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Home >> Infiniti >> 2015 >> Q50 Base, RWD >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Brake Control System (VDC - Diagnostic Trouble Codes (DTCS) Symptom Tests And Component R&R) (Exc Hybrid) >> DTC/Circuit Diagnosis >> VDC Off Switch >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

  1. CHECK VDC OFF SWITCH CIRCUIT

    1. Turn the ignition switch OFF.
    2. Disconnect ABS actuator and electric unit (control unit) harness connector.
    3. Disconnect VDC OFF switch harness connector.
    4. Check the continuity between ABS actuator and electric unit (control unit) harness connector and triple switch harness connector.
      ABS actuator and electric unit (control unit) Triple switch Continuity
      Connector Terminal Connector Terminal
              Existed
    5. Check the continuity between ABS actuator and electric unit (control unit) harness connector and ground.
      ABS actuator and electric unit (control unit) - Continuity
      Connector Terminal
          Ground Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair / replace harness, connector, or terminal.

  2. CHECK VDC OFF SWITCH GROUND CIRCUIT

    Check the continuity between triple switch harness connector and ground.

    Triple switch - Continuity
    Connector Terminal
        Ground Existed

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair / replace harness, connector, or terminal.

  3. CHECK VDC OFF SWITCH

    Check the VDC OFF switch. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Replace the VDC OFF switch. Refer to REMOVAL AND INSTALLATION .

  4. CHECK VDC OFF SWITCH SIGNAL

    With CONSULT

    1. Connect ABS actuator and electric unit (control unit) harness connector.
    2. Connect VDC OFF switch harness connector.
    3. Select "ABS", "DATA MONITOR" and "OFF SW" according to this order. Check the VDC OFF switch signal.
      Condition DATA MONITOR
      When VDC OFF switch is pressed and VDC OFF indicator lamp in combination meter is in ON status On
      When VDC OFF switch is pressed and VDC OFF indicator lamp in combination meter is in OFF status Off

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    GO TO STEP 5  .

  5. CHECK TERMINAL

    1. Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
    2. Check the VDC OFF switch pin terminals for damage or loose connection with harness connector.

    Is the inspection result normal?

    YES 

    Replace the ABS actuator and electric unit (control unit). Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair / replace harness, connector, or terminal.

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