Trouble Diagnosis

Rear window defogger does not activate.

SELF-DIAGNOSTIC RESULT CHECK
With CONSULT-II
- Select "BCM" on "SELECT SYSTEM" screen.
- Select "BCM" on "SELECT TEST ITEM" screen, and select "SELF-DIAG RESULTS".
- Check display content in self-diagnostic results.
  
  Fig 1: CONSULT-II Display Code Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
Contents displayed
- No malfunction: GO TO 2.
- Malfunction in CAN communication system: After printing the monitored items, go to "CAN System". Refer to "CAN COMMUNICATION ".
REAR DEFOGGER OPERATES INSPECTION BY ACTIVE TEST
With CONSULT-II
- Check operation with "REAR DEFOGGER" in the ACTIVE TEST. Refer to "ACTIVE TEST ".
  Does rear window defogger operate properly?
  
  Fig 2: CONSULT-II Diagnosis Function Display (1 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 3.
- NG: GO TO 5.
REAR WINDOW DEFOGGER SWITCH OPERATION INSPECTION BY DATA MONITOR
With CONSULT-II
- Check operation with "REAR DEF SW" in the DATA MONITOR". Refer to "DATA MONITOR ".
  Does rear window defogger switch operate properly?
  
  Fig 3: CONSULT-II Diagnosis Function Display (2 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
- NG: GO TO 4.
REAR WINDOW DEFOGGER SWITCH HARNESS CONTINUITY INSPECTION
Check continuity between BCM harness connector M18 terminal 9 and front air control harness connector M50 terminal 22 and between BCM connector terminal 9 and ground.

Fig 4: Continuity Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 5: Checking Continuity Between Terminal 9 And Terminal 22 And Terminal 9 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: Replace front air control.
- NG: Repair or replace harness.
REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT INSPECTION
- Turn the ignition switch ON.
- Check voltage between rear window defogger relay harness connector B4 terminal 1 and ground.
  
  Fig 6: Voltage Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 7: Checking Voltage Between Rear Window Defogger Relay Harness Connector B4 Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 6.
- NG: Repair or replace harness.
REAR WINDOW DEFOGGER RELAY INSPECTION
- Remove rear window defogger relay.
- Check continuity between terminals 3 and 5, 6 and 7.
  
  Fig 8: Continuity Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 9: Checking Continuity Between Terminals 3 And 5, 6 And 7
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 7.
- NG: Replace rear window defogger relay.
REAR WINDOW DEFOGGER FILAMENT CHECK
Check rear window defogger filament. Refer to "FILAMENT CHECK ".

OK or NG
- OK: GO TO 8.
- NG: Repair rear window defogger filament. Refer to "FILAMENT REPAIR ".
REAR WINDOW DEFOGGER GROUND HARNESS INSPECTION
Check continuity between rear window defogger connector B201 terminal - and body harness.

Fig 10: Continuity Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 11: Checking Continuity Between Rear Window Defogger Connector B201 Terminal - And Body Harness
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: GO TO 9.
- NG: Repair or replace harness.
REAR WINDOW DEFOGGER HARNESS INSPECTION
Check continuity between rear window defogger relay harness connector B4 terminal 5 and 7 and rear window defogger condenser, and between rear window defogger relay harness connector B4 terminal 5 and 7 and ground.

Fig 12: Continuity Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 13: Checking Continuity Between Terminal 5 And 7 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: GO TO 10.
- NG: Repair or replace harness.
IPDM E/R HARNESS INSPECTION
Check continuity between IPDM E/R harness connector E119 terminal 6 and 5 and rear window defogger relay connector B4 terminal 3 and 6, and IPDM E/R harness connector E119 terminal 6, 5 and body ground.

Fig 14: Continuity Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 15: Checking Continuity Between Terminal 3, 6, 5 And Body Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION OF IPDM E/R ".
- NG: Repair or replace harness.