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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Interior Lighting System (Circuit Diagnosis) (Except Hybrid) >> Circuit Diagnosis >> Interior Room Lamp Control Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK INTERIOR ROOM LAMP CONTROL OUTPUT 

    SYMBOL CONSULT ACTIVE TEST

    1. Turn ignition switch OFF.
    2. Remove all the bulbs of map lamp, foot lamp, front kicking plate lamp, and personal lamp.
    3. Turn ignition switch ON.
    4. Select "INT LAMP" of BCM (INT LAMP) active test item.
    5. With operating the test item, check continuity between BCM harness connector and ground.

    BCM

    Ground

    Test item

    Continuity

    Connector

    Terminal

    M122

    63

    INT LAMP

    On

    Existed

    Off

    Not existed

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    Continuity exists and remains unchanged: GO TO 3.

    NO

    Continuity does not exist and remains unchanged: Replace BCM. Refer to Removal and Installation .

  2. CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect BCM connector, map lamp connector, foot lamp connector, front kicking plate lamp connector and personal lamp connector.
    3. Check continuity between BCM harness connector and foot lamp harness connector.

      BCM

      Foot lamp

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M122

      63

      Driver side

      M186

      2

      Existed

      Passenger side

      M114

    4. Check continuity between BCM harness connector and front kicking plate lamp harness connector.

      BCM

      Front kicking plate lamp

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M122

      63

      Driver side

      B601

      2

      Existed

      Passenger side

      B603

    5. Check continuity between BCM harness connector and map lamp harness connector.

      BCM

      Map lamp

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M122

      63

      R15

      2

      Existed

    6. Check continuity between personal lamp harness connector and map lamp harness connector.

      Personal lamp

      Map lamp

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      R14

      3

      R15

      4

      Existed

    Is the inspection result normal?

    YES

    Replace map lamp, personal lamp or foot lamp.

    NO

    Repair or replace harnesses.

  3. CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect BCM connector, map lamp connector, foot lamp connector, front kicking plate lamp connector and personal lamp connector.
    3. Check continuity between BCM harness connector and ground.

    BCM

    Ground

    Continuity

    Connector

    Terminal

    M122

    63

    Not existed

    Is the inspection result normal?

    YES

    Replace BCM. Refer to Removal and Installation .

    NO

    Repair or replace harnesses.