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Troubleshooting

1. Outlet NO Faulty control unit Replace the No 28 fuse RIGHT RED BLK YEL View from terminal side Fauity solenoid View from wire side RED BLK from FR IN SOL YEL BLK from FR OUT SOL WHT BLK Repair open in WHT BLK from ALB 3 FUSE wire between the No 28 fuse and control unit Repair short in wire RED BLK Front Right Iniet YEL BLK Front Right Outlet cont d 13 63 Troubleshooting Flow Chart Problem Code 12 12 Front Left Solenoid and or Power Supply Problem Check No 26 fuse Is the fuse OK NO Replace the fuse YES Disconnect wire harness from front solenoid LEFT RED BLK YEL Check for resistance between RED and BLK terminals of front solenoid NO Is there 1 3 Q Fautty solenoid YES View from terminal side Check for resistance between YEL and BLK terminais of front solenoid NO Is there 1 3 Q Faulty solenoid YES Disconnect the 21P connector from the control unit Check for voltage between WHT GRN lead and body ground NO Repair open in WHT Is battery voltage available GRN wire between the No 26 fuse and control RED BLU YES unit from FL IN SOL Check for continuity between wire harness and body ground RED BLU Front Left Inlet YEL BLU Front Left Outlet View from wire side Repair short in wire between WHT GRN the control unit and solenoid YEL BLU from ALB 1 FUSE RED BLU Front Left Inlet
2. YEL Rear Right Negative GRY Rear Left Negative YES GRN YEL Rear Right Positive LT BLU Rear Left Positive View from terminal side Reconnect the 21P connector to the control unit and 2P connec tors to the speed sensors Connect ALB checker to inspec tion connector Check ALB function in MODE 2 BLU YEL GRN YEL d3 Ha GRY LT BLU View from wire side Does it work properly Faulty modulator YES Faulty control unit 13 54 Problem Code 5 1 to 7 8 Speed Sensor Disconnect wire harness from speed sensor Check for resistance between sensor terminals NO Is there 500 1000 Q Faulty speed sensor YES FRONT RIGHT Disconnect the 21P connector GRN BLK from the control unit GRN Check the each wires for continu ity between the sensor and con trol unit GRN BLK Front Right Positive GRN BLU Front Left Positive GRN YEL Rear Right Positive LT BLU Rear Left Positive GRN Front Right Negative BRN Front Left Negative BLU YEL Rear Right Negative GRY Rear Left Negative GRY RLO FRONT BRN FLO GRN FRO BLU YEL RRO REAR REAR RIGHT LEFT GRN BL GRN VEL LT BLU BRN BEU YEL GRY GRN BLU FL GRN BLK FRO GRN YEL RR LT BLU RLO View from wire side NO Is there continuity Repair open in sensor wire YES GRN BLK Front Right Positive GRN BLU Front Left Positive GRN YEL Rear Right Positive A LT BLU Rear Left Pos
3. are bubbles in the mod ulator reservoir tank check the accumulator fluid quantity by bleeding the high pressure line with the ALB T wrench If over 120 cc faulty accumu lator If under 70 cc modulator inlet solenoid teak or accumulator leak e If level goes up faulty modu lator assembly Does the reservoir fluid level go down and are there no bubbies in the modulator reservoir tank System is OK recheck pump mo tor to confirm no intermittent problem UPPER 120 cc NOTE The fluid enters the reservoir under pressure wait 1 or 2 minutes for air bubbles to disappear and level to stabilize 13 52 ALB From page 13 51 Measure voltage between the WHT terminal and body ground Is there battery voltage YES Repair open in WHT wire between the fuse and ump motor relay a F g PER View from terminal side Measure voltage between the WHT BLU terminal of the pump motor and body ground Repair open in WHT BLU EN wire between motor relay G and pump motor or open Is there battery voltage in BLK wire between l pump motor and ground YES or poor ground LH View from terminal side Drive G202 RH Drive Faulty pump motor G203 Problem code2 Parking Brake Switch Related Problem If the parking brake has been released the following items are possible causes If they are OK check the control unit connectors for g
4. from FL OUT SOL YEL BLU Front Left Outlet b Is there continuity Faulty control unit 13 64 ALB Problem Code 13 or 14 Rear Solenoid Related Problem Disconnect wire harness from rear solenoid Check for resistance between RED and BLK terminals of rear solenoid NO YES BLK Check for resistance between YEL and BLK terminals of rea solenoid YEL RED NO View from Terminal side Is there 1 3 Q Faulty solenoid YES RED WHT from REAR IN SOL YEL WHT from REAR OUT SOL Disconnect the 21P connector from the control unit Check for continuity between View from wire side wire harness and body ground RED WHT Rear Inlet YEL WHT Rear Outlet aan YES Repair short in wire between the sole RED WHT Rear Inlet NO YEL WHT Rear Outlet Faulty control unit 13 65
5. FT YEL BLU to FL OUT SOL RED BLU to FL IN SOL View from terminal side RED BLK from FR IN SOL YEL BLK from FR OUT SOL View from wire side Problem 8 15 Front Fail Safe Relay Circuit Remove front fail safe relay Check 13 84 _ relay function page Does it work properly 2 O YES Check for continuity between BLK lead and body ground is there continuity NO YES Turn ignition switch ON Check for voltage between YEL BLK lead and body ground Is battery voltage available NO YES Turn ignition switch OFF Disconnect the 3P connectors from the front solenoids Check for continuity in BRN BLK lead between fail safe relay and solenoids ts there continuity NO YES To page 13 58 YELLOW CONNECTOR Fauity front fail safe relay YEL BLK from No 17 FUSE BLK to GROUND View from terminal side Repair open in BLK wire between the fail safe relay and ground or poor ground G6 Repair open in YEL BLK wire between the fail safe relay and No 17 fuse 3 YELLOW CONNECTOR View from terminal side RIGHT LEFT BRN BLK to SOLENOID BRN BLK to FAIL SAFE RELAY SRN BLK View from terminal side to FAIL SAFE RELAY Repair open in BRN BLK wire between the sole noids and fail safe relay cont d 13 57 Troubleshooting Flow Chart cont d From page 13 57 Check for resistance between RED and BLK terminals of front solenoi
6. T RED BLK YEL View from terminal side solenoid i Is there 1 3 Q NO Faulty solenoid YES Disconnect the 21P and 5P con RED BLU nectors from the control unit from FL IN SOL Check for continuity between wire harness and body ground RED BLK front Right Inlet YEL BLK Front Right Outlet RED BLU Front Left Inlet YEL BLU Front Left Outlet RED BLK YEL BLU from FR IN SOL from FL OUT SOL View from wire side ven RIGHT LEFT from FR OUT SOL i YEL BLU View from wire side COT soL to FL OUT SOL RED BLK RED BLU YES Repair short in wire between to FR IN SOL to FL IN SOL control unit and front solenoids RED BLK Front Right Intet NO RED BLU Front Left Inlet YEL BLK Front Right Outlet YEL BLU Front Left Outlet Faulty control unit View from terminal side 13 62 ALB Problem Code 12 3 Front Right Solenoid and or Power Supply Check ALB 3 fuse Is the fuse OK NO YES Disconnect wire harness from front solenoids Check for resistance between RED and BLK terminals of front solenoid Is there 1 3 Q No YES Check for resistance between YEL and BLK terminals of front solenoid Disconnect the 5P connector from the control unit Check for voltage between WHT BLK lead and body ground ts battery voltage available NO YES Check for continuity between wire harness and body ground RED BLK Front Right Inlet YEL BLK Front Right
7. Troubleshooting Flow Chart Problem Code 1 Hydraulic Controlled Components NOTE The LED does not blink when the following failures occur e The contact points of the motor relay remain closed The motor runs continuously even after the ignition key is removed e YEL RED lead is shorted or the control unit is internally shorted The motor stops when the ignition switch is turned off Pre test steps e Check No 25 40A Fuse e Check all brake system hoses and pipes low and high pressure for signs of leaking bending or kinking e Check reservoir fiuid leve and if necessary fill to the MAX level Disconnect the pressure switch connector and check the continu ity between BLK and YEL termi nals Is there continuity Bleed high pressure fluid from the maintenance bleeder with the ALB T wrench See page 13 67 Check the continuity of pressure switch between BLK and YEL terminals is there continuity NO Faulty pressure switch closed Reconnect the pressure switch connector Bleed high pressure fluid from the maintenance bleeder with the ALB T wrench see page 13 67 Jack up the front of car and sup port with safety stands then run the engine in gear above 6 mph 10 km h Block rear wheels before jacking up front of car To page 13 51 13 50 From page 13 50 Does the pump motor run NO Disconnect the 21P connector from the control unit Che
8. ck for continuity between the YEL terminai and body around YES NO Connect the YEL RED terminal to body ground using a jumper wire Turn the ignition switch ON Does the pump motor run NES NO Remove the pump motor relay and check the pump motor relay page 19 70 NO Does it work properly YES Connect the WHT BLU and WHT terminals using a jumper wire Does the pump motor run NO YES Check voltage between the YEL B K and body ground Is there battery voltage No YES Repair open in YEL RED wire between the control unit and pump motor relay To page 13 52 YEL RED View from wire side Repair short in YEL wire between the control unit and pressure switch Faulty control unit Faulty pump motor relay To page 13 53 Repair open in YEL BLK wire between the No 17 fuse and pump motor relay YEL View from terminal side CAUTION If the motor runs disconr 3ct the jumper wire immediately cont d 13 51 Troubleshooting Flow Chart cont d From page 13 51 Does the pump motor run with an increasingly loud raspy sound YES Does the pump motor stop after about 60 seconds YES Pump runs with a constant soft sound Bleed air from ALB system using the procedure on page 13 67 and check the pump sound again Pump stops about 120 seconds faulty pressure switch open e if level stays the same and there
9. d Is there 1 3 Q NO YES Check for resistance between YEL and BLK terminals of front solenoid Is there 1 3 Q No YES Disconnect the 21P and 5P con nectors from the control unit Check for continuity between control unit and front solenoid RED BLK Front Right Inlet YEL BLK Front Right Outlet RED BLU Front Left Iniet YEL BLU Front Left Outlet Is there continuity No YES Faulty control unit LEFT RIGHT RED YEL RED YEL Faulty solenoid View from terminal side Faulty solenoid RIGHT LEFT YEL BLK YEL BLU to FR OUT SOL to FL OUT SOL RED BLK RED BLU to FR IN SOL to FL IN SOL View from terminal side RED BLU from FL IN SOL YEL BLU from FL OUT SOL View from wire side Repair open in wire RED BLK Front Right Inlet YEL BLK Front Right Outlet RED BLU Front Left Inlet YEL BLU Front Left Outlet RED BLK H B YEL BLK from FR OUT SOL View from wire side 13 58 Problem Code 9 or 10 Rear Solenoid Related Problem NOTE Problem Code 10 also perform troubleshooting of Problem Code 5 1 to 7 8 page 19 47 Disconnect wire harness from rear solenoid Check for resistance between RED and BLK terminals of rear solenoid Is there 1 3 Q YES Check for resistance between YEL and BLK terminals of rear solenoid is there 1 3 Q YES Disconnect the 21P connector from the control unit Check for continuity between control unit and rear sole
10. itive Check puiser air gap page 13 85 NO Repair air gap or replace the pulser rotor and or speed sensor Is the air gap OK YES Fauity control unit GRN Front Right Negative BRN Front Left Negative BLU YEL Rear Right Negative GRY Rear Left Negative cont d 13 55 Troubleshooting Flow Chart cont d Problem Code 8 1 to 8 12 Front Solenoid Related Problem LEFT RED YEL RED Disconnect wire harness from front solenoids BLK Check for resistance between RED and BLK terminals of front solenoid Is there 1 3 Q NO YES View from terminal side Faulty solenoid Check for resistance between YEL and BLK terminals of front solenoid is there 1 3 Q NO YES Disconnect the 21P and 5P con nectors from the control unit Check for continuity between control unit and front solenoid RED BLK Front Right inlet YEL BLK Front Right Outlet RED BLU Front Left Inlet YEL BLU Front Left Outlet Faulty solenoid RIGHT YEL BLK to FR OUT SOL RED BLK to FR IN SOL RED BLU from FL IN SOL YEL BLU from FL OUT SOL View from wire side Repair open in wire RED BLK Front Right Inlet YEL BLK Front Right Outlet RED BLU Front Left Inlet YEL BLU Front Left Outlet Is there continuity NC YES Faulty control unit 13 56 NOTE Problem Code 8 2 or 8 8 also perform troubleshooting of Problem Code 5 1 to 7 8 page 13 55 RIGHT YEL BLK LE
11. noid RED WHT Rear inlet YEL WHT Rear Outlet BLK YEL RED View from terminal side Faulty solenoid Faulty solenoid RED WHT YEL WHT from REAR from REAR IN SOL OUT SOL RED WHT from REAR IN SOL View from wire side YEL WHT from REAR OUT SOL View from wire side Repair open in the wire between the rear solenoid and control unit RED WHT Rear Inlet YEL WHT Rear Outlet Is there continuity YES Faulty control unit cont d 13 59 Troubleshooting Flow Chart _ _ _ aaalaaaaaauluauuuluullll iaeeMsssslMl Problem Code 11 Rear Fail Safe Relay Circuit NOTE Also perform Troubleshooting of Problem Code 9 or 10 page 13 59 Remove rear fai safe relay Check 13 86 Does it work properly No YES relay function page Check for continuity between BLK lead of wire harness and body ground C YES Turn ignition switch ON Check for voltage between YEL BLK lead of wire harness and body ground ls battery voltage available SS YES Turn ignition switch off Disconnect the 3P connector PNK from the rear solenoid Check for continuity in BLU BLK lead between fail safe relay and solenoid Is there continuity NO YES To page 13 61 PINK CONNECTOR Faulty fail safe relay YEL BLK from No 9 FUSE BLK to GROUND Repair open in BLK wi
12. ood connection If not loose or disconnected substitute a known good control unit and recheck NOTE Before Troubleshooting Problem Code 2 remove the No 27 fuse for three seconds to clear the control unit s memory then test drive the car If the warning light and LED stay off the probability is that the car was driving with the parking brake applied The parking brake is applied for more than 30 seconds while driving The brake fluid levei in the master cylinder is too low GRN RED lead is shorted between the warning light and parking brake switch GRN RED lead is shorted between the warning light and brake fluid level switch The warning light is blown GRN RED has an open between the warning light and parking brake GRN RED has an open between the parking brake switch and control unit cont d 13 53 Troubleshooting Flow Chart cont d Problem code 4 4 to 4 12 Rear Speed Sensor SENSOR SIDE CONNECTOR Disconnect wire harness from speed sensor sensor terminals Check for resistance between NO Is there 500 1 000 Q Faulty speed sensor YES Disconnect the 21P connector REAR REAR from the control unit RIGHT LEFT GRN YEL LT BLU Check the sensor wire for conti nuity between the control unit YEL GRY and each speed sensor BLU BLU YEL Rear Right Negative GRY Rear Left Negative GRN YEL Rear Right Positive LT BLU Rear Left Positive NO Repair open in the sensor wire BLU
13. re between the relay and ground or poor ground G202 View from terminal side Repair open in YEL BLK wire between the relay and No 17 fuse BLU BLK BLU BLK c g View from terminal side Repair open in BLU BLK wire between the relay and solenoid 13 60 From page 13 60 Disconnect the 21P connector from the control unit Check for continuity in YEL GRN lead between fail safe relay and control unit Is there continuity YES PINK CONNECTOR YEL GRN to CONTROL UNIT View from terminal side Repair open in YEL GRN wire between the relay and control unit Check for continuity between control unit and rear solenoid RED WHT Rear inlet YEL WHT Rear Outlet Is there continuity Repair open in wire be tween the solenoid and control unit RED WHT Rear Iniet XES YEL WHT Rear Outlet RED WHT Faulty control unit YEL WHT to REAR to REAR IN SOL OUT SOL View from terminal side RED WHT from REAR IN SOL YEL WHT from REAR OUT SOL YEL GRN from FAIL SAFE RELAY View from wire side cont d 13 61 Troubleshooting Flow Chart cont d Problem Code 12 1 12 2 12 4 or 12 8 Front Solenoid LEFT RED BLK YEL Disconnect wire harness from front solenoids View from terminal side Check for resistance between RED and BLK terminals of front solenoid YES Check for resistance between YEL and BLK terminals of front RIGH

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