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Home >> Infiniti >> 2011 >> M37 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 35 (Defogger System) >> DTC/Circuit Diagnosis >> Rear Window Defogger >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect rear window defogger connector.
    3. Turn ignition switch ON.
    4. Check voltage between rear window defogger harness connector and ground.
      VOLTAGE SPECIFICATION

      (+) (-) Condition Voltage (V) (Approx.)
      Rear window defogger
      Connector Terminal
      D103 1 Ground Rear window defogger switch ON Battery voltage
      OFF 0

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: GO TO  4.

  2. CHECK REAR WINDOW DEFOGGER GROUND CIRCUIT
    1. Turn ignition switch OFF.
    2. Check continuity between rear window defogger harness connector and ground.
      CONTINUITY SPECIFICATION

      Rear window defogger Ground Continuity
      Connector Terminal
      D104 2 Existed

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair or replace harness.

  3. CHECK FILAMENT

    Refer to "INSPECTION AND REPAIR ".

    Is the inspection result normal? 

    YES: GO TO  5.

    NO: Repair filament.

  4. CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R connector.
    3. Check continuity between IPDM E/R harness connector and rear window defogger harness connector.
      CONTINUITY SPECIFICATION

      IPDM E/R Rear window defogger Continuity
      Connector Terminal Connector Terminal
      E11 14 D103 1 Existed
    4. Check continuity between IPDM E/R connector and ground.
      CONTINUITY SPECIFICATION

      IPDM E/R Ground Continuity
      Connector Terminal
      E11 14 Not existed

      Is the inspection result normal? 

      YES: GO TO 5.

      NO: Repair or replace harness.

  5. CHECK INTERMITTENT INCIDENT

    Check intermittent incident.

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END