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Home >> Nissan-Datsun >> 2019 >> Altima Edition ONE >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Exterior Lighting System - Halogen Headlamp (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> DTC B20D4-11: Tail Lamp LH PWR SPLY CIRC >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK TAIL LAMP POWER SUPPLY CIRCUIT 
    1. Ignition switch ON.
    2. Turn the parking lamps ON.
    3. Check voltage between rear combination lamp LH (body side) or rear combination lamp LH (trunk lid side) and ground.

    +

    --

    Voltage

    (Approx.)

    Rear combination lamp

    Ground

    Battery voltage

    Connector

    Terminal

    LH (body side)

    B30

    1

    LH (trunk lid side)

    B31

    7

    Is the inspection result normal?

    YES

    Refer to Inspection .

    NO

    GO TO 2.

  2. CHECK TAIL LAMP SHORT CIRCUIT TO GROUND 
    1. Ignition switch OFF.
    2. Disconnect rear combination lamp LH (body side) connector, rear combination lamp LH (trunk lid side) connector and IPDM E/R connector.
    3. Check continuity between IPDM E/R harness connector and ground.

    IPDM E/R

    Ground

    Continuity

    Connector

    Terminal

    E17

    4

    No

    Is the inspection result normal?

    YES

    Replace IPDM E/R. Refer to IPDM E/R : Removal & Installation .

    NO

    Repair or replace harness.