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Home >> Infiniti >> 2017 >> QX80 Limited >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Interior Lighting System >> DTC/Circuit Diagnosis >> Side Step Illumination Control Circuit >> Diagnosis Procedure

Diagnosis Procedure

NOTE:

Before performing the diagnosis, check that the puddle lamp circuit is normal.

  1. CHECK SIDE STEP ILLUMINATION CONTROL OUTPUT SIGNAL

    1. Turn ignition switch OFF.
    2. Disconnect BCM and door mirror (driver side and passenger side) connector.
    3. Check continuity between BCM harness connector.
    (+) (-) Voltage
    (Approx.)
    BCM
    Connector Terminal
    M71 72 Ground 12 V

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    GO TO STEP 2  .

  2. CHECK SIDE STEP ILLUMINATION CONTROL SIGNAL CIRCUIT

    1. Disconnect side step illumination control unit connector.
    2. Check continuity between side step illumination control unit harness connector and BCM harness connector.
      Side step illumination control unit BCM Continuity
      Connector Terminal Connector Terminal
      E251 6 M71 72 Existed
    3. Check continuity between BCM harness connector and ground.
      BCM Ground Continuity
      Connector Terminal
      M71 72 Not existed

    Is the inspection result normal?

    YES 

    Replace side step illumination control unit.

    NO 

    Repair or replace harnesses.

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