheel ex during startup on low u road it automatically applies the brakes to the slipping driving wheel At the same time TCL reduces the engine output and prevents the wheel spin when it determines that the engine torque is too high for the road sur face u When the ASC ECU determines that the vehicle is in a dangerous condition it reduces the engine output and applies brake force to four wheels independently to control the vehicle behavior avoiding the critical state M1355000200256 ASC has been added to the transmission twin clutch sport shift transmission TC SST 1 gt and active center differential ACD control and the controls are integrated to improve the vehicle sta bility Vehicles with AWD gt Hill Start Assist HSA function has been adopted to hold and prevent the roll back of the vehicle when the vehicle is on a slope and the foot is transferred from the brake pedal to the accelera tor pedal Vehicles with HSA gt NOTE e 1 For the details on twin clutch sport shift trans mission TC SST 2 For the details on active c
104. 4 NO The procedure is complete STEP 4 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 tem 08 Lateral G sensor tem 09 G sensor tem 12 Yaw rate sensor Q Is the check result normal YES Go to Step 12 NO GotoStep 5 STEP 5 Connector check A 51 ASC ECU connector C 137 G and yaw rate sensor connector Q Is the check result normal YES Go to Step 6 NO Repair the connector and then go to Step 13 STEP 6 Wiring harness check between A 51 ASC ECU connector terminal No 18 and C 137 G and yaw rate sensor connector terminal No 2 as well as between A 51 ASC ECU connector terminal No 19 and C 137 G and yaw rate sensor connector terminal No 3 Check the communication circuit for open and short circuit Q Is the check result normal YES Go to Step 7 NO Repair the wiring harness and then go to Step 13 STEP 7 G and yaw rate sensor installation check Check that the G and yaw rate sensor is installed correctly Q Is the check result normal YES Go to Step 8 NO Reinstall the G and yaw rate sensor correctly Refer to P 35C 320 and then go to Step 13 STEP 8 Voltage measurement at C 137 G and yaw rate sensor connector 1 Disconnect the C 137 G and yaw rate sensor connector 2 Turn the ignition switch to the ON position 3 Measure the voltage at the harness side between the terminal No 1 and the body ground OK 6 5 18 volt Q I
105. 58 always turn the ignition switch to the LOCK OFF position before con necting or disconnecting scan tool MB991958 NOTE If the battery voltage is low diagnostic trouble codes will not be set Check the battery if scan tool MB991958 does not display 1 Connect scan tool MB991958 to the data link connector 2 Turn the ignition switch to the ON position 3 Select System Select 4 Select ABS ASC ASTC WSS from the system list and select the OK button Select Diagnostic Trouble Code to read the DTC Ifa DTC is set it is shown 7 Choose DTC erase to erase the DTC C1 Oo MB991827 AC608435 AB HOW TO READ DATA LIST Required Special Tools e MB991958 Scan Tool M U T IIl Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A A CAUTION To prevent damage to scan tool MB991958 always turn the ignition switch to the LOCK OFF position before con necting or disconnecting scan tool MB991958 1 Connect scan tool MB991958 to the data link connector 2 Turn the ignition switch to the ON position 3 Select System Select 4 Select ABS ASC ASTC WSS from the system list and select the OK button 5 Select Data List MB991827 AC608435 AB TSB Revision 35C 26 ACTIVE STABILITY CONTROL S
106. 5C 304 and P 35C 308 OPERATION ASC ECU sends the illumination request signal of ASC OFF display or ASC OFF light to the combination meter through ETACS ECU via CAN communication By the operation of ASC OFF switch the ASC OFF display or ASC OFF light illuminates when the ASC function is stopped When the ASC OFF switch is pressed for 3 seconds or more the ASC system turns OFF When the ASC OFF switch is pressed for 15 seconds or more the ASC is kept in ON state and the system cannot be turned OFF until the ignition switch is turned to the ON position next time COMMENTS ON TROUBLE SYMPTOM This may be caused by faults in the CAN bus line ETACS ECU combination meter or ASC ECU PROBABLE CAUSES Damaged wiring harness and connectors Malfunction of ETACS ECU Combination meter malfunction ASC ECU malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostics table P 54C 16 Then go to Step 10 TSB Revision s ACTIVE STABILITY CONTROL SYSTEM ASC 35C 258 DIAGNOSIS STEP 2 Using scan tool MB991958 ch
107. 5C 320 and then go to Step 12 NO Repair the wiring harness between A 51 ASC ECU connector terminal No 29 and C 137 G and yaw rate sensor connector terminal No 5 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 195 STEP 12 Check whether the DTC is reset Drive the vehicle at 12 mph 20 km h or more Q Is DTC C2114 or C2115 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 13 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 13 Check whether the DTC is reset Drive the vehicle at 12 mph 20 km h or more Q Is DTC C2114 or C2115 set YES Return to Step 1 NO The procedure is complete DTC C123A Abnormality in sensor calibration A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal Do not drop or shock the G and yaw rate sensor When the steering wheel sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 304 When the G and yaw rate sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 302 When the hydraulic unit integrated with ASC ECU is repl
108. 5C 82 DIAGNOSIS STEP 15 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1032 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 16 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 16 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1032 set YES Return to Step 1 NO The procedure is complete DTC C1014 Mutual monitoring of FL wheel speed sensor N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on w
109. 606870BO DIAGNOSIS STEP 12 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the ASC ECU side connector and harness side connector and then measure the voltage at the special tool connector side 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 43 and body ground and between the ground terminal No 42 and body ground OK Terminal No 43 and body ground Battery posi tive voltage Terminal No 42 and body ground 1 volt or less Q Is the check result normal YES Go to Step 13 NO Goto Step 15 STEP 13 Connector check A 51 ASC ECU connector C 39 intermediate connector D 11 intermediate connector F 02 wheel speed sensor lt RR gt connector Q Is the check result normal YES Go to Step 14 NO Repair the defective connector Then go to Step 16 STEP 14 Wiring harness check between A 51 ASC ECU connector terminal No 43 and F 02 wheel speed sensor RR connector terminal No 1 and between A 51 ASC ECU connector terminal No 42 and F 02 wheel speed sensor RR connector terminal No 2 e Check for open circuit in wheel speed sensor lt RR gt circuit Q Is the check result normal YES Go to Step 15 NO Repair the wiring harness Then go to Step 16 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 3
110. 802706BD TSB Revision 35C 120 ACTIVE STABILITY CONTROL SYSTEM ASC Connector D 15 AC807570AJ DIAGNOSIS Connector F 21 AC807572 BE A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS This DTC is set if any malfunction below is found When the brake fluid pressure is decreased for a long time When the brake fluid pressure is held for a long time NOTE AS
111. 824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 Check whether the DTC is reset Q Is DTC C1395 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 NO The procedure is complete TSB Revision Z ACTIVE STABILITY CONTROL SYSTEM ASC 35C 204 DIAGNOSIS DTC C2002 Valve calibration not completed A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Perform the master cylinder pressure sensor calibration to store the calibrated value in the ASC ECU At the same time the calibrated value of cut valve and inlet valve are stored DTC SET CONDITIONS This DTC is set when the calibra
112. 91997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the resistance between the wheel speed sensor power supply terminal signal terminal No 36 and the body ground and between the wheel speed sensor ground terminal No 37 and the body ground OK No continuity Check harness Q Is the check result normal YES Go to Step 12 NO Not normal at the terminal No 36 or No 37 Go to MB991997 ASC ECU Step 10 A 51 ASC ECU harness connector AC606869DD STEP 10 Connector check A 51 ASC ECU connector C 39 intermediate connector D 15 intermediate connector F 21 wheel speed sensor lt RL gt connector Q Is the check result normal YES Go to Step 11 NO Repair the defective connector Then go to Step 16 STEP 11 Wiring harness check between A 51 ASC ECU connector terminal No 36 and F 21 wheel speed sensor lt RL gt connector terminal No 1 and between A 51 ASC ECU connector terminal No 37 and F 21 wheel speed sensor lt RL gt connector terminal No 2 Check for short circuit in wheel speed sensor lt RL gt circuit Q Is the check result normal YES Go to Step 15 NO Repair the wiring harness Then go to Step 16 TSB Revision MB991997 A 51 ASC ECU harness connector ACTIVE STABILITY CONTROL SYST
113. ASC ECU connector or the battery ter minal when the ignition switch is ON Loose battery terminal Abnormality in battery Damaged wiring harness and connectors ASC ECU malfunction TSB Revision s ACTIVE STABILITY CONTROL SYSTEM ASC 35C 214 DIAGNOSIS DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose the CAN bus line Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostics table P 54C 9 On completion and then go to Step 2 STEP 2 Diagnostic trouble code recheck after resetting CAN bus lines Q Is DTC C1608 set YES Go to Step 3 NO The procedure is complete STEP 3 Battery check Refer to GROUP 544A Battery Test P 54A 8 Q Is the battery in good condition YES Go to Step 5 NO Goto Step 4 STEP 4 Charging system check Refer to GROUP 16 Output Current Test P 16 9 Q Is the charging system in good condition YES Replace the battery Then go to Step 11 NO Repair or replace the charging system component s TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 215 Check harness MB991997 ASC ECU A 51 ASC ECU harness connect
114. B Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 259 STEP 7 Using scan tool MB991958 check the DTC for other systems Using scan tool check that DTC U0141 is not set by the combi nation meter system Q Is the DTC set YES Diagnose the combination meter Refer to GROUP 54A Combination Meter Troubleshooting P 54A 55 Then go to Step 10 NO Goto Step 8 STEP 8 Using scan tool MB991958 check the DTC for other systems Using scan tool check that DTC U0121 is not set by the ETACS system Q Is the DTC set YES Perform troubleshooting on ETACS ECU Refer to GROUP 54A ETACS Troubleshooting P 54A 683 Then go to Step 9 NO Goto Step 9 STEP 9 Retest the system Q Does ASC OFF display turn OFF normally YES Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 NO Replace the hydraulic unit integrated with ASC ECU Refer to P 35C 311 Then go to Step 10 STEP 10 Retest the system Q Does ASC OFF display turn OFF normally YES The procedure is complete NO Return to Step 1 TSB Revision s ACTIVE STABILITY CONTROL SYSTEM ASC 35C 260 DIAGNOSIS Inspection Procedure 9 The skid control TCL system cannot be disabled when ASC OFF switch is pressed for 3 seconds or more to turn the system OFF ETACS ECU 6 313 1 2 34 5 6 7 8 9 1011 12 13 1415 16
115. B991997 ASC ECU NO s didus at the terminal No 43 or No 42 Go to ep 9 A 51 ASC ECU harness connector AC606869DF STEP 8 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the ASC ECU side connector and harness side connector and then measure the voltage at the special tool connector side 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 43 and body ground and between the ground terminal No 42 and body ground OK Terminal No 43 and body ground Battery posi tive voltage Terminal No 42 and body ground 1 volt or less Check harness Q Is the check result normal MB991997 ASC ECU YES Go to Step 9 NO Go to Step 14 A 51 ASC ECU harness connector AC606870BO TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 1 31 STEP 9 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 10 NO Replace the wheel speed sensor lt RR gt Refer to P 35C 316 Then go to Step 15 STEP 10 Wiring harness check between A 51 ASC ECU connector terminal No 43 and F 02 wheel speed sensor lt RR gt connector terminal No 1 and between A 51 ASC ECU connector terminal No 42 and F 02 wheel speed sensor lt RR gt co
116. C 35C 180 DIAGNOSIS OPERATION ABS ECU monitors if the output of G and yaw rate sensor is normal or not DTC SET CONDITIONS This DTC is set when the abnormality is detected by comparing the longitudinal G sensor value output from the G and yaw rate sensor with the value output from the wheel speed sensor PROBABLE CAUSES Wiring harness or connector failure for the special CAN bus lines between ASC ECU and the G and yaw rate sensor Improper installation of the G and yaw rate sensor G and yaw rate sensor malfunction Malfunction of wheel speed sensor ASC ECU malfunction External noise interference NOTE When rotated on the four wheel drum tester this DTC may be set DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 Using scan tool MB991958 check the DTC Check that the DTC U0125 is set in ASC ECU Q Is DTC U0125 set YES Troubleshoot for the DTC Refer to P 35C 221 Then go to Step 3 NO Goto Step 3 STEP 3 DTC recheck after resetting CAN bus lines Q Is DTC C1242 set YES Go
117. C OK Not present Q Is the check result normal YES Go to Step 6 NO Replace the ETACS ECU Refer to GROUP 54A ETACS ECU P 54A 769 STEP 6 Check part number of ETACS ECU Check the part number of ETACS ECU Q Is the check result normal YES Go to Step 7 NO Replace the ETACS ECU Refer to GROUP 54A ETACS ECU P 54A 769 and then go to Step 8 STEP 7 Check whether the DTC is reset Q Is DTC C2003 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 8 NO The trouble can be an intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 TSB Revision 35C 208 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS STEP 8 Check whether the DTC is reset Q Is DTC C2003 set YES Return to Step 1 NO The procedure is complete DTC C2003 Control parameter not implement lt AWD gt A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines If DTC C2003 is set in ASC ECU always diagnose the CAN bus line If there is any fault in the CAN bus lines an incorrect DTC may be set In this case the set DTC is not highly reliable Before replacing the ECU
118. C 302 P 35C 304 and P 35C 308 COMMENTS ON TROUBLE SYMPTOM A failure may have occurred in the calibration or the G and yaw rate sensor e Some drivers mistake a brake dragging for HSA operation fthe suspension is modified the vehicle posture changes and the ASC ECU judges that the vehicle is on a steep slope and may activate HSA PROBABLE CAUSES Improper installation of the G and yaw rate sensor Gand yaw rate sensor malfunction e ASC ECU malfunction Brake drag Damaged wiring harness and connectors DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 HSA operation check Check if the HSA works on a flat road with one occupant driver only in the vehicle Q Does the HSA work on a flat road YES Go to Step 2 NO This diagnosis is complete STEP 2 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 tem 09 G sensor Q Is the check result normal YES Go to Step 5 NO Goto Step 3 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 290 DIAGNOSIS STEP 3 G and yaw rate sensor installation check Check that the G and yaw rate sensor is installed correctly Q Is the check result normal YES Carry out the calibration of the G and yaw rate sensor Refer to P 35C 302 The
119. C ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 219 DIAGNOSIS DTC SET CONDITIONS This DTC is set if ASC ECU cannot receive the signal sent from other ECU for a certain period OPERATION ASC ECU communicates with the engine control module ECM TCM or TC SST ECU the steering wheel sensor ETACS ECU and AWC ECU via the CAN bus lines PROBABLE CAUSES DTC U0100 Wiring harness or connector failure of CAN bus line Engine control module ECM malfunction ASC ECU malfunction DTC U0101 Wiring harness or connector failure of CAN bus line TCM or TC SST ECU malfunction ASC ECU malfunction DTC U0126 Wiring harness or connector failure of CAN bus line Steering wheel sensor malfunction ASC ECU malfunction DTC U0141 Wiring harness or connector failure of CAN bus line Malfunction of ETACS ECU ASC ECU malfunction DTC U0114 Wiring harness or connector failure of CAN bus line Malfunction of AWC ECU ASC ECU malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use sc
120. C controls the vehicle based on the wheel speed sig nal When the brake fluid pressure is decreased or held for an abnormally long time the wheel speed sensor signal may have a problem PROBABLE CAUSES Damaged wiring harness and connectors External noise interference Malfunction of wheel speed sensor ASC ECU malfunction Excessive gap between the wheel speed sensor and the wheel speed detection encoder TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 121 DIAGNOSIS Adhesion of foreign materials on the wheel speed sensor Adhesion of foreign materials on the wheel speed detection encoder Wheel bearing malfunction Improper installation of the wheel speed sensor Deformation of the wheel speed detection encoder Disturbance of magnetization pattern for wheel speed detection encoder Missing teeth of the wheel speed detection encoder DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1048 se
121. C is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1073 or C2116 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 11 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 11 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1073 or C2116 set YES Return to Step 1 NO The procedure is complete DTC C121D Abnormality in brake fluid pressure sensor circuit N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION The hydraulic sensor is incorporated in the hydraulic unit When the brake pedal is depressed the pressure sensor detects the
122. C2003 is set in ASC ECU always diagnose the CAN bus line If there is any fault in the CAN bus lines an incorrect DTC may be set In this case the set DTC is not highly reliable Before replacing the ECU ensure that the communica tion circuit is normal When DTC C2003 is set in ASC ECU the DTC may also be set in ETACS ECU When the DTC is set in ETACS ECU carry out the diagnosis of the DTC for ETACS ECU first When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU receives the vehicle information stored in the ETACS ECU via CAN bus lines DTC SET CONDITIONS When received unset coding data from the ETACS ECU this DTC is set PROBABLE CAUSES Malfunction of ETACS ECU Engine control module ECM malfunction ETACS ECUS have been interchanged between two vehi cles ASC ECU malfunction ASC ECUS have been interchanged between two vehicles ETACS ECU or ASC ECU installation error Malfunction of ETACS ECU coding data TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 206 DIAGNOSIS DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan t
123. C606869FS DIAGNOSIS STEP 6 Fusible link check Check the fusible link No 26 Visually check for open circuit in the fusible link No 26 Q Is the check result normal YES Go to Step 8 NO Go to Step 7 STEP 7 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Disconnect the fusible link No 26 3 Measure the resistance between the terminal No 1 and the body ground OK No continuity Q Is the check result normal YES Replace the fusible link No 26 Then go to Step 11 NO The short circuit may be present in the power supply circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 1 and the fusible link No 26 and then replace the fusible link No 26 Then go to Step 11 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 143 Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869DI Check harness u 3 ASC ECU A 51 ASC ECU harness connector AC606869DH DIAGNOSIS STEP 8 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC ch
124. Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the wheel bearing FR for looseness Refer to GROUP 26 On vehicle Service P 26 10 Q Is the check result normal YES Go to Step 4 NO Replace the wheel bearing Refer to GROUP 26 Front axle hub assembly P 26 16 STEP 4 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 5 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction When the encoder is deformed replace the wheel bearing NO Deformation Replace the wheel bearing Refer to GROUP 26 Front axle hub assembly P 26 16 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 101 DIAGNOSIS STEP 5 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1042 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 6 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00
125. Check the Rear wheel hub assembly RR FWD gt Refer to GROUP 27A On vehicle Service P 27A 5 e Check the wheel bearing RR AWD gt for looseness Refer to GROUP 27B On vehicle Service P 27B 17 Q Is the check result normal YES Go to Step 7 NO FWD Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 NO AWD Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 STEP 7 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 8 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction NO lt Deformation FWD gt Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 NO lt Deformation AWD gt Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 96 DIAGNOSIS STEP 8 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1035 set YES Replace the hydraulic unit ASC ECU Ref
126. Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C100A set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 11 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 11 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C100A set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 36 DIAGNOSIS DTC C1015 Abnormality in FR wheel speed sensor circuit Wheel Speed Sensor Circuit PINK WHITE Ba oO sIep7I8 ITJHEEEE CHEESE RE E PR LI YELLOW SKY BLUE VIOLET GREEN PINK WHITE N e gt en eo ND e 4 O d 9 Konza 4 O s5 6 7 8 9 ATT 16 1 71 8r 2921 22 p eo heh IND x Al PINK WHITE RED BLACK O C
127. EM ASC DIAGNOSIS 35C 55 Past trouble e When DTC C100A is also set carry out diagnosis with par ticular emphasis on wiring harness and connector failures between ASC ECU and the wheel speed sensor For diag nosis procedures refer to How to treat past trouble GROUP 00 How to Cope with Intermittent Malfunction P 00 13 e When DTC C100A is not set the following conditions may be present e Some wheels slip Unstable vehicle attitude External noise interference Vehicle ran with the parking brake applied DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C 1 e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1011 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the DTC Check that DTC C100A is also set Q Is DTC C100A also set YES Perform the diagnosis for DTC C100A Refer to P 35C 30 NO Goto Step 4 STEP 4 Check for wheel speed sensor installation Check how the wheel speed sensor FL is installed D
128. EM ASC 35C 73 Check harness ASC ECU AC606870BN DIAGNOSIS STEP 12 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the ASC ECU side connector and harness side connector and then measure the voltage at the special tool connector side 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 36 and body ground and between the ground terminal No 37 and body ground OK Terminal No 36 and body ground Battery posi tive voltage Terminal No 37 and body ground 1 volt or less Q Is the check result normal YES Go to Step 13 NO Goto Step 15 STEP 13 Connector check A 51 ASC ECU connector C 39 intermediate connector D 15 intermediate connector F 21 wheel speed sensor lt RL gt connector Q Is the check result normal YES Go to Step 14 NO Repair the defective connector Then go to Step 16 STEP 14 Wiring harness check between A 51 ASC ECU connector terminal No 36 and F 21 wheel speed sensor lt RL gt connector terminal No 1 and between A 51 ASC ECU connector terminal No 37 and F 21 wheel speed sensor lt RL gt connector terminal No 2 e Check for open circuit in wheel speed sensor lt RL gt circuit Q Is the check result normal YES Go to Step 15 NO Repair the wiring harness Then go to Step
129. EP 16 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1011 set YES Return to Step 1 NO The procedure is complete TSB Revision a ACTIVE STABILITY CONTROL SYSTEM ASC 35C 60 DIAGNOSIS Code No C101C Abnormality in FR wheel speed sensor signal Wheel Speed Sensor Circuit PINK WHITE Ba oO sIep7I8 ITJHEEEE CHEESE RE E PR LI YELLOW SKY BLUE VIOLET GREEN PINK WHITE N e gt en eo ND e TO m 9 1011121314131 4 O s5 6 7 8 9 ATT 16 1 71 8r 2921 22 p eo heh IND x Al PINK WHITE RED BLACK O C 9 9 LH A 07 RH A 02 LH r 2i RH F 02 9 FRONT WHEEL SPEED SENSOR REAR WHEEL SPEED SENSOR WAS35M000A Connectors A 02 A 51 AC802869AD TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 61 DIAGNOSIS A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to th
130. ETACS ECU Malfunction of engine control module ECM e ETACS ECUS have been interchanged between two vehi cles Malfunction of ASC ECU External noise interference e ASC ECUS have been interchanged between two vehicles DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C l e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 232 DIAGNOSIS STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC U1417 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 other system diagnostic trouble code Use scan tool to check whether any diagnostic trouble code related to vehicles information is set or not by the ETACS ECU or engine control module ECM Q Is the DTC set YES Troubleshoot for the relevant DTC NO Go to Step 4 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 233 STEP 4 ETACS ECU coding data check Refer to GROUP 00 Coding List P 00 28 Vehicle line OK LANCER H B Transmission OK 5M T
131. GROUP 54A Combination Meter Actuator Test Table P 54A 100 Vehicles without color liquid crystal dis play or P 54A 100 Vehicles with color liquid crystal display gt Item No 13 Indicator 4 Q Is the check result normal YES Go to Step 4 NO Replace the combination meter Refer to GROUP 54A Combination Meter P 54A 124 Then go to Step 8 STEP 4 Check the ASC ECU power supply circuit system Refer to P 35C 266 Q Is the check result normal YES Go to Step 5 NO Diagnose the power supply circuit of the ASC ECU Refer to P 35C 266 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 255 STEP 5 Using scan tool MB991958 check the other system DTC Using scan tool check that DTC U0141 is not set by the combi nation meter system Q Is the DTC set YES Diagnose the combination meter Refer to GROUP 54A Combination Meter Troubleshooting P 54A 55 Then go to Step 8 NO GotoStep 6 STEP 6 Using scan tool MB991958 check the other system DTC Using scan tool check that DTC U0121 is not set by the ETACS system Q Is the DTC set YES Perform troubleshooting on ETACS ECU Refer to GROUP 54A ETACS Troubleshooting P 54A 683 Then go to Step 8 NO Go to Step 7 STEP 7 Retest the system Q Does the ASC warning display and light turn ON and OFF normally YES Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 NO R
132. IS STEP 6 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool to ASC ECU 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 45 and the body ground and between the ground terminal No 46 and the body ground OK 1 volt or less Check harness Q Is the check result normal YES Go to Step 7 NO Not normal at the terminal No 45 or No 46 Go to MB991997 ASC ECU Step 9 A 51 ASC ECU harness connector AC606869CY STEP 7 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the resistance between the wheel speed sensor power supply terminal signal terminal No 45 and the body ground and between the wheel speed sensor ground terminal No 46 and the body ground OK No continuity Check harness Q Is the check result normal YES Go to Step 8 MB991997 ASC ECU NO Not normal at the term
133. K WHITE P sIep7I8 ITJHEEEE CHEESE RE E PR LI YELLOW SKY BLUE VIOLET GREEN PINK WHITE N e gt en eo ND e 4 O d 9 Konza 4 O s5 6 7 8 9 ATT 16 1 71 8r 2921 22 p eo heh IND x Al PINK WHITE RED BLACK O C D 9 LH A 07 RH A 02 LH r 2i RH F 02 9 FRONT WHEEL SPEED SENSOR REAR WHEEL SPEED SENSOR WAS35M000A Connector A 51 Connector C 39 AC802706BD TSB Revision 35C 42 ACTIVE STABILITY CONTROL SYSTEM ASC Connector D 15 AC807570AJ DIAGNOSIS Connector F 21 AC807572 BE A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Ea
134. L e SWITCH OFF ON A 06 CX BLACK BLACK 9 e 1 ssp 7 CAN DRIVE CIRCUIT CIRCUIT INTERFACE ETACS ECU 2 3 4 5 6 13 14 15 16 17 18 19 20 21 22 7 8 LE 23 24 GREEN PINK JOINT CONNECTOR CAN1 6 06 1314 15 2 3 4 5 6 7 8 9 10 11 16 17 18 19 20 21 2223 24 3 14 N E BRAKE CAN LCD FUEL WARNING TRANSCEIVER Y BRAKE OIL PRESSURE CIRCUIT CPU LED DRIVE CIRCUIT INTERFACE CIRCUIT z eu A6 5 C 21 1 4 S 5 e 7 8 9 10 11 12 13 14 15 16 17 18 19 20 PARKING BRAKE SWITCH N c 117 MU801211 p TSB Revision WAH35M002A 35C 242 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS Connectors C 21 C 117 Connector C 312 Junction block AC802706AC AC608152 AP A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Trouble code diagnosis P 54C 9 Whenever ECU is replaced ensure that the CAN bus lines are normal CIRCUIT OPERATION W
135. L SYSTEM ASC Item DIAGNOSIS EBD ABS Skid control TCL 35C 23 HSA AWC time out error Enabled Enabled Enabled Enabled Enabled G amp yaw rate sensor message time out error message error Enabled Enabled Prohibited 9 Prohibited Prohibited Prohibited Engine signal malfunction detected Enabled Enabled Prohibited Prohibited Prohibited Steering wheel sensor CRC message error Enabled Enabled Prohibited Prohibited Prohibited G amp yaw rate sensor bus off Enabled Enabled Prohibited Prohibited Prohibited Prohibited Variant coding not implemented Enabled Prohibited Prohibited Prohibited Prohibited NOTE 1 Variant coding value invalid includes faulty installation Enabled Prohibited 4 Turns on when two or more wheels are faulty Prohibited e This DTC is not set with the vehicle speed of 12 mph 20 km h or less e 2 Not prohibited when the brake warning light is not illuminated 4 Not prohibited when the ABS warning light is not illuminated 2 75 FWD e 6 AWD TSB Revision Prohibited Prohibited 35C 24 ACTIVE STABILITY CONTROL SYSTEM ASC MB991827 AC608435 AB DIAGNOSIS HOW TO CONNECT THE SCAN TOOL M U T III Required Special Tools e MB991958 Scan
136. MPTOM This may be caused by faults in the CAN bus line ETACS ECU combination meter or ASC ECU PROBABLE CAUSES e Damaged wiring harness and connectors e Malfunction of ETACS ECU Malfunction of the combination meter ASC ECU malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C l e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 Then go to Step Ta TSB Revision s ACTIVE STABILITY CONTROL SYSTEM ASC 35C 250 DIAGNOSIS STEP 2 Using scan tool MB991958 check the DTC Use scan tool to check the DTC for the ASC system Q Is the DTC set YES Carry out the diagnosis for the DTC Refer to P 35C 27 NO Goto Step 3 STEP 3 Actuator test of combination meter Perform the following actuator test by the combination meter system and check if the brake warning light illuminates Refer to GROUP 54A Combination Meter Actuator Test Table P 54A 100 Vehicles without color liquid crystal display or P 54A 100 Vehicles with color liquid crystal display Item No 07 Indicator 1 Q Is the check result normal YES Go to Step 4 NO Diagnose the combinatio
137. Malfunction of ETACS ECU ETACS ECUS have been interchanged between two vehi cles TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 167 DIAGNOSIS DIAGNOSIS STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 6 STEP 2 Using scan tool MB991958 check the DTC Check that the DTC U0100 U0101 U0126 or U0141 is set in ASC ECU Q Is the DTC set YES Troubleshoot for the relevant DTC Refer to P 35C 27 Then go to Step 6 NO Goto Step 3 STEP 3 Using scan tool MB991958 other system check the DTC Using scan tool check if the DTCs are set from the engine con trol module ECM TCM ETACS ECU and steering wheel sensor or not Q Is the DTC set YES Troubleshoot the relevant DTC and then go to Step 6 NO Goto Step 4 TSB Revision T ACTIVE STABILITY CONTROL SYSTEM ASC 35C 168 DIAGNOSIS STEP 4 ETACS ECU coding data check Refer to GROUP 00 Coding List P 00 28 Vehicle line OK LANCER H B Transmission OK lt 5MI T gt M T OK lt CVT gt CVT Engine type OK 2 4L D4 MPI VVT Engine power OK Normal Chassis type for A S C OK Type 4 Final drive OK Front Drive Transfer OK 2WD SAS OK Present 4WD AWD OK Not present TCM OK lt 5M T gt
138. NO Repair the brake drag and then go to Step 9 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 149 DIAGNOSIS STEP 7 Brake booster check Refer to GROUP 35A On vehicle Service P 35A 16 Q Is the check result normal YES Go to Step 8 NO Replace the brake booster Refer to GROUP 35A Master Cylinder Assembly and Brake Booster P 35A 37 lt FWD gt P 35A 34 lt AWD gt and then go to Step 9 STEP 8 Check whether the DTC is reset Q Is DTC C121E set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 9 NO The trouble can be an intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 9 Check whether the DTC is reset Q Is DTC C121E set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 150 DIAGNOSIS DTC C1000 Abnormality in stoplight switch circuit Stoplight Switch Circuit
139. NS for each ASC DTC that you are trying to reset ASC DIAGNOSTIC TROUBLESHOOTING STRATEGY Use these steps to plan your diagnostic strategy If you follow them carefully you will be sure that you have exhausted most of the possible ways to find an ASC fault 1 Gather information about the problem from the customer 2 Verify that the condition described by the customer exists 3 Check the vehicle for any ASC DTC 4 f you cannot verify the condition and there are no ASC DTCs the malfunction is intermittent Refer to GROUP 00 How to use Troubleshooting Inspection Service Points How to Cope with Intermittent Malfunctions P 00 13 5 If you can verify the condition but there are no ASC DTCs or the system cannot communicate with the scan tool check that the basic brake system is operating properly M1355000900170 f the basic brake system is not operating prop erly refer to the GROUP 35A Basic Brake Sys tem Diagnostic troubleshooting strategy P 35A 5 If the basic brake system is operating properly refer to P 35C 238 6 If there is an ASC DTC record the number of the DTC then erase the DTC from the memory using the scan tool 7 Recreate the ASC DTC set conditions to see if the same ASC DTC will set again If the same ASC DTC sets again perform the diagnostic procedures for the DTC Refer to P 35C 27 If you cannot get the same ASC DTC to set again the malfunction is intermittent Refer to GROUP 00 How to
140. No 1 and the fusible link No 26 Then go to Step 20 NO Goto Step 9 STEP 9 Resistance measurement at A 51 ASC ECU connector 1 Removal the fusible link No 26 2 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 3 Measure the resistance between the terminal No 1 and the body ground OK No continuity Q Is the check result normal YES Replace the fusible link No 26 Then go to Step 20 NO The short circuit may be present in the power supply circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 1 and the fusible link No 26 and then replace the fusible link No 26 Then go to Step 20 TSB Revision 35C 272 ACTIVE STABILITY CONTROL SYSTEM ASC Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869NF DIAGNOSIS STEP 10 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Ignition switch ON position 3 Measure the voltage between terminal
141. No 8 and body ground OK Approximately battery positive voltage Q Is the check result normal YES Go to Step 14 NO Go to Step 11 STEP 11 Check the fuse No 12 Visually check for open circuit in fuse No 12 Q Is the check result normal YES Go to Step 12 NO Goto Step 13 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 2 3 a n 15 6 7 ofon 12 mamans Connector C 317 harness side Y Pli harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869NG Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869HF 35C 273 DIAGNOSIS STEP 12 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the C 317 ETACS ECU connector 2 Disconnect the A 51 ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 3 Measure the resistance between the A 51 ASC ECU connector terminal No 8 and the C 317 ETACS ECU connector terminal No 5 OK Continuity exists 2 O or less Q Is the check result normal YES The trouble can be an intermittent malfunction Refer to GROUP 00 How to use Troubleshooting inspection Service Points Ho
142. O Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C101C set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the DTC Check that DTC C1015 is also set Q Is DTC C1015 also set YES Perform the diagnosis for DTC C1015 Refer to P 35C 36 NO Goto Step 4 STEP 4 Check for wheel speed sensor installation Check how the wheel speed sensor lt FR gt is installed Discon nection of wheel speed sensor loose mounting bolt etc Q Is the check result normal YES Go to Step 5 NO Reinstall the wheel speed sensor FR correctly Refer to P 35C 316 Then go to Step 16 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC Oil seal Magnetic encoder _ T Whee L CAO n bearing AC504925AC 35C 63 DIAGNOSIS STEP 5 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 6 NO Replace the wheel speed sensor FR Refer to P 35C 316 Then go to Step 16 STEP 6 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the wheel bearing FR for looseness Refer to GROUP 26 On vehicle Service P 26 10 Q Is the check result normal YES Go
143. O The procedure is complete STEP 3 Check other DTC is set Check if the DTC related to the G and yaw rate sensor and the steering wheel sensor is set Q Is any DTC set YES Perform the diagnosis for the relevant DTC Refer to P 35C 27 NO Goto Step 4 STEP 4 G and yaw rate sensor calibration Perform the calibration of G and yaw rate sensor Refer to P 35C 302 Q Has the calibration succeeded YES Go to Step 5 NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 8 STEP 5 Steering wheel sensor calibration Perform the calibration of steering wheel sensor Refer to P 35C 304 Q Has the calibration succeeded YES Go to Step 6 NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 8 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 197 ST DIAGNOSIS EP 6 Brake fluid pressure sensor calibration Perform the calibration of brake fluid pressure sensor Refer to P 35C 308 Q ST Q ST Q Has the calibration succeeded YES Go to Step 7 NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 8 EP 7 Check whether the DTC is reset Is DTC C123A set NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 8 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 EP 8 Check whether the DTC is reset Is D
144. OBABLE CAUSES Damaged wiring harness and connectors ASC ECU malfunction Battery terminal malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C2200 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 3 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 TSB Revision 35C 162 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS STEP 3 DTC recheck after resetting CAN bus lines Q Is DTC C2200 set YES Return to Step 1 NO The procedure is complete DTC C2101 Abnormality in battery voltage high voltage A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated wi
145. ON When the ASC OFF display flashes at a rate of 2 Hz the TCL control brake control only is prohibited COMMENTS ON TROUBLE SYMPTOM This operation is performed for the following reasons and is not a malfunction e ASC ECU calculates the estimated temperature of the brake pad In general as the brake pad temperature increases the coefficient of friction for the brake pad becomes smaller resulting in the reduced braking force When the estimated temperature of the brake pad reaches the specified value or more ASC ECU flashes the ASC OFF indicator light at a rate of 2 Hz to warn the driver that the brake controllability by TCL is decreased by the reduced braking force Consequently ASC ECU prohibits the TCL control brake control only until it determines that the esti mated temperature of the brake pad is normal NOTE In addition to severe driving brake pad condition and brake drag are suspected as the cause of overheating After the ASC OFF display has turned off check the brake pad con dition and brake drag PROBABLE CAUSES e Overheat of brake pad TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 241 Inspection Procedure 3 Brake warning light stays ON with the parking brake lever released COMBINATION METER 04 Brake Fluid Level Switch and Parking Brake Switch Circuit 6 8 910 11 12 13 1415 16 LEVE
146. ONTROL SYSTEM ASC E IIE Seeme WHEEL SENSOR 996 321 STEERING WHEEL SENSOR REMOVAL AND INSTALLATION A CAUTION Be sure to remove the clock spring from the column switch and center the clock spring to prevent the damage of steering wheel sensor M1355005100403 If the center of the clock spring is not correctly aligned the steering wheel may not be turned fully or the cable inside the clock spring may be broken causing the SRS air bag to be inoperative or operated incorrectly Before removing the steering wheel air bag module assembly refer to GROUP 52B Service Pre cautions P 52B 26 and Driver s Air Bag Module Clock Spring P 52B 414 lt FWD gt P 52B 422 lt AWD gt When the steering wheel sensor is replaced or reinstalled always carry out calibration to make ASC ECU learn the neutral point Refer to P 35C 304 Pre removal operation Post installation operation Driver s airbag module assembly and steering wheel Driver s airbag module assembly and steering wheel assembly removal Refer to GROUP 37 Steering Wheel assembly installation Refer to GROUP 37 Steering P 37 32 Wheel P 37 32 Perform steering wheel calibration Refer to P 35C 304 AC506840AB Removal steps Removal steps Continued e Position the front wheels in a straight gt gt A lt lt 1 Clock spring column switch assembly ahead direction Refer to GROUP 52B SRS Control Unit P 52B 411 gt gt A lt lt 2 St
147. OSIS STEP 4 Wiring harness check between A 51 ASC ECU connector terminal No 18 and C 137 G and yaw rate sensor connector terminal No 2 as well as between A 51 ASC ECU connector terminal No 19 and C 137 G and yaw rate sensor connector terminal No 3 Check the communication circuit for open and short circuit Q Is the check result normal YES Go to Step 5 NO Repair the wiring harness and then go to Step 7 STEP 5 DTC recheck Q Is DTC U0125 set YES Replace the G and yaw rate sensor Refer to P 35C 320 Then go to Step 6 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 6 DTC recheck Q Is DTC U0125 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 7 NO The procedure is complete STEP 7 DTC recheck Q Is DTC U0125 set YES Return to Step 1 NO The procedure is complete DTC U0401 Engine signal malfunction detected A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 If DTC U0401 is set in ASC ECU always diagnose the CAN bus line If there is any fault in the CAN bus lines an incorrect DTC may be set In this case the set DTC is not highly reliable Before replacing the ECU ensure that the communica tion circuit is normal OPERATION Engine relat
148. ROL SYSTEM ASC 35C 319 WHEEL SPEED SENSOR WHEEL SPEED SENSOR INSULATION CHECK 1 Connect the circuit tester to the wheel speed sensor using the special tool extra fine probe MB992006 and measure the insulation resistance between terminal No 1 2 and the wheel speed sensor body as a single unit Standard value 5 MQ or more Front 2 If the insulation resistance is not within the standard value range replace the wheel speed sensor with a new one e ee2ean sec eeveanaeeoaoan ean an eae MB992006 AC608847AB TSB Revision s ACTIVE STABILITY CONTROL SYSTEM ASC 35C 320 G AND YAW RATE SENSOR G AND YAW RATE SENSOR REMOVAL AND INSTALLATION M1355004500185 A CAUTION Do not use impact wrench Do not drop or shock the G and yaw rate sensor When the G and yaw rate sensor is replaced or reinstalled always carry out calibration to make ASC ECU learn the neutral point Refer to P 35C 302 Pre removal and post installation steps Instrument panel console cover removal and installation Refer to GROUP 52A Instrument panel assembly P 52A 3 89 17 in Ib AC613540AC Removal steps Removal steps Continued 1 Oxygen sensor front connector 3 Gand yaw rate sensor and G and 2 Gand yaw rate sensor harness yaw rate sensor bracket connector 4 Gand yaw rate sensor 5 Gand yaw rate sensor bracket TSB Revision ACTIVE STABILITY C
149. ROUP 54C Trouble code diagnosis P 54C 9 Whenever ECU is replaced ensure that the CAN bus lines are normal TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 277 DIAGNOSIS COMMENTS ON TROUBLE SYMPTOM Although the cause of the trouble cannot be clearly resolved since it depends on the running status and road surface condition the malfunction of the hydraulic circuit may occur if any diagnostic trouble code is not detected If wheels and tires other than the ones with genuine speci fied size are mounted the ABS skid control TCL may be activated prematurely f a non genuine braking device or non genuine impact reduction device is mounted the ABS skid control TCL may be activated prematurely PROBABLE CAUSES Mounting of wheels and tires other than with genuine speci fied size Tire pressure abnormality Tire wear and deterioration Mounting of non genuine braking device or impact reduc tion device Wheel alignment abnormality Malfunction of brake related parts Malfunction of the wheel speed sensor Malfunction of the G and yaw rate sensor Steering wheel sensor malfunction Malfunction of hydraulic unit integrated with ASC ECU Malfunction of hydraulic circuit External radio wave noise interference DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB99191
150. RR wheel TCL drive Engine TCL drive Outputs the engine torque control signal engine torque 0 N m to the engine control module ECM for three seconds Operation pattern of items 01 to 08 Scan tool actuator test Item No 05 06 07 08 start Increase in pressure Cut valve End Suction valve Steady pressure TCL Skid control Reduction in pressure I l Scan tool actuator test l i Item No 01 02 03 04 start End l l Increase in pressure Solenoid valve ABS Steady pressure Reduction in pressure Drive Pump motor i Stop i l l Approx 0 05 Approx 0 01 second l l 1second 2 seconds second 1 1 AC400776AB TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 295 CHECK AT ECU TERMINALS M1355001700500 TERMINAL VOLTAGE CHECK Connect the special tool ASC check harness MB991997 to measure the voltage between each check connector terminal and the ground terminal No 16 or 47 XA TELTE 3768656363 harness MB991997 ASC ECU A 51 ASC ECU harness connector AC401192AF TSB Revision E ACTIVE STABILITY CONTROL SYSTEM ASC 35C 296 DIAGNOSIS Terminal Check item Check condition Normal condition No 1 Motor power supply Ignition switch ON OFF Battery positive voltage supply 2 ASC ECU power supply Ignitio
151. S or any SRS related component can lead to personal injury or death to service personnel from inadvertent firing of the air bag or to the driver and passenger from rendering the SRS inoperative Service or maintenance of any SRS component or SRS related component must be performed only at an authorized MITSUBISHI dealer MITSUBISHI dealer personnel must thoroughly review this manual and especially its GROUP 52B Supplemental Restraint System SRS before beginning any service or maintenance of any component of the SRS or any SRS related component NOTE The SRS includes the following components SRS air bag control unit SRS warning light front impact sensors air bag module side airbag module curtain air bag module side impact sensors seat belt pre tensioners clock spring and interconnecting wiring Other SRS related components that may have to be removed installed in connection with SRS service or maintenance are indicated in the table of contents by an asterisk 35C 2 ASC OFF SWITCH 35C 309 REMOVAL AND INSTALLATION 35C 309 INSPECTION 0 0 35C 310 HYDRAULIC UNIT 35C 311 REMOVAL AND INSTALLATION 35C 311 WHEEL SPEED SENSOR 35C 313 REMOVAL AND INSTALLATION FWD 35C 313 REMOVAL AND INSTALLATION lt AWD gt 35C 316 INSPECTION 002 35C 318 G AND YAW RATE SENSOR 35C 320 REMOVAL AND INSTALLATION
152. S warning light ASC warning dis play and ASC OFF display illuminate and the ABS sta bility control and TCL controls are prohibited If the battery terminal is not tightened properly a dump surge may occur and the power supply voltage may become abnormally high for a short time If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Trouble code diagnosis P 54C 9 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU contains the power supply circuit terminal No 32 for the solenoid valve The solenoid valve is energized by the valve relay which is incorporated in ASC ECU ASC ECU contains the power supply circuit terminal No 2 for ASC ECU The power is supplied from the fusible link No 34 through the multi purpose fuse No 17 TSB Revision S ACTIVE STABILITY CONTROL SYSTEM ASC 35C 268 DIAGNOSIS e ASC ECU contains the power supply circuit terminal No 8 for ASC ECU When the ignition switch IG1 is turned ON the voltage is applied to the relay incorporated in ETACS ECU to turn ON the relay and the power is supplied from the fusible link No 34 throug
153. STEP 8 Check the harness wire between C 137 G and yaw rate sensor connector terminal No 2 3 and A 51 ASC ECU connector No 18 19 Check the communication lines for open circuit and short circuit Q Is the check result normal YES Go to Step 9 NO Repair the wiring harness and then go to Step 14 STEP 9 G and yaw rate sensor installation check Check that the G and yaw rate sensor is installed correctly Q Is the check result normal YES Carry out the calibration of the G and yaw rate sensor Refer to P 35C 302 Then go to Step 10 NO Reinstall the G and yaw rate sensor correctly Refer to P 35C 320 and then go to Step 14 STEP 10 Using scan tool MB991958 chech the data list Check the following service data Refer to P 35C 291 tem 10 Master cylinder pressure Q Is the check result normal YES Go to Step 11 NO Carry out the calibration of the brake fluid pressure sensor Refer to P 35C 302 Then go to Step 12 STEP 11 Using scan tool MB991958 check the DTC the other system Use scan tool MB991958 to check that the diagnostic trouble code is set in the TS SST ECU Q Is the diagnostic trouble code set YES Carry out the diagnosis for the diagnostic trouble code Refer to GROUP 22C Diagnosis Troubleshooting P 22C 16 NO Go to Step 12 TSB Revision 35C 288 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS STEP 12 Retest the system Check if the HSA works with one occupant
154. Sensor Circuit WHITE 22 GRAY r gt c1 BLUE D rere lt I gt _Q co G AND YAW RATE I 6 137 A Ke 3 LLI eo Jl 19 ASC ECU ji A 51 SENSOR Connector A 51 KS XAXS XOT 1Y 8X9 X OQ D A19 9 TAIT IIIS TSB Revision WAH35M005A AC802706BG ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 285 N CAUTION If there is any problem in the CAN bus lines an incor rect diagnostic trouble code may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C CAN Bus Diagnosis Table P 54C 16 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 COMMENTS ON TROUBLE SYMPTOM The slope gradient may be low The vehicle is not completely stationary A failure may have occurred in the calibration of the G and yaw rate sensor or brake fluid pressure sensor The parking brake switch may be seized which causes the HSA to fail to start the operation A problem noise interference may have occurred in the CAN bus line resulting in an improper communication with ASC ECU or each ECU NOTE The HSA does not work even when the wheel speed sensor
155. Step 8 STEP 8 Check the fuse No 12 Visually check for open circuit in fuse No 12 Q Is the check result normal YES Go to Step 9 NO The short circuit may be present in the power supply circuit Check the wiring harness between the C 211 steering wheel sensor connector terminal No 2 and the C 317 ETACS ECU connector terminal No 5 and repair if necessary And then replace the fuse No 12 STEP 9 Check the wiring harness between C 211 steering wheel sensor connector terminal No 2 and C 317 ETACS ECU connector terminal No 5 Check the power supply lines battery power supply for open circuit Q Is the check result normal YES Go to Step 10 NO Repair the wiring harness between the C 211 steering wheel sensor connector terminal No 2 and the C 317 ETACS ECU connector terminal No 5 TSB Revision 35C 284 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS STEP 10 Using scan tool MB991958 check the ETACS system data list Check the input signal of IG1 relay Turn the ignition switch to the ON position Item No Item name Normal condition Item 254 IG voltage System voltage OK Normal condition is displayed Q Is the check result normal YES Replace the steering wheel sensor NO Refer to GROUP 54A ETACS Input Signal Procedure 2 The ignition switch IG1 signal is not received P 54A 731 Inspection Procedure 15 HSA Hill Start Assist does not work G and Yaw Rate
156. Step 9 STEP 4 Wheel alignment check At the same time with the following checks also check that no parts other than the genuine parts are mounted Front wheel alignment check Refer to GROUP 33 On vehicle Service Front Wheel Alignment Check and Adjustment P 33 8 Rear wheel alignment check Refer to GROUP 34 On vehicle Service Rear Wheel Alignment Check and Adjustment P 34 9 Q Is the check result normal YES Go to Step 5 NO Repair or replace the part s having damage or other problems Then go to Step 9 STEP 5 Wheel speed sensor check Check that no non genuine electronic device or no wiring har ness of other than genuine electronic device is mounted near the wheel speed sensor at wheel speed detection section and wiring harness section Refer to P 35C 316 Q Is the check result normal YES Go to Step 6 NO Remove the non genuine electronic device or the wiring harness of non genuine electronic device Then go to Step 9 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 279 DIAGNOSIS STEP 6 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 Item 01 FL wheel speed sensor Item 02 FR wheel speed sensor Item 03 RL wheel speed sensor Item 04 RR wheel speed sensor Item 08 Lateral G sensor Item 11 Steering angle sensor Item 12 Yaw rate sensor Q Is the check result normal YES Go to Step 7 NO Abnormality with it
157. TC C123A set YES Return to Step 1 NO The procedure is complete DTC C1219 Abnormality in steering wheel sensor signal A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the steering wheel sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 304 Do not drop or shock the G and yaw rate sensor When the G and yaw rate sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 302 When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Steering wheel sensor outputs the signal to ASC ECU via the CAN bus lines TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 198 DIAGNOSIS DTC SET CONDITIONS This DTC is set if any malfunction below is found The tolerance of neutral position of steering wheel sensor exceeds the specified range Abnormality in steering wheel sensor output value When abnormality is detected by comparing the value out put from the steering wheel sensor with
158. TC recheck after resetting CAN bus lines Q Is DTC C1210 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 tem 09 G sensor Q Is the check result normal YES Go to Step 6 NO Goto Step 4 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 178 DIAGNOSIS STEP 4 Connector check A 51 ASC ECU connector C 137 G and yaw rate sensor connector Q Is the check result normal YES Go to Step 5 NO Repair the connector and then go to Step 8 STEP 5 Wiring harness check between A 51 ASC ECU connector terminal No 18 and C 137 G and yaw rate sensor connector terminal No 2 as well as between A 51 ASC ECU connector terminal No 19 and C 137 G and yaw rate sensor connector terminal No 3 Check the communication circuit for open and short circuit Q Is the check result normal YES Replace the G and yaw rate sensor Refer to P 35C 320 and then go to Step 7 NO Repair the wiring harness and then go to Step 8 STEP 6 Check whether the DTC is reset Q Is DTC C1210 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 8 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 7 Check whether the DTC is reset Q Is DTC C1210 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and th
159. TEP 5 ETACS ECU variant coding Perform the variant coding to the ETACS ECU Q Does variant coding succeed YES Go to Step 7 NO Replace the ETACS ECU Refer to GROUP 54A ETACS ECU P 54A 769 and then go to Step 7 STEP 6 Check whether the diagnostic trouble code is reset Q Is DTC C2206 set YES Replace the hydraulic unit incorporates in ASC ECU Refer to P 35C 311 and then go to Step 7 NO The procedure is complete STEP 7 Check whether the diagnostic trouble code is reset Q Is DTC C2206 set YES Return to Step 1 NO The procedure is complete TSB Revision 35C 176 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS DTC C1210 Abnormality in G and yaw rate sensor Abnormality in longitudinal G sensor output voltage lt AWD gt G and Yaw Rate Sensor Circuit e a J WHITE GRAY r3 c1 BLUE D EN 4D d co G AND YAW RATE SENSOR I 6 137 A Keno 3 LLI e 3l 19 ASC ECU oE 6 Connector A 51 AC802702 AF WAH35M005A AC802706BG A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal Do not drop or shock the G and yaw rate sensor When the G and yaw
160. TIONS SERVICE SPECIFICATIONS Item M1355008200131 Standard value Wheel speed sensor current mA 5 9 8 4 or 11 8 16 8 Wheel speed sensor insulation resistance MQ 5 or more DIAGNOSIS INTRODUCTION TO ASC DIAGNOSIS The ASC operates differently from conventional brake systems These differences include sounds sensations and vehicle performance that owners and service technicians who are not familiar with ASC may not be used to ASC DIAGNOSTIC TROUBLE CODE DETECTION CONDITIONS ASC diagnostic trouble codes DTCs are set under different conditions depending on the malfunction detected Most ASC DTCs will only be set during vehicle operation Some ASC DTCs will also be set during the ASC self check immediately after the engine is started M1355000800065 Some operational characteristics may seem to be malfunctions but they are simply signs of normal ASC operation When diagnosing the ASC system keep these operational characteristics in mind Inform the owner of the kind of performance charac teristics to expect from an ASC equipped vehicle When you check if an ASC DTC will be displayed again after the DTC has been erased you should duplicate the ASC DTC set conditions Depending on the detection timing and set conditions for the spe cific ASC DTC you must either drive the vehicle or turn the engine off and restart it To set the proper conditions for that DTC again refer to ASC DTC SET CONDITIO
161. TROL SYSTEM ASC DIAGNOSIS DTC C104B Abnormality in FL wheel inlet valve system DTC C104F Abnormality in FR wheel inlet valve system DTC C1053 Abnormality in RL wheel inlet valve system DTC C1057 Abnormality in RR wheel inlet valve system DTC C105F Abnormality in FL wheel outlet valve system DTC C1063 Abnormality in FR wheel outlet valve system DTC C1067 Abnormality in RL wheel outlet valve system DTC C105B Abnormality in RR wheel outlet valve system DTC C1200 Abnormality in FL RR wheel cut valve system DTC C1204 Abnormality in FR RL wheel cut valve system DTC C1208 Abnormality in FL RR wheel suction valve system DTC C120C Abnormality in FR RL wheel suction valve system A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU contains the power supply circuit terminal No 32 for the solenoid valve The solenoid valve is ener gized by the valve relay which is incorporated in ASC ECU The valve relay which is incorporated in ASC ECU is always energizing th
162. Then press OK button 7 The display should show Completed Press OK button Press the OK button 9 The display should show SAS Calibration Do you want to start Then press the OK button Co TSB Revision x ACTIVE STABILITY CONTROL SYSTEM ASC 35C 308 ON VEHICLE SERVICE NOTE Please execute after making a tire and a steering wheel straight 10 The display should show Completed Press OK button 11 Turn the ignition switch to LOCK off position and then turn the ignition switch ON again 12 Select the relevant system from the menu 13 Select ACD AYC from the system list under System select and press OK button 14 Select Special function under ACD AYC 15 Select Sensor calibration under Special function 16 Select SAS calibration under Sensor calibration and press OK button 17 The screen displays SAS calibration The selected command will be executed Are you sure Caution Confirm the execution conditions Then press OK button 18 Executed The command was executed will be shown Then press OK button 19 Select Diagnostic trouble code under ACD AYC If the diagnostic trouble code U1428 G and Yaw Rate Sensor Data Error past trouble is set clear it 20 Learning neutral point complete 21 Turn the ignition switch to LOCK OFF position and then disconnect the scan tool BRAKE FLUID PRESSURE SENSOR CALIBRATION A CAUTION Prior to calibration
163. Turn the ignition switch to LOCK OFF position and then disconnect the scan tool TSB Revision 35C 306 ACTIVE STAB ILITY CONTROL SYSTEM ASC ON VEHICLE SERVICE lt Vehicles with TC SST gt A CAUTION After the next operation has been completed carry out the fol lowing two operations Alignment adjustment Front Steering wheel sensor column switch assembly replacement removal installation ASC ECU replacement Update the neutral position stored in the steering wheel sensor Reset the calibrated value of the steering angle stored in ASC ECU Reset the calibrated value of the steering angle stored in AWC ECU Only when the steering wheel sensor column switch assembly is replaced removed or installed N CAUTION Before performing the calibration check if the steering wheel sensor related diagnostic trouble code is set in ASC ECU When the diagnostic trouble code other than C121A is set carry out inspection according to each trouble shooting procedure When the ASC ECU is replaced 1 Place the vehicle on a level surface with its road wheels in the straight ahead position A CAUTION Be fore connecting or disconnecting the scan tool turn the ignition switch to the LOCK OFF position 2 3 4 5 Oo 9 Set the scan tool with the ignition at LOCK OFF Ignition switch ON Select the relevant
164. U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is the DTC C2111 or C2112 set YES Go to Step 3 NO The procedure is complete STEP 3 Battery check Refer to GROUP 54A Battery Test P 54A 8 Q Is the battery in good condition YES Go to Step 4 NO Charge or replace the battery and then go to Step 6 STEP 4 Charging system check Refer to GROUP 16 Charging System P 16 4 Q Is the charging system in good condition YES Go to Step 5 NO Repair or replace the charging system component s and then go to Step 6 STEP 5 Check whether the DTC is reset Q Is the DTC C2111 or C2112 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 6 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 6 Check whether the DTC is reset Q Is the DTC C2111 or C2112 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 191 DIAGNOSIS DTC C2114 Abnormality in G and yaw rate sensor operation voltage Low voltage DTC C2115 Abnormality in G and yaw rate sensor ope
165. Using scan tool MB991958 actuator test Perform the actuator test No 07 of the combination meter sys tem and check if the ABS warning light illuminates Refer to GROUP 54A Combination Meter Actuator Test Table P 54A 100 Vehicles without color liquid crystal display or P 54A 100 Vehicles with color liquid crystal display gt Q Is the check result normal YES Go to Step 4 NO Diagnose the combination meter Refer to GROUP 54A Combination Meter Trouble Symptom Chart P 54A 73 Then go to Step 8 TSB Revision s ACTIVE STABILITY CONTROL SYSTEM ASC 35C 248 DIAGNOSIS STEP 4 ETACS ECU coding data check Use scan tool to check if coding data stored in ETACS ECU is normal Refer to GROUP 00 Coding List P 00 28 Q Is the check result normal YES Go to Step 5 NO Replace the ETACS ECU and then go to Step 8 STEP 5 Using scan tool MB991958 other system diagnostic trouble code Using scan tool check that the DTC U0141 is not set by the combination meter system Q Is the DTC U0141 set YES Troubleshoot the combination meter and then go to Step 8 NO Goto Step 6 STEP 6 Using scan tool MB991958 other system diagnostic trouble code Using scan tool check that the DTC U0121 is not set by the ETACS system Q Is the DTC U0121 set YES Troubleshoot the ETACS ECU Refer to GROUP 54A ETACS ECU Troubleshooting P 54A 671 and then go to Step 8 NO Go to Step 7 STEP 7 Retest the system
166. Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool to ASC ECU 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 45 and the body ground and between the ground terminal No 46 and the body ground OK 1 volt or less Q Is the check result normal YES Go to Step 6 NO Not normal at the terminal No 45 or No 46 Go to Step 8 STEP 6 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool to ASC ECU 2 Measure the resistance between the wheel speed sensor power supply terminal signal terminal No 45 and the body ground and between the wheel speed sensor ground terminal No 46 and the body ground OK No continuity Q Is the check result normal YES Go to Step 7 NO Not normal at the terminal No 45 or No 46 Go to Step 8 TSB Revision 35C 34 MB991997 A 51 ASC ECU harness connector ACTIVE STABILITY CONTROL SYSTEM ASC Check harnes
167. YSTEM ASC DIAGNOSIS HOW TO PERFORM ACTUATOR TEST Required Special Tools MB991958 Scan Tool M U T IIl Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T IIl Main Harness A N CAUTION 1 2 3 4 ao MB991827 AC608435 AB To prevent damage to scan tool MB991958 always turn the ignition switch to the LOCK OFF position before con necting or disconnecting scan tool MB991958 Connect scan tool MB991958 to the data link connector Turn the ignition switch to the ON position Select System Select Select ABS ASC ASTC WSS from the system list and select the OK button Choose Actuator Test from ABS screen Choose an appropriate item and select the OK button TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS DIAGNOSTIC TROUBLE CODE CHART A CAUTION 35C 27 M1355001100928 During diagnosis a DTC associated with other system may be set when the ignition switch is turned on with connector s disconnected On completion confirm all systems for DTC s If DTC s are set erase them all Item Reference page Abnormality in FL wheel speed sensor circuit P 35C 30 Abnormality in FR wheel speed sensor circuit Abnormality in RL wheel speed sensor circuit P 35C 36 P 35C 41 Abnormality in RR
168. a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS ASC ECU monitors the signals from each wheel speed sensor while the vehicle is being driven If any periodical drop is found in these sensor signals ASC ECU will set the relevant DTC PROBABLE CAUSES Wheel bearing malfunction Deformation of the wheel speed detection encoder Missing teeth of the wheel speed detection encoder Adhesion of foreign materials on the wheel speed detection encoder ASC ECU malfunction The number of poles on the Magnetic encoder for wheel speed detection N pole and S pole is changed DIAGNOSIS Required Special Tools MB991958 Scan Tool M U T Ill Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T IIl Main Harness A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 105 STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool MB991958 to diagnose the CAN bus lines Q Is the check r
169. able e MB991910 M U T III Main Harness A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 228 DIAGNOSIS STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC U1003 set YES Go to Step 3 NO The procedure is complete STEP 3 Connector check A 51 ASC ECU connector C 137 G and yaw rate sensor connector Q Is the check result normal YES Go to Step 4 NO Repair the connector and then go to Step 7 STEP 4 Wiring harness check between A 51 ASC ECU connector terminal No 18 and C 137 G and yaw rate sensor connector terminal No 2 as well as between A 51 ASC ECU connector terminal No 19 and C 137 G and yaw rate sensor connector terminal No 3 Check the communication circuit for open and short circuit Q Is the check result normal YES Go to Step 5 NO Repair the wiring harness and then go to Step 7 STEP 5 DTC recheck Q Is DTC U1003 set YES Replace the G and yaw rate sensor Refer to P 35C 320 Then go to Step 6 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 6 DTC recheck Q Is DTC U1003 set YES Replace the hydraulic unit ASC ECU Refe
170. aced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU stores the calibrated value of the G and yaw rate sensor steering wheel sensor and brake fluid pressure sensor DTC SET CONDITIONS This DTC is set when the calibrated value for each sensor stored in ASC ECU is not within the predetermined range Abnormality in neutral position of the G and yaw rate sensor Abnormality in neutral position of the steering wheel sensor Abnormality in neutral position of the brake fluid pressure sensor TSB Revision 35C 196 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS PROBABLE CAUSES Improper installation of G and yaw rate sensor or steering wheel sensor ASC ECU malfunction External noise interference DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C123A set YES Go to Step 3 N
171. age Abnormality in G amp yaw rate sensor operation voltage High voltage Abnormality in sensor calibration TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS Brake warning light brake warning display ABS warning light ABS warning display ASC warning display and light 35C 17 ASC OFF display Abnormality in steering wheel sensor signal OFF OFF ON Abnormality in steering wheel sensor calibration Steering wheel sensor neutral point not learned Internal abnormality in steering wheel sensor Valve calibration error OFF ABS warning light Flashing 2 Hz ABS warning display ON ON Control parameter not implement Implausible diagnosis data Bus off Engine time out error 6 CVT time out error TC SST time out error Steering wheel sensor time out error ETACS time out error AWC time out error G amp yaw rate sensor message time out error message error G amp yaw rate sensor bus off Engine signal malfunction detected Steering wheel sensor CRC message error Variant coding not implemented Variant coding value invalid includes faulty installation TSB Revision E ACTIVE STABILITY CONTROL SYSTEM ASC 35C 18 DIAGNOSIS NOTE e 1 Turns on when two or more wheels are faulty e Stays on until
172. ain Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C2104 set YES Go to Step 3 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 137 STEP 3 Battery check Refer to GROUP 54A Battery Test P 54A 8 Q Is the battery in good condition YES Go to Step 5 NO Replace the battery Then go to Step 4 STEP 4 Charging system check Refer to GROUP 16 Charging System P 16 4 Q Is the charging system in good condition YES Go to Step 5 NO Repair or replace the charging system component s Then go to Step 11 STEP 5 Connector check A 51 ASC ECU connector Q Is the check result normal YES Go to Step 6 NO Repair the defective connector Then go to Step 11 STEP 6 Fusible link check Check the fusible link No 27 Visually check for open circuit in the fusible link No 27 Q Is the check result normal YES Go to Step 8 NO Go to Step 7 STEP 7 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then m
173. always carry out the calibration of all sen sors steering wheel sensor G and yaw rate sensor and brake fluid pressure sensor at one time Refer to P 35C 302 M1355005600635 Pre removal operation Post installation operation Strut tower bar removal Refer to GROUP 424A Strut ntake manifold plenum installation Refer to GROUP 15 Tower Bar P 42A 15 Intake Manifold Plenum P 15 10 lt FWD gt P 15 9 Brake fluid draining lt AWD gt Intake manifold plenum removal Refer to GROUP 15 Brake fluid refilling and air bleeding Refer to GROUP 35A Intake Manifold Plenum P 15 10 lt FWD gt P 15 9 On vehicle Service Brake Fluid Level Inspection and lt AWD gt Bleeding P 35A 18 Strut tower bar installation Refer to GROUP 424A Strut Tower Bar P 42A 15 Hydraulic unit check Refer to P 35C 299 16 x 3 N m 12 2 ft lb 1322 Nm EC 111 22 in A Se 89 17 in Ib 11 7 AC703833 AB Removal steps Removal steps Continued 1 ASC ECU harness connector 7 Suction pipe liquid pipe and clip Suction pipe installation bolt connection 3 Wheel speed sensor harness 8 Hydraulic unit ASC ECU and connector connection hydraulic unit bracket 4 Wheel speed sensor harness clip lt lt A gt gt 9 Hydraulic unit ASC ECU connection 10 Hydraulic unit bracket insulator gt gt A lt lt 5 Brake tube connection 11 Hydraulic unit bracket B 6 Brake tube and clip connection 12
174. an tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 4 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 220 DIAGNOSIS STEP 2 Check whether the DTC is reset Q ls DTC U0100 U0101 U0126 U0141 or U0114 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check read the DTC other system Use scan tool to check that other DTC is set in the ECU corre sponding to the relevant diagnosis Q Is other DTC set YES Troubleshoot for the relevant DTC NO Goto Step 4 STEP 4 Using scan tool MB991958 check read the DTC other system Use scan tool to check if the same DTC time out is set in the other ECU CAN C Q Is any DTC set YES DTC U0100 is set Replace the engine control module ECM and then go to Step 5 YES DTC U0101 is set Replace the TCM or TC SST ECU and then go to Step 5 YES DTC U0126 is set Replace steering wheel sensor and then go to Step 5 YES DTC U0141 is set Replace the ETACS ECU and then go to Step 5 YES DTC U0114 is set Replace the AWC ECU and then go to Step 5 NO No DTC is set The procedure is complete STEP 5 Check whether the DTC is reset Q Is DTC U0100 U0101 U0126 U0141 or U0114 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311
175. any metallic particle Check that there is not any trou ble prior to reassembling it M1352008301381 Pre removal and post installation operation Air cleaner body assembly removal and installation Refer to GROUP 15 Air Cleaner P 15 10 Front wheel speed sensor LH Rear scuff plate rear door opening trim cargo floor box trunk room rear end trim flexible floor plug flexible floor guide quarter trim removal and installation Refer to GROUP 52A Interior trim P 52A 11 Rear wheel speed sensor TSB Revision E ACTIVE STABILITY CONTROL SYSTEM ASC 35C 314 WHEEL SPEED SENSOR lt Front gt 2 4 3 13 2N m 1112 22intb 44 ur 98 17 in Ib 3 4 ate T es iN 8 5 1 5 N m y oc a ema J 2 AIJ ny 1 2Nm 5 Eo 98 17 P S4 Te Seg 1 ye 8 5 1 5 N m 13 2 N m 76 13 in Ib 111 22 in Ib Rear vB U 11 2 Nm 98 17 in Ib N7 A gt 6 8 5 1 5 N m gt N i 10 76 13 in Ib 8 5 1 5 N m 76 x 13 in Ib 11 x 2 Nm 98 17 in Ib AC807224AB Front wheel speed sensor Rear wheel speed sensor removal steps removal steps 1 Bolt front wheel speed sensor gt gt A lt lt 6 Bolt rear wheel speed sensor and knuckle connection and rear wheel hub assembly 2 Front wheel speed sensor connection connector gt gt A lt lt 7 O ring gt gt C lt lt 3 Front wheel speed sensor 8 Rear wheel speed sensor grommet connector 4 Front wheel speed sen
176. brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 When the DTC C1290 is set in ASC ECU the DTC for another system may also be set When the DTC for another system is set carry out diagnosis for that sys tem first OPERATION ASC ECU receives signals necessary for the operations of ABS and ASC from the engine control module ECM TC SST ECU AWC ECU ETACS ECU and the steering wheel sensor via the CAN bus lines DTC SET CONDITIONS ASC ECU receives signals necessary for the operations of ABS and ASC from the engine control module ECM TC SST ECU AWC ECU ETACS ECU and steering wheel sensor via CAN bus lines This DTC is stored when ASC ECU cannot receive the signals necessary for the operations of ABS and ASC from the engine control module ECM TC SST ECU AWC ECU ETACS ECU and steering wheel sensor PROBABLE CAUSES Engine control module ECM malfunction TC SST ECU malfunction AWC ECU malfunction Steering wheel sensor malfunction Malfunction of the CAN bus ASC ECU malfunction Malfunction of ETACS ECU ETACS ECUS have been interchanged between two vehi cles TSB Revision A ACTIVE STABILITY CONTROL SYSTEM ASC 35C 170 DIAGNOSIS DIAGNOSIS STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnost
177. brake pressure applied from the master cylinder converts this pressure into the voltage signal and outputs it DTC SET CONDITIONS When the pressure sensor output signal is not within the stan dard value range ASC ECU sets this DTC TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 145 DIAGNOSIS PROBABLE CAUSES Incorrect brake pedal height Incorrect adjustment of the stoplight switch Master cylinder malfunction Brake booster malfunction e ASC ECU malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C121D set YES Go to Step 3 NO The procedure is complete STEP 3 Brake pedal check Refer to GROUP 35A On vehicle Service P 35A 14 Q Is the check result normal YES Go to Step 4 NO Adjust the brake pedal height Refer to GROUP 35A On vehicle Service P 35A 14 Then go to Step 7 STEP 4 Check the installation condition of the stoplight switch Refer to GROUP 35A On vehicle Service P
178. cating whether the brake pedal is depressed or not to ASC ECU Detects the yaw rate and longitudinal lt AWD gt and lateral acceleration of a vehicle then outputs the signal to ASC ECU via the CAN line Steering wheel sensor Detects the steering angle of the steering wheel and outputs signal to ASC ECU via the CAN bus line ASC OFF switch Brake fluid pressure sensor Hydraulic unit ABS warning light Outputs the ASC ON OFF signal to ASC ECU Integrated into the hydraulic unit and outputs the signal for the brake fluid pressure in the master cylinder to ASC ECU Drives the solenoid valve using the signal from ASC ECU and controls the brake fluid pressure for each wheel Informs the driver of the system status by illuminating flashing or turning off the ABS warning light according to the signal from ASC ECU ABS warning display Informs the driver of the system status by illuminating or turning off the ABS warning display according to the signal from ASC ECU Brake warning light Used as the brake warning light for the parking brake brake fluid level and EBD control Informs the driver of the system status by illuminating or turning off the brake warning light according to the signal from ASC ECU Brake warning display ASC operation display and light Used as the brake warning display for the brake fluid level and EBD control Informs the driver of the system status by illuminating or
179. ce DIAGNOSIS Required Special Tools MB991958 Scan Tool M U T Ill Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T IIl Main Harness A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 184 DIAGNOSIS STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 Using scan tool MB991958 check the DTC Check that the DTC U0125 is set in ASC ECU Q Is DTC U0125 set YES Troubleshoot for the DTC Refer to P 35C 221 Then go to Step 3 NO Goto Step 3 STEP 3 DTC recheck after resetting CAN bus lines Q Is DTC C123C set YES Go to Step 4 NO The procedure is complete STEP 4 Check the wheel speed sensor related DTC Use scan tool to check whether the wheel speed sen sor related or steering wheel sensor related DTC is set or not Q Is the DTC set YES Troubleshoot for the relevant DTC Refer to P 35C 27 NO Goto Step 5 STEP 5 G and yaw rate sensor installation check Check that the G and yaw rate sensor is installed correctly Q Is the check result normal YES After checking the G and yaw rate sensor carry out calibration of the G and yaw rate sensor to make ASC ECU relearn the neutral point R
180. ch wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS ASC ECU monitors the voltage fluctuation in each wheel speed sensor circuit If ASC ECU detects the open or short circuit in the circuit it will set a DTC PROBABLE CAUSES Current trouble Damaged wiring harness and connectors Noise interference Malfunction of wheel speed sensor Malfunction of ASC ECU TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 43 DIAGNOSIS Past trouble Carry out diagnosis with particular emphasis on wiring har ness and connector failures between ASC ECU and the wheel speed sensor For diagnosis procedures refer to How to treat past trouble GROUP 00 How to Cope with Intermittent Malfunction P 00 13 DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C l e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC che
181. check that no brake fluid pressure sen sor related diagnostic trouble codes are set A CAUTION After the following procedure is complete carry out cali bration to let the ASC ECU learn the neutral position of the brake fluid pressure sensor During diagnosis according to diagnostic trouble code No C123A ASC ECU replacement A CAUTION During the calibration the brake pedal should be released the stoplight switch should be off 1 Park the vehicle on a level surface A CAUTION Before connecting or disconnecting the scan tool turn the ignition switch to the LOCK OFF position 2 Set the scan tool with the ignition at LOCK OFF 3 Turn the ignition switch to the ON position 4 Select the relevant system from the menu 5 Select ABS ASC ASTC WSS from the system list under System select and press OK button M1355024100112 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC ASC OFF SWITCH 35C 309 6 Select Special function under ABS ASC ASTC WSS 7 Select Sensor calibration under Special function 8 Select M C pressure sensor calibration from the selected item and press OK button 9 The screen displays M C pressure sensor calibration The selected command will be executed Are you sure Caution Please check execution conditions Then press OK button 10 Executed The command was executed will be shown Then
182. cial tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the voltage between terminal No 2 and body ground OK Approximately battery positive voltage Q Is the check result normal YES Go to Step 18 NO Goto Step 15 STEP 15 Check the fuse No 17 Visually check for open circuit in fuse No 17 Q Is the check result normal YES Go to Step 16 NO Go to Step 17 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 1 2 e4 5 6 7 8 9 iori 12 13 14115 16 17 1819 Connector C 315 harness side i A 2 Y P aid harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869NI Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869 HH 35C 275 DIAGNOSIS STEP 16 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the C 315 ETACS ECU connector 2 Disconnect the A 51 ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 3 Measure the resistance between the A 51 ASC ECU connector terminal No 2 and the C 315 ETACS ECU connector terminal No 4 OK Continuity
183. ck harness STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1020 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 Item No 03 RL wheel speed sensor Q Is the check result normal YES Go to Step 10 NO Go to Step 4 STEP 4 Connector check A 51 ASC ECU connector C 39 intermediate connector D 15 intermediate connector F 21 wheel speed sensor lt RL gt connector Q Is the check result normal YES Go to Step 5 NO Repair the defective connector Then go to Step 11 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 44 DIAGNOSIS STEP 5 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool to ASC ECU 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 36 and the body ground and between
184. ction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 201 DIAGNOSIS STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C121A set YES Go to Step 3 NO The procedure is complete STEP 3 Steering wheel sensor calibration Perform calibration of steering wheel sensor Refer to P 35C 304 Q Has the calibration succeeded YES Go to Step 4 NO After the steering wheel sensor is replaced perform the steering wheel sensor calibration to make ASC ECU learn the neutral point again Refer to P 35C 304 Then go to Step 4 STEP 4 Check whether the DTC is reset Q Is DTC C121A set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 5 NO The procedure is complete STEP 5 Check whether the DTC is reset Q Is DTC C121A set YES Return to Step 1 NO The procedure is complete DTC C2205 Internal malfunction of steering wheel sensor A CAUTION If there is any prob
185. ctor and the C 117 parking brake switch connector Check for short circuit in the harness wire between the C 04 combination meter connector terminal No 4 and the C 117 parking brake switch connector terminal No 1 Q Is the check result normal YES Go to Step 17 NO Repair the wiring harness Then go to Step 18 STEP 17 Retest the system Q Does the brake warning light turn ON and OFF normally according to the parking brake lever operation YES Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 NO Replace the combination meter assembly Refer to GROUP 54A Combination Meter P 54A 124 Then go to Step 18 STEP 18 Retest the system Q Does the brake warning light turn ON and OFF normally according to the parking brake lever operation YES The procedure is complete NO Return to Step 1 Inspection Procedure 4 ABS warning light does not illuminate when ignition switch is turned to the ON position engine stopped A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Trouble code diagnosis P 54C 9 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure senso
186. d Enabled Enabled Enabled Prohibited Enabled Prohibited Enabled Prohibited Enabled Re execution of variant coding Enabled Prohibited Prohibited Prohibited Prohibited Abnormality in G amp yaw rate sensor Abnormal Enabled ity in longitudin al G sensor output value Prohibited Prohibited Prohibited Prohibited Abnormality in G amp yaw rate sensor Abnormal Enabled ity in longitudin al G sensor output signal Prohibited Prohibited Prohibited Prohibited Abnormality in G amp yaw rate sensor Enabled Enabled Prohibited Prohibited Prohibited Internal abnormality in G amp yaw rate sensor Enabled Enabled Prohibited 4 6 Prohibited TSB Revision Prohibited Prohibited 35C 22 Item EBD DIAGNOSIS ABS Skid control ACTIVE STABILITY CONTROL SYSTEM ASC TCL HSA Brake fluid pressure sensor power supply circuit Low input Enabled Prohibited Prohibited Prohibited Prohibited Brake fluid pressure sensor power supply circuit High input Enabled Prohibited Prohibited Prohibited Prohibited Low voltage Abnormality in G amp yaw rate sensor operation voltage Enabled Enabled 9 Prohibited 9 Prohibited Prohibited Prohibited Abnormality in G amp yaw rate sensor operation voltage High
187. drive status to ASC ECU AWC ECU performs integrated control with ASC ECU ASC control unit ASC ECU NOTE e 1 AWD e 2 CVT e 2 Color liquid crystal display Controls the actuators hydraulic unit based on the signals sent from sensors Controls the self diagnostic function and fail safe function Controls diagnostic function Compatible with scan tool TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 7 GENERAL INFORMATION SCHEMATIC DIAGRAM Combination meter and multi information display ABS warning light and display Brake warning light and display ASC operation display and light ASC OFF display ests ole cd al ASC warning display and light Parking Wheel speed sensor RL H H brake switch E N E ee ENEA Data link Wheel speed sensor RR connector FR suction valve Wheel speed sensor FR FL suction valve Master cylinder pressure sensor FR cut valve FL cut valve G and yaw rate sensor ix dst ee ee yt ene FR solenoid valve OUT 1 ASC ECU power supply ASC ECU I 1 FR solenoid valve IN 1 Steering wheel sensor FL solenoid valve OUT gt FL solenoid valve IN RR solenoid valve OUT RR solenoid valve IN RL solenoid valve OUT RL solenoid valve IN Steering wheel sensor G and yaw rate sensor Rear left wheel vheel FR Rear right wheel RR Whee speed sensor FR Stop light switch Hydraulic unit
188. e e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 4 TSB Revision x ACTIVE STABILITY CONTROL SYSTEM ASC 35C 230 DIAGNOSIS STEP 2 Using scan tool MB991958 check the other system DTC Use scan tool to check that the DTC B222C is set in the ETACS ECU Q Is the DTC set YES Troubleshoot the relevant DTC and then go to Step 4 NO Goto Step 3 STEP 3 Check whether the DTC is reset 1 Erase the DTC 2 Turn the ignition switch to the OFF position 3 Turn the ignition switch to the ON position 4 Check that the ABS warning light goes out NOTE If the DTC U1415 is not deleted the ABS warning light keeps illuminating Q Is DTC U1415 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 4 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 4 Check whether the DTC is reset 1 Erase the DTC 2 Turn the ignition switch to the OFF position 3 Turn the ignition switch to the ON position 4 Check that the ABS warning light goes out when the ignition switch is turned to the ON position NOTE If the DTC U1415 is not deleted the ABS warning l
189. e power is supplied with the ground circuit of CAN communication device open circuited an electric potential abnormality may occur to the CAN bus lines When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 COMMENTS ON TROUBLE SYMPTOM When scan tool cannot communicate with the ABS ASC sys tem the CAN bus lines ASC ECU power supply circuit system ground or ASC ECU may be faulty PROBABLE CAUSES Damaged wiring harness and connectors ASC ECU malfunction Wrong routing of scan tool harness Abnormality in battery or generator Abnormality in power supply voltage to ASC ECU ECU malfunction of other system DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C l e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A Scan tool CAN bus diagnosis Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Check the power supply circuit and repair if necessary Refer to P 35C 266 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnosis table P 54C 16 TSB Revision a ACTIVE STABILITY CONTROL SYSTEM ASC 35C 240 DIAGNOSIS Inspection Procedure 2 ASC OFF display flashes at a rate of 2Hz OPERATI
190. e solenoid valve unless the initial check is in progress when the ignition switch is turned on and the recurrent system check is in progress ASC ECU activates the solenoid valve by turning on its driv ing transistor DTC SET CONDITIONS These DTCs will be set under the cases below The solenoid valve is not energized even after ASC ECU has turned on the driving transistor Open circuit is present in the power supply circuit to the ASC ECU solenoid valve or the valve relay has failed After ASC ECU has turned off the driving transistor the solenoid valve still remains energized short in the solenoid valve circuit When a solenoid valve failure is detected PROBABLE CAUSES ASC ECU malfunction TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 134 DIAGNOSIS DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C l e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is the relevant DTC set YES Go to Step 3 NO The procedure is complete STEP 3 Check whether the DTC
191. easure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Disconnect the fusible link No 27 3 Measure the resistance between the terminal No 32 and the body ground OK No continuity Q Is the check result normal Check harness YES Replace the fusible link No 27 Then go to Step 11 NO The short circuit may be present in the power supply circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 32 and the fusible link No 27 and then replace the fusible link No 27 Then go to Step 11 MB991997 ASC ECU A 51 ASC ECU harness connector AC606869FR TSB Revision 35C 138 Check harness ASC ECU AC606869DG MB991997 A 51 ASC ECU harness connector Check harness is ASC ECU A 51 ASC ECU harness connector AC606869DH ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS STEP 8 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the voltage between the terminal No 32 and the body ground OK Bat
192. eck harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the voltage between the terminal No 1 and the body ground OK Battery positive voltage Q Is the check result normal YES Go to Step 9 NO The open circuit may be present in the power supply circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 1 and the fusible link No 26 Then go to Step 11 STEP 9 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the resistance between the terminal No 16 and the body ground and between the terminal No 47 and the body ground OK Continuity exists 2 O or less Q Is the check result normal YES Go to Step 10 NO An open circuit may be present in the ground circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 16 and the body ground and between the A 51 ASC ECU connector terminal No 47 and the body ground Then go to Step 11 TSB Revision z ACTIVE STABILITY CONTROL SYSTEM ASC 35C 144 DIAGNOSIS STEP 10 Check whether the DT
193. eck the DTC Check that DTC U1417 is set in ASC ECU Q Is DTCU1417 set YES Troubleshoot for DTC U1417 Refer to P 35C 234 lt FWD gt P 35C 231 lt AWD gt Then go to Step 5 NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 7 STEP 5 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 tem 68 Allow ESP torque request Q Is the check result normal YES Go to Step 6 NO Replace the engine control module ECM Refer to GROUP 13A Troubleshooting Diagnosis function P 13A 10 lt AWD gt or GROUP 13B Troubleshooting Diagnosis function P 13B 12 FWD and then go to Step 7 STEP 6 Check whether the DTC is reset Q Is DTC C121C set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 7 NO Ifthe trouble symptom is resolved an intermittent malfunction such as poorly engaged connector s or wiring harness is suspected Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 7 Check whether the DTC is reset Q Is DTC C121C set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 166 DIAGNOSIS DTC C1290 CAN time out error lt FWD gt N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnost
194. eck the DTC Use scan tool to check the DTC for the ASC system Q Is the DTC set YES Carry out the diagnosis for the DTC Refer to P 35C 27 NO Goto Step 3 STEP 3 Actuator test of combination meter Perform the following actuator test by the combination meter system and check if the ASC OFF display or light illuminates normally Refer to GROUP 54A Combination Meter Actuator Test Table P 54A 100 lt Vehicles without color liquid crystal dis play gt or P 54A 100 lt Vehicles with color liquid crystal display gt Item No 7 Indicator 1 Q Is the check result normal YES Go to Step 4 NO Replace the combination meter Refer to GROUP 54A Combination Meter P 54A 124 Then go to Step 9 STEP 4 ASC OFF switch check Refer to P 35C 310 Q Is the check result normal YES Go to Step 5 NO Replace ASC OFF switch Refer to P 35C 309 Then go to Step 10 STEP 5 Connector check C 313 ETACS ECU connector C 36 intermediate connector C 45 ASC OFF switch connector Q Is the check result normal YES Go to Step 6 NO Repair the damaged connector STEP 6 Wiring harness check between C 313 ETACS ECU connector terminal No 15 and C 45 ASC OFF switch connector terminal No 1 Check the power supply circuit for short circuit Q Is the check result normal YES Go to Step 7 NO Repair the wiring harness between C 313 ETACS ECU connector terminal No 15 and C 45 ASC OFF switch connector terminal No 1 TS
195. ecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS ASC ECU monitors the signals from each wheel speed sensor while the vehicle is being driven If any fault below is found in these sensor signals ASC ECU will set the relevant DTC Missing wheel speed sensor signal Wheel speed sensor signal continuously indicates low value PROBABLE CAUSES Current trouble Excessive gap between the wheel speed sensor and the wheel speed detection encoder Wheel bearing malfunction Deformation of the wheel speed detection encoder Adhesion of foreign materials on the wheel speed sensor Adhesion of foreign materials on the wheel speed detection encoder Malfunction of wheel speed sensor Improper installation of the wheel speed sensor ASC ECU malfunction The number of poles on the Magnetic encoder for wheel speed detection N pole and S pole is changed TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 87 DIAGNOSIS Past trouble When DTC C1015 is als
196. ecting the connector 2 Measure the voltage between the terminal No 16 and the body ground OK When the brake pedal is released 0 V 5V pulse When the brake pedal is depressed Approxi mately battery positive voltage Q Is the check result normal YES Go to Step 21 NO Go to Step 20 STEP 20 Check the wiring harness between C 312 ETACS ECU connector terminal No 16 and C 32 stoplight switch connector terminal No 1 Check the signal line for open circuit Q Is the check result normal YES Go to Step 23 NO Replace the wiring harness STEP 21 Diagnostic trouble code recheck Q Is diagnostic trouble code No C1000 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 22 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 22 Diagnostic trouble code recheck Q Is diagnostic trouble code No C1000 set YES Return to Step 1 NO This diagnosis is complete STEP 23 Diagnostic trouble code recheck Q Is diagnostic trouble code No C1000 set YES Replace the ETACS ECU NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 TSB Revision 35C 158 ACTIVE STABILITY CONTROL SYSTEM ASC DTC C123B Prolonged operation of ASC DIAGNOSIS N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the
197. ection are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS AS wh C ECU monitors the signals from each wheel speed sensor ile the vehicle is being driven If any periodical drop is found in these sensor signals ASC ECU will set the relevant DTC PROBABLE CAUSES Wheel bearing malfunction Deformation of the wheel speed detection encoder Missing teeth of the wheel speed detection encoder Adhesion of foreign materials on the wheel speed detection encoder ASC ECU malfunction The number of poles on the Magnetic encoder for wheel speed detection N pole and S pole is changed DIAGNOSIS Re quired Special Tools MB991958 Scan Tool M U T Ill Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T IIl Main Harness A TSB Revision 35C 100 Wheel bearing Oil seal T ACTIVE STABILITY CONTROL SYSTEM ASC Magnetic encoder AC504925AC DIAGNOSIS STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1042 set YES Go to Step 3 NO The procedure is complete STEP 3
198. ed by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS ASC ECU monitors the signals from each wheel speed sensor while the vehicle is being driven If any fault below is found in these sensor signals ASC ECU will set the relevant DTC Irregular change in the wheel speed sensor signal Wheel speed sensor signal continuously indicates high value PROBABLE CAUSES Current trouble Excessive gap between the wheel speed sensor and the wheel speed detection encoder Adhesion of foreign materials on the wheel speed sensor Adhesion of foreign materials on the wheel speed detection encoder TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 77 DIAGNOSIS Wheel bearing malfunction Malfunction of wheel speed sensor Damaged wiring harness and connectors External noise interference Improper installation of the wheel speed sensor Deformation of the wheel speed detection encoder ASC ECU malfunction Disturbance of magnetization pattern for wheel speed detection encoder The number of poles on the Magnetic encoder for wheel speed detection N pole and S pole is changed Past trouble When DTC C102B is also set carry out diagnosis with par ticular emphasis on wiring harness and connector failures between ASC ECU and the wheel speed sensor For diag nosis procedures refer to How to treat past trouble GROUP 00 How
199. ed signals are sent or received to and from between ASC ECU and engine control module ECM via CAN bus lines TSB Revision 35C 224 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS DTC SET CONDITIONS This DTC is set when the engine control module ECM mal function has been detected PROBABLE CAUSES e Malfunction of engine system Malfunction of engine control module ECM Malfunction of ASC ECU External noise interference DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C l e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 5 STEP 2 Using scan tool MB991958 check the DTC Use scan tool to check that any DTC other than the DTC U0401 is set in ASC ECU Q Is the DTC set YES Troubleshoot the relevant DTC and then go to Step 5 NO Goto Step 3 STEP 3 Using scan tool MB991958 check the other system DTC Use scan tool to check that the DTC is set by the engine control module ECM Q Is the DTC set YES Troubleshoot the relevant DTC and then go to Step 5 NO Go to Step 4 STEP 4 Check whether the DTC is re
200. eed sensor lt FR gt circuit Q Is the check result normal YES Go to Step 15 NO Repair the wiring harness Then go to Step 16 STEP 15 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C101C set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 16 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 16 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C101C set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 67 DTC C1027 Abnormality in RL wheel speed sensor signal Wheel Speed Sensor Circuit PINK WHITE P sIep7I8 ITJHEEEE CHEESE RE E PR LI YELLOW SKY BLUE VIOLET GREEN PINK WHITE N e gt en eo ND e 4 O d 9 Konza 4 O s5 6 7 8 9 ATT 16 1 71
201. eel sensor malfunction e ASC ECU malfunction External noise interference DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T Ill Sub Assembly e MB991824 Vehicle Communication Interface V C l e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A TSB Revision 35C 226 DTC U1003 G and yaw rate sensor bus off ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Replace the steering wheel sensor Refer to P 35C 321 Then go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 3 STEP 2 Check whether the DTC is reset Q Is DTC U0428 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 NO The procedure is complete STEP 3 Check whether the DTC is reset Q Is DTC U0428 set YES Return to Step 1 NO The procedure is complete G and Yaw Rate Sensor Circuit e a J G AND YAW RATE SENSOR 6 137 E WHITE 22 BLACK 1 GRAY 29 ORANGE amp Wd 4 c1 BLUE I gt ae X D 34 V 3 NOTE 1 NON TURBO 2 TURBO 18 19 ASC ECU A 51 I VYaYaYREYREVTYSYGUARTA AA TAA CUBIS t 4344454 WAH35M004A TSB Revision
202. eering wheel sensor TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 322 STEERING WHEEL SENSOR INSTALLATION SERVICE POINT gt gt A lt lt STEERING WHEEL SENSOR CLOCK SPRING COLUMN SWITCH ASSEMBLY INSTAL LATION N CAUTION Be sure to remove the clock spring from the column switch and center the clock spring to prevent the dam age of steering wheel sensor If the center of the clock spring is not correctly aligned the steering wheel may not be turned fully or the cable inside the clock spring may be broken causing the SRS air bag to be inoperative or operated incorrectly 1 Align the mating marks of the clock spring Alignment of mating marks 1 Turn the clock spring clockwise fully 2 Turn the clock spring counterclockwise approximately three and 3 4 turns to align the mating marks 3 Install the clock spring to the column switch Mating marks AC303009AE A CAUTION Always align three mating marks of the steering wheel sensor simultaneously as shown in the figure If these mat ing marks are not aligned correctly the steering wheel sensor may be damaged 2 Align three mating marks of the steering wheel sensor simultaneously as shown in the figure lt Alignment of mating marks gt 1 Check the window for inspecting the neutral position of the steering wheel sensor If the mating marks cannot be seen from the window align the mating marks as shown Steering
203. efer to P 35C 302 Then go to Step 6 NO Reinstall the G and yaw rate sensor correctly Refer to P 35C 320 and then go to Step 12 STEP 6 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 tem 08 Lateral G sensor tem 12 Yaw rate sensor Q Is the check result normal YES Go to Step 9 NO Go to Step 7 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 185 STEP 7 Connector check A 51 ASC ECU connector C 137 G and yaw rate sensor connector Q Is the check result normal YES Go to Step 8 NO Repair the connector and then go to Step 13 STEP 8 Wiring harness check between A 51 ASC ECU connector terminal No 18 and C 137 G and yaw rate sensor connector terminal No 2 as well as between A 51 ASC ECU connector terminal No 19 and C 137 G and yaw rate sensor connector terminal No 3 Check the communication circuit for open and short circuit Q Is the check result normal YES Replace the G and yaw rate sensor Refer to P 35C 320 and then go to Step 12 NO Repair the wiring harness and then go to Step 13 STEP 9 Steering wheel sensor installation check Check that the steering wheel sensor is installed correctly Q Is the check result normal YES Go to Step 10 NO Reinstall the steering wheel sensor correctly Refer to P 35C 321 and then go to Step 10 STEP 10 Wheel alignment check Refer to GROUP 33 On vehicles se
204. eleased OFF NOTE A S C TCL off switch The ASC OFF switch is pressed ON input The ASC OFF switch is not operated e 1 The G and yaw rate sensor does not detect longitudinal acceleration of a vehicle thus 0 G is always set e When the ASC OFF switch is pressed and held for 15 seconds the ASC system returns to the ON sta tus TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 294 DIAGNOSIS ACTUATOR TEST REFERENCE TABLE M1355001600235 Using scan tool the following actuators can be forc While the actuator test is performed the ABS ibly operated warning light flashes at a rate of 2 Hz NOTE e After the actuator test has been performed the e ABS and ASC are operated by ASC ECU brake warning light ABS warning light ASC When ASC ECU is disabled due to the fail safe operation display and ASC OFF display illumi function the actuator test cannot be performed nate until the ignition switch is turned to ON again The actuator test can be performed only when or the communication between scan tool and the vehicle is stationary ASC ECU is terminated Actuator test specifications Check item Driven component FL wheel ABS drive Solenoid valve for the corresponding FR wheel ABS drive channel of the hydraulic unit and pump RL wheel ABS drive motor simplified inspection mode RR wheel ABS drive FL wheel TCL drive FR wheel TCL drive RL wheel TCL drive
205. ems 01 to 04 Check the installation status of corresponding wheel speed sensor Refer to P 35C 316 NO Abnormality with items 08 12 Check the installation status of G and yaw rate sensor Refer to P 35C 320 NO Abnormality with item 11 Check the installation status of steering wheel sensor Refer to P 35C 321 STEP 7 Hydraulic unit check Carry out the following actuator tests and check if they work normally Refer to P 35C 294 e Item No 01 FL wheel ABS Item No 02 FR wheel ABS Item No 03 RL wheel ABS Item No 04 RR wheel ABS Item No 05 FL wheel TCL Item No 06 FR wheel TCL Item No 07 RL wheel TCL Item No 08 RR wheel TCL Q Is the check result normal YES Go to Step 8 NO Replace the hydraulic unit integrated with ASC ECU Refer to P 35C 311 Then go to Step 9 STEP 8 ABS skid control TCL operation check Q Is the check result normal YES Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 NO Replace the hydraulic unit integrated with ASC ECU Refer to P 35C 311 Then go to Step 9 STEP 9 ABS skid control TCL operation check Q Is the check result normal YES The procedure is complete NO Return to Step 1 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 280 DIAGNOSIS Inspection Procedure 14 Steering wheel sensor power supply circuit system Steering Wheel Sensor Power Supply Circuit
206. en go to Step 8 NO The procedure is complete STEP 8 Check whether the DTC is reset Q Is DTC C1210 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 179 DIAGNOSIS DTC C1242 Abnormality in G and yaw rate sensor Abnormality in longitudinal G sensor output signal lt AWD gt G and Yaw Rate Sensor Circuit e a J WHITE GRAY r3 c1 BLUE D EN 4D d co G AND YAW RATE SENSOR I 6 137 A Keno 3 LLI e 3l 19 ASC ECU oE 6 Connector A 51 AC802702 AF WAH35M005A AC802706BG A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal Do not drop or shock the G and yaw rate sensor When the G and yaw rate sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 302 When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 TSB Revision x ACTIVE STABILITY CONTROL SYSTEM AS
207. ensor RL is installed Discon nection of wheel speed sensor loose mounting bolt etc Q Is the check result normal YES Go to Step 5 NO Reinstall the wheel speed sensor lt RL gt correctly Refer to P 35C 316 Then go to Step 9 STEP 5 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 6 NO Replace the wheel speed sensor lt RL gt Refer to P 35C 316 Then go to Step 9 STEP 6 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the Rear wheel hub assembly RL FWD gt Refer to GROUP 27A On vehicle Service P 27A 5 e Check the wheel bearing lt RL AWD gt for looseness Refer to GROUP 27B On vehicle Service P 27B 1 7 Q Is the check result normal YES Go to Step 7 NO FWD Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 NO AWD Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 TSB Revision 35C 92 ACTIVE STABILITY CONTROL SYSTEM ASC lt FWD gt Ball bearing Magnetic Rear ie 7 encoder Oil seal lt AWD gt Rear wheel bearing o 1 Magnetic encoder 4 Rear hub assembly AC704785AB DIAGNOSIS STEP 7 Check of wheel speed detection encode
208. enter differential ACD By the integrated control with the anti skid brake system ABS the system stabilizes the vehicle attitude and at the same time secures the driving force TSB Revision 35C 4 ACTIVE STABILITY CONTROL SYSTEM ASC GENERAL INFORMATION CONSTRUCTION DIAGRAM lt Except Color liquid crystal display gt lt Color liquid crystal display gt Tis 11 11 11 i BRAKE Vehicl f BRAKE Pd Vehicles for USA le erica Tur CANADA Plena fer USA joe vehicles tov CANADAS 9g adb N 9 3 14 10 10 Y N N N SERVICE ABS SERVI BRAKE SYS SERV EQUIRED CHECK REQUIRED eo REQUIRED SERVICE REQUIRED SERVICE REQUIRED AWD AC901704AB TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC GENERAL INFORMATION MAIN COMPONENTS AND FUNCTIONS 35C 5 Name of part Functional description Sensor Actuator Wheel speed sensor Outputs the frequency signal in proportion to the rotation speed of each wheel to ASC ECU Magnetic encoder for wheel speed detection Stop light switch G amp yaw rate sensor When the magnetic encoder for wheel speed detection a plate on which north and south pole sides of the magnets are arranged alternately rotates the wheel speed sensor outputs frequency pulse signal in proportion to each wheel speed Outputs the signal indi
209. eplace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 8 STEP 8 Retest the system Q Does the ASC warning display and light turn ON and OFF normally YES The procedure is complete NO Return to Step 1 TSB Revision 35C 256 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS Inspection Procedure 8 ASC OFF display stays ON after the engine is started ETACS ECU C 313 TT2ISATES ISTE Ch 9 AH ua 15 mm CA o 4 C 36 1 2 3 4 5 6 7 8 9 qa aad tee o a 1 r SWITCH OFF f x 3 4 5 6 Z ll ea x ce lt EN ea AC803038 Connectors C 36 C 45 Connector C 313 Pa Junction block AC802706BH AC608152 AW TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 257 DIAGNOSIS A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Trouble code diagnosis P 54C 9 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 3
210. er Released ABS warning light is OFF Refer to P 35C 241 NO Goto Step 3 STEP 3 Using scan tool MB991958 diagnose the CAN bus line Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 4 NO Repair the CAN bus lines Refer to GROUP 54C Troubleshooting P 54C 16 Then go to Step 14 STEP 4 Using scan tool MB991958 check the DTC Use scan tool MB991958 to check the DTC for the ASC sys tem Q Is the DTC set YES Carry out the diagnosis for the diagnostic trouble code Refer to P 35C 27 NO Go to Step 5 STEP 5 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 Item 120 Parking brake switch Input Q Is the check result normal YES Go to Step 6 NO Carry out the Inspection procedure 3 Brake Warning light Stays ON with the Parking Brake Lever Released ABS warning light is OFF Refer to P 35C 241 and then go to Step 14 STEP 6 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 tem 09 G sensor tem 12 Yaw rate sensor Q Is the check result normal YES Go to Step 10 NO Go to Step 7 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 287 DIAGNOSIS STEP 7 Connector check A 51 ASC ECU connector C 137 G and yaw rate sensor Q Is the check result normal YES Go to Step 8 NO Repair the connector and then go to Step 14
211. er the DTC is reset Q Is DTC C2204 set YES Return to Step 1 NO The procedure is complete DTC C2111 Brake Fluid Pressure Sensor Power Supply Circuit Low input DTC C2112 Brake Fluid Pressure Sensor Power Supply Circuit High input N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION When the brake pedal is depressed the brake fluid pressure sensor integrated in the hydraulic unit detects the brake fluid pressure applied from the master cylinder converts the pres sure value into voltage signal and outputs it DTC SET CONDITIONS This DTC is set when the voltage applied to the pressure sen sor is not within the standard value range TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 190 DIAGNOSIS PROBABLE CAUSES ASC ECU malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C l e MB991827 M U T III USB Cable e MB991910 M
212. er to P 35C 311 Then go to Step 9 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 9 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1035 set YES Return to Step 1 NO The procedure is complete DTC C1041 Abnormality in periodical signal for FL wheel speed sensor A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the w
213. ery in good condition YES Go to Step 5 NO Charge or replace the battery Then go to Step 4 STEP 4 Charging system check Refer to GROUP 16 Charging System P 16 4 Q Is the check result normal YES Go to Step 5 NO Repair or replace the charging system component s STEP 5 Check whether the DTC is reset Q Is DTC C2101 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 6 NO The trouble can be an intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 6 Check whether the DTC is reset Q Is DTC C2101 set YES Return to Step 1 NO The procedure is complete TSB Revision a ACTIVE STABILITY CONTROL SYSTEM ASC 35C 164 DIAGNOSIS DTC C121C Torque request signal rejection A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal Do not drop or shock the G and yaw rate sensor When the G and yaw rate sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 302 When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pre
214. es Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1035 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the DTC Check that the DTC C102B is also set Q Is the DTC C102B also set YES Perform the diagnosis for the DTC C102B Refer to P 35C 47 NO Goto Step 4 STEP 4 Check for wheel speed sensor installation Check how the wheel speed sensor lt RR gt is installed Discon nection of wheel speed sensor loose mounting bolt etc Q Is the check result normal YES Go to Step 5 NO Reinstall the wheel speed sensor RR correctly Refer to P 35C 316 Then go to Step 9 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 95 lt FWD gt Ball bearing Magnetic Rear pot encoder Oil seal lt AWD gt Rear wheel bearing 7 Magnetic encoder u Rear hub assembly AC704785AB DIAGNOSIS STEP 5 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 6 NO Replace the wheel speed sensor RR Refer to P 35C 316 Then go to Step 9 STEP 6 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e
215. esult normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1044 set YES Go to Step 3 NO The procedure is complete STEP 3 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the Rear wheel hub assembly RL FWD gt Refer to GROUP 27A On vehicle Service P 27A 5 e Check the wheel bearing lt RL AWD gt for looseness Refer to GROUP 27B On vehicle Service P 27B 1 7 Q Is the check result normal YES Go to Step 4 NO FWD Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 NO AWD Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 TSB Revision 35C 106 ACTIVE STABILITY CONTROL SYSTEM ASC lt FWD gt Ball bearing Magnetic Rear ie 7 encoder Oil seal lt AWD gt Rear wheel bearing 1 Magnetic encoder 4 Rear hub assembly AC704785AB DIAGNOSIS STEP 4 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 5 NO Presence of foreign materials Remove the fo
216. f wheel speed sensor loose mounting bolt etc Q Is the check result normal YES Go to Step 5 NO Reinstall the wheel speed sensor FL correctly Refer to P 35C 316 Then go to Step 9 STEP 5 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 6 NO Replace the wheel speed sensor FL Refer to P 35C 316 Then go to Step 9 STEP 6 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the wheel bearing FL for looseness Refer to GROUP 26 On vehicle Service P 26 10 Q Is the check result normal YES Go to Step 7 NO Replace the wheel bearing Refer to GROUP 26 Front axle hub assembly P 26 16 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 85 92 Les Oil seal Magnetic encoder Wheel bearing AC504925AC DIAGNOSIS STEP 7 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 8 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction NO Deformation Replace the wheel bearing Refer to GROUP 26 Front axle
217. following service data Refer to P 35C 291 Item No 02 FR wheel speed sensor Q Is the check result normal YES Go to Step 10 NO Goto Step 4 STEP 4 Connector check A 51 ASC ECU connector A 02 wheel speed sensor FR connector Q Is the check result normal YES Go to Step 5 NO Repair the defective connector Then go to Step 11 STEP 5 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool to ASC ECU 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 34 and the body ground and between the ground terminal No 33 and the body ground OK 1 volt or less Q Is the check result normal YES Go to Step 6 NO Not normal at the terminal No 34 or No 33 Go to Step 8 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 39 Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869DB Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606870BM DIAGNOSIS STEP 6 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect
218. foreign materials on the wheel speed detection encoder Wheel bearing malfunction Malfunction of wheel speed sensor Damaged wiring harness and connectors External noise interference Improper installation of the wheel speed sensor Deformation of the wheel speed detection encoder ASC ECU malfunction Disturbance of magnetization pattern for wheel speed detection encoder The number of poles on the Magnetic encoder for wheel speed detection N pole and S pole is changed TSB Revision 35C 62 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS Past trouble When DTC C1015 is also set carry out diagnosis with par ticular emphasis on wiring harness and connector failures between ASC ECU and the wheel speed sensor For diag nosis procedures refer to How to treat past trouble GROUP 00 How to Cope with Intermittent Malfunction P 00 13 e When DTC C1015 is not set the following conditions may be present e Some wheels slip Unstable vehicle attitude External noise interference Vehicle ran with the parking brake applied DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C 1 e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 N
219. g system failed Steering wheel sensor malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Connector check C 211 steering wheel sensor connector Q Is the check result normal YES Go to Step 2 NO Repair the damaged connector TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 282 DIAGNOSIS STEP 2 Resistance measurement at C 211 steering wheel sensor connector 1 Disconnect C 211 steering wheel sensor connector and measure the resistance available at the wiring harness side of the connector 2 Check the continuity between C 211 steering wheel sensor connector terminal No 5 and body ground OK Continuity exists 2 O or less Q Is the check result normal YES Go to Step 4 NO Goto Step 3 STEP 3 Check the wiring harness between C 211 steering wheel sensor connector terminal No 5 and the body ground Check the ground wires for open circuit Q Is the check result normal YES If a trouble is solved it is determined that there is an intermittent malfunction such as poor engaged connector s or open circuit Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 NO Repair the wiring harness STEP 4 Connector check C 309 ETACS ECU connector C 317 ETACS ECU con
220. generated V voltage Lateral G sensor Lateral G of G and yaw rate sensor when the DTC is G generated G sensor Longitudinal G of G and yaw rate sensor when the G DTC is generated Master cylinder Master cylinder pressure of Master cylinder pressure pressure sensor when the DTC is generated Steering angle Steering angle of steering wheel sensor when the DTC is generated Yaw rate sensor Yaw rate of G and yaw rate sensor when the DTC is generated Stop light switch Stop light switch condition when the DTC is generated OFF ON Pump motor Pump motor condition when the DTC is generated OFF ON ASC TCL off switch ASC OFF switch condition when the DTC is generated OFF ON ABS control ABS control when the DTC is generated OFF ON Brake TCL control Traction control brake control when the DTC is generated OFF ON Engine TCL control Traction control engine control when the DTC is generated OFF ON ASC control ASC control when the DTC is generated OFF ON Brake TCL operation Traction control brake control operation when the DTC is generated Permission Prohibition FL wheel speed Wheel speed FL when the DTC is generated sensor FR wheel speed Wheel speed FR when the DTC is generated sensor RL wheel speed Wheel speed RL when the DTC is generated sensor RR wheel speed Wheel speed RR when the DTC is generated sensor TSB Revision
221. h multi purpose fuse No 12 e ASC ECU contains the power supply circuit terminal No 1 for the pump motor The pump motor is energised by the motor switch which is incorporated in ASC ECU When malfunction occurs in ASC ECU power supply the communication with scan tool becomes unavailable PROBABLE CAUSES Damaged wiring harness and connectors Fuse and fusible link malfunction Improper tightening of battery terminal Improper tightening of ground bolt Battery failure Charging system failed ASC ECU malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Battery check Refer to GROUP 54A Battery Test P 54A 8 Q Is the battery in good condition YES Go to Step 3 NO Charge or replace the battery Then go to Step 2 STEP 2 Charging system check Refer to GROUP 16 Charging System P 16 4 Q Is the charging system in good condition YES Go to Step 3 NO Repair or replace the charging system component s STEP 3 Connector check A 51 ASC ECU connector C 128 intermediate connector C 317 ETACS ECU connector C 315 ETACS ECU connector Q Is the check result normal YES Go to Step 4 NO Repair the damaged connector TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 269
222. he CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1047 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the DTC Check that the DTC C1015 C101C C101F or C1042 is also set Q Is the DTC C1015 C101C C101F or C1042 also set YES Carry out the diagnosis for the relevant DTCs and then go to Step 5 NO Goto Step 4 STEP 4 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 Item No 02 FR wheel speed sensor Q Is the check result normal YES Go to Step 14 NO Goto Step 5 STEP 5 Connector check A 51 ASC ECU connector A 02 wheel speed sensor lt FR gt connector Q Is the check result normal YES Go to Step 6 NO Repair the defective connector Then go to Step 15 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 1 16 DIAGNOSIS STEP 6 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool to ASC ECU 2 Turn the ignition switch to the ON po
223. heel speed sensor circuit If ASC ECU detects the open or short circuit in the circuit it will set a DTC PROBABLE CAUSES Current trouble Damaged wiring harness and connectors Noise interference Malfunction of wheel speed sensor Malfunction of ASC ECU Past trouble Carry out diagnosis with particular emphasis on wiring har ness and connector failures between ASC ECU and the wheel speed sensor For diagnosis procedures refer to How to treat past trouble GROUP 00 How to Cope with Intermittent Malfunction P 00 13 DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness TSB Revision 35C 38 ACTIVE STABILITY CONTROL SYSTEM ASC Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869DA DIAGNOSIS STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1015 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the data list Check the
224. heel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 97 DIAGNOSIS DTC SET CONDITIONS ASC ECU monitors the signals from each wheel speed sensor while the vehicle is being driven If any periodical drop is found in these sensor signals ASC ECU will set the relevant DTC PROBABLE CAUSES Wheel bearing malfunction Deformation of the wheel speed detection encoder Missing teeth of the wheel speed detection encoder Adhesion of foreign materials on the wheel speed detection encoder ASC ECU malfunction The number of poles on the Magnetic encoder for wheel speed detection N pole and S pole is changed DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1041 set YES Go to Step 3 NO The procedure is complete STEP 3 Check for wheel bearing looseness NOTE Loose wheel bearing may
225. heh IND x Al PINK WHITE RED BLACK O C D 9 LH A 07 RH A 02 LH r 2i RH F 02 9 FRONT WHEEL SPEED SENSOR REAR WHEEL SPEED SENSOR WAS35M000A Connectors A 02 A 51 AC802869AD TSB Revision 35C 114 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse
226. hen go to Step 5 NO Ifa trouble is solved it is determined that there is an intermittent malfunction such as poor engaged connector s or open circuit Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 5 Check whether the DTC is reset 1 Ignition switch LOCK OFF 2 Ignition switch ON Q Is DTC C2203 set YES Return to Step 1 NO The procedure is complete TSB Revision a ACTIVE STABILITY CONTROL SYSTEM ASC 35C 174 DIAGNOSIS DTC C2206 Re execution of variant coding N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Before replacing the ECU ensure that the communica tion circuit is normal When DTC C2206 is set in ASC ECU the DTC may also be set in ETACS ECU When the DTC is set in ETACS ECU carry out the diagnosis of the DTC for ETACS ECU first When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU receives the vehicle information stored in the ETACS ECU via CAN bus lines DTC SET CONDITIONS ASC ECU compares the last vehicle information received from ETACS ECU with the previous vehicle information
227. hen measure the voltage at the special tool connector side 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 36 and body ground and between the ground terminal No 37 and body ground OK Terminal No 36 and body ground Battery posi tive voltage Terminal No 37 and body ground 1 volt or less Q Is the check result normal YES Go to Step 8 NO Go to Step 10 STEP 8 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 9 NO Replace the wheel speed sensor lt RL gt Refer to P 35C 316 Then go to Step 11 STEP 9 Wiring harness check between A 51 ASC ECU connector terminal No 36 and F 21 wheel speed sensor lt RL gt connector terminal No 1 and between A 51 ASC ECU connector terminal No 37 and F 21 wheel speed sensor lt RL gt connector terminal No 2 Check for open or short circuit in wheel speed sensor lt RL gt circuit Q Is the check result normal YES Go to Step 10 NO Repair the wiring harness Then go to Step 11 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 46 DIAGNOSIS STEP 10 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1020 set
228. hen the parking brake switch is turned ON the combina tion meter terminal No 4 is grounded and then the brake warning light illuminates When reduction of the brake fluid amount is detected the brake fluid level switch is turned from ON to OFF ETACS ECU monitors the brake fluid level switch and instructs the combination meter via the CAN bus line to illu minate the brake warning light COMMENTS ON TROUBLE SYMPTOM This may be caused by the ground fault in the parking brake switch circuit and the open circuit in the brake fluid level switch circuit PROBABLE CAUSES The brake pad thickness is at the limit value or less The brake fluid amount is at the LOWER level or lower Poor adjustment of the parking brake lever Damaged wiring harness and connectors Parking brake switch malfunction Brake fluid level switch malfunction Combination meter malfunction Malfunction of ETACS ECU TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 243 DIAGNOSIS DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostics table P 54C 9 On c
229. hich the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed TSB Revision ACTIVE STABILIT Y CONTROL SYSTEM ASC DIAGNOSIS 35C 83 DTC SET CONDITIONS AS wh the C ECU monitors the signals from each wheel speed sensor ile the vehicle is being driven If any fault below is found in se sensor signals ASC ECU will set the relevant DTC Missing wheel speed sensor signal Wheel speed sensor signal continuously indicates low value PROBABLE CAUSES Cu rrent trouble Excessive gap between the wheel speed sensor and the wheel speed detection encoder Wheel bearing malfunction Deformation of the wheel speed detection encoder Adhesion of foreign materials on the wheel speed sensor Adhesion of foreign materials on the wheel speed detection encoder Malfunction of wheel speed sensor Improper installation of the wheel speed sensor ASC ECU malfunction The number of poles on the Magnetic encoder for wheel speed detection N pole and S pole is changed Past trouble When DTC C100A is also set carry out diagnosis with par ticular emphasis on wiring
230. iagnosis P 54C 9 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION e ASC ECU sends the illumination request signal of the ABS warning light to the combination meter through ETACS ECU via CAN communication e ASC ECU illuminates the ABS warning light via ETACS ECU for approximately 3 seconds for valve check with the ignition switch turned to the ON position COMMENTS ON TROUBLE SYMPTOM This may be caused by faults in the CAN bus line ETACS ECU combination meter or ASC ECU PROBABLE CAUSES Damaged wiring harness and connectors Malfunction of ETACS ECU Combination meter malfunction ASC ECU malfunction Control stop due to the low voltage NOTE Due to the abnormality in the supply voltage the DTC may not be set even when the ABS warning light is illuminated DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A TSB Revision s ACTIVE STABILITY CONTROL SYSTEM ASC 35C 252 DIAGNOSIS STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines
231. ic trouble code diagnosis P 54C 14 If the DTC C1290 is set in ASC ECU always diagnose the CAN bus line If there is any fault in the CAN bus lines an incorrect DTC may be set In this case the set DTC is not highly reliable Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 When the DTC C1290 is set in ASC ECU the DTC for another system may also be set When the DTC for another system is set carry out diagnosis for that sys tem first OPERATION ASC ECU receives signals necessary for the operations of ABS and skid control from the engine control module ECM TCM ETACS ECU and the steering wheel sensor via the CAN bus lines DTC SET CONDITIONS ASC ECU receives signals necessary for the operations of ABS and skid control from the engine control module ECM TMC ETACS ECU and steering wheel sensor via CAN bus lines This DTC is stored when ASC ECU cannot receive the signals necessary for the operations of ABS and skid control from the engine control module ECM TCM ETACS ECU and steering wheel sensor PROBABLE CAUSES Engine control module ECM malfunction TCM malfunction Steering wheel sensor malfunction Malfunction of the CAN bus ASC ECU malfunction
232. ic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C2003 set YES Go to Step 3 NO The procedure is complete STEP 3 Scan tool other system diagnostic trouble code Use scan tool to check whether any coding related diagnostic trouble code is set by ETACS ECU Q Is the DTC set YES Troubleshoot for the relevant diagnostic trouble code Refer to GROUP 54A ETACS ECU Check chart for diagnostic trouble codes P 54A 674 Then go to Step 8 NO Goto Step 4 STEP 4 Check part number of ASC ECU Check the part number of ASC ECU Q Is the check result normal YES Go to Step 5 NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 8 TSB Revision s ACTIVE STABILITY CONTROL SYSTEM ASC 35C 21 0 DIAGNOSIS STEP 5 ETACS ECU coding data check Refer to GROUP 00 Coding List P 00 28 Vehicle line OK LANCER H B Transmission OK TC SST Engine type OK 2 0L D4 VVT T C Engine power OK Normal Chassis type for A S C OK Type 6 Final drive OK AWD FF Base Transfer OK ACD SAS OK Present 4WD AWD OK Not present TCM OK Present ACDAYC OK Present Q Is the check result normal YES Go to Step 6 NO Replace the ETACS ECU Refer to GROUP 54A ETACS ECU P 54A 769 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 211 DIAGNOSIS STEP 6 Check part number of ETACS ECU Check the
233. ic table P 54C 16 On completion go to Step 6 STEP 2 Using scan tool MB991958 check the DTC Check that the DTCs U0100 U0101 U0126 and U0141 are set in ASC ECU Q Is the DTC set YES Troubleshoot for the relevant DTC Refer to P 35C 27 Then go to Step 6 NO Goto Step 3 STEP 3 Using scan tool MB991958 other system check the DTC Using scan tool check if the DTCs are set from the engine con trol module ECM TC SST ECU AWC ECU ETACS ECU and steering wheel sensor or not Q Is the DTC set YES Troubleshoot the relevant DTC and then go to Step 6 NO Goto Step 4 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 171 DIAGNOSIS STEP 4 ETACS ECU coding data check Refer to GROUP 00 Coding List P 00 28 Vehicle line OK LANCER H B Transmission OK TC SST Engine type OK 2 0L D4 VVT T C Engine power OK Normal Chassis type for A S C OK Type 6 Final drive OK AWD FF Base Transfer OK ACD SAS OK Present 4WD AWD OK Not present TCM OK Present ACDAYC OK Present Q Is the check result normal YES Go to Step 5 NO Replace the ETACS ECU Refer to GROUP 54A ETACS ECU P 54A 769 and then go to Step 6 STEP 5 Check whether the DTC is reset Q Is DTC C1290 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 6 NO Ifthe trouble symptom is resolved an intermittent malfunction such as poorly engaged connector s or w
234. id pressure sensor power supply circuit Low input Brake fluid pressure sensor power supply circuit High input P 35C 189 Abnormality in G and yaw rate sensor operation voltage Low voltage Abnormality in G and yaw rate sensor operation voltage High voltage P 35C 191 Abnormality in sensor calibration P 35C 195 Abnormality in steering wheel sensor signal P 35C 197 Abnormality in steering wheel sensor calibration Steering wheel sensor neutral point not learned P 35C 200 Internal abnormality in steering wheel sensor Brake fluid filling not completed Implausible diagnosis data P 35C 201 P 35C 203 P 35C 212 Valve calibration not completed P 35C 204 Control parameter not implement P 35C 205 2 P 35C 208 3 Bus off TSB Revision P 35C 217 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS Item 35C 29 Reference page Engine time out error 2 CVT time out error TC SST time out error Steering wheel sensor time out error AWC time out error ETACS time out error P 35C 218 2 P 35C 218 3 G and yaw rate sensor message time out error message error P 35C 221 Engine signal malfunction detected Communication error in steering wheel sensor P 35C 223 P 35C 225 G and yaw rate sensor bus off P 35C 226 Variant coding not implemented P 35C 229 NOTE Variant codi
235. ight keeps illuminating Q Is DTC U1415 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 231 DIAGNOSIS DTC U1417 Variant coding value invalid includes faulty installation lt FWD gt A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 If DTC U1417 is set in ASC ECU always diagnose the CAN bus lines If there is any fault in the CAN bus lines an incorrect DTC may be set In this case the set DTC is not highly reliable Before replacing the ECU ensure that the communica tion circuit is normal When DTC U1417 is set in ASC ECU the DTC may also be set in ETACS ECU When the DTC is set in ETACS ECU carry out the diagnosis of the DTC for ETACS ECU first When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU receives the vehicle information stored in the ETACS ECU via CAN bus lines DTC SET CONDITIONS ASC ECU communicates with ETACS ECU via CAN bus lines This DTC is set when the vehicle information received from the ETACS ECU is invalid PROBABLE CAUSES Malfunction of
236. inal No 45 or No 46 Go to M Step 9 A 51 ASC ECU harness connector AC606869CZ TSB Revision MB991997 A 51 ASC ECU harness connector ACTIVE STABILITY CONTROL SYSTEM ASC 35C 111 Check harness ASC ECU AC606870BL DIAGNOSIS STEP 8 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the ASC ECU side connector and harness side connector and then measure the voltage at the special tool connector side 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 45 and body ground and between the ground terminal No 46 and body ground OK Terminal No 45 and body ground Battery posi tive voltage Terminal No 46 and body ground 1 volt or less Q Is the check result normal YES Go to Step 9 NO Go to Step 14 STEP 9 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 10 NO Replace the wheel speed sensor FL Refer to P 35C 316 Then go to Step 15 STEP 10 Wiring harness check between A 51 ASC ECU connector terminal No 45 and A 07 wheel speed sensor FL connector terminal No 1 and between A 51 ASC ECU connector terminal No 46 and A 07 wheel speed sensor FL connector terminal No 2 Check for o
237. increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the wheel bearing FL for looseness Refer to GROUP 26 On vehicle Service P 26 10 Q Is the check result normal YES Go to Step 4 NO Replace the wheel bearing Refer to GROUP 26 Front axle hub assembly P 26 16 TSB Revision 35C 98 ACTIVE STABILITY CONTROL SYSTEM ASC 92 Les Oil seal Magnetic encoder Wheel bearing AC504925AC DIAGNOSIS STEP 4 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 5 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction When the encoder is deformed replace the wheel bearing NO Deformation Replace the wheel bearing Refer to GROUP 26 Front axle hub assembly P 26 16 STEP 5 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1041 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 6 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Inte
238. ing harness check between A 51 ASC ECU connector terminal No 43 and F 02 wheel speed sensor RR connector terminal No 1 and between A 51 ASC ECU connector terminal No 42 and F 02 wheel speed sensor RR connector terminal No 2 e Check for open or short circuit in wheel speed sensor RR circuit Q Is the check result normal YES Go to Step 10 NO Repair the wiring harness Then go to Step 11 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 52 DIAGNOSIS STEP 10 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C102B set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 11 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 11 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C102B set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 53 DTC C1011 Abnormality in FL wheel speed sensor signal Wheel Speed Sensor Circuit
239. ired Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 173 DIAGNOSIS STEP 2 DTC recheck after resetting CAN bus lines 1 Ignition switch LOCK OFF 2 Ignition switch ON Q Is DTC C2203 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the DTC Check that the engine control module ECM sets a DTC Refer to GROUP 13A Trouble shooting P 13A 50 lt AWD gt or GROUP 13B Trouble shooting P 13B 51 lt FWD gt Q Is any DTC set YES lt AWD gt Troubleshoot the engine control module ECM DTC Refer to GROUP 13A Troubleshooting P 13A 50 and then go to Step 5 YES lt FWD gt Troubleshoot the engine control module ECM DTC Refer to GROUP 13B Troubleshooting P 13B 51 and then go to Step 5 NO Goto Step 4 STEP 4 Check whether the DTC is reset 1 Ignition switch LOCK OFF 2 Ignition switch ON Q Is DTC C2203 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and t
240. iring harness is suspected Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 6 Check whether the DTC is reset Q Is DTC C1290 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 172 DIAGNOSIS DTC C2203 VIN not recorded N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 When other DTC for ASC ECU is set troubleshoot that DTC first Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU receives vehicle information from the engine control module ECM and stores it DTC SET CONDITIONS This diagnostic trouble code is set when ASC ECU cannot receive the vehicle information after the ignition switch is turned ON from the engine control module ECM PROBABLE CAUSES Malfunction of the CAN bus Engine control module ECM malfunction ASC ECU malfunction When the ignition switch is turned to the ON position for the first time after the ASC ECU is replaced DIAGNOSIS Requ
241. is diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS ASC ECU monitors the signals from each wheel speed sensor while the vehicle is being driven If any fault below is found in these sensor signals ASC ECU will set the relevant DTC Irregular change in the wheel speed sensor signal Wheel speed sensor signal continuously indicates high value PROBABLE CAUSES Current trouble Excessive gap between the wheel speed sensor and the wheel speed detection encoder Adhesion of foreign materials on the wheel speed sensor Adhesion of
242. is reset Q Is the relevant DTC set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 4 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 4 Check whether the DTC is reset Q Is the relevant DTC set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 135 DTC C2104 Faulty valve power supply circuit Solenoid Valve and Motor Power Supply Circuit HYDRAULIC UNIT FUSIBLE FUSIBLE LINK LINKS SOLENOID VALVE MOTOR ORANGE BLUE QV 00 0007 QW QU 00 0007 QW 0007 QW 0007 QW QU 32 1 A vy N y y V y N y N N y yy y SOLENOID SOLENOID MOTOR VALVE vae OR e e e BR GR GH eo e 0 n e e rower POWER POWER Ww m 7T 77 mW 77 Ww 7 mW Um Ww 7 mW SUPPLY SUPPLY SUPPLY MOTOR POWER SUPPLY ASC ECU 16 4 A 51 W9H35M004A N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibrati
243. iscon nection of wheel speed sensor loose mounting bolt etc Q Is the check result normal YES Go to Step 5 NO Reinstall the wheel speed sensor FL correctly Refer to P 35C 316 Then go to Step 16 TSB Revision 35C 56 Oil seal Magnetic encoder _ T Whee L CAO n bearing AC504925AC ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS STEP 5 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 6 NO Replace the wheel speed sensor FL Refer to P 35C 316 Then go to Step 16 STEP 6 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the wheel bearing FL for looseness Refer to GROUP 26 On vehicle Service P 26 10 Q Is the check result normal YES Go to Step 7 NO Replace the wheel bearing Refer to GROUP 26 Front Axle Hub Assembly P 26 16 STEP 7 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 8 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction NO Deformation Replace the wheel bearing Refer t
244. k harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the resistance between terminal No 16 and body ground and between terminal No 47 and body ground OK Continuity exists 2 O or less Q Is the check result normal YES Go to Step 19 Check harness NO An open circuit may be present in the ground circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 16 and the body MB991997 ASC ECU ground and between the A 51 ASC ECU connector terminal No 47 and the body ground A 51 ASC ECU harness connector AC606869NJ STEP 19 Retest the system Make sure that the scan tool cable is properly connected and the V C l switch is ON Q Is the communication with scan tool possible YES Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 NO Replace the ASC ECU Refer to P 35C 311 Then go to Step 20 STEP 20 Retest the system Q Is the communication with scan tool possible YES Return to Step 1 NO This diagnosis is complete Inspection Procedure 13 ABS skid control TCL operates too frequently A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to G
245. k whether the DTC is reset Q Is DTC U1417 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 238 DIAGNOSIS SYMPTOM CHART M1355006900565 A CAUTION ABS may operate in the following conditions without hard braking Low mu road surface high speed turn and bumpy road surface When asking the customers confirm that they have have not encountered ABS operation in corresponding conditions During ABS operation the brake pedal is pulled forward gradually and the noise occurs at the same time This is because the brake line pressure varies intermittently to prevent the wheel lock and not a system malfunction During diagnosis a DTC associated with other system may be set when the ignition switch is turned on with connector s disconnected On completion confirm all systems for DTC s If DTC s are set erase them all Reference page Trouble symptom Inspection procedure number Refer to GROUP 54C Troubleshooti ng P 54C 16 Scan tool cannot communicate with all systems Scan tool cannot communicate with the ABS ASC system Scan tool cannot communicate only with ASC ECU P 35C 239 ASC OFF display flashes at a rate of 2Hz P 35C 240 Brake warning light stays ON with the parking brake lever released ABS warning light is OFF P 35C 241 ABS warning light does not illuminate when ignition
246. leased OFF Lateral G sensor left turn right turn Vehicle stopped level 0 11 to 0 11 G Running 1to1G G sensor deceleration acceleration Master cylinder pressure pressure increase pressure decrease Steering angle left turn right turn Vehicle stopped level 0 G fixed value 0 11 to 0 11 G Except vehicles with HSA 0 04 to 0 04 G Vehicles with HSA gt Running 0 G fixed value The brake pedal is depressed The brake pedal is released Vehicle stopped the steering wheel is in the neutral position Running 1to 1G Increases by the amount of the brake pedal depression 3 to 3 bar 6 to 6 deg Nearly the same as the steering wheel operation angle 720 to 720 deg ASC ECU normal detection value Nearly the same as the steering wheel operation angle 850 to 850 deg Sensor normal value as a single unit Yaw rate sensor left turn right turn Vehicle stopped level 3 6 to 3 6 deg s Running 100 to 100 deg s Brake switch The brake pedal is depressed ON The brake pedal is released OFF Emission test mode Emission test mode ON ON Emission test mode OFF TSB Revision OFF 35C 292 Check item DIAGNOSIS Check condition ACTIVE STABILITY CONTROL SYSTEM ASC Normal condition Brake fluid pressure
247. lem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the steering wheel sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 304 When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 TSB Revision S ACTIVE STABILITY CONTROL SYSTEM ASC 35C 202 DIAGNOSIS OPERATION Steering wheel sensor sends its status signal to ASC ECU DTC SET CONDITIONS This DTC is set when ASC ECU detects that the steering wheel sensor has malfunction PROBABLE CAUSES Steering wheel sensor malfunction ASC ECU malfunction External noise interference DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On
248. lowing two operations Alignment adjustment Front Steering wheel sensor column switch assembly replacement removal installation ASC ECU replacement 1 Update the neutral position stored in the steering wheel sensor 2 Reset the calibrated value of the steering angle stored in ASC ECU A CAUTION Before performing the calibration check if the steering wheel sensor related diagnostic trouble code is set in ASC ECU When the diagnostic trouble code other than C121A is set carry out inspection according to each trouble shooting procedure 1 Place the vehicle on a level surface with its road wheels in the straight ahead position N CAUTION Before connecting or disconnecting the scan tool turn the ignition switch to the LOCK OFF position 2 Set the scan tool with the ignition at LOCK OFF 3 Ignition switch ON 4 Select the relevant system from the menu 5 Select Steering angle sensor from the system list in System select and press OK button Select Special function under Steering angle sensor 7 Select SAS Calibration under Special function NOTE If the steering angle sensor neutral point has been learned the display will show If SAS needs re calibration execute SAS calibration after executing SAS initialization If yes press OK button Oo TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC E ON VEHICLE SERVICE 35C
249. n completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1000 set YES Go to Step 3 NO The procedure is complete STEP 3 Battery check Refer to GROUP 544A Battery Test P 54A 8 Q Is the battery in good condition YES Go to Step 4 NO Charge or replace the battery and go to Step 17 STEP 4 Stoplight operation check Check the stoplight operation when the brake pedal is depressed Check that the stoplight illuminates when the brake pedal is depressed and that it goes out when the brake pedal is released OK When the brake pedal is released OFF When the brake pedal is depressed llluminates Q Is the check result normal YES Go to Step 18 NO Goto Step 5 STEP 5 Check stoplight switch installation Refer to GROUP 35A On vehicle Service Brake Pedal Check and Adjustment P 35A 14 Q Is the check result normal YES Go to Step 6 NO Install the stop light switch correctly Refer to GROUP 35A On vehicle Service Brake Pedal Check and Adjustment P 35A 14 Then go to Step 22 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 153 Continuity No continuity BEEN 4 0 0 5 mm 0 16 0 02 in AC901847AB DIAGNOSIS STEP 6 stop light switch continuity check 1 Remove the stoplight switch Refer to GROUP 35A Brake Pedal P 35A 31 2 Connect the circuit tester O range to the stoplight switch co
250. n go to Step 4 NO Reinstall the G and yaw rate sensor correctly Refer to P 35C 320 and then go to Step 6 STEP 4 Brake drag check Check the brake system for drag Q Is the check result normal YES Go to Step 5 NO Repair the brake drag and then go to Step 5 STEP 5 Retest the system Check if the HSA works on a flat road with one occupant driver only in the vehicle Q Does the HSA work on a flat road YES Replace the G and yaw rate sensor Refer to P 35C 320 Then go to Step 6 NO Goto Step 6 STEP 6 Retest the system Check if the HSA works on a flat road with one occupant driver only in the vehicle Q Does the HSA work on a flat road YES Return to Step 2 NO This diagnosis is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC Check item DIAGNOSIS DATA LIST REFERENCE TABLE The following items can be read by the scan tool from the ASC ECU input data Check condition 35C 291 M1355001500614 Normal condition FL wheel speed sensor FR wheel speed sensor RL wheel speed sensor RR wheel speed sensor Perform a test run of the vehicle The speedometer display and the scan tool display almost agree with each other During stop approximately 0 4 mph 0 7km h gt Power supply voltage Battery positive voltage 10 to 18 V ASC operatable range Brake switch input The brake pedal is depressed ON The brake pedal is re
251. n meter Refer to GROUP 54A Combination Meter Trouble Symptom Chart P 54A 73 Then go to Step 7 STEP 4 Using scan tool MB991958 check the other system DTC Using scan tool check that DTC U0141 is not set by the combi nation meter system Q Is the DTC set YES Diagnose the combination meter Refer to GROUP 54A Combination Meter Troubleshooting P 54A 55 Then go to Step 7 NO Goto Step 5 STEP 5 Using scan tool MB991958 check the other system DTC Using scan tool check that DTC U0121 is not set by the ETACS system Q Is the DTC set YES Perform troubleshooting on ETACS ECU Refer to GROUP 54A ETACS Troubleshooting P 54A 683 Then go to Step 7 NO Goto Step 6 STEP 6 Retest the system Q Does the brake warning light turn ON and OFF YES Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 7 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 251 DIAGNOSIS STEP 7 Retest the system Q Does the brake warning light turn ON and OFF normally YES The procedure is complete NO Return to Step 1 Inspection Procedure 6 ABS warning light stays ON after the engine is started A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Trouble code d
252. n switch ON Battery positive voltage Ignition switch OFF Battery positive voltage 8 Ignition switch signal for Ignition switch ON Battery positive ASC ECU activation voltage Ignition switch OFF 1 volt or less 22 G and yaw rate sensor power Ignition switch ON Battery positive supply voltage 32 Solenoid valve power supply Ignition switch ON OFF Battery positive voltage 34 Wheel speed sensor FR power Ignition switch ON Battery positive supply voltage 36 Wheel speed sensor RL power Ignition switch ON Battery positive supply voltage 43 Wheel speed sensor RR power _ Ignition switch ON Battery positive supply voltage 45 Wheel speed sensor FL power Ignition switch ON Battery positive voltage TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 297 Check harness DIAGNOSIS CONTINUITY CHECK AT WIRING HARNESS SIDE CONNECTOR 1 When performing the continuity check turn the ignition switch to LOCK OFF position connect the special tool ASC check harness MB991997 as shown in the figure and disconnect the ASC ECU connector 2 Check for continuity between terminals shown in the chart below 3 Terminal layout is shown in the figure MB991997 ASC ECU A 51 ASC ECU harness connector AC400817BE Terminal No Signal Normal condition 16 body ground Ground Continuity exists 2Q or 47 body ground Ground a TSB Revision
253. nce and magnetic attraction Then go to Step 15 NO Deformation Replace the wheel bearing Refer to GROUP 26 Front axle hub assembly P 26 16 Then go to Step 15 STEP 14 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1046 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 15 NO The procedure is complete STEP 15 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1046 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 1 1 3 DTC C1047 FR wheel speed sensor control phase time exceeded Wheel Speed Sensor Circuit PINK WHITE P sIep7I8 ITJHEEEE CHEESE RE E PR LI YELLOW SKY BLUE VIOLET GREEN PINK WHITE N e gt en eo ND e 4 O d 9 Konza 4 O s5 6 7 8 9 ATT 16 1 71 8r 2921 22 p eo
254. ncor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 If DTC U0001 is set in ASC ECU always diagnose the CAN bus line If there is any fault in the CAN bus lines an incorrect DTC may be set In this case the set DTC is not highly reliable Before replacing the ECU ensure that the communica tion circuit is normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 DTC SET CONDITIONS This DTC is set when ASC ECU has ceased the CAN commu nication bus off COMMENTS ON TROUBLE SYMPTOM Malfunction of wiring harness connector s or ASC ECU may be present PROBABLE CAUSES Wiring harness or connector failure of CAN bus line ASC ECU malfunction Other ECU malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T Ill Sub Assembly e MB991824 Vehicle Communication Interface V C 1 e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 21 8 DIAGNOSIS STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus li
255. nd brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION The hydraulic pressure sensor is incorporated in the hydraulic unit When the brake pedal is depressed the pressure sensor detects the brake pressure applied from the master cylinder converts this pressure into the voltage signal and outputs it DTC SET CONDITIONS This DTCs will be set under the cases below When the pressure sensor offset is not within the standard value range When the estimated pressure sensor temperature is not normal PROBABLE CAUSES Incorrect adjustment of brake pedal height Master cylinder malfunction Brake booster malfunction Incorrect installation position of stoplight switch Malfunction of the stoplight switch Brake drag ASC ECU malfunction TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 147 DIAGNOSIS DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C l e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C121E set YES Go to Step 3 NO The
256. nector Q Is the check result normal YES Go to Step 5 NO Repair the damaged connector STEP 5 Voltage measurement at C 309 ETACS ECU connector 1 Disconnect C 306 ETACS ECU connector and measure the voltage available at the wiring harness side of the connector 2 Measure the voltage between C 309 ETACS ECU connector terminal No 1 and body ground OK Battery positive voltage Q Is the check result normal YES Go to Step 7 NO Goto Step 6 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 283 STEP 6 Check the wiring harness between fusible link No 34 and C 309 ETACS ECU connector terminal No 1 e Check the power supply lines battery power supply for open circuit and short circuit Q Is the check result normal YES If a trouble is solved it is determined that there is an intermittent malfunction such as poor engaged connector s or open circuit Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 NO Repair the wiring harness STEP 7 Measure the voltage at the C 211 steering wheel sensor connector 1 Disconnect C 211 steering wheel sensor connector and measure the voltage at the wiring harness side of the connector 2 Turn the ignition switch to the ON position 3 Measure the voltage between the terminal No 2 and the body ground OK Approximately battery positive voltage Q Is the check result normal YES Go to Step 10 NO Goto
257. nes Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 3 STEP 2 Check whether the DTC is reset Q Is DTC U0001 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 3 NO Ifthe trouble symptom is resolved an intermittent malfunction such as poorly engaged connector s or wiring harness is suspected Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 3 Check whether the DTC is reset Q Is DTC U0001 set YES Return to Step 1 NO The procedure is complete DTC U0100 Engine time out error DTC U0101 CVT or TC SST time out error DTC U0126 Steering wheel sensor time out error DTC U0141 ETACS time out error DTC U0114 AWC time out error N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 If DTCs U0100 U0101 U0126 U0141 and U0114 are set in ASC ECU always diagnose the CAN bus line If there is any fault in the CAN bus lines an incorrect DTC may be set In this case the set DTC is not highly reliable Before replacing the ECU ensure that the communica tion circuit is normal When the steering wheel sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 304 When the hydraulic unit integrated with AS
258. ng value invalid includes faulty installation e 1 This DTC is not set with the vehicle speed of 12 mph 20 km h or less e 2 FWD e 3 AWD TSB Revision P 35C 231 2 P 35C 234 ACTIVE STABILITY CONTROL SYSTEM ASC 35C 30 DIAGNOSIS DIAGNOSTIC TROUBLE CODE PROCEDURES DTC C100A Abnormality in FL wheel speed sensor circuit Wheel Speed Sensor Circuit PINK WHITE 6 5 19 18 C 39 Bra s e 7 8j to ltt 2314 rgrei RE E PR LIS YELLOW SKY BLUE VIOLET GREEN PINK WHITE 4 O AO 6 d 4213141 O 51617181 9 ois alialiei T8 To UU 2 13 T4 To Tet 1819120121 22 PINK WHITE 9 9 9 NT Ne LH A 07 RH A 02 LH F 21 RH F 02 E FRONT WHEEL SPEED SENSOR REAR WHEEL SPEED SENSOR WAS35M000A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 31 DIAGNOSIS Connector A 07 Connector A 51 A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Wheneve
259. ngine type OK 2 0L D4 VVT T C Engine power OK Normal Chassis type for A S C OK Type 6 Final drive OK AWD FF Base Transfer OK ACD SAS OK Present 4WD AWD OK Not present TCM OK Present ACDAYC OK Present Q Is the check result normal YES Go to Step 5 NO Replace the ETACS ECU Refer to GROUP 54A ETACS ECU P 54A 769 and then go to Step 7 STEP 5 Engine control module ECM coding data check Refer to GROUP 00 Coding List P 00 28 Q Is the check result normal YES Go to Step 6 NO Replace the engine control module ECM Refer to GROUP 13A engine control module ECM P 13A 895 gt and then go to Step 7 STEP 6 Check the part number of ETACS ECU Check the part number of ETACS ECU Q Is the check result normal YES Go to Step 7 NO Replace the ETACS ECU Refer to GROUP 54A ETACS ECU P 54A 769 and then go to Step 7 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 237 DIAGNOSIS STEP 7 Check the part number of ASC ECU Check the part number of ASC ECU Q Is the check result normal YES Go to Step 8 NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 9 STEP 8 Check whether the DTC is reset Q Is DTC U1417 set YES Replace the ASC ECU Refer to P 35C 311 and then go to Step 9 NO The trouble can be an intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 9 Chec
260. nnector terminal No 2 e Check for open or short circuit in wheel speed sensor lt RR gt circuit Q Is the check result normal YES Go to Step 11 NO Repair the wiring harness Then go to Step 15 STEP 11 Check for wheel speed sensor installation Check how the wheel speed sensor lt RR gt is installed Discon nection of wheel speed sensor loose mounting bolt etc Q Is the check result normal YES Go to Step 12 NO Reinstall the wheel speed sensor RR correctly Refer to P 35C 316 Then go to Step 15 STEP 12 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the Rear wheel hub assembly RR FWD gt Refer to GROUP 27A On vehicle Service P 27A 5 e Check the wheel bearing RR AWD gt for looseness Refer to GROUP 27B On vehicle Service P 27B 1 7 Q Is the check result normal YES Go to Step 13 NO FWD Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 Then go to Step 15 NO AWD Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 Then go to Step 15 TSB Revision 35C 132 ACTIVE STABILITY CONTROL SYSTEM ASC lt FWD gt Ball bearing Magnetic Rear ie 7 encoder Oil seal lt AWD gt Rear wheel bearing o 1 Magnetic
261. nnector terminals No 1 and 2 3 When no continuity is detected with the plunger pressed from the edge of the outer case by the dimension shown in the figure and when continuity is detected with the plunger released the stoplight switch is in good condition Q Is the check result normal YES Go to Step 7 NO Replace the stoplight switch Refer to GROUP 35A Brake Pedal P 35A 31 Then go to Step 22 STEP 7 ETACS ECU fuse No 2 check Q Is the check result normal YES Go to Step 12 NO Goto Step 8 STEP 8 Connector check C 304 ETACS ECU connector C 312 ETACS ECU connector C 32 stoplight switch connector C 39 Intermediate connector C 38 joint connector D 11 Intermediate connector D 14 Intermediate connector F 30 Intermediate connector F 06 rear combination light stoplight RH connector F 20 rear combination light stoplight LH connector F 10 high mounted stoplight connector Q Is the check result normal YES Go to Step 9 NO Repair the damaged connector and then replace fuse No 2 Then go to Step 22 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 154 DIAGNOSIS STEP 9 Resistance measurement at C 32 stoplight switch connector 1 Disconnect C 32 stop light switch connector and measure at the wiring harness side 2 Disconnect C 312 ETACS ECU connector and C 38 joint connector 3 Measure the resistance between the terminal No 1 and the body ground OK No conti
262. nsor and the wheel speed detection encoder Adhesion of foreign materials on the wheel speed sensor Wheel bearing malfunction Deformation of the wheel speed detection encoder Adhesion of foreign materials on the wheel speed detection encoder Malfunction of wheel speed sensor Improper installation of the wheel speed sensor ASC ECU malfunction The number of poles on the Magnetic encoder for wheel speed detection N pole and S pole is changed TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 94 DIAGNOSIS Past trouble When DTC C102B is also set carry out diagnosis with par ticular emphasis on wiring harness and connector failures between ASC ECU and the wheel speed sensor For diag nosis procedures refer to How to treat past trouble GROUP 00 How to Cope with Intermittent Malfunction P 00 13 e When DTC C102B is not set the following conditions may be present e Some wheels slip Unstable vehicle attitude External noise interference Vehicle ran with the parking brake applied Rotate only two wheels with drum tester DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lin
263. nsure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 CIRCUIT OPERATION ETACS ECU sends the ON signal generated when the brake pedal is depressed and OFF signal generated when it is released to ABS ECU via the CAN bus lines DTC SET CONDITIONS This DTC is set in the following case When the vehicle has run for a long time with the stoplight switch turned ON When the OFF status of the stoplight switch does not match the vehicle attitude PROBABLE CAUSES Improper adjustment of stoplight switch installation position Malfunction of the stoplight switch Damaged wiring harness and connectors Malfunction of ETACS ECU ASC ECU malfunction TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 152 DIAGNOSIS DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 9 O
264. nterface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 265 STEP 1 DTC check Use scan tool to check the DTC for the ASC system Refer to P 35C 27 Q Is the check result normal YES Go to Step 2 NO Carry out the diagnosis for the DTC Refer to P 35C 27 STEP 2 Engine control module coding data check Using scan tool check if any abnormality is present to the cod ing data below which are stored in the engine control module Refer to GROUP 00 Coding List P 00 28 A S C OK Available Q Is the check result normal YES Go to Step 3 NO Replace the engine control module Refer to GROUP 13B ECM P 13B 1022 lt FWD gt or GROUP 13A ECM P 13A 895 lt AWD gt Then go to Step 4 STEP 3 Hydraulic unit integrated with ASC ECU check Check that the brake tube is correctly mounted to the hydraulic unit integrated with ASC ECU Refer to P 35C 299 Q Is the check result normal YES Replace the hydraulic unit integrated with ASC ECU Refer to P 35C 299 Then go to Step 4 NO Connect the brake tubes correctly and repair or replace the external brake lines of the hydraulic unit integrated with ASC ECU STEP 4 Operation check Q Does skid control TCL operate normally YES The procedure is complete NO Check the brake system related components other than the skid control TCL system
265. nuity Q Is the check result normal YES Go to Step 10 NO A short circuit may be present in the wiring harness between C 38 joint connector terminal No 10 and C 32 stoplight switch connector terminal No 1 or between C 312 ETACS ECU connector terminal No 16 and C 32 stoplight switch connector terminal No 1 Repair the wiring harness if necessary and then replace fuse No 2 Then go to Step 22 STEP 10 Resistance measurement at C 32 stop light switch connector 1 Disconnect C 32 stop light switch connector and measure at the wiring harness side 2 Disconnect C 304 ETACS ECU connector 3 Measure the resistance between the terminal No 2 and the body ground OK No continuity Q Is the check result normal YES Go to Step 11 NO A short circuit may be present in the wiring harness between C 304 ETACS ECU connector terminal No 1 and C 32 stoplight switch connector terminal No 2 Repair the wiring harness if necessary and then replace fuse No 2 Then go to Step 22 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 155 STEP 11 Resistance measurement at C 38 joint connector 1 Disconnect C 38 joint connector and measure at the wiring harness side 2 Disconnect F 06 rear combination light stoplight RH connector F 20 rear combination light stoplight LH connector F 10 high mounted stoplight connector 3 Measure the resistance between the terminal No 10 and the body ground
266. o GROUP 26 Front Axle Hub Assembly P 26 16 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 57 DIAGNOSIS STEP 8 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 45 and the body ground and between the ground terminal No 46 and the body ground OK 1 volt or less Q Is the check result normal YES Go to Step 9 Check harness MB991997 ASC ECU NO Not normal at the terminal No 45 or No 46 Go to Step 10 A 51 ASC ECU harness connector AC606869C Y STEP 9 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the resistance between the wheel speed sensor power supply terminal signal terminal No 45 and the body ground and between the ground terminal No 46 and the body ground OK N
267. o GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 9 Check whether the DTC is reset Q Is DTC U1417 set YES Return to Step 1 NO The procedure is complete DTC U1417 Variant coding value invalid includes faulty installation lt AWD gt A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 If DTC U1417 is set in ASC ECU always diagnose the CAN bus lines If there is any fault in the CAN bus lines an incorrect DTC may be set In this case the set DTC is not highly reliable Before replacing the ECU ensure that the communica tion circuit is normal When DTC U1417 is set in ASC ECU the DTC may also be set in ETACS ECU When the DTC is set in ETACS ECU carry out the diagnosis of the DTC for ETACS ECU first When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU receives the vehicle information stored in the ETACS ECU via CAN bus lines TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 235 DTC SET CONDITIONS ASC ECU communicates with ETACS ECU via CAN bus lines This DTC is set when the vehicle informa
268. o P 35C 316 Then go to Step 16 STEP 5 Check for wheel speed sensor as a single unit Q Is the check result normal YES Go to Step 6 NO Replace the wheel speed sensor RR Refer to P 35C 316 Then go to Step 16 STEP 6 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the Rear wheel hub assembly RL FWD gt Refer to GROUP 27A On vehicle Service P 27A 5 e Check the wheel bearing lt RL AWD gt for looseness Refer to GROUP 27B On vehicle Service P 27B 1 7 Q Is the check result normal YES Go to Step 7 NO FWD Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 NO AWD Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 79 DIAGNOSIS lt FWD gt Ball bearing Magnetic Rear ie 7 encoder Oil seal lt AWD gt Rear wheel bearing o 1 Magnetic encoder u Rear hub assembly AC704785AB Check harness ASC ECU AC606869DE MB991997 A 51 ASC ECU harness connector STEP 7 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Ste
269. o continuity Check harness Q Is the check result normal YES Go to Step 12 MB991997 ASC ECU NO Not normal at the terminal No 45 or No 46 Go to De Step 10 A 51 ASC ECU harness connector AC606869CZ TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 58 DIAGNOSIS STEP 10 Connector check A 51 ASC ECU connector A 07 wheel speed sensor lt FL gt connector Q Is the check result normal YES Go to Step 11 NO Repair the defective connector Then go to Step 16 STEP 11 Wiring harness check between A 51 ASC ECU connector terminal No 45 and A 07 wheel speed sensor lt FL gt connector terminal No 1 and between A 51 ASC ECU connector terminal No 46 and A 07 wheel speed sensor lt FL gt connector terminal No 2 e Check for short circuit in wheel speed sensor lt FL gt circuit Q Is the check result normal YES Go to Step 15 NO Repair the wiring harness Then go to Step 16 STEP 12 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the ASC ECU side connector and harness side connector and then measure the voltage at the special tool connector side 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 45 and body ground and between the ground terminal No 46 and body ground OK Te
270. o set carry out diagnosis with par ticular emphasis on wiring harness and connector failures between ASC ECU and the wheel speed sensor For diag nosis procedures refer to How to treat past trouble GROUP 00 How to Cope with Intermittent Malfunction P 00 13 e When DTC C1015 is not set the following conditions may be present e Some wheels slip Unstable vehicle attitude External noise interference Vehicle ran with the parking brake applied Rotate only two wheels with drum tester DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C101F set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the DTC Check that DTC C1015 is also set Q Is DTC C1015 also set YES Perform the diagnosis for DTC C1015 Refer to P 35C 36 NO Goto Step 4 STEP 4 Check for wheel speed sensor installation Check how the wheel speed sensor lt FR gt is installed Discon nection of wheel speed sensor loose mounting bol
271. ompletion go to Step 2 STEP 2 DTC check after resetting CAN bus lines Use scan tool to check that the DTC is set in the combination meter and ETACS ECU Q Is any DTC set YES Carry out the diagnosis for the DTC NO Goto Step 3 STEP 3 Brake fluid level check Check that the brake fluid is filled up to the MIN level or higher Q Is the check result normal YES Go to Step 5 NO Go to Step 4 STEP 4 Brake pad check Refer to GROUP 35A On vehicle Service Brake Pad Check P 35A 20 Q Is the check result normal YES Fill the brake fluid up to the MAX level Then go to Step 18 NO Replace the brake pad Refer to GROUP 35A On vehicle Service Brake Pad Replacement P 35A 24 lt FWD gt P 35A 21 lt AWD gt Then go to Step 18 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 244 DIAGNOSIS STEP 5 Brake fluid level switch check Refer to GROUP 35A On vehicle Service Brake Fluid Level Switch Check P 35A 19 Q Is the check result normal YES Go to Step 6 NO Replace the reservoir tank assembly Refer to GROUP 35A Master Cylinder Assembly Brake Booster Assembly P 35A 37 lt FWD gt P 35A 34 lt AWD gt Then go to Step 18 STEP 6 Connector check A 06 brake fluid level switch connector C 312 ETACS ECU connector Q Is the check result normal YES Go to Step 7 NO Repair the damaged connector STEP 7 Measure the voltage at A 06 brake fluid level switch connecto
272. on of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 136 DIAGNOSIS OPERATION e ASC ECU contains the power supply circuit terminal No 32 for the solenoid valve The solenoid valve is ener gized by the valve relay which is incorporated in ASC ECU The valve relay which is incorporated in ASC ECU is always energizing the solenoid valve unless the initial check is in progress when the ignition switch is turned on or the recurrent system check is in progress DTC SET CONDITIONS This DTC will be set when the solenoid valve supply voltage is not within the standard value PROBABLE CAUSES Current trouble Fusible link malfunction Damaged wiring harness and connectors Abnormality in battery or generator ASC ECU malfunction Past trouble Carry out diagnosis with particular emphasis on wiring har ness and connector failures between the power supply cir cuit terminal No 32 to ASC ECU solenoid valve or ground circuit terminal No 16 and 47 For diagnosis procedures refer to How to treat past trouble GROUP 00 How to Cope with Intermittent Malfunction P 00 13 DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III M
273. ool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after repairing the CAN bus line Q Is DTC C123B set YES Go to Step 3 NO The procedure is complete STEP 3 Check the wheel speed sensor and G and yaw rate sensor related DTC Check that DTC No C 100A C1015 C1020 C102B C1011 C101C C1027 C1032 C1014 C101F C102A C1035 C1041 C1042 C1043 C1044 C1219 C2205 C123C or C2204 is also set Q Is DTC C100A C1015 C1020 C102B C1011 C101C C1027 C1032 C1014 C101F C102A C1035 C1044 C1042 C1043 C1044 C1219 C2205 C123C or C2204 also set YES Carry out the diagnosis for the DTC that is set Refer to P 35C 27 Then go to Step 10 NO Goto Step 4 STEP 4 Check of G and yaw rate sensor installation status Check that the G and yaw rate sensor is installed correctly Refer to P 35C 320 Q Is the check result normal YES Go to Step 5 NO Improperly installed After installing the G and yaw rate sensor properly perform the calibration of the G and yaw rate sensor to make ASC ECU relearn the neutral point Refer to P 35C 304 Then go to Step 6 NO Different sensor is installed After replacing the G and yaw rate sensor perform the calibration of the G and yaw rate sensor
274. ool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C2003 set YES Go to Step 3 NO The procedure is complete STEP 3 Scan tool other system diagnostic trouble code Use scan tool to check whether any coding related diagnostic trouble code is set by ETACS ECU Q Is the DTC set YES Troubleshoot for the relevant diagnostic trouble code Refer to GROUP 54A ETACS ECU Check chart for diagnostic trouble codes P 54A 674 Then go to Step 8 NO Goto Step 4 STEP 4 Check part number of ASC ECU Check the part number of ASC ECU Q Is the check result normal YES Go to Step 5 NO Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 8 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 207 DIAGNOSIS STEP 5 ETACS ECU coding data check Refer to GROUP 00 Coding List P 00 28 Vehicle line OK LANCER H B Transmission OK lt 5MI T gt M T OK lt CVT gt CVT Engine type OK 2 4L D4 MPI VVT Engine power OK Normal Chassis type for A S C OK Type 4 Final drive OK Front Drive Transfer OK 2WD SAS OK Present 4WD AWD OK Not present TCM OK lt 5M T gt Not present OK lt CVT gt Present ACDAY
275. ooster Malfunction of master cylinder assembly DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T Ill Sub Assembly e MB991824 Vehicle Communication Interface V C l e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 DTC check Use scan tool to check the DTC for the ASC system Refer to P 35C 27 Q Is the check result normal YES Go to Step 2 NO Troubleshoot for the relevant DTC Refer to P 35C 27 STEP 2 Hydraulic unit Integrated with ASC ECU check Check that the brake tube is installed to the hydraulic unit inte grated with ASC ECU correctly Refer to P 35C 299 Q Is the check result normal YES Go to Step 3 NO Connect the brake tubes correctly repair the external brake lines or replace the hydraulic unit ASC ECU Refer to P 35C 311 STEP 3 Brake operation check Perform the following checks Brake pedal check Refer to GROUP 35A On vehicle Ser vice Brake Pedal Check and Adjustment P 35A 14 Brake booster check Refer to GROUP 35A On vehicle Service Brake Booster Check P 35A 16 Check valve check Refer to GROUP 35A On vehicle Ser vice Check Valve Check P 35A 18 Q Can any fault be found with the brake operation YES Check the brake related parts and repair if necessary Then go to Step 4 NO Goto Step 4 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 264 DIAGNOSIS STEP 4 Hydraulic unit check Perform
276. or A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS AS wh C ECU monitors the signals from each wheel speed sensor ile the vehicle is being driven If any fault below is found in these sensor signals ASC ECU will set the relevant DTC Missing wheel speed sensor signal Wheel speed sensor signal continuously indicates low value PROBABLE CAUSES Cu rrent trouble Excessive gap between the wheel speed se
277. or AC611137CN DIAGNOSIS STEP 5 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the connector connect special tool MB991997 to the harness side connector and measure the voltage at the special tool connector side NOTE Do not connect the special tool MB991997 to ASC ECU 2 Measure the voltage between the terminal No 2 and the body ground OK Approximately battery positive voltage Q Is the check result normal YES Go to Step 7 NO Goto Step 6 STEP 6 Connector check A 51 ASC ECU connector Q Is the check result normal YES The open or short circuit may be present in the power supply circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 02 and fuse No 17 NO Repair the defective connector TSB Revision 35C 216 ACTIVE STABILITY CONTROL SYSTEM ASC Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC611137CO DIAGNOSIS STEP 7 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Resistance between the terminal No 16 and the body ground and between the terminal No 47 and the body ground OK Continuity exists 2 ohms or less
278. or drive circuit Low or high power supply voltage in pump motor Prohibited Prohibited Enabled Enabled Prohibited Prohibited Prohibited Prohibited Prohibited Prohibited Prohibited Prohibited TSB Revision Prohibited Prohibited Prohibited Prohibited Prohibited Prohibited Prohibited Prohibited Item ACTIVE STABILITY CONTROL SYSTEM ASC EBD DIAGNOSIS ABS Skid control TCL 35C 21 HSA Abnormality in brake fluid pressure sensor circuit Enabled Prohibited Prohibited Prohibited Prohibited Abnormality in brake fluid pressure sensor output signal Enabled Prohibited Prohibited Prohibited Prohibited Abnormality in stop light switch circuit Enabled Enabled Prohibited Prohibited Prohibited Prolonged operation of ASC Enabled Enabled Prohibited Prohibited Prohibited Abnormality in ASC ECU Prohibited Prohibited 4 Prohibited Prohibited Prohibited Abnormality in battery voltage high voltage 18 0 1 0 V or more Prohibited Prohibited Prohibited Prohibited Prohibited Brake fluid filling not completed Enabled Enabled Enabled Enabled Prohibited Torque request signal rejection Enabled Enabled Prohibited Prohibited Prohibited CAN time out error VIN not recorded Enable
279. out diagnosis with par ticular emphasis on wiring harness and connector failures between ASC ECU and the wheel speed sensor For diag nosis procedures refer to How to treat past trouble GROUP 00 How to Cope with Intermittent Malfunction P 00 13 e When DTC C1020 is not set the following conditions may be present e Some wheels slip Unstable vehicle attitude External noise interference Vehicle ran with the parking brake applied Rotate only two wheels with drum tester DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C102A set YES Go to Step 3 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 91 DIAGNOSIS STEP 3 Using scan tool MB991958 check the DTC Check that the DTC C1020 is also set Q Is DTC C1020 also set YES Perform the diagnosis for the DTC C1020 Refer to P 35C 41 NO Goto Step 4 STEP 4 Check for wheel speed sensor installation Check how the wheel speed s
280. p 8 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction NO lt Deformation FWD gt Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 NO lt Deformation AWD gt Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 STEP 8 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 43 and the body ground and between the wheel speed sensor ground terminal No 42 and the body ground OK 1 volt or less Q Is the check result normal YES Go to Step 9 NO Not normal at terminal No 43 or No 42 Go to Step 10 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 80 DIAGNOSIS STEP 9 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resi
281. pecial function 18 Select SAS calibration under Sensor calibration and press OK button 19 The screen displays SAS calibration The selected command will be executed Are you sure Caution Confirm the execution conditions Then press OK button 20 Executed The command was executed will be shown Then press OK button 21 Select Diagnostic trouble code under ABS ASC ASTC WSS If the diagnostic trouble code C2205 SAS internal failure past trouble is set clear it 22 Learning neutral point complete 23 Turn the ignition switch to LOCK OFF position and then disconnect the scan tool lt When the steering wheel sensor is replaced gt 1 Carry out steps 1 to 21 of the steering wheel sensor calibration for when the ASC ECU is replaced 2 Select the relevant system from the menu 3 Select ACD AYC from the system list in System select and press OK button 4 Select Special function under ACD AYC 5 Select Sensor calibration under Special function NOTE If the steering angle sensor neutral point has been learned the display will show If SAS needs re calibration execute SAS calibration after executing SAS initialization If yes press OK button 6 As SAS Calibration is selected under Sensor calibration press OK button NOTE At this time if the steering angle sensor neutral point has been learned the display will show Do you want to start Note This operation will dear DTCs
282. pen and short circuit Q Is the check result normal YES Replace the G and yaw rate sensor Refer to P 35C 320 Then go to Step 9 NO Repair the wiring harness and then go to Step 10 STEP 9 Check whether the DTC is reset Q Is DTC C1242 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 10 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 TSB Revision 35C 182 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS STEP 10 Check whether the DTC is reset Q Is DTC C1242 set YES Return to Step 1 NO The procedure is complete DTC C123C Abnormality in G and yaw rate sensor Abnormality in lateral G sensor and yaw rate output value incorrect installation G and Yaw Rate Sensor Circuit gt _ 2 z z WHITE NO i BRO BLACK 1 GRAY 2 amp 4 gt _ lt lt gt c1 BLUE lt IP ur uunc E lt gt _Q co ORANGE lt I gt lt gt _ gt G AND YAW RATE SENSOR 137 EES NOTE 1 NON a 2 TURB ASC ECU A 51 Vay AYEY EYTY OY OVI ATVI YT BOAO OTE INOS 409 9 R M LH VATER EAE 7 Connector A 51 ic On SEDE AC802869AC WAH35M004A AC802706BG TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 183 DIAGNOSIS
283. pen or short circuit in wheel speed sensor FL circuit Q Is the check result normal YES Go to Step 11 NO Repair the wiring harness Then go to Step 15 STEP 11 Check for wheel speed sensor installation Check how the wheel speed sensor FL is installed Discon nection of wheel speed sensor loose mounting bolt etc Q Is the check result normal YES Go to Step 12 NO Reinstall the wheel speed sensor FL correctly Refer to P 35C 316 Then go to Step 15 TSB Revision 35C 11 Wheel bearing Oil seal 2 ACTIVE STABILITY CONTROL SYSTEM ASC Magnetic encoder AC504925AC DIAGNOSIS STEP 12 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the wheel bearing FL for looseness Refer to GROUP 26 On vehicle Service P 26 10 Q Is the check result normal YES Go to Step 13 NO Replace the wheel bearing Refer to GROUP 26 Front axle hub assembly P 26 16 Then go to Step 15 STEP 13 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 14 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substa
284. press OK button 11 Learning neutral point complete 12 Turn the ignition switch to LOCK OFF position and then disconnect the scan tool ASC OFF SWITCH REMOVAL AND INSTALLATION NOTE Refer to GROUP 52A Instrument Panel Assembly for the clip location P 52A 3 M1355020100143 AC704090AB Removal steps Removal steps Continued 1 Bottom cover assembly driver 3 Lower panel assembly side 4 ASC OFF switch connector 2 Side air outlet 5 ASC OFF switch TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC ASC OFF SWITCH INSPECTION M1355020200195 ASC OFF SWITCH CONTINUITY CHECK 1 As shown in the figure connect the circuit tester to the ASC OFF switch as a single unit 2 Check the continuity when the ASC OFF switch is pressed and released 35C 310 Item When the ASC When the ASC OFF switch is OFF switch is released No pressed operation status Continuity No continuity Continuity between exists 2 Qor terminal No 1 less and No 2 Continuity Continuity Continuity between exists exists terminal No 3 and No 4 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC HYDRAULIC UNIT 35C 31 1 HYDRAULIC UNIT REMOVAL AND INSTALLATION N CAUTION When the hydraulic unit integrated with ASC ECU is replaced after turning the ignition switch ON or OFF vehicle information from ETACS ECU is registered
285. r Mutual monitoring of RR wheel speed sensor Abnormality in periodical signal for FL wheel speed sensor Abnormality in periodical signal for FR wheel speed sensor Abnormality in periodical signal for RL wheel speed sensor Abnormality in periodical signal for RR wheel speed sensor FL wheel speed sensor control phase time exceeded FR wheel speed sensor control phase time exceeded RL wheel speed sensor control phase time exceeded RR wheel speed sensor control phase time exceeded TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS Brake warning light brake warning display ABS warning light ABS warning display ASC warning display and light 35C 15 ASC OFF display Abnormality in FL wheel inlet valve system Abnormality in FR wheel inlet valve system Abnormality in RL wheel inlet valve system Abnormality in RR wheel inlet valve system ON ON ON Abnormality in FL wheel outlet valve system Abnormality in FR wheel outlet valve system Abnormality in RL wheel outlet valve system Abnormality in RR wheel outlet valve system Abnormality in FL RR wheel cut valve system Abnormality in FR RL wheel cut valve system Abnormality in FL RR wheel suction valve system Abnormality in FR RL wheel suction valve system Faulty valve power supply circuit ON Faulty mo
286. r 1 Disconnect the connector and measure at the wiring harness side 2 Turn the ignition switch to the ON position 3 Measure the voltage between the terminal No 1 and the body ground OK Battery positive voltage Q Is the check result normal YES Go to Step 10 NO Goto Step 8 STEP 8 Measure the voltage at the C 312 ETACS ECU connector A CAUTION With the C 312 ETACS ECU connector kept connected dis connect the A 06 brake fluid level switch connector 1 Turn the ignition switch to the ON position 2 Measure the voltage between terminal No 1 and the body ground by backprobing OK Battery positive voltage Q Is the check result normal YES Go to Step 9 NO Replace the ETACS ECU Refer to GROUP 54A ETACS P 54A 769 Then go to Step 18 STEP 9 Wiring harness check between A 06 brake fluid level switch connector and C 312 ETACS ECU connector Check for open circuit in the harness wire between A 06 brake fluid level switch connector terminal No 1 and C 312 ETACS ECU connector terminal No 1 Q Is the check result normal YES Go to Step 16 NO Repair the wiring harness Then go to Step 18 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 245 DIAGNOSIS STEP 10 Wiring harness check between A 06 brake fluid level switch connector and body ground Check for open circuit in the harness wire between A 06 brake fluid level switch connector terminal No 2 and bod
287. r Faulty routing of Check and does not lock hydraulic unit brake clean the brake force t ube line Clogged brake line other than hydraulic unit Clogged hydraulic Replace the circuit in the hydraulic hydraulic unit unit assembly 7 After the inspection turn the ignition switch to the LOCK OFF position and then disconnect scan tool TSB Revision 35C 302 ACTIVE STABILITY CONTROL SYSTEM ASC ON VEHICLE SERVICE IN THE EVENT OF A DISCHARGED BATTERY M1355006200168 A WARNING If the ASC is not operating the vehicle will be unsta ble during braking Do not drive the vehicle with the ASC ECU connector disconnected or with the ASC not operating If the engine is started using a booster cable when the battery is completely flat and the vehicle is then driven without waiting for the battery to be recharged the engine may misfire and it may not be possible to drive the vehicle This is because the ASC consumes a large amount of current when carrying out its initial checks If this happens recharge the battery fully ALL SENSOR CALIBRATION G AND YAW RATE SENSOR STEERING WHEEL SENSOR BRAKE FLUID PRESSURE SENSOR A CAUTION Before carrying out the calibration check that the diagnostic trouble code related to the steer ing wheel sensor G and yaw rate sensor or brake fluid pressure sensor is not set N CAUTION When the next operation has been completed
288. r Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 8 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction NO lt Deformation FWD gt Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 NO lt Deformation AWD gt Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 STEP 8 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C102A set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 9 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 9 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C102A set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 93 DIAGNOSIS DTC C1035 Mutual monitoring of RR wheel speed sens
289. r Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU sends the illumination request signal of the ABS warning light to the combination meter through ETACS ECU via CAN communication e ASC ECU illuminates the ABS warning light via ETACS ECU for approximately 3 seconds for valve check with the ignition switch turned to the ON position TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 247 DIAGNOSIS COMMENTS ON TROUBLE SYMPTOM This may be caused by faults in the CAN bus line ETACS ECU combination meter or ASC ECU PROBABLE CAUSES Damaged wiring harness and connectors Malfunction of ETACS ECU Combination meter malfunction ASC ECU malfunction Malfunction of coding data for ETACS ECU DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C Troubleshooting P 54C 16 STEP 2 Using scan tool MB991958 diagnostic trouble code Use scan tool to check the diagnostic trouble code for the ASC system Q Is the DTC set YES Carry out the diagnosis for the diagnostic trouble code Refer to P 35C 27 NO Goto Step 3 STEP 3
290. r lt RL gt correctly Refer to P 35C 316 Then go to Step 16 STEP 5 Check for wheel speed sensor as a single unit Q Is the check result normal YES Go to Step 6 NO Replace the wheel speed sensor lt RL gt Refer to P 35C 316 Then go to Step 16 STEP 6 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the Rear wheel hub assembly RL FWD gt Refer to GROUP 27A On vehicle Service P 27A 5 e Check the wheel bearing lt RL AWD gt for looseness Refer to GROUP 27B On vehicle Service P 27B 1 7 Q Is the check result normal YES Go to Step 7 NO FWD Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 NO AWD Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 71 DIAGNOSIS lt FWD gt Ball bearing Magnetic Rear ie 7 encoder Oil seal lt AWD gt Rear wheel bearing o 1 Magnetic encoder u Rear hub assembly AC704785AB Check harness ASC ECU AC606869DC MB991997 A 51 ASC ECU harness connector STEP 7 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor
291. r ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS ASC ECU monitors the voltage fluctuation in each wheel speed sensor circuit If ASC ECU detects the open or short circuit in the circuit it will set a DTC PROBABLE CAUSES Current trouble Damaged wiring harness and connectors Noise interference Malfunction of wheel speed sensor Malfunction of ASC ECU TSB Revision 35C 32 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS Past trouble Carry out diagnosis with particular emphasis on wiring har ness and connector failures between ASC ECU and the wheel speed sensor For diagnosis procedures refer to Ho
292. r to P 35C 311 Then go to Step 7 NO The procedure is complete STEP 7 DTC recheck Q Is DTC U1003 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 229 DIAGNOSIS DTC U1415 Variant coding not implemented A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the DTC U1415 is set in ASC ECU the DTC may also be set in ETACS ECU When the DTC is set in ETACS ECU carry out the diagnosis of the DTC for ETACS ECU first When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU receives the vehicle information stored in the ETACS ECU via CAN bus lines DTC SET CONDITIONS This DTC is set when the variant coding for ETACS ECU has not been implemented PROBABLE CAUSES Variant coding for ETACS ECU has not been implemented ASC ECU malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cabl
293. ration voltage High voltage G and Yaw Rate Sensor Circuit D Q 2 z S G AND YAW RATE SENSOR C 137 GS ORANGE WHITE ND a NO BLACK GRAY 2 amp A da r3 c1 BLUE D EN 4D d co ASC ECU V 3 NOTE 1 NON TURBO 2 TURBO 19 A oE 6 WAH35M004A AC802706BG A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal Do not drop or shock the G and yaw rate sensor When the G and yaw rate sensor is replaced always carry out calibration to make ASC ECU learn the neu tral point Refer to P 35C 302 When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 192 DIAGNOSIS OPERATION e ASC ECU supplies power to the G and yaw rate sensor at the terminal No 1 The G and yaw rate sensor outputs the signal to ASC ECU via the special CAN bus lines DTC SET CONDITIONS This DTC is set if any malfunction below is found DTC C2
294. reign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction When the encoder is deformed replace the rear hub assembly NO lt Deformation FWD gt Replace the rear wheel hub assembly Refer to GROUP 27A Rear axle hub assembly P 27A 7 NO lt Deformation AWD gt Replace the wheel bearing Refer to GROUP 27B Rear axle hub assembly P 27B 19 STEP 5 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1044 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 6 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 6 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1044 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 107 DTC C1046 FL wheel speed sensor control phase time exceeded Wheel Speed Sensor Circuit PINK WHITE
295. rmal YES Go to Step 15 NO Repair the wiring harness Then go to Step 16 STEP 12 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the ASC ECU side connector and harness side connector and then measure the voltage at the special tool connector side 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 34 and body ground and between the ground terminal No 33 and body ground OK Terminal No 34 and body ground Battery posi tive voltage Terminal No 33 and body ground 1 volt or less Check harness Q Is the check result normal MB991997 ASC ECU YES Go to Step 13 NO Goto Step 15 A 51 ASC ECU harness connector AC606870BM STEP 13 Connector check A 51 ASC ECU connector A 02 wheel speed sensor lt FR gt connector Q Is the check result normal YES Go to Step 14 NO Repair the defective connector Then go to Step 16 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 66 DIAGNOSIS STEP 14 Wiring harness check between A 51 ASC ECU connector terminal No 34 and A 02 wheel speed sensor lt FR gt connector terminal No 1 and between A 51 ASC ECU connector terminal No 33 and A 02 wheel speed sensor lt FR gt connector terminal No 2 e Check for open circuit in wheel sp
296. rminal signal terminal No 36 and the body ground and between the wheel speed sensor ground terminal No 37 and the body ground OK 1 volt or less Q Is the check result normal YES Go to Step 7 NO Not normal at the terminal No 36 or No 37 Go to Step 9 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 123 DIAGNOSIS STEP 7 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the resistance between the wheel speed sensor power supply terminal No 36 and the body ground and between the wheel speed sensor ground terminal No 37 and the body ground OK No continuity Check harness Q Is the check result normal YES Go to Step 8 MB991997 ASC ECU NO s didus at the terminal No 36 or No 37 Go to ep 9 A 51 ASC ECU harness connector AC606869DD STEP 8 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the ASC ECU side connector and harness side connector and then measure the voltage at the special tool connector side 2 Turn the ignition switch to the ON position 3 Measure the vol
297. rminal No 45 and body ground Battery posi tive voltage Terminal No 46 and body ground 1 volt or less Check harness Q Is the check result normal MB991997 ASC ECU YES Go to Step 13 NO Goto Step 15 A 51 ASC ECU harness connector AC606870BL STEP 13 Connector check A 51 ASC ECU connector A 07 wheel speed sensor lt FL gt connector Q Is the check result normal YES Go to Step 14 NO Repair the defective connector Then go to Step 16 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 59 STEP 14 Wiring harness check between A 51 ASC ECU connector terminal No 45 and A 07 wheel speed sensor lt FL gt connector terminal No 1 and between A 51 ASC ECU connector terminal No 46 and A 07 wheel speed sensor lt FL gt connector terminal No 2 e Check for open circuit in wheel speed sensor lt FL gt circuit Q Is the check result normal YES Go to Step 15 NO Repair the wiring harness Then go to Step 16 STEP 15 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1011 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 16 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 ST
298. rmittent Malfunction P 00 13 STEP 6 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1041 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 99 DIAGNOSIS DTC C1042 Abnormality in periodical signal for FR wheel speed sensor A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION Each wheel speed detecting section is a kind of a pulse generator It consists of the encoder plate on which the north and south pole of magnet are arranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting s
299. rness or connector failure for the special CAN bus lines between ASC ECU and the G and yaw rate sensor Improper installation of the G and yaw rate sensor Damaged wiring harness and connectors G and yaw rate sensor malfunction ASC ECU malfunction DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C 1 e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 188 DIAGNOSIS STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 2 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 Using scan tool MB991958 check the DTC Check that the DTC U0125 is set in ASC ECU Q Is DTC U0125 set YES Troubleshoot for the DTC Refer to P 35C 221 Then go to Step 3 NO Goto Step 3 STEP 3 DTC recheck after resetting CAN bus lines Q Is DTC C2204 set YES Go to Step 4 NO The procedure is complete STEP 4 Using scan tool MB991958 check the data list Check the following service data under curb weight condition or one occupant driver only in the vehicle on a flat road Refer to P 35C 291 Item 08 Lateral G sensor Item 09 G sensor Item 12 Yaw rate sensor e Item 73 Lateral G sensor offse
300. rranged alternately for detecting the wheel speed which rotates at the same speed of the wheels and the wheel speed sensor This detecting section outputs the frequency pulse signals in proportion to the wheel speed The pulse signals generated by the wheel speed detecting section are sent to ASC ECU ASC ECU uses the fre quency of the pulse signals to determine the wheel speed DTC SET CONDITIONS This DTC is set if any malfunction below is found When the brake fluid pressure is decreased for a long time When the brake fluid pressure is held for a long time NOTE ASC controls the vehicle based on the wheel speed sig nal When the brake fluid pressure is decreased or held for an abnormally long time the wheel speed sensor signal may have a problem PROBABLE CAUSES Damaged wiring harness and connectors External noise interference Malfunction of wheel speed sensor ASC ECU malfunction Excessive gap between the wheel speed sensor and the magnetic encoder for wheel speed detection Adhesion of foreign materials on the wheel speed sensor Adhesion of foreign materials on the magnetic encoder for wheel speed detection Wheel bearing malfunction Improper installation of the wheel speed sensor Deformation of the magnetic encoder for wheel speed detection Disturbance of magnetization pattern for magnetic encoder for wheel speed detection Missing teeth of the magnetic encoder for wheel speed detection TSB Revision
301. rrent trouble Damaged wiring harness and connectors Noise interference Malfunction of wheel speed sensor Malfunction of ASC ECU TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 49 DIAGNOSIS Past trouble Carry out diagnosis with particular emphasis on wiring har ness and connector failures between ASC ECU and the wheel speed sensor For diagnosis procedures refer to How to treat past trouble GROUP 00 How to Cope with Intermittent Malfunction P 00 13 DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C102B set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 Item No 04 RR wheel speed sensor Q Is the check result normal YES Go to Step 10 NO Goto Step 4 STEP 4 Connector check A 51 ASC ECU connector C 39 intermediate connector D 11 intermediate connec
302. rvice P 33 8 Q Is the check result normal YES After checking the wheel alignment carry out calibration of steering wheel sensor to make ASC ECU relearn the neutral point Refer to P 35C 304 Then go to Step 11 NO After adjusting the wheel alignment carry out calibration of steering wheel sensor to make ASC ECU relearn the neutral point Refer to P 35C 304 Then go to Step 11 STEP 11 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 tem 11 Steering angle Q Is the check result normal YES Go to Step 12 NO Replace the steering wheel sensor Refer to P 35C 321 and then go to Step 12 STEP 12 Check whether the DTC is reset Q Is DTC C123C set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 13 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 186 DIAGNOSIS STEP 13 Check whether the DTC is reset Q Is DTC C123C set YES Return to Step 1 NO The procedure is complete DTC C2204 Internal abnormality in G and yaw rate sensor G and Yaw Rate Sensor Circuit G AND YAW RATE SENSOR 1 5 2 3 NOTE 1 NON TURBO 2 TURBO 22 29 18 19 I gt _ 2 z S WHITE BLACK 1 GRAY ORANGE lt gt BLUE ASC ECU A 51 Vay AVYEY FYTY OY OVA TV YT
303. s ASC ECU AC606870BL DIAGNOSIS STEP 7 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the ASC ECU side connector and harness side connector and then measure the voltage at the special tool connector side 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 45 and body ground and between the ground terminal No 46 and body ground OK Terminal No 45 and body ground Battery posi tive voltage Terminal No 46 and body ground 1 volt or less Q Is the check result normal YES Go to Step 8 NO Goto Step 10 STEP 8 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 9 NO Replace the wheel speed sensor FL Refer to P 35C 316 Then go to Step 11 STEP 9 Wiring harness check between A 51 ASC ECU connector terminal No 45 and A 07 wheel speed sensor FL connector terminal No 1 and between A 51 ASC ECU connector terminal No 46 and A 07 wheel speed sensor FL connector terminal No 2 Check for open or short circuit in wheel speed sensor FL circuit Q Is the check result normal YES Go to Step 10 NO Repair the wiring harness Then go to Step 11 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 35 STEP 10
304. s the check result normal YES Go to Step 11 NO Goto Step 9 TSB Revision 35C 194 ACTIVE STABILITY CONTROL SYSTEM ASC Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606870BQ DIAGNOSIS STEP 9 Voltage measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect the ASC check harness Special tool MB991997 to the ASC ECU side connector and harness side connector and then measure at the special tool connector side 2 Disconnect the C 137 G and yaw rate sensor connector 3 Turn the ignition switch to the ON position 4 Measure the voltage between the terminal No 22 and the body ground OK 6 5 18 volt Q Is the check result normal YES Go to Step 10 NO Go to Step 12 STEP 10 Wiring harness check between A 51 ASC ECU connector terminal No 22 and C 137 G and yaw rate sensor connector terminal No 1 Check the power supply circuit for open and short circuit Q Is the check result normal YES Go to Step 12 NO Repair the wiring harness between A 51 ASC ECU connector terminal No 22 and C 137 G and yaw rate sensor connector terminal No 1 STEP 11 Wiring harness check between A 51 ASC ECU connector terminal No 29 and C 137 G and yaw rate sensor connector terminal No 5 Check the ground circuit for open circuit Q Is the check result normal YES Replace the G and yaw rate sensor Refer to P 3
305. scan tool without depressing the brake pedal When carrying out the actuator tests rotate the wheel by hands to confirm that the braking force changes TSB Revision 35C 300 poem 02 03 04 Depressed Pedal operation Increase in pressure Solenoid valve position lt Steady pressure Reduction in pressure ACTIVE STABILITY CONTROL SYSTEM ASC ON VEHICLE SERVICE NOTE e While performing the actuator test the ABS warning light flashes at a rate of 2 Hz e When ASC ECU is disabled due to the fail safe function the scan tool actuator test cannot be performed e After the actuator test has been performed the ABS warning light brake waning light and ASC OFF light or ASC OFF display illuminate until the ignition switch is turned to ON again or the communication between scan tool and ASC ECU is terminated Scan tool actuator test Ae Scan tool actuator test No 05 06 07 08 Scan tool actuator test E 02 03 04 start Approx 2 seconds Scan tool actuator test ra No 05 06 07 08 start Increase in pressure Cut valve suction valve position Steady pressure Reduction in pressure Lock Checking the brake force When the pedal is free Those with a braking effort Checking the brake force Those without a braking effort Approx 2 seconds Scan tool actuator test p No 01 02 03 04 Approx 3 seconds Scan tool actuator test Fido 06 07
306. set Q Is DTC U0401 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 5 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 225 DIAGNOSIS STEP 5 Check whether the DTC is reset Q Is DTC U0401 set YES Return to Step 1 NO The procedure is complete DTC U0428 Communication error in steering wheel sensor A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 If DTC U0428 is set in ASC ECU always diagnose the CAN bus line If there is any fault in the CAN bus lines an incorrect DTC may be set In this case the set DTC is not highly reliable Before replacing the ECU ensure that the communica tion circuit is normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION The steering wheel sensor outputs the steering wheel status to ASC ECU via the CAN bus lines DTC SET CONDITIONS This DTC is set when ASC ECU has detected the communica tion error in the steering wheel sensor PROBABLE CAUSES Steering wh
307. signals to determine the wheel speed DTC SET CONDITIONS This DTC is set if any malfunction below is found When the brake fluid pressure is decreased for a long time When the brake fluid pressure is held for a long time NOTE ASC controls the vehicle based on the wheel speed sig nal When the brake fluid pressure is decreased or held for an abnormally long time the wheel speed sensor signal may have a problem PROBABLE CAUSES Damaged wiring harness and connectors External noise interference Malfunction of wheel speed sensor ASC ECU malfunction Excessive gap between the wheel speed sensor and the magnetic encoder for wheel speed detection Adhesion of foreign materials on the wheel speed sensor Adhesion of foreign materials on the magnetic encoder for wheel speed detection Wheel bearing malfunction Improper installation of the wheel speed sensor Deformation of the magnetic encoder for wheel speed detection Disturbance of magnetization pattern for magnetic encoder for wheel speed detection Missing teeth of the magnetic encoder for wheel speed detection TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 115 DIAGNOSIS DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose t
308. sition 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 34 and the body ground or between the wheel speed sensor ground terminal No 33 and the body ground OK 1 volt or less Check harness Q Is the check result normal YES Go to Step 7 MB991997 ASC ECU NO ee at the terminal No 34 or No 33 Go to A 51 ASC ECU harness connector AC606869DA STEP 7 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool to ASC ECU 2 Measure the resistance between the wheel speed sensor power supply terminal signal terminal No 34 and the body ground and between the wheel speed sensor ground terminal No 33 and the body ground OK No continuity Q Is the check result normal Check harness YES Go to Step 8 NO Not normal at the terminal No 34 or No 33 Go to MB991997 ASC ECU Step 9 A 51 ASC ECU harness connector AC606869DB TSB Revision MB991997 A 51 ASC ECU harness connector ACTIVE STABILITY CONTROL SYSTEM ASC 35C 117 Check harness ASC ECU AC606870BM DIAGNOSIS STEP 8 Voltage measurement at the A 51 ASC ECU
309. sor gt gt C lt lt 9 Rear wheel speed sensor gt gt B lt lt 5 Harness clip grommet gt gt A lt lt 10 Rear wheel speed sensor 11 Protector NOTE The vehicle speed detection encoder is inte grated with the front wheel bearing and the rear wheel hub assembly which cannot be disassembled TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 315 WHEEL SPEED SENSOR Rear wheel N speed sensor Rear wheel hub assembly CI AC807126AD LO 4 Wheel speed sensor Section A A Harness clip Marking Wheel speed sensor harness AC608814AB INSTALLATION SERVICE POINTS gt gt A lt lt REAR WHEEL SPEED SENSOR O RING AND BOLT CONNECTION OF REAR WHEEL SPEED SENSOR WITH REAR WHEEL HUB ASSEMBLY INSTALLATION 1 Align the mounting bolt hole position of rear wheel speed sensor with the mounting bolt hole position of rear wheel hub assembly A CAUTION Do not insert the rear wheel speed sensor at an angle or by prying the sensor because it may be possible that the O ring of rear wheel speed sensor cannot be mounted properly After the insertion do not perform an alignment of mounting bolt hole positions by rotating the rear wheel speed sensor 2 As shown in the figure mount the rear wheel speed sensor while keeping the sensor perpendicular to the rear wheel hub assembly gt gt B lt lt HARNESS CLIP INSTALLATION Install the
310. ssure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU sends the signal to the engine control module ECM as necessary to decrease the engine output for the ASC sys tem operation DTC SET CONDITIONS This DTC is set when the request for the decrease of output is rejected by the engine control module ECM PROBABLE CAUSES Wrong coding of engine control module ECM engine control module ECM malfunction ASC ECU malfunction External noise interference DIAGNOSTIC PROCEDURE STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C121C set YES Go to Step 3 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 165 STEP 3 Using scan tool MB991958 check the other system DTC Use scan tool to check that the DTC is set in the engine control module ECM Q Is the DTC set YES Troubleshoot the engine control module ECM Refer to GROUP 13A Troubleshooting Diagnosis function P 13A 10 lt AWD gt or GROUP 13B Troubleshooting Diagnosis function P 13B 12 FWD and then go to Step 7 NO Goto Step 4 STEP 4 Using scan tool MB991958 ch
311. stance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the resistance between the wheel speed sensor power supply terminal signal terminal No 43 and the body ground and between the wheel speed sensor ground terminal No 42 and the body ground OK No continuity Check harness Q Is the check result normal YES Go to Step 12 NO Not normal at the terminal No 43 or No 42 Go to MB991997 ASC ECU Step 10 A 51 ASC ECU harness connector AC606869DF STEP 10 Connector check A 51 ASC ECU connector C 39 intermediate connector D 11 intermediate connector F 02 wheel speed sensor lt RR gt connector Q Is the check result normal YES Go to Step 11 NO Repair the defective connector Then go to Step 16 STEP 11 Wiring harness check between A 51 ASC ECU connector terminal No 43 and F 02 wheel speed sensor lt RR gt connector terminal No 1 and between A 51 ASC ECU connector terminal No 42 and F 02 wheel speed sensor lt RR gt connector terminal No 2 e Check for short circuit in wheel speed sensor RR circuit Q Is the check result normal YES Go to Step 15 NO Repair the wiring harness Then go to Step 16 TSB Revision MB991997 A 51 ASC ECU harness connector ACTIVE STABILITY CONTROL SYSTEM ASC 35C 81 Check harness ASC ECU AC
312. stem Q Does ASC turn ON and OFF normally using ASC OFF switch YES Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 NO Replace the ETACS ECU Refer to GROUP 54A ETACS ECU P 54A 769 Then go to Step 7 STEP 7 Retest the system Q Does ASC turn ON and OFF normally using ASC OFF switch YES The procedure is complete NO Return to Step 1 Inspection Procedure 10 Abnormality in brake operation A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Trouble code diagnosis P 54C 9 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 263 COMMENTS ON TROUBLE SYMPTOM Although the cause of the trouble cannot be clearly resolved since it depends on the running status and road surface condi tion the malfunction of the hydraulic circuit may occur if any DTC is not detected PROBABLE CAUSES Hydraulic unit Integrated with ASC ECU malfunction Malfunction of hydraulic circuit Malfunction of brake assembly Malfunction of brake b
313. stoplight switch connector and measure the voltage at harness connector side 2 Measure the voltage between the terminal No 2 and the body ground OK Battery positive voltage Q Is the check result normal YES Go to Step 16 NO An open circuit may be present in the wiring harness between C 304 ETACS ECU connector terminal No 1 and C 32 stoplight switch connector terminal No 2 Repair the wiring harness Then go to Step 22 STEP 16 Connector check C 38 joint connector Q Is the check result normal YES Go to Step 17 NO Repair the damaged connector Then go to Step 22 STEP 17 Voltage measurement at C 38 joint connector A CAUTION Measure while the brake pedal is depressed 1 Disconnect the connector and measure at the wiring harness side 2 Measure the voltage between the terminal No 2 and the body ground OK Battery positive voltage Q Is the check result normal YES Go to Step 18 NO An open circuit may be present in the wiring harness between C 38 joint connector terminal No 10 and C 32 stoplight switch connector terminal No 1 Repair the wiring harness STEP 18 Connector check C 312 ETACS ECU connector Q Is the check result normal YES Go to Step 19 NO Repair the damaged connector TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 157 DIAGNOSIS STEP 19 Measure the voltage at the C 312 ETACS ECU connector 1 Measure by backprobing without disconn
314. system from the menu Select Steering angle sensor from the system list in System select and press OK button Select Special function under Steering angle sensor Select SAS Calibration under Special function NOTE If the steering angle sensor neutral point has been learned the display will show If SAS needs re calibration execute SAS calibration after executing SAS initialization If yes press OK button As SAS initialization is selected under SAS Calibration press OK button NOTE At this time if the steering angle sensor neutral point has been learned the display will show Do you want to start Note This operation will dear DTCs Then press OK button The display should show Completed Press OK button 10 Press the OK button TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 2 ON VEHICLE SERVICE 35C 307 11 The display should show SAS Calibration Do you want to start Then press the OK button NOTE Please execute after making a tire and a steering wheel straight 12 The display should show Completed Press OK button 13 Turn the ignition switch to LOCK off position and then turn the ignition switch ON again 14 Select the relevant system from the menu 15 Select ABS ASC ASTC WSS from the system list under System select and press OK button 16 Select Special function under ABS ASC ASTC WSS 17 Select Sensor calibration under S
315. t Item 97 Yaw rate sensor offset Q Is the check result normal YES Turn the ignition switch to the ON from OFF position Then go to Step 8 NO Goto Step 5 STEP 5 G and yaw rate sensor installation check Check that the G and yaw rate sensor is installed correctly Q Is the check result normal YES Go to Step 6 NO Reinstall the G and yaw rate sensor correctly Refer to P 35C 320 and then go to Step 9 STEP 6 Connector check A 51 ASC ECU connector C 137 G and yaw rate sensor connector Q Is the check result normal YES Go to Step 7 NO Repair the connector and then go to Step 9 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 189 STEP 7 Wiring harness check between A 51 ASC ECU connector terminal No 18 and C 137 G and yaw rate sensor connector terminal No 2 as well as between A 51 ASC ECU connector terminal No 19 and C 137 G and yaw rate sensor connector terminal No 3 e Check the communication circuit for open and short circuit Q Is the check result normal YES Replace the G and yaw rate sensor Refer to P 35C 320 and then go to Step 8 NO Repair the wiring harness and then go to Step 9 STEP 8 Check whether the DTC is reset Q Is DTC C2204 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 and then go to Step 9 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 9 Check wheth
316. t YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the DTC Check that the DTC C1020 C1027 C102A or C1043 is also set Q Is the DTC C1020 C1027 C102A or C1043 also set YES Carry out the diagnosis for the relevant DTC and then go to Step 5 NO Go to Step 4 STEP 4 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 Item No 03 RL wheel speed sensor Q Is the check result normal YES Go to Step 14 NO Goto Step 5 TSB Revision 35C 122 ACTIVE STABILITY CONTROL SYSTEM ASC Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869DC DIAGNOSIS STEP 5 Connector check A 51 ASC ECU connector C 39 intermediate connector D 15 intermediate connector F 21 wheel speed sensor lt RL gt connector Q Is the check result normal YES Go to Step 6 NO Repair the defective connector Then go to Step 15 STEP 6 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply te
317. t etc Q Is the check result normal YES Go to Step 5 NO Reinstall the wheel speed sensor FR correctly Refer to P 35C 316 Then go to Step 9 TSB Revision 35C 88 ACTIVE STABILITY CONTROL SYSTEM ASC Oil seal Wheel bearing uj y ZEN COR Magnetic encoder AC504925AC DIAGNOSIS STEP 5 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 6 NO Replace the wheel speed sensor FR Refer to P 35C 316 Then go to Step 9 STEP 6 Check for wheel bearing looseness NOTE Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet encoder e Check the wheel bearing FR for looseness Refer to GROUP 26 On vehicle Service P 26 10 Q Is the check result normal YES Go to Step 7 NO Replace the wheel bearing Refer to GROUP 26 Front axle hub assembly P 26 16 STEP 7 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 8 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction NO Deformation Replace the wheel bearing Refer to GROUP 26 Front axle hub assembly P 26 16 STEP
318. tage between the wheel speed sensor power supply terminal signal terminal No 36 and body ground and between the ground terminal No 37 and body ground OK Terminal No 36 and body ground Battery posi tive voltage Terminal No 37 and body ground 1 volt or less Check harness Q Is the check result normal MB991997 ASC ECU YES Go to Step 9 NO Go to Step 14 A 51 ASC ECU harness connector AC606870BN TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 124 DIAGNOSIS STEP 9 Check for wheel speed sensor as a single unit Refer to P 35C 318 Q Is the check result normal YES Go to Step 10 NO Replace the wheel speed sensor lt RL gt Refer to P 35C 316 Then go to Step 15 STEP 10 Wiring harness check between A 51 ASC ECU connector terminal No 36 and F 21 wheel speed sensor lt RL gt connector terminal No 1 and between A 51 ASC ECU connector terminal No 37 and F 21 wheel speed sensor lt RL gt connector terminal No 2 Check for open or short circuit in wheel speed sensor lt RL gt circuit Q Is the check result normal YES Go to Step 11 NO Repair the wiring harness Then go to Step 15 STEP 11 Check for wheel speed sensor installation Check how the wheel speed sensor lt RL gt is installed Discon nection of wheel speed sensor loose mounting bolt etc Q Is the check result normal YES Go to Step 12 NO Reinstall the wheel speed sensor
319. ted values for cut valve and inlet valve stored in ASC ECU are not within the predetermined range PROBABLE CAUSES e ASC ECU malfunction Noise interference DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C2002 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 3 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 205 DIAGNOSIS STEP 3 Check whether the DTC is reset Q Is DTC C2002 set YES Return to Step 1 NO The procedure is complete DTC C2003 Control parameter not implement lt FWD gt A CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines If DTC
320. tem 11 Steering angle Q Is the check result normal YES Go to Step 9 NO Replace the steering wheel sensor Refer to P 35C 321 Then go to Step 10 STEP 9 Check whether the DTC is reset Drive the vehicle for 15 seconds or more at 25 mph 40 km h or higher Q Is DTC C123B set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 10 NO Goto Step 10 STEP 10 Check whether the DTC is reset Drive the vehicle for 15 seconds or more at 25 mph 40 km h or higher Q Is DTC C123B set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 161 DTC C2200 Abnormality in ASC ECU DIAGNOSIS N CAUTION If there is any problem in the CAN bus lines an incor rect DTC may be set Prior to this diagnosis diagnose the CAN bus lines Refer to GROUP 54C Diagnostic trouble code diagnosis P 54C 14 Whenever ECU is replaced ensure that the CAN bus lines are normal When the hydraulic unit integrated with ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION ASC ECU controls ASC by calculating the data sent from the wheel speed sensor the steering wheel sensor and the G and yaw rate sensor DTC SET CONDITIONS This DTC is set when ASC ECU has malfunction PR
321. tery positive voltage Q Is the check result normal YES Go to Step 9 NO The open circuit may be present in the power supply circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 32 and the fusible link No 27 Then go to Step 11 STEP 9 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the resistance between the terminal No 16 and the body ground and between the terminal No 47 and the body ground OK Continuity exists 2 Q or less Q Is the check result normal YES Go to Step 10 NO An open circuit may be present in the ground circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 16 and the body ground and between the A 51 ASC ECU connector terminal No 47 and the body ground Then go to Step 11 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 139 STEP 10 Check whether the DTC is reset Q Is DTC C2104 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 11 NO Intermittent malfunction Refer to GROUP 00 How to Cope with Intermittent Malfunction P 00 13 STEP 11 Check whether the DTC is reset Q Is DTC C2
322. th ASC ECU is replaced always carry out the calibration of the steer ing wheel sensor the G and yaw rate sensor and brake fluid pressure sensor Refer to P 35C 302 P 35C 304 and P 35C 308 OPERATION The ASC ECU is energized by the valve power supply circuit terminal No 32 When the power is supplied from the ignition switch IG1 to the IG1 relay in ETACS ECU IG1 relay is turned on At this time the valve power supply circuit terminal No 4 energizes the ASC ECU DTC SET CONDITIONS This DTC is set when the ASC ECU power supply voltage is more than 18 0 1 0 V PROBABLE CAUSES Battery failure e ASC ECU malfunction Charging system failed DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C l e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 163 STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C2101 set YES Go to Step 3 NO The procedure is complete STEP 3 Battery check Refer to GROUP 544A Battery Test P 54A 8 Q Is the batt
323. the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 3 Measure the resistance between the terminal No 32 and the body ground OK No continuity Q Is the check result normal YES Replace the fusible link No 27 Then go to Step 20 NO The short circuit may be present in the power supply circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 32 and the fusible link No 27 and then replace the fusible link No 27 Then go to Step 20 STEP 7 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Measure the voltage between terminal No 1 and body ground OK Approximately battery positive voltage Q Is the check result normal YES Go to Step 10 NO Goto Step 8 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 271 Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869NE DIAGNOSIS STEP 8 Check the fusible link No 26 Q Is the check result normal YES The open circuit may be present in the power supply circuit Repair the wiring harness between the A 51 ASC ECU connector terminal
324. the vehicle speed reaches 6 mph 10 km h when the ignition switch is turned to ON next time e 2 This DTC is not set with the vehicle speed of 12 mph 20 km h or less e 4 Does not illuminate when there is no effect to the EBD function e Does not illuminate when there is no effect to the ABS function e 6 FWD e T AWD TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 19 DIAGNOSIS Under EBD ABS skid control TCL control and HSA function in case of failure Item EBD ABS Skid control TCL HSA Abnormality in FL wheel speed sensor circuit Abnormality in FR wheel speed sensor circuit Abnormality in RL wheel speed sensor circuit Abnormality in RR wheel speed sensor circuit Abnormality in FL wheel speed sensor signal Abnormality in FR wheel speed sensor signal Abnormality in RL wheel speed sensor signal Abnormality in RR wheel speed sensor signal Enabled Enabled Prohibited Prohibited Prohibited Prohibited Prohibited Prohibited Prohibited Prohibited Mutual monitoring of FL wheel speed sensor Mutual monitoring of FR wheel speed sensor Mutual monitoring of RL wheel speed sensor Mutual monitoring of RR wheel speed sensor Enabled Prohibited Prohibited Prohibited Prohibited Abnormality in periodical signal for FL wheel speed sensor Abnormality in periodical signal for FR
325. tion received from the ETACS ECU is invalid PROBABLE CAUSES Malfunction of ETACS ECU Malfunction of engine control module ECM e ETACS ECUS have been interchanged between two vehi cles Malfunction of ASC ECU External noise interference e ASC ECUS have been interchanged between two vehicles DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T III USB Cable e MB991910 M U T III Main Harness A STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC U1417 set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 other system diagnostic trouble code Use scan tool to check whether any diagnostic trouble code related to vehicles information is set or not by the ETACS ECU or engine control module ECM Q Is the DTC set YES Troubleshoot for the relevant DTC NO Goto Step 4 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 236 DIAGNOSIS STEP 4 ETACS ECU coding data check Refer to GROUP 00 Coding List P 00 28 Vehicle line OK LANCER H B Transmission OK TC SST E
326. to Cope with Intermittent Malfunction P 00 13 e When DTC C102B is not set the following conditions may be present e Some wheels slip Unstable vehicle attitude External noise interference Vehicle ran with the parking brake applied DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C1032 set YES Go to Step 3 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 78 DIAGNOSIS STEP 3 Using scan tool MB991958 check the DTC Check that the DTC C102B is also set Q Is DTC C102B also set YES Perform the diagnosis for the DTC C102B Refer to P 35C 47 NO Goto Step 4 STEP 4 Check for wheel speed sensor installation Check how the wheel speed sensor lt RR gt is installed Discon nection of wheel speed sensor loose mounting bolt etc Q Is the check result normal YES Go to Step 5 NO Reinstall the wheel speed sensor RR correctly Refer t
327. to Step 7 NO Replace the wheel bearing Refer to GROUP 26 Front Axle Hub Assembly P 26 16 STEP 7 Check of wheel speed detection encoder Check the encoder for adhesion of foreign materials or defor mation Q Is the check result normal YES Go to Step 8 NO Adhesion of foreign materials Remove the foreign materials and clean the encoder so as not to disturb the magnetization pattern on it while taking care of the magnet magnetic substance and magnetic attraction NO Deformation Replace the wheel bearing Refer to GROUP 26 Front Axle Hub Assembly P 26 16 TSB Revision z ACTIVE STABILITY CONTROL SYSTEM ASC 35C 64 DIAGNOSIS STEP 8 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 34 and the body ground and between the ground terminal No 33 and the body ground OK 1 volt or less Q Is the check result normal YES Go to Step 9 Check harness MB991997 ASC ECU NO Not normal at the terminal No 34 or No 33 Go to Step 10 A 51 ASC ECU harness
328. to make ASC ECU relearn the neutral point Refer to P 35C 304 Then go to Step 6 STEP 5 Using scan tool MB991958 check the service data Check the following service data Refer to P 35C 291 tem 08 Lateral G sensor tem 09 G sensor tem 12 Yaw rate sensor Q Is the check result normal YES Go to Step 6 NO Replace the G and yaw rate sensor Refer to P 35C 320 Then go to Step 10 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 160 DIAGNOSIS STEP 6 Check of steering wheel sensor installation status Check that the steering wheel sensor is installed correctly Refer to P 35C 321 Q Is the check result normal YES Go to Step 7 NO After installing the steering wheel sensor properly perform the calibration of the steering wheel sensor to make ASC ECU relearn the neutral point Refer to P 35C 304 Then go to Step 7 STEP 7 Wheel alignment check Refer to GROUP 33 On vehicles service P 33 8 Q Is the check result normal YES After checking the wheel alignment perform the calibration of steering wheel sensor to make ASC ECU relearn the neutral point Refer to P 35C 304 Then go to Step 8 NO After adjusting the wheel alignment perform the calibration of steering wheel sensor to make ASC ECU relearn the neutral point Refer to P 35C 304 Then go to Step 8 STEP 8 Using scan tool MB991958 check the service data Check the following service data Refer to P 35C 291
329. tor F 02 wheel speed sensor RR connector Q Is the check result normal YES Go to Step 5 NO Repair the defective connector Then go to Step 11 TSB Revision 35C 50 ACTIVE STABILITY CONTROL SYSTEM ASC Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869DE Check harness e ASC ECU A 51 ASC ECU harness connector AC606869DF DIAGNOSIS STEP 5 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the special tool connector side NOTE Do not connect the special tool to ASC ECU 2 Turn the ignition switch to the ON position 3 Measure the voltage between the wheel speed sensor power supply terminal signal terminal No 43 and the body ground and between the wheel speed sensor ground terminal No 42 and the body ground OK 1 volt or less Q Is the check result normal YES Go to Step 6 NO Not normal at the terminal No 43 or No 42 Go to Step 8 STEP 6 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool to ASC ECU
330. tor drive circuit OFF Low or high power supply voltage in pump motor OFF Abnormality in brake fluid pressure sensor circuit OFF Abnormality in brake fluid pressure sensor output signal OFF Abnormality in stop light switch circuit OFF Prolonged operation of ASC OFF Abnormality in ASC ECU ON Abnormality in 18 0 1 0 V or battery voltage high voltage ON TSB Revision 35C 16 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS Brake warning light brake warning display ABS warning light ABS warning display ASC warning display and light ASC OFF display Brake fluid filling not completed Torque request signal rejection OFF OFF ABS warning light Flashing 1 Hz ABS warning display ON OFF CAN time out error OFF VIN not recorded OFF Re execution of variant coding OFF Abnormality in G amp yaw rate sensor Abnormality in longitudinal G sensor output value OFF Abnormality in G amp yaw rate sensor Abnormality in longitudinal G sensor output signal Abnormality in G amp yaw rate sensor Internal abnormality in G amp yaw rate sensor Brake fluid pressure sensor power supply circuit Low input Brake fluid pressure sensor power supply circuit High input Abnormality in G amp yaw rate sensor operation voltage Low volt
331. unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1047 set YES Replace the hydraulic unit ASC ECU Refer to P 35C 311 Then go to Step 15 NO The procedure is complete STEP 15 Check whether the DTC is reset 1 Erase the DTC 2 Drive the vehicle at 12 mph 20 km h or more NOTE The ABS warning light does not turn OFF in some cases unless the vehicle runs at 12 mph 20 km h or higher Q Is DTC C1047 set YES Return to Step 1 NO The procedure is complete TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS 35C 1 1 3 DTC C1048 RL wheel speed sensor control phase time exceeded Wheel Speed Sensor Circuit PINK WHITE Ba oO sIep7I8 ITJHEEEE CHEESE RE E PR LI YELLOW SKY BLUE VIOLET GREEN PINK WHITE N e gt en eo ND e 4 O d 9 Konza 4 O s5 6 7 8 9 ATT 16 1 71 8r 2921 22 p eo heh IND x Al PINK WHITE RED BLACK O C D 9 LH A 07 RH A 02 LH r 2i RH F 02 9 FRONT WHEEL SPEED SENSOR REAR WHEEL SPEED SENSOR WAS35M000A Connector A 51 Connector C 39 AC
332. w to Cope with Intermittent Malfunction P 00 13 NO The open circuit may be present in the power supply circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 8 and the C 317 ETACS ECU connector terminal No 5 Then go to Step 20 STEP 13 Resistance measurement at A 51 ASC ECU connector 1 Disconnect the C 317 ETACS ECU connector 2 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the resistance at the special tool connector side NOTE Do not connect the special tool ASC check harness MB991997 to ASC ECU 3 Measure the resistance between the terminal No 8 and the body ground OK No continuity Q Is the check result normal YES Replace the fuse No 12 Then go to Step 20 NO The short circuit may be present in the power supply circuit Repair the wiring harness between the A 51 ASC ECU connector terminal No 8 and the C 317 ETACS ECU connector terminal No 5 and then replace the fuse No 12 Then go to Step 20 TSB Revision 35C 274 ACTIVE STABILITY CONTROL SYSTEM ASC Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869NH DIAGNOSIS STEP 14 Voltage measurement at the A 51 ASC ECU connector 1 Disconnect the ASC ECU connector connect special tool ASC check harness MB991997 to the harness side connector and then measure the voltage at the spe
333. w to treat past trouble GROUP 00 How to Cope with Intermittent Malfunction P 00 13 DIAGNOSIS Required Special Tools e MB991958 Scan Tool M U T III Sub Assembly e MB991824 Vehicle Communication Interface V C I e MB991827 M U T IIl USB Cable e MB991910 M U T III Main Harness A MB991997 ASC check harness STEP 1 Using scan tool MB991958 diagnose the CAN bus lines Use scan tool to diagnose the CAN bus lines Q Is the check result normal YES Go to Step 3 NO Repair the CAN bus lines Refer to GROUP 54C CAN Bus Diagnostic table P 54C 16 On completion go to Step 2 STEP 2 DTC recheck after resetting CAN bus lines Q Is DTC C100A set YES Go to Step 3 NO The procedure is complete STEP 3 Using scan tool MB991958 check the data list Check the following service data Refer to P 35C 291 tem No 01 FL wheel speed sensor Q Is the check result normal YES Go to Step 10 NO Goto Step 4 STEP 4 Connector check A 51 ASC ECU connector A 07 wheel speed sensor FL connector Q Is the check result normal YES Go to Step 5 NO Repair the defective connector Then go to Step 11 TSB Revision ACTIVE STABILITY CONTROL SYSTEM ASC 35C 33 Check harness MB991997 ASC ECU A 51 ASC ECU harness connector AC606869CY Check harness u 3 ASC ECU A 51 ASC ECU harness connector AC606869CZ DIAGNOSIS STEP 5
334. y ground Q Is the check result normal YES Go to Step 11 NO Repair the wiring harness STEP 11 Parking brake lever stroke check Refer to GROUP 36 On vehicle Service P 36 9 Q Is the check result normal YES Go to Step 12 NO Adjust the parking brake lever stroke Refer to GROUP 36 On vehicle Service P 36 9 Then go to Step 18 STEP 12 Parking brake switch check Refer to GROUP 36 On vehicle Service P 36 10 Q Is the check result normal YES Go to Step 13 NO Replace the parking brake switch Refer to GROUP 36 Parking Brake Lever P 36 11 Then go to Step 18 STEP 13 Connector check C 117 parking brake switch connector Q Is the check result normal YES Go to Step 14 NO Repair the damaged connector STEP 14 Measure the voltage at C 117 parking brake switch connector 1 Disconnect the connector and measure at the wiring harness side 2 Turn the ignition switch to the ON position 3 Measure the voltage between the terminal No 1 and the body ground OK Battery positive voltage Q Is the check result normal YES Go to Step 17 NO Go to Step 15 STEP 15 Connector check C 04 Combination meter connector C 21 intermediate connector Q Is the check result normal YES Go to Step 16 NO Repair the defective connector TSB Revision 35C 246 ACTIVE STABILITY CONTROL SYSTEM ASC DIAGNOSIS STEP 16 Wiring harness check between the C 04 combination meter conne

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