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Home >> Infiniti >> 2017 >> QX30 Base >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Exterior Lighting System (Led Headlamp) (DTCS) (2 Of 2) >> DTC/Circuit Diagnosis >> DTC B2800: Stop Lamp LH Circuit >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

  1. CHECK STOP LAMP LH SIGNAL CIRCUIT 1

    1. Turn ignition switch OFF.
    2. Disconnect BCM and rear combination lamp LH (body side) connector.
    3. Check continuity between BCM harness connector and ground.
      BCM Ground Continuity
      Connector Terminal
      M27 57 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair or replace harness.

  2. CHECK STOP LAMP LH SIGNAL CIRCUIT 2

    1. Check continuity between BCM harness connector and rear combination lamp LH (body side) harness connector.
      BCM Rear combination lamp LH (body side) Continuity
      Connector Terminal Connector Terminal
      M27 57 M194 2 Existed
    2. Check voltage between BCM harness connector and ground.
      (+) (-) Voltage
      (Approx.)
      BCM
      Connector Terminal
      M27 57 Ground 0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair or replace harness.

  3. ERASE DTC

    1. Connect BCM and rear combination lamp LH (body side) connector.
    2. Turn ignition switch ON.
    3. Select "Self Diagnostic Result" mode of "BCM" using CONSULT.
    4. Erase DTC, and then repeat "DTC CONFIRMATION PROCEDURE". Refer to DTC DESCRIPTION .

    Is DTC detected?

    YES 

    GO TO STEP 4  .

    NO 

    INSPECTION END

  4. REPLACE REAR COMBINATION LAMP LH (BODY SIDE) AND ERASE DTC

    1. Turn ignition switch OFF.
    2. Replace rear combination lamp LH (body side). Refer to REMOVAL AND INSTALLATION .
    3. Turn ignition switch ON.
    4. Select "Self Diagnostic Result" mode of "BCM" using CONSULT.
    5. Erase DTC, and then repeat "DTC CONFIRMATION PROCEDURE". Refer to DTC DESCRIPTION .

    Is DTC detected?

    YES 

    Replace BCM. Refer to REMOVAL AND INSTALLATION .

    NO 

    INSPECTION END