2001 impreza service manual quick reference index
Contents
1. 6138 NT 613 112 4 5 6 7 1231415 617 9 10 11 2021 22 23 24 25 26 2728 12824555578 12 13 14 15 16 17 18 19 20 21 22 23 24 GL91 20A IM 6 IMMOBILIZER CONTROL MODULE I O SIGNAL IMMOBILIZER DIAGNOSTICS IMMOBILIZER CONTROL MODULE e LI lt DIODE w WAGON z lt FRONT DOOR SWITCH RH REAR DOOR REAR GATE LATCH SWITCH RH SWITCH WAGON REAR DOOR SWITCH LH ie REF GWD 04 05 GND 03 REF TO GND 02 03 GE 822 eRowN 112 T z 12 3 415 BROWN 4 5 6 9 1 1 2 3 4 7 8 9 10 11 12 8268 6 1121310 5 6 7 8 1 9 10 11 12 2 16 B99 3 1 9 12 1314115 16117118119202112212324 GL91 20B IM 7 IMMOBILIZER CONTROL MODULE I O SIGNAL IMMOBILIZER DIAGNOSTICS2. IMMOBILIZER RHD MODEL TO POWER SUPPLY ROUTING MB 10 MB 9 FB 21 MB 6 FUSE NO 2 SBF 5 F B FUSE NO 11 M B FUSE NO 6 B B IG B IMB R 01 IMB R 01 ENGINE MODEL A NON TARBO ENGINE MODEL KEY WARNING SWITCH ENGINE CONTROL MODULE TB BLACK A GREEN BLACK 813 1 2 3 4 s 1 2 3 41516 1231415 617 819 1 2 3 51617 2 6 7 8 9 011 2 7 8 9 101112113141 1 2 13 14 15 16 17 18 19 20 2122 8 9 po tt t2 13 14 15 16 17 18 19 2021 22 23 24 25 26 27 28 8135 T8 B tT GREEN 7 9 Dx 8 9 ropripapia 12 1314 1151617 1819 15 16 17 18 19 20 21 223 24 25 26 27 28 29 30 221121 23 24125 25 27 28 22123 24 25 26 27 28 29 36 31 32 GR91 20A IM 8 IMMOBILIZER CONTROL MODULE I O SIGNAL IMMOBILIZER DIAGNOSTICS DIODE WAGON ANTENNA FRONT DOOR SWITCH LH REAR DOOR REAR GATE LATCH SWITCH RH SWITCH WAGON
3. disconnect read read memory con memory connec nector tor IM 12 READ DIAGNOSTIC TROUBLE CODE IMMOBILIZER DIAGNOSTICS The CHECK ENGINE malfunction indicator lamp MIL flashes the code corresponding to the faulty parts The long segment 1 3 seconds ON indicates a ten and the short segment 0 2 seconds ON signifies one And middle segment 0 5 seconds ON means OK code Fordetailed concerning diagnostic trouble codes refer to the List of Diagnostic Trouble Code Ref to IM 20 LIST List of Diagnostic Trouble Code gt OK code Trouble code 13 Trouble code 21 Unit second S2M1768A IM 13 CLEAR MEMORY MODE IMMOBILIZER DIAGNOSTICS 7 Clear Memory Mode A OPERATION 1 WITH SUBARU SELECT MONITOR 1 On the Main Menu display screen select the 2 Each System Check and press the YES key 2 On the System Selection Menu display screen select the Engine Control System and press the YES key 3 Press the YES key after displayed the information of engine type 4 On the Engine Diagnosis display screen select the Clear Memory and press the YES key 5 When the Done and Ignition Switch OFF are shown on the display screen turn the Subaru Select Monitor and ignition switch to OFF NOTE After the memory has been cleared the ISC must be initialized To do this turn the ignition switch to the ON posi
4. REAR DOOR SWITCH LH E REF TO GND 03 REF TO GND 02 03 172 1 1 2 HAE plas 1234 2 3 4 41516 111 5 6 7 8 8268 9 10 17 12 1314 15 16 2 B99 3 1 2 3 4 5 6 7 8 ojom 1213 1415 1617 1819120 1212223 24 GR91 20B IM 9 SUBARU SELECT MONITOR IMMOBILIZER DIAGNOSTICS 5 Subaru Select Monitor A OPERATION 1 HOW TO USE SUBARU SELECT MONI TOR 1 Prepare Subaru Select Monitor kit 52 0285 2 Connect diagnosis cable to Subaru Select Mon itor 3 Insert cartridge into Subaru Select Monitor 52 0286 4 Connect Subaru Select Monitor to data link con nector 1 Data link connector located in the lower por tion of the instrument panel on the driver s side 0768 2 Connect diagnosis cable to data link nector CAUTION Do not connect scan tools except for Subaru Select Monitor EJ 5 Turn ignition switch to ON engine OFF and Subaru Select Monitor switch to ON Power switch 52 0288 6 Using Subaru Select Monitor call up diagnostic trouble code s and various data then record them 2 READ DIAG
5. Diagnostic Trouble Code gt Ref to EN SOHCw oOBD 66 List of Diagnostic Trouble Code DTC gt or Ref to EN DOHC TURBO 69 List of Diagnostic Trouble Code gt IM 20 DIAGNOSTICS CHART WITH TROUBLE CODE IMMOBILIZER DIAGNOSTICS 10 Diagnostics Chart with Trouble Code A DTC P1571 REFERENCE CODE INCOMPATIBILITY DIAGNOSIS Reference code incompatibility between IMM ECM and ECM PERFORM TEACHING OPERATION ON IG 15 teaching operation for all Replace ECM NITION KEY keys completed Ref to Perform teaching operation on all keys of the FU SOHC 48 vehicle Refer to teaching operation manual Engine Control Module Ref to FU SOHCw oOBD 44 Engine Control Module gt or lt Ref to FU DOHC TURBO 45 Engine Control Module gt IMM ECM lt Ref to SL 44 Immobilizer Control Module gt and then replace all ignition keys including the tran sponder Then perform teaching operation Refer to teaching opera tion manual Pub No S0820GZ IM 21 DIAGNOSTICS CHART WITH TROUBLE CODE IMMOBILIZER DIAGNOSTICS B DTC P1572 IMM CIRCUIT FAILURE EXCEPT ANTENNA CIRCUIT DIAGNOSIS Communication failure between IMM ECM WIRING DIAGRAM BATTERY IGNITION SWITCH SBF 1 SBF 4 Q gt F B No 11 o o ORO O O SBF 5 ENGINE MODEL NON TURBO ENGINE MODEL LHD MODEL B23 RHD MODEL B22 LHD MODEL
6. Immobilizer Con vehicle Refer to teaching operation manual trol Module and Pub 5082002 then replace all ignition keys including the tran sponder Then perform teaching operation Refer to teaching opera tion manual Pub No 5082002 E DTC P1576 EGI CONTROL MODULE EEPROM DIAGNOSIS ECM malfunctioning 1 REPLACE ECM Replace ECM Ref to FU SOHC 48 Engine Control Module gt Ref to FU SOHCw oOBD 44 Engine Control Module or Ref to FU DOHC TURBO 45 Engine Control Module Then perform teaching operation Refer to teaching operation manual Pub 5082002 F DTC P1577 IMM CONTROL MODULE EEPROM DIAGNOSIS IMM ECM malfunctioning 1 REPLACE IMM ECM Replace IMM ECM Ref 51 44 Immobilizer Control Module and then replace all ignition keys includ ing the transponder Then perform teaching operation Refer to teaching operation manual Pub No 5082002 IM 27 DIAGNOSTICS CHART WITH TROUBLE CODE IMMOBILIZER DIAGNOSTICS G DTC P1570 ANTENNA DIAGNOSIS Faulty antenna WIRING DIAGRAM ANTENNA IMMOBILIZER CONTROL MODULE B6M1534 IM 28 DIAGNOSTICS CHART WITH TROUBLE CODE IMMOBILIZER DIAGNOSTICS CHECK ANTENNA CIRCUIT 1 Turn ignition switch OFF 2 Disconnect harness antenna connector from IMM ECM Ref to SL 45 Immobilizer Antenna 3 Measure resistance of antenna circuit Conn
7. Ref to SL 44 Immobilizer Con trol Module and then replace all ignition keys including the tran sponder Then perform teaching operation Refer to teaching opera tion manual Pub No 5082002 CHECK IGNITION KEY TRANSPONDER 1 Remove the key from ignition switch 2 Start engine using other keys that have undergone the teaching operation furnished with vehicle Does engine start IM 26 Replace ignition key including the transponder Then perform teaching opera tion Refer to teaching opera tion manual Pub 8082062 Replace IMMECM lt Ref to SL 44 Immobilizer Con trol Module gt and then replace all ignition keys including the tran sponder Then perform teaching operation Refer to teaching opera tion manual Pub S0820GZ DIAGNOSTICS CHART WITH TROUBLE CODE IMMOBILIZER DIAGNOSTICS D DTC P0153 INCORRECT IMMOBILIZER KEY USE OF UNREGISTERED KEY DIAGNOSIS Use of unregistered key in IMM ECM Step Check No PERFORM TEACHING OPERATION ON IG jls teaching operation for all Replace all ignition NITION KEY keys completed keys including the Perform teaching operation on all keys of the transponder Go vehicle Refer to teaching operation manual to step 2 Pub 5082002 PERFORM TEACHING OPERATION ON IG jls teaching operation for all Replace IMM ECM NITION KEY keys completed Ref to SL 44 Perform teaching operation on all keys with
8. connectors are colored yellow Do not use electrical test equipment on these circuits Becareful not to damage airbag system wir ing harness when servicing the immobilizer control module While diagnostic items are being checked do not operate radios portable telephones etc which emit electromagnetic waves near or inside the vehicle 6 0616 When ignition switch is being turned ON OFF while diagnostic items are being checked do not allow keys with different ID codes close to the ignition switch If ignition key is in a key holder remove it from holder before carrying out diagnoses No good 6 0617 3 IMMOBILIZER DIAGNOSTICS When repeatedly turning ignition ON or OFF while diagnostic items are being checked it should be switched in cycles of ON for at least 5 seconds OFF for at least 8 seconds ON Ignition switch position SEC B6M0618A engine fails to start with a registered ignition key detach ignition key from ignition switch and wait for approximately 1 second until immobilizer indicator light begins to flash Start engine again Before checking diagnostic items obtain all keys for vehicle to be checked possessed by owner GENERAL DESCRIPTION IMMOBILIZER DIAGNOSTICS B PREPARATION TOOL 1 SPECIAL TOOLS ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS 22771AA030 SELECT MONITOR Troubleshooting for electrical sy
9. 2001 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX BODY SECTION SYSTEM HEATER VENTILATOR AND HVAC SYSTEM AUTO A C DIAGNOSTICS AIRBAG SYSTEM AIRBAG SYSTEM DIAGNOSTICS This service manual has been prepared to provide SUBARU service personnel with the necessary information and data for the correct maintenance and repair oF SUBARU vehicles LIGHTING SYSTEM This manual includes the procedures for maintenance disassembling reas sembling inspection and adjustment of WIPER AND WASHER SYSTEMS components and diagnostics for guid ance of experienced mechanics Please peruse and utilize this manual ENTERTAINMENT fully to ensure complete repair work for satisfying our customers by keeping their vehicle in optimum condition COMMUNICATION SYSTEM When replacement of parts during repair work is needed be sure to use SUBARU genuine parts GLASS WINDOWS MIRRORS GW SEAT BELT SYSTEM BODY STRUCTURE BS INSTRUMENTATION DRIVER INFO 10 SEATS SE SECURITY AND LOCKS SL IMMOBILIZER DIAGNOSTICS IM SUNROOF T TOP CONVERTIBLE cp SUNROOF All information illustration and specifi cations contained in this manual are based on the latest product information available at the time of publication approval EXTERIOR INTERIOR TRIM HEAVY INDUSTRIES LTD G1830GE6 Ha capo OA e DA F 2001 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX BODY SECTION CRUISE CONTRO
10. B22 RHD MODEL B23 LHD MODEL B5 RHD MODEL B14 LHD MODEL B14 RHD MODEL B5 N ENGINE B CONTROL ENGINE 6135 MODULE IMMOBILIZER CONTROL MODULE MODULE n IAE 45 6 7 23456 71819 Es 8 9 to t1 t2 i3 14 15 t6 17 t8 19 10 11 12 13 14 15 16 17 18 19 6171819 101112 2021 22123 24 25 26 2728 2012122 23 24 25 26 27 28 BO0151 IM 22 DIAGNOSTICS CHART WITH TROUBLE CODE CHECK POWER SUPPLY CIRCUIT OF IMM ECM 1 Turn ignition switch OFF 2 Disconnect harness connector from IMM ECM 3 Measure voltage between IMM ECM har ness connector terminal and chassis ground Connector amp terminal B141 No 10 No 11 Chassis ground Is the voltage more than 10 V IMMOBILIZER DIAGNOSTICS Check harness for open or short between IMM ECM and fuse Go to step 2 CHECK POWER SUPPLY CIRCUIT OF IMM ECM 1 Turn ignition switch ON Engine OFF 2 Measure voltage between IMM ECM har ness connector terminal and chassis ground Connector amp terminal B141 No 12 Chassis ground Is the voltage more than 10 V Check harness for open or short between IMM ECM and ignition switch Go to step 3 CHECK GROUND CIRCUIT OF IMM ECM 1 Turn ignition switch OFF 2 Measure resistance between IMM ECM har
11. L SYSTEM CRUISE CONTROL SYSTEM CC DIAGNOSTICS G1830GE6 ES IMMOBILIZER DIAGNOSTICS Page 1 Basic Diagnostic Procedure ied oett bile 2 2 GeneralDescriptioDi oio e o ted uc 3 3 Electrical Components 5 4 Immobilizer Control Module 6 5 Subaru Select ri aec RON ONERE e EM ed 10 6 Read Diagnostic Trouble Code pp 12 7 Clear Memory 14 8 Diagnostics Chart for Immobilizer Indicator 16 9 List of Diagnostic Trouble Code 20 10 Diagnostics Chart with Trouble 21 BASIC DIAGNOSTIC PROCEDURE IMMOBILIZER DIAGNOSTICS 1 Basic Diagnostic Procedure A PROCEDURE CHECK ILLUMINATION OF IMMOBILIZER INDICATOR LIGHT Turn ignition switch ON Does immobilizer indicator light illuminate Go to step 2 Go to step 3 CHECK ENGINE START Turn ignition switch to START position CHECK ILLUMINATION OF IMMOBILIZER INDICATOR LIGHT 1 Turn ignition switch to OFF or ACC position 2 Wait at least 60 seconds Is the engine hard to start Does immobilizer indicator light blink Go to step 5 Go to step 4 Go to step 3 Check immobilizer
12. MMOBILIZER INDICATOR LIGHT IMMOBILIZER DIAGNOSTICS 8 Diagnostics Chart for Immobilizer Indicator Light A INSPECTION 1 CHECK IMMOBILIZER INDICATOR CIRCUIT WIRING DIAGRAM BATTERY SBF 1 M B No 2 o o Ox 2 0 IGNITION SWITCH SBF 5 SBF 4 F B No 11 OR OX 19 LHD MODEL RHD MODEL IMMOBILIZER INDICATOR LHD MODEL 17 RHD MODEL 22 415 3 4 5 6 il2 T3 4 5Te v T8 o 1 3 4 5 6 7 89 1011213 14 10 11 12 13 14 2 3 2 4 6789 1011112 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 00 HHP Em 121314 516 7 8 9 1123145 61718 10111121131411516 17118 19 20 21 12 13 1415116 17118 19 20 211 2 03 24 PONES IEEE EESWETES 800149 IM 16 DIAGNOSTICS CHART FOR IMMOBILIZER INDICATOR LIGHT IMMOBILIZER DIAGNOSTICS CHECK IMMOBILIZER INDICATOR LIGHT COMES ON 1 Turn ignition switch OFF 2 Disconnect harness connector from IMM EOM 3 Connect a resistor 750 between IMM harness connector terminal No 9 and chassis ground CHECK IMM ECM GROUND CIRCUIT Measure resistance between IMM ECM har ness connector terminal and chassis ground Connector amp terminal B141 No 2 No 3 Chassis ground 9 Does indicator light comes on Is the resistance le
13. Measure resistance between IMM ECM har ness connector terminal and combination meter harness connector terminal Connector amp terminal B141 No 9 i11 No 6 Is the resistance less than 10 Q IM 17 Faulty LED bulb Replace combina tion meter printed circuit lt Ref to IDI 20 DISAS SEMBLY Combi nation Meter Assembly gt Repair harness or connector DIAGNOSTICS CHART FOR IMMOBILIZER INDICATOR LIGHT IMMOBILIZER DIAGNOSTICS 2 CHECK KEY SWITCH CIRCUIT WIRING DIAGRAM BATTERY M B No 6 0 0 90 LHD MODEL RHD MODEL KEY WARNING SWITCH IMMOBILIZER CONTROL MODULE 1 1 21 3 4 5 172131415 6789 1011 2 6 718 9 101 12 12 13 14 15 16 17 18 19 20 21 22 23 24 BO0150 IM 18 DIAGNOSTICS CHART FOR IMMOBILIZER INDICATOR LIGHT IMMOBILIZER DIAGNOSTICS CHECK POWER SUPPLY CIRCUIT 1 Disconnect harness connector from key warning switch 2 Turn ignition switch ACC or LOCK position The key inserted 3 Measure voltage between key warning switch harness connector terminal and chassis ground Connector amp terminal B74 No 2 Chassis ground Is the voltage more than 10 V Go to step 2 Check harness for open or short between key warn ing switch and fuse CHECK KEY SWITCH 1 Insert the ignition key to the ignition switch OFF or ACC position 2 Check continuity between key war
14. N Engine OFF 2 Measure voltage between IMM ECM har ness connector terminal and chassis ground Connector amp terminal B141 No 1 No 6 Chassis ground Check Is the voltage 0 V Yes Go to step 7 No Repair harness between IMM ECM and ECM because there is short circuit in bat tery voltage line or ignition switch 9 line 7 CHECK HARNESS OF COMMUNICATION 15 the voltage 0 V Go to step 8 Repair harness LINE between IMM Measure voltage between ECM harness con ECM and ECM nector terminal and engine ground because there is Connector amp terminal short circuit in bat Non turbo engine model tery voltage line or B135 No 22 No 23 Engine ignition switch ground ON line Turbo engine model B135 No 5 No 14 Engine ground 8 CHECK ECM BY INTERFACE CHECK Does Commun Line Shorted Replace ECM Go to step 9 1 Connect harness connector to ECM to Ground appear on screen Ref to 2 Disconnect harness connector from IMM FU SOHC 48 ECM Engine Control 3 Perform interface check lt Ref to IM 10 Module gt lt Ref to INTERFACE CHECK Subaru Select Monitor gt FU SOHCw 44 Engine Control Module gt or lt Ref to FU DOHC TURBO 45 Engine Control Module gt Then perform teaching operation Refer to teaching opera tion manual Pub No 5082002 9 CHECK ECM BY INTERFACE CHECK Does Commun Line Shorted Replace ECM Go to s
15. NOSTIC TROUBLE CODE DTC FOR ENGINE Refer to Read Diagnostic Trouble Code for infor mation about how to indicate DTC Ref to IM 12 Read Diagnostic Trouble Code 3 INTERFACE CHECK NOTE Communication line between ECM and IMM ECM can be checked in System Operation Check Mode This is referred to as interface check 1 Connect select monitor 2 Set the System Operation Check Mode menu display screen then select Immobilizer System 3 Screen indicates as shown Communication Line Check In process Press to Quit 56 0210 10 SUBARU SELECT MONITOR IMMOBILIZER DIAGNOSTICS 4 Start interface check 5 Does Communication Line not Shorted appear on screen If YES Go to step 6 If NO Go to step 7 Communication Line Check Communication Line not Shorted Check Procedure Completed 56 0211 6 After diagnostic results it is determined that short circuit is not a diagnostic item This completes interface check 7 a problem is detected repair Ref to IM 22 DTC P1572 IMM CIRCUIT FAILURE EXCEPT ANTENNA CIRCUIT Diagnostics Chart with Trouble Code IM 11 READ DIAGNOSTIC TROUBLE CODE IMMOBILIZER DIAGNOSTICS 6 Read Diagnostic Trouble Code A OPERATION 1 WITH SUBARU SELECT MONITOR 1 On the Main Menu display screen select the Each System Check and press the YES key 2 On the System Selection Menu dis
16. ch OFF 2 Connect antenna harness connector to IMM ECM 3 Insert the key to ignition switch measure changes in voltage between antenna harness connector Connector amp terminal B142 No 1 No 2 Approximately 0 1 second after inserting the key Is the voltage 0 V Approximately 1 second after inserting the key Ref to SL 44 Immobilizer Con trol Module and then replace all ignition keys including the tran sponder Then perform teaching operation Refer to teaching opera tion manual Pub S0820GZ CHECK IGNITION KEY TRANSPONDER 1 Remove key from ignition switch 2 Start engine using other keys that have undergone the teaching operation furnished with vehicle Does engine start IM 29 Replace ignition key including the transponder Then perform teaching opera tion Refer to teaching opera tion manual Pub 5082002 Replace IMM ECM Ref to SL 44 Immobilizer Con trol Module and then replace all ignition keys including the tran sponder Then perform teaching operation Refer to teaching opera tion manual Pub 5082002 DIAGNOSTICS CHART WITH TROUBLE CODE IMMOBILIZER DIAGNOSTICS IM 30
17. d ECM Communication failure between IMM ECM and ECM Failure of IMM ECM to verify key transponder ID code Ref to IM 21 DTC P1571 REFER ENCE CODE INCOMPATIBILITY Diagnostics Chart with Trouble Code Ref to IM 22 DTC P1572 IMM CIR CUIT FAILURE EXCEPT ANTENNA CIRCUIT Diagnostics Chart with Trouble Code Ref to IM 26 DTC P1574 KEY COMMUNICATION FAILURE Diag nostics Chart with Trouble Code gt Use of Unregistered Key Incorrect immobilizer key Use of unregistered key in IMM ECM Ref to IM 27 DTC P0153 INCOR RECT IMMOBILIZER KEY USE OF UNREGISTERED KEY Diagnostics Chart with Trouble Code EGI Control Module EEPROM ECM malfunctioning Ref to IM 27 P1576 CON TROL MODULE EEPROM Diagnos tics Chart with Trouble Code IMM Control Module EEPROM IMM ECM malfunctioning Ref to IM 27 DTC P1577 IMM CONTROL MODULE EEPROM Diagnostics Chart with Trouble Code gt ANTENNA Faulty antenna lt Ref to IM 28 DTC P1570 ANTENNA Diagnostics Chart with Trouble Code gt Whenreading diagnostic trouble code except with SUBARU SELECT MONITOR the item cannot be spec ified Therefore diagnose for all items When a diagnostic trouble code except for the above immobilizer trouble code has been output carry out diagnosis for the engine trouble code Ref to EN SOHC 81 List of
18. ector amp terminal B142 No 1 No 2 Check Is the resistance less than 10 Q Yes Go to step 2 No Replace antenna Ref to SL 45 Immobilizer Antenna CHECK ANTENNA CIRCUIT Is the resistance less than 10 Replace antenna Go to step 3 Measure resistance between antenna harness Q Ref to SL 45 connector and chassis ground Immobilizer Connector amp terminal Antenna B142 No 1 Chassis ground CHECK ANTENNA CIRCUIT Is the resistance less than 10 Replace antenna to step 4 Measure resistance between antenna harness 0 Ref to SL 45 connector and chassis ground Immobilizer Connector amp terminal Antenna B142 No 2 Chassis ground CHECK ANTENNA CIRCUIT Is the voltage 0 V Go to step 5 Replace antenna 1 Turn ignition switch ON Engine OFF Ref to SL 45 2 Measure voltage between antenna harness Immobilizer connector and chassis ground Antenna Connector amp terminal B142 No 1 Chassis ground CHECK ANTENNA CIRCUIT Is the voltage 0 V Go to step 6 Repair harness Measure voltage between antenna harness between IMM connector and chassis ground ECM and antenna Connector amp terminal because there is B142 No 2 Chassis ground short circuit in bat tery voltage line or ignition switch ON line CHECK IMM ECM FUNCTION Is the voltage 30 to 30 V Go to step 7 Replace IMM ECM 1 Turn ignition swit
19. indicator light cir cuit lt Ref to IM 16 CHECK IMMOBI LIZER INDICA TOR CIRCUIT Diagnostics Chart for Immobilizer Indicator Light CHECK ILLUMINATION OF IMMOBILIZER INDICATOR LIGHT Remove key from ignition switch Does immobilizer indicator light bigin to blink 5 seconds after the key is removed The immobilizer system is OK Check key switch circuit Ref to IM 18 CHECK KEY SWITCH CIR CUIT Diagnostics Chart for Immobi lizer Indicator Light CHECK INDICATION OF DTC ON DISPLAY 1 Turn ignition switch OFF 2 Connect the Subaru Select Monitor to data link connector Ref to IM 10 Subaru Select Monitor 3 Turn ignition switch and Subaru Select Moni tor switch ON 4 Read DTC on the display Is trouble code indicated on display Go to step 6 Repair the related parts PERFORM THE DIAGNOSIS 1 Inspect using Diagnostics Chart with Trou ble Code lt Ref to IM 21 Diagnostics Chart with Trouble Code 2 Repair the trouble cause 3 Perform clear memory mode 4 Read DTC again Is trouble code indicated on display IM 2 Inspect using Diagnostic Chart with Trouble Code lt Ref to IM 21 Diagnos tics Chart with Trouble Code gt Finish the diag nostics GENERAL DESCRIPTION 2 General Description A CAUTION CAUTION Airbag system wiring harness is routed near the immobilizer control module airbag sys tem wiring harness and
20. ness connector terminal and chassis ground Connector amp terminal B141 No 2 No 3 Chassis ground 2 CHECK HARNESS BETWEEN IMM ECM AND ECM 1 Disconnect harness connector from ECM and IMM ECM 2 Measure resistance between IMM ECM har ness connector terminal and ECM harness connector terminal Connector amp terminal LHD non turbo engine model B141 No 1 B135 No 22 RHD non turbo engine model B141 No 1 B135 No 23 LHD turbo engine model B141 No 1 B135 No 14 RHD turbo engine model B141 No 1 B135 No 5 Is the resistance less than 10 Q Is the resistance less than 10 Q Go to step 4 Repair open circuit of IMM ECM ground circuit Go to step 5 Repair open circuit of harness between IMM ECM and ECM CHECK HARNESS BETWEEN IMM ECM AND ECM Measure resistance between IMM ECM har ness connector terminal and ECM harness connector terminal Connector amp terminal LHD non turbo engine model B141 No 6 B135 No 23 RHD non turbo engine model B141 No 6 B135 No 22 LHD turbo engine model B141 No 6 B135 No 5 RHD non turbo engine model B141 No 6 B135 No 14 Is the resistance less than 10 Q IM 23 Go to step 6 Repair open circuit of harness between IMM ECM and ECM DIAGNOSTICS CHART WITH TROUBLE CODE IMMOBILIZER DIAGNOSTICS CHECK HARNESS OF COMMUNICATION LINE 1 Turn ignition switch O
21. ning switch connector terminals Connector amp terminal No 1 2 Dose continuity exist Go to step 3 Replace key warn ing switch CHECK KEY SWITCH 1 Remove the ignition key from the ignition switch 2 Check continuity between key warning switch connector terminals Connector amp terminal No 1 2 CHECK HARNESS BETWEEN KEY SWITCH Is the resistance less than 10 AND IMM ECM 1 Disconnect harness connector from key warning switch 2 Disconnect harness connector from IMM ECM 3 Measure resistance between key warning switch harness connector terminal and IMM ECM harness connector terminal Connector amp terminal B74 No 1 B141 No 4 Does continuity exsit IM 19 Replace key warn ing switch Replace IMM ECM Ref to SL 44 Immobilizer Con trol Module and then replace all ignition keys including the tran sponder Then perform teaching operation Refer to teaching opera tion manual Pub No 5082002 Go to step 4 Repair harness between key warn ing switch and IMM ECM LIST OF DIAGNOSTIC TROUBLE CODE DTC IMMOBILIZER DIAGNOSTICS 9 List of Diagnostic Trouble Code DTC A LIST DTC Without OBD With OBD Item Contents of diagnosis Index No NOTE P1571 Reference Code Incompati bility IMM Circuit Failure Except Antenna Circuit Key Communication Failure Reference code incompatibility between IMM ECM an
22. play screen select the Engine Control System and press the YES key 3 Press the YES key after displayed the information of engine type 4 On the Engine Diagnosis display screen select the Diagnostic Code s Display and press the YES key 5 Diagnostic Code s Display display screen select the Current Diagnostic Code s or History Diagnostic Code s and press the YES key NOTE For detailed operation procedure refer to the SUBARU SELECT MONITOR OPERATION MANUAL Fordetailed concerning diagnostic trouble codes refer to the List of Diagnostic Trouble Code Ref to IM 20 LIST List of Diagnostic Trouble Code gt 2 WITHOUT SUBARU SELECT MONITOR Step Check Yes No CHECK STATUS OF CHECK ENGINE MAL Does the MIL come Go to step 2 Check the follow FUNCTION INDICATOR LAMP MIL ing and repair if 1 Turn ignition switch to OFF necessary 2 Connect read memory connector Ref to NOTE EN SOHCw oOBD 10 LOCATION Electrical Open or short Components Location circuit in engine 3 Turn ignition switch to ON control module power supply or ground line Open or short circuit in CHECK ENGINE malfunc tion indicator lamp CHECK DIAGNOSTIC TROUBLE CODE Does the MIL indicate diagnos Record diagnostic Complete read DTC tic trouble code DTC trouble code diagnostic trouble DTC Then code Turn ignition ignition switch to switch to OFF and OFF disconnect
23. ss than 10 0 Go to step 2 Go to step 3 Go to step 5 Repair open circuit of IMM ECM ground circuit CHECK IMM ECM IGNITION CIRCUIT 1 Turn ignition switch ON Engine OFF 2 Measure voltage between IMM ECM har ness connector terminal and chassis ground Connector amp terminal B141 No 12 Chassis ground Is the voltage more than 10 V Go to step 4 Check harness for open or short between IMM ECM and ignition switch CHECK IMM ECM POWER SUPPLY CIR CUIT 1 Turn ignition switch OFF 2 Measure voltage between IMM ECM har ness connector terminal and chassis ground Connector amp terminal B141 No 10 No 11 Chassis ground Is the voltage more than 10 V Replace IMM ECM Ref to SL 44 Immobilizer Con trol Module and then replace all ignition keys including the tran sponder Then perform teaching operation Refer to teaching opera tion manual Pub No 5082002 Check harness for open or short between IMM ECM and fuse CHECK COMBINATION METER CIRCUIT 1 Remove combination meter Ref to IDI 19 Combination Meter Assembly 2 Measure voltage between combination meter harness connector terminal and chassis ground Connector amp terminal i10 No 10 Chassis ground Is the voltage more than 10 V Go to step 6 Check harness for open or short between combina tion meter and fuse CHECK COMBINATION METER CIRCUIT
24. stems KIT English 22771AA030 Without printer German 22771AA070 Without printer French 22771AA080 Without printer Spanish 22771 090 Without printer B2M3877 2 GENERAL TOOLS TOOL NAME REMARKS Circuit Tester Used for measuring resistance voltage and ampere IM 4 ELECTRICAL COMPONENTS LOCATION IMMOBILIZER DIAGNOSTICS 3 Electrical Components Location A LOCATION 2 Ss 4 v T BO0010 Antenna Immobilizer indicator light LED bulb Immobilizer control module IMM ECM 4 Transponder NOTE IMM ECM location for RHD model is symmetrically opposite IM 5 IMMOBILIZER CONTROL MODULE I O SIGNAL IMMOBILIZER DIAGNOSTICS 4 Immobilizer Control Module I O Signal A SCHEMATIC 1 IMMOBILIZER LHD MODEL TO POWER SUPPLY ROUTING FB 9 MB 9 FB 21 MB 6 M B FUSE NO 2 SBF 5 F B FUSE NO 11 M B FUSE NO 6 B B IG B tr lt a TURBO ENGINE MODEL NON TARBO ENGINE MODEL KEY WARNING SWITCH 872 BLACK A Q10 GREEN 836 BLACK 1 1 213 4 1127314 1516 17 819 11213 415 112 3141516 7 8 9 1o t1 2 5678 6171819101112 12 13 14 15 16 17 18 19 20 21 22 28 24
25. tep 10 Perform interface check to Battery appear on screen lt Ref to IM 24 FU SOHC 48 Engine Control Module gt lt Ref to FU SOHCw oOBD 44 Engine Control Module gt or lt Ref to FU DOHC TURBO 45 Engine Control Module gt Then perform teaching operation Refer to teaching opera tion manual Pub No S0820GZ DIAGNOSTICS CHART WITH TROUBLE CODE IMMOBILIZER DIAGNOSTICS CHECK ECM BY INTERFACE CHECK Perform interface check Does Communication Line not Shorted appear on screen IM 25 Replace IMM ECM Ref to SL 44 Immobilizer Con trol Module and then replace all ignition keys including the tran sponder Then perform teaching operation Refer to teaching opera tion manual Pub No 5082002 When Check Time Out appears on screen perform interface check again DIAGNOSTICS CHART WITH TROUBLE CODE IMMOBILIZER DIAGNOSTICS C DTC P1574 KEY COMMUNICATION FAILURE DIAGNOSIS Failure of IMM to verify key transponder ID code Step Check Yes No CHECK IMM ECM FUNCTION Insert the key to ignition switch LOCK posi tion measure changes in voltage between Antenna connector Connector amp terminal B142 No 1 No 2 Is the voltage 30 to 30 V Approximately 0 1 second after inserting the key Is the voltage 0 V Approximately 1 second after inserting the key Go to step 2 Replace IMM ECM
26. tion Wait 3 seconds before starting the engine For detailed operation procedure refer to the SUBARU SELECT MONITOR OPERATION MANUAL 2 WITHOUT SUBARU SELECT MONITOR Step Check Yes No CHECK STATUS OF CHECK ENGINE MAL FUNCTION INDICATOR LAMP MIL 1 Turn ignition switch to OFF 2 Set shift lever to neutral position MT vehi cles or set selector lever to P position AT vehicles 3 Connect test mode connector and read memory connector 4 Turn ignition switch to ON Does the MIL come on Go to step 2 Check the follow ing and repair if necessary NOTE Open or short circuit in engine control module power supply or ground line Open or short circuit in CHECK ENGINE malfunc tion indicator lamp CHECK DIAGNOSTIC TROUBLE CODE DTC 1 Set selector lever to N position and then set selector lever to P position again AT vehi cles only 2 Start the engine 3 Drive vehicle at speed greater than 11 km h 7 MPH for at least one minute 4 Warm up engine above 2 000 rpm Does the MIL indicate diagnos tic trouble code DTC lt Ref to IM 20 LIST List of Diagnos tic Trouble Code DTC gt IM 14 Record diagnostic trouble code Repair the trouble cause Turn ignition switch to OFF Disconnect read memory con nector and test mode connector Complete clear memory mode CLEAR MEMORY MODE IMMOBILIZER DIAGNOSTICS IM 15 DIAGNOSTICS CHART FOR I
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