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Home >> Infiniti >> 2016 >> Q50 Base, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Exterior Lighting System (DTC/Circuit Diagnosis) (Except Hybrid) >> DTC/Circuit Diagnosis >> Tail Lamp Circuit >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

  1. CHECK FUSE

    1. Turn ignition switch OFF.
    2. Check that the following fuses are not blown (open).
      Unit Location Fuse No. Capacity
      Tail lamp RH IPDM E/R #60 10 A
      Tail lamp LH #59

    Is the fuse blown (open)?

    YES 

    Replace the blown fuse after repairing the affected circuit if a fuse is blown (open).

    NO 

    GO TO STEP 2  .

  2. CHECK TAIL LAMP OUTPUT VOLTAGE

    G-20 With CONSULT

    1. Disconnect rear combination lamp (body side/trunk lid side) connector.
    2. Turn ignition switch ON.
    3. Select "EXTERNAL LAMPS" in "Active Test" mode of "IPDM E/R" using CONSULT.
    4. With operating the test items, check voltage between IPDM E/R harness connector and ground.
      + - Test item Voltage
      IPDM E/R
      Connector Terminal
      RH E126 90 Ground EXTERNAL LAMPS TAIL 9 - 16 V
      Off 0 - 1 V
      LH E120 17 TAIL 9 - 16 V
      Off 0 - 1 V

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Replace IPDM E/R. Refer to REMOVAL AND INSTALLATION .

  3. CHECK TAIL LAMP 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 combination lamp harness connector.
      BODY SIDE

      IPDM E/R Rear combination lamp (body side) Continuity
      Connector Terminal Connector Terminal
      RH E126 90 B23 2 Existed
      LH E120 17 B22
      TRUNK LID SIDE

      IPDM E/R Rear combination lamp (trunk lid side) Continuity
      Connector Terminal Connector Terminal
      RH E126 90 T52 3 Existed
      LH E120 17 T51

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair or replace harness.

  4. CHECK TAIL LAMP GROUND CIRCUIT

    Check continuity between rear combination lamp harness connector and ground.

    BODY SIDE

    Rear combination lamp (body side) - Continuity
    Connector Terminal
    RH B23 4 Ground Existed
    LH B22
    TRUNK LID SIDE

    Rear combination lamp (trunk lid side) - Continuity
    Connector Terminal
    RH T52 4 Ground Existed
    LH T51

    Is the inspection result normal?

    YES 

    Replace rear combination lamp. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace harness.