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Home >> Infiniti >> 2011 >> G37 IPL, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Exterior Lighting System -- G37 Coupe >> DTC/Circuit Diagnosis >> Front Fog Lamp Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FRONT FOG LAMP FUSE
    1. Turn the ignition switch OFF.
    2. Check that the following fuses are not fusing.
      FUSE REFERENCE CHART

      Unit Location Fuse No. Capacity
      Front fog lamp IPDM E/R #58 15 A

      Is the fuse fusing? 

      YES: GO TO 2.

      NO: GO TO  3.

  2. CHECK FRONT FOG LAMP SHORT CIRCUIT
    1. Disconnect IPDM E/R connector and the front combination lamp connector.
    2. Check continuity between the IPDM E/R harness connector and the ground.
      CONTINUITY REFERENCE CHART

      IPDM E/R Ground Continuity
      Connector Terminal
      RH E8 86 Not existed
      LH 87

      Does continuity exist? 

      YES: Repair the harnesses or connectors. And then replace the fuse.

      NO: Replace the fuse. (Replace IPDM E/R if the fuse is fusing again.)

  3. CHECK FRONT FOG LAMP BULB

    Check the applicable lamp bulb.

    Is the bulb normal? 

    YES: GO TO 4.

    NO: Replace the bulb.

  4. CHECK FRONT FOG LAMP OUTPUT VOLTAGE

    CONSULT-III ACTIVE TEST

    1. Disconnect the front combination lamp connector.
    2. Turn the ignition switch ON.
    3. Select "EXTERNAL LAMPS" of IPDM E/R active test item.
    4. With operating the test items, check the voltage between the IPDM E/R harness connector and the ground.
      VOLTAGE REFERENCE CHART

      Terminals Test item Voltage (Approx.)
      (+) (-)
      IPDM E/R Ground EXTERNAL LAMPS
      Connector Terminal
      RH E8 86 Fog Battery voltage
      Off 0 V
      LH 87 Fog Battery voltage
      Off 0 V

      Is the measurement value normal? 

      YES: GO TO 5.

      NO: Replace IPDM E/R.

  5. CHECK FRONT FOG LAMP OPEN CIRCUIT
    1. Turn the ignition switch OFF.
    2. Disconnect IPDM E/R connector.
    3. Check continuity between the IPDM E/R harness connector and the front fog lamp harness connector.
      CONTINUITY REFERENCE CHART

      IPDM E/R Front fog lamp Continuity
      Connector Terminal Connector Terminal
      RH E8 86 E29 1 Existed
      LH 87 E59 1

      Does continuity exist? 

      YES: GO TO 6.

      NO: Repair the harnesses or connectors.

  6. CHECK FRONT FOG LAMP GROUND CIRCUIT OPEN CIRCUIT

    Check continuity between the front fog lamp harness connector and the ground.

    CONTINUITY REFERENCE CHART

    Front fog lamp Ground Continuity
    Connector Terminal
    RH E29 2 Existed
    LH E59 2

    Does continuity exist? 

    YES: Refer to "INTERMITTENT INCIDENT ".

    NO: Repair the harnesses or connectors.