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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Exterior Lighting System (DTC/Circuit Diagnosis) (Except Hybrid) >> DTC/Circuit Diagnosis >> Tail Lamp Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE 
    1. Turn ignition switch OFF.
    2. Check that the following fuse is not blown (open).

      Unit

      Location

      Fuse No.

      Capacity

      Parking lamp RH

      IPDM E/R

      #52

      10 A

      Parking lamp LH

      Front side marker lamp RH

      Front side marker lamp LH

      Tail lamp RH (Body side)

      Rear side marker lamp RH

      Tail lamp RH (Trunk lid side)

      Tail lamp LH (Trunk lid side)

      License plate lamp RH

      License plate lamp LH

      Tail lamp LH (Body side)

      #53

      Rear side marker lamp LH

    Is the fuse blown (open)?

    YES

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

    NO

    GO TO 2.

  2. CHECK TAIL LAMP POWER SUPPLY 

    SYMBOL With CONSULT

    1. Turn ignition switch ON.
    2. Select "EXTERNAL LAMPS" in "Active Test" mode of "IPDM E/R" using CONSULT.
    3. With operating the test items, check voltage between IPDM E/R harness connector and ground.
      Tail lamp (Body side)

      +

      -

      Test item

      Voltage

      IPDM E/R

      Connector

      Terminal

      RH

      E9

      102

      Ground

      EXTERNAL LAMPS

      TAIL

      9 - 16 V

      Off

      0 - 1 V

      LH

      E7

      55

      TAIL

      9 - 16 V

      Off

      0 - 1 V

      Tail Lamp (Trunk Lid Side)

      +

      -

      Test item

      Voltage

      IPDM E/R

      Connector

      Terminal

      E9

      102

      Ground

      EXTERNAL LAMPS

      TAIL

      9 - 16 V

      Off

      0 - 1 V

    Is the inspection result normal?

    YES

    GO TO 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 and rear combination lamp connector.
    3. Check continuity between IPDM E/R harness connector and rear combination lamp harness connector.
      Tail lamp (Body side)

      IPDM E/R

      Rear combination lamp (Body side)

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      RH

      E9

      102

      B260

      1

      Existed

      LH

      E7

      55

      B26

      Tail Lamp (Trunk Lid Side)

      IPDM E/R

      Rear combination lamp (Trunk lid side)

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      RH

      E9

      102

      T15

      3

      Existed

      LH

      T16

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace harness.

  4. CHECK TAIL LAMP GROUND CIRCUIT 

    Check continuity between rear combination lamp harness connector and ground.

    Tail lamp (Body side)

    Rear combination lamp (Body side)

    --

    Continuity

    Connector

    Terminal

    RH

    B260

    4

    Ground

    Existed

    LH

    B26

    Tail Lamp (Trunk Lid Side)

    Rear combination lamp (Trunk lid side)

    --

    Continuity

    Connector

    Terminal

    RH

    T15

    4

    Ground

    Existed

    LH

    T16

    Is the inspection result normal?

    YES

    Replace the corresponding rear combination lamp. Refer to Removal and Installation (body side) or Removal and Installation (trunk lid side).

    NO

    Repair or replace harness.