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Trouble Diagnosis

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Rear window defogger does not activate.

  1. SELF-DIAGNOSTIC RESULT CHECK 

    With CONSULT-II

    • Select "BCM" on "SELECT SYSTEM" screen.
    • Select "BCM C/U" on "SELECT TEST ITEM" screen, and select "SELF-DIAG RESULTS".
    • Check display content in self-diagnostic results.
      Fig 1: Self-Diagnostic Result Check Table
      G02162199Courtesy of NISSAN MOTOR CO., U.S.A.

    Contents displayed 

    1. No malfunction : GO TO  3 .
    2. Malfunction in CAN communication system : GO TO 2.
  2. SYMPTOM CHECK 

    With CONSULT-II

    • Select "CAN DIAG SUPPORT MNTR" in "DATA MONITOR".
    • Select "START" and check display content.
      Fig 2: Symptom Check Table (With Consult-II)
      G02162200Courtesy of NISSAN MOTOR CO., U.S.A.
    1. : After printing the monitored items, go to "CAN System". Refer to, "CAN COMMUNICATION ".
  3. REAR DEFOGGER OPERATES INSPECTION BY ACTIVE TEST 

    With CONSULT-II

    • Using "REAR DEFOGGER" in the ACTIVE TEST. Refer to , "ACTIVE TEST  ".

    Dose rear window defogger operate normally?

    Fig 3: Displaying Active Test Mode
    G02162201Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO 4.
    2. NG: GO TO  6 .
  4. REAR WINDOW DEFOGGER SWITCH OPERATION INSPECTION BY DATA MONITOR 

    With CONSULT-II

    • Using "REAR DEF SW" in the DATA MONITOR". Refer to , "DATA MONITOR  ".

    Dose rear window defogger switch operate properly?

    Fig 4: Displaying Select Monitor Item Mode
    G02162202Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: Replace BCM.
    2. NG: GO TO 5.
  5. REAR WINDOW DEFOGGER SWITCH HARNESS CONTINUITY INSPECTION 

    Check continuity between BCM harness connector M18 terminal 69 (GY) and rear window defogger switch I harness connector M50 (with auto A/C) terminal 31 (GY) or M42 (with manual A/C) terminal 1 (GY), and | between BCM connector M18 terminal 69 (GY) and body ground.

    Fig 5: Inspecting Rear Window Defogger Switch Harness (1 Of 2)
    G02162203Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 6: Inspecting Rear Window Defogger Switch Harness (2 Of 2)
    G02162204Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: Replace rear window defogger switch.
    2. NG: Repair or replace harness.
  6. REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT INSPECTION 
    • Turn the ignition switch OFF.
    • Check voltage between rear window defogger relay harness __connector B4 terminal 1 (G) and body ground.
      Fig 7: Inspecting Rear Window Defogger Relay Power Supply Circuit (1 Of 2)
      G02162205Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 8: Inspecting Rear Window Defogger Relay Power Supply Circuit (2 Of 2)
      G02162206Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO 7.
    2. NG: Repair or replace harness.
  7. REAR WINDOW DEFOGGER RELAY INSPECTION 
    • Remove rear window defogger relay.
    • Check continuity between terminals 3 and 5, 6 and 7.
      Fig 9: Inspecting Rear Window Defogger Relay (1 Of 2)
      G02162207Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 10: Inspecting Rear Window Defogger Relay (2 Of 2)
      G02162208Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO 8.
    2. NG: Replace rear window defogger relay.
  8. REAR WINDOW DEFOGGER FILAMENT CHECK 

    Check rear window defogger filament. Refer to , "FILAMENT CHECK  ".

    OK or NG 

    1. OK: GO TO 9.
    2. NG: Repair rear window defogger filament. Refer to , "FILAMENT REPAIR  ".
  9. REAR WINDOW DEFOGGER GROUND HARNESS INSPECTION 

    Check continuity between rear window defogger connector B201 terminal - (B) and body harness.

    Fig 11: Inspecting Rear Window Defogger Ground Harness (1 Of 2)
    G02162209Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 12: Inspecting Rear Window Defogger Ground Harness (2 Of 2)
    G02162210Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO 10.
    2. NG: Repair or replace harness.
  10. REAR WINDOW DEFOGGER HARNESS INSPECTION 

    Check continuity between rear window defogger relay harness connector B4 terminal 5 (R) and 7 (R) and rear window defogger condenser, and between rear window defogger relay harness connector B4 terminal 5 (R) and 7 (R) and ground.

    Fig 13: Inspecting Rear Window Defogger Harness (1 Of 2)
    G02162211Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 14: Inspecting Rear Window Defogger Harness (2 Of 2)
    G02162212Courtesy of NISSAN MOTOR CO., U.S.A.
    1. OK: GO TO 11.
    2. NG: Repair or replace harness.
  11. IPDM E/R HARNESS INSPECTION 

    Check continuity between IPDM E/R harness connector E118 and E119 terminal 3 (L) and 8 (W) and rear window defogger relay connector B4 terminal 3 (L) and 6 (W), and IPDM E/R harness connector E118, E119 terminal 3 (L), 8 (W) and body ground.

    Fig 15: Inspecting IPDM E/R Harness (1 Of 2)
    G02162213Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 16: Inspecting IPDM E/R Harness (2 Of 2)
    G02162214Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: Replace IPDM E/R.
    2. NG: Repair or replace harness.
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