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Home › Nissan-Datsun › 2004 › Sentra SE-R › Repair and Diagnosis › External Pages › Different car › Section 673 (Rear Window Defogger - Sedan) › Rear Window Defogger › Rear Window Defogger Circuit Check

Rear Window Defogger Circuit Check

WARNING: This page is about a different car, the 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT 1
    1. Turn ignition switch OFF.
    2. Disconnect rear window defogger connector.
    3. Turn ignition switch ON.
    4. Check voltage between rear window defogger connector and ground.
    Fig 1: Rear Window Defogger Connector And Ground Voltage Table
    G02158277Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: Checking Voltage Between Rear Window Defogger Connector And Ground
    G02158278Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : GO TO 2.
    2. NG : GO TO  3 .
  2. CHECK REAR WINDOW DEFOGGER GROUND CIRCUIT
    1. Turn ignition switch OFF.
    2. Check continuity between rear window defogger connector B241 terminal 1 and grounds.
      1. 1 (B) - Ground: Continuity should exist 

    OK or NG 

    1. OK : Check filament, Refer to "FILAMENT CHECK  "
      • If filament is OK.

        Check the condition of the harness and the connector.

      • If filament is NG.

        Repair filament.

    2. NG : Repair or replace harness between rear window defogger and ground.
    Fig 3: Checking Continuity Between Rear Window Defogger Connector And Ground
    G02158279Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK REAR WINDOW DEFOGGER POWER WINDOW SUPPLY CIRCUIT 2
    1. Turn ignition switch OFF.
    2. Disconnect condenser connector.
    3. Turn ignition switch ON.
    4. Check voltage between condenser connector and ground.
    Fig 4: Condenser Connector And Ground Voltage Table
    G02158280Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 5: Checking Voltage Between Condenser Connector And Ground
    G02158281Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : Repair or replace harness between condenser and rear window defogger.
    2. NG : GO TO 4.
  4. CHECK CONDENSER HARNESS
    1. Turn ignition switch OFF.
    2. Disconnect rear window defogger relay.
    3. Check continuity between rear window defogger relay connector B109 terminal 5 and condenser connector B34 terminal 1.
      1. 5 (B/W) - 1 (L): Continuity should exist. 

    OK or NG 

    1. OK : Check the condition of the harness and the connector.
    2. NG : Repair or replace harness rear window defogger relay and condenser.
    Fig 6: Checking Continuity Between Rear Window Defogger Relay Connector And Condenser Connector
    G02158282Courtesy of NISSAN MOTOR CO., U.S.A.
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