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LIN Communication System (Diagnostic Codes & Symptom Tests): Other Lexus GS IV

Communication Devices ~5240 words

PROCEDURE

  1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  2. CHECK FOR DTC (AIR CONDITIONING SYSTEM) Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600428-S10848817492014022400000) . OK Air conditioning system DTC is not output. NG --> See step 4 OK --> See step 3
  3. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)
  4. GO TO AIR CONDITIONING SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600428-S01987639112014022400000)
  1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  2. CHECK FOR DTC (SEAT HEATER SYSTEM) Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600426-S33425981552014022400000) . OK Seat heater system DTC is not output. NG --> See step 4 OK --> See step 3
  3. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)
  4. GO TO SEAT HEATER SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600426-S07698805752014022400000)
  1. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2287 is output. A DTC B2287 and B2785 are output simultaneously. B HINT: When DTC B2287 and B2785 are output simultaneously, perform troubleshooting for DTC B2785 first. B --> See step 6 A: Go to next step
  2. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU] - POWER MANAGEMENT CONTROL ECU) Disconnect the N95 certification ECU (smart key ECU assembly) connector. Disconnect the N92 power management control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N95-12 (LIN) - N92-11 (LIN2) Always Below 1 ohms N95-12 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. REPLACE POWER MANAGEMENT CONTROL ECU Replace the power management control ECU with a new or normally functioning one. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000) . NEXT: Go to next step
  4. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . OK DTC B2287 is not output. NG --> See step 5 OK --> END (POWER MANAGEMENT CONTROL ECU IS DEFECTIVE)
  5. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [03/2012 - ]»(ref-600642-S00554550882014022400000)
  6. GO TO DTC B2785. Refer to «DTC B2785: Communication Malfunction between ECUs Connected by LIN»(ref-600650-S19321650822014022400000)
  1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  2. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2322 is output A DTC B2322 is not output B B --> See step 12 A: Go to next step
  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH) Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000) . Disconnect the Q2 front power window regulator motor assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A-16 (LIN2) - Q2-9 (LIN) Always Below 1 ohms A-16 (LIN2) - Body ground Always 10 kohms or higher NG --> See step 9 OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (FRONT MULTIPLEX NETWORK DOOR ECU RH - BATTERY AND BODY GROUND) Disconnect the front multiplex network door ECU RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Q4-1 (GND) - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition Q4-6 (BDR) - Q4-1 (GND) Always 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Front Multiplex Network Door ECU LH) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (FRONT MULTIPLEX NETWORK DOOR ECU RH - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH) Disconnect the Q4 front multiplex network door ECU RH connector. Disconnect the Q2 front power window regulator motor assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Q4-5 (BDRJ) - Q2-2 (B) Always Below 1 ohms Q4-2 (PWE) - Q2-1 (E) Always Below 1 ohms Q4-2 (PWE) - Body ground Always 10 kohms or higher Q4-5 (BDRJ) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  6. CHECK FRONT MULTIPLEX NETWORK DOOR ECU RH Disconnect the front power window regulator motor assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Q2-1 (E) - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition Q2-2 (B) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Front Power Window Regulator Motor Assembly RH) NG --> See step 16 OK: Go to next step
  7. REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Temporarily replace the front power window regulator motor assembly RH with a new or normally functioning one. Refer to «REMOVAL [03/2012 - ]»(ref-600673-S23573581472014022400000) . NEXT: Go to next step
  8. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . OK DTC B2321 is not output. NG --> See step 13 OK --> END (FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH IS DEFECTIVE)
  9. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - FRONT MULTIPLEX NETWORK DOOR ECU RH) Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000) . Disconnect the Q3 front multiplex network door ECU RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A-16 (LIN2) - Q3-18 (LIN1) Always Below 1 ohms A-16 (LIN2) - Body ground Always 10 kohms or higher NG --> See step 11 OK: Go to next step
  10. CHECK HARNESS AND CONNECTOR (FRONT MULTIPLEX NETWORK DOOR ECU RH - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH) Disconnect the Q3 front multiplex network door ECU RH connector. Disconnect the Q2 front power window regulator motor assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Q3-9 (LIN3) - Q2-9 (LIN) Always Below 1 ohms Q3-9 (LIN3) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 14
  11. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - FRONT MULTIPLEX NETWORK DOOR ECU RH) Disconnect the 5A cowl side junction block LH connector. Disconnect the Q3 front multiplex network door ECU RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 5A-56 - Q3-18 (LIN1) Always Below 1 ohms 5A-56 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 15
  12. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)
  13. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000)
  14. REPLACE FRONT MULTIPLEX NETWORK DOOR ECU RH. Refer to «DISASSEMBLY [03/2012 - ]»(ref-600591-S42206612232014022400000)
  15. REPLACE COWL SIDE JUNCTION BLOCK LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000)
  16. REPLACE FRONT MULTIPLEX NETWORK DOOR ECU RH. Refer to «DISASSEMBLY [03/2012 - ]»(ref-600591-S42206612232014022400000)
  1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  2. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2323 is output A DTC B2323 is not output B B --> See step 8 A: Go to next step
  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH) Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000) . Disconnect the R1 rear power window regulator motor assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A-16 (LIN2) - R1-9 (LIN) Always Below 1 ohms A-16 (LIN2) - Body ground Always 10 kohms or higher NG --> See step 7 OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH - BATTERY AND BODY GROUND) Disconnect the rear power window regulator motor assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition R1-1 (E) - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition R1-2 (B) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Rear Power Window Regulator Motor Assembly RH) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Temporarily replace the rear power window regulator motor RH with a new or normally functioning one. Refer to «REMOVAL [03/2012 - ]»(ref-600673-S38114263982014022400000) . NEXT: Go to next step
  6. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . OK DTC B2323 is not output. NG --> See step 9 OK --> END (REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH IS DEFECTIVE)
  7. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH) Disconnect the 5A cowl side junction block LH connector. Disconnect the R1 rear power window regulator motor assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 5A-56 - R1-9 (LIN) Always Below 1 ohms 5A-56 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 10
  8. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)
  9. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000)
  10. REPLACE COWL SIDE JUNCTION BLOCK LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000)
  1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  2. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2325 is output A DTC B2325 is not output B B --> See step 30 A: Go to next step
  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY) Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000) . Disconnect the Q25 multiplex network master switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A-16 (LIN2) - Q25-17 (LIN1) Always Below 1 ohms Q25-17 (LIN1) - Body ground Always 10 kohms or higher NG --> See step 21 OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH) Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000) . Disconnect the Q17 front power window regulator motor assembly LH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A-16 (LIN2) - Q17-9 (LIN) Always Below 1 ohms Q17-9 (LIN) - Body ground Always 10 kohms or higher NG --> See step 23 OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH) Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000) . Disconnect the R1 rear power window regulator motor assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A-16 (LIN2) - R1-9 (LIN) Always Below 1 ohms R1-9 (LIN) - Body ground Always 10 kohms or higher NG --> See step 25 OK: Go to next step
  6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH) Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000) . Disconnect the Q2 front power window regulator motor assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A-16 (LIN2) - Q2-9 (LIN) Always Below 1 ohms Q2-9 (LIN) - Body ground Always 10 kohms or higher NG --> See step 26 OK: Go to next step
  7. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH) Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000) . Disconnect the R9 rear power window regulator motor assembly LH connector. Standard Resistance Tester Connection Condition Specified Condition A-16 (LIN2) - R9-9 (LIN) Always Below 1 ohms R9-9 (LIN) - Body ground Always 10 kohms or higher RESULT Result Proceed to OK (w/ Sliding Roof System) A OK (w/o Sliding Roof System) B NG C B --> See step 9 C --> See step 28 A: Go to next step
  8. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - SLIDING ROOF DRIVE GEAR ASSEMBLY) Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000) . Disconnect the Y4 sliding roof drive gear sub-assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A-16 (LIN2) - Y4-11 (LIN) Always Below 1 ohms Y4-11 (LIN) - Body ground Always 10 kohms or higher NG --> See step 29 OK: Go to next step
  9. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  10. CHECK FOR DTC Disconnect the Q25 multiplex network master switch assembly connector. Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2325 is output A DTC B2325 is not output B B --> See step 32 A: Go to next step
  11. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  12. CHECK FOR DTC Disconnect the Q17 front power window regulator motor assembly LH connector. Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2325 is output A DTC B2325 is not output B B --> See step 33 A: Go to next step
  13. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  14. CHECK FOR DTC Disconnect the Q2 front power window regulator motor assembly RH connector. Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2325 is output A DTC B2325 is output B B --> See step 34 A: Go to next step
  15. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  16. CHECK FOR DTC Disconnect the R1 rear power window regulator motor assembly RH connector. Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2325 is output A DTC B2325 is not output B B --> See step 35 A: Go to next step
  17. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  18. CHECK FOR DTC Disconnect the R9 rear power window regulator motor assembly LH connector. Recheck for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2325 is output (w/ Sliding Roof System) A DTC B2325 is output (w/o Sliding Roof System) B DTC B2325 is not output C B --> See step 47 C --> See step 36 A: Go to next step
  19. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  20. CHECK FOR DTC Disconnect the Y4 sliding roof drive gear sub-assembly connector. Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2325 is output A DTC B2325 is not output B B --> See step 37 A --> See step 31
  21. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY) Disconnect the 5C cowl side junction block LH connector. Disconnect the Q25 multiplex network master switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 5C-28 - Q25-17 (LIN1) Always Below 1 ohms Q25-17 (LIN1) - Body ground Always 10 kohms or higher NG --> See step 22 OK --> See step 38
  22. CHECK HARNESS AND CONNECTOR (FRONT MULTIPLEX NETWORK DOOR ECU LH - COWL SIDE JUNCTION BLOCK LH OR MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY) Disconnect the Q18 front multiplex network door ECU LH connector. Disconnect the 5C cowl side junction block LH connector. Disconnect the Q25 multiplex network master switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Q18-18 (LIN1) - 5C-28 Always Below 1 ohms Q18-8 (LIN2) - Q25-17 (LIN1) Always Below 1 ohms Q18-18 (LIN1) - Body ground Always 10 kohms or higher Q18-8 (LIN2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 39
  23. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH) Disconnect the 5C cowl side junction block LH connector. Disconnect the Q17 front power window regulator motor assembly LH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 5C-28 - Q17-9 (LIN) Always Below 1 ohms Q17-9 (LIN) - Body ground Always 10 kohms or higher NG --> See step 24 OK --> See step 40
  24. HARNESS AND CONNECTOR (FRONT MULTIPLEX NETWORK DOOR ECU LH - COWL SIDE JUNCTION BLOCK LH OR FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH) Disconnect the Q18 front multiplex network door ECU LH connector. Disconnect the 5C cowl side junction block LH connector. Disconnect the Q17 front power window regulator motor assembly LH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 5C-28 - Q18-18 (LIN1) Always Below 1 ohms Q18-9 (LIN3) - Q17-9 (LIN) Always Below 1 ohms Q18-18 (LIN1) - Body ground Always 10 kohms or higher Q17-9 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 41
  25. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH) Disconnect the 5A cowl side junction block LH connector. Disconnect the R1 rear power window regulator motor assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 5A-56 - R1-9 (LIN) Always Below 1 ohms R1-9 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 42
  26. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH) Disconnect the 5A cowl side junction block LH connector. Disconnect the Q2 front power window regulator motor assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 5A-56 - Q2-9 (LIN) Always Below 1 ohms Q2-9 (LIN) - Body ground Always 10 kohms or higher NG --> See step 27 OK --> See step 43
  27. HARNESS AND CONNECTOR (FRONT MULTIPLEX NETWORK DOOR ECU RH - COWL SIDE JUNCTION BLOCK LH OR FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH) Disconnect the Q3 front multiplex network door ECU RH connector. Disconnect the 5A cowl side junction block LH connector. Disconnect the Q2 front power window regulator motor assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Q3-18 (LIN1) - 5A-56 Always Below 1 ohms Q3-9 (LIN3) - Q2-9 (LIN) Always Below 1 ohms Q3-18 (LIN1) - Body ground Always 10 kohms or higher Q2-9 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 44
  28. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH) Disconnect the 5C cowl side junction block LH connector. Disconnect the R9 rear power window regulator motor assembly LH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 5C-29 - R9-9 (LIN) Always Below 1 ohms R9-9 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 45
  29. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) Disconnect the 5A cowl side junction block LH connector. Disconnect the Y4 sliding roof drive gear sub-assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 5A-50 - Y4-11 (LIN) Always Below 1 ohms Y4-11 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 46
  30. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)
  31. REPLACE MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU]. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000)
  32. REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY. Refer to «REMOVAL [03/2012 - ]»(ref-600673-S08550416372014022400000)
  33. REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH. Refer to «REMOVAL [03/2012 - ]»(ref-600673-S23573581472014022400000)
  34. REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH. Refer to «REMOVAL [03/2012 - ]»(ref-600673-S23573581472014022400000)
  35. REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH. Refer to «REMOVAL [03/2012 - ]»(ref-600673-S38114263982014022400000)
  36. REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH. Refer to «REMOVAL [03/2012 - ]»(ref-600673-S38114263982014022400000)
  37. REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY. Refer to «DISASSEMBLY [03/2012 - ]»(ref-600674-S34028953582014022400000)
  38. REPLACE COWL SIDE JUNCTION BLOCK LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000)
  39. REPLACE FRONT MULTIPLEX NETWORK DOOR ECU LH. Refer to «DISASSEMBLY [03/2012 - ]»(ref-600591-S42206612232014022400000)
  40. REPLACE COWL SIDE JUNCTION BLOCK LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000)
  41. REPLACE FRONT MULTIPLEX NETWORK DOOR ECU LH. Refer to «DISASSEMBLY [03/2012 - ]»(ref-600591-S42206612232014022400000)
  42. REPLACE COWL SIDE JUNCTION BLOCK LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000)
  43. REPLACE COWL SIDE JUNCTION BLOCK LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000)
  44. REPLACE FRONT MULTIPLEX NETWORK DOOR ECU LH. Refer to «DISASSEMBLY [03/2012 - ]»(ref-600591-S42206612232014022400000)
  45. REPLACE COWL SIDE JUNCTION BLOCK LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000)
  46. REPLACE COWL SIDE JUNCTION BLOCK LH. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000)
  47. REPLACE MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU]. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000)
  1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  2. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2785 is output A DTC B2785 is not output B B --> See step 10 A: Go to next step
  3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - ID CODE BOX [IMMOBILIZER CODE ECU] - POWER MANAGEMENT CONTROL ECU OR STEERING LOCK ACTUATOR ASSEMBLY) Disconnect the N95 certification ECU (smart key ECU assembly) connector. Disconnect the N73 ID code box (immobilizer code ECU) connector. Disconnect the N92 power management control ECU connector. Disconnect the N24 steering lock actuator assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N95-12 (LIN) - N24-5 (LIN) Always Below 1 ohms N95-12 (LIN) - N92-11 (LIN2) Always Below 1 ohms N95-12 (LIN) - N73-2 (LIN1) Always Below 1 ohms N95-12 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CLEAR DTC Disconnect the N24 steering lock actuator assembly connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  5. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2785 is output A DTC B2785 is not output B B --> See step 12 A: Go to next step
  6. CLEAR DTC Disconnect the N73 ID code box (immobilizer code ECU) connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  7. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2785 is output A DTC B2785 is not output B B --> See step 13 A: Go to next step
  8. CLEAR DTC Disconnect the N92 power management control ECU connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  9. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2785 is output A DTC B2785 is not output B B --> See step 14 A --> See step 11
  10. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)
  11. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [03/2012 - ]»(ref-600642-S00554550882014022400000)
  12. REPLACE STEERING LOCK ACTUATOR ASSEMBLY. Refer to «DISASSEMBLY [03/2012 - ]»(ref-600607-S17635330842014022400000)
  13. REPLACE ID CODE BOX (IMMOBILIZER CODE ECU). Refer to «REMOVAL [03/2012 - ]»(ref-600642-S19370879682014022400000)
  14. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000)
  1. CLEAR DTC Clear the DTC. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  2. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B2789 is output A DTC B2789 is not output B B --> See step 7 A: Go to next step
  3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - ID CODE BOX [IMMOBILIZER CODE ECU]) Disconnect the N95 certification ECU (smart key ECU assembly) connector. Disconnect the N73 ID code box (immobilizer code ECU) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N95-12 (LIN) - N73-2 (LIN1) Always Below 1 ohms N95-12 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (ID CODE BOX [IMMOBILIZER CODE ECU] - BATTERY AND BODY GROUND) Disconnect the ID code box (immobilizer code ECU) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N73-5 (GND) - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition N73-1 (+B) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to ID Code Box [Immobilizer Code ECU]) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Temporarily replace the certification ECU (smart key ECU assembly) with a new one. Refer to «REMOVAL [03/2012 - ]»(ref-600642-S00554550882014022400000) . NEXT: Go to next step
  6. CHECK FOR DTC Clear the DTC. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . OK DTC B2789 is not output. NG --> See step 8 OK --> END (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] IS DEFECTIVE)
  7. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)
  8. REPLACE ID CODE BOX (IMMOBILIZER CODE ECU). Refer to «REMOVAL [03/2012 - ]»(ref-600642-S19370879682014022400000)
  1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  2. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . RESULT Result Proceed to DTC B278C is output A DTC B278C is not output B B --> See step 9 A: Go to next step
  3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU] - POWER MANAGEMENT CONTROL ECU) Disconnect the N95 certification ECU (smart key ECU assembly) connector. Disconnect the N92 power management control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N95-12 (LIN) - N92-11 (LIN2) Always Below 1 ohms N95-12 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY AND BODY GROUND) Disconnect the power management control ECU connectors. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition N91-1 (AM22) - Body ground Always 11 to 14 V N92-7 (AM21) - Body ground Always 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N91-6 (E1) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Power Management Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. REPLACE POWER MANAGEMENT CONTROL ECU Replace the power management control ECU with a new or normally functioning one. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000) . NEXT: Go to next step
  6. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . NEXT: Go to next step
  7. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600622-S02267081232014022400000) . OK DTC B278C is not output. NG --> See step 8 OK --> END (POWER MANAGEMENT CONTROL ECU IS DEFECTIVE)
  8. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [03/2012 - ]»(ref-600642-S00554550882014022400000)
  9. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)

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