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Home >> Nissan-Datsun >> 2015 >> Sentra SL >> Repair and Diagnosis >> Brakes >> Brakes Control Systems >> Brake Control System >> DTC/Circuit Diagnosis >> VDC Off Switch >> Diagnosis Procedure
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Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

  1. CONNECTOR INSPECTION

    1. Turn ignition switch OFF.
    2. Disconnect ABS actuator and electric unit (control unit) and VDC OFF switch connectors.
    3. Check connectors and terminals for deformation, disconnection, looseness or damage.

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair or replace as necessary.

  2. CHECK VDC OFF SWITCH

    Check VDC OFF switch. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Replace VDC OFF switch. Refer to REMOVAL AND INSTALLATION .

  3. CHECK VDC OFF SWITCH SIGNAL

    G-20 With CONSULT.

    1. Connect ABS actuator and electric unit (control unit) and VDC OFF switch connectors.
    2. Turn ignition switch ON.
    3. In "DATA MONITOR" select "OFF SW" and check VDC OFF switch signal.
      Condition DATA MONITOR
      VDC OFF switch is pressed and released On
      VDC OFF switch is pressed and released again Off

    Is the inspection result normal?

    YES 

    Refer to WORK FLOW .

    NO 

    GO TO STEP 4  .

  4. CHECK VDC OFF SWITCH CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect ABS actuator and electric unit (control unit) and VDC OFF switch connectors.
    3. Check continuity between ABS actuator and electric unit (control unit) connector E33 terminal 15 and VDC OFF switch connector M64 terminal 6.
      ABS actuator and electric unit (control unit) VDC OFF switch Continuity
      Connector Terminal Connector Terminal
      E33 15 M64 6 Yes
    4. Check continuity between ABS actuator and electric unit (control unit) connector terminal E33 terminal 15 and ground.
      ABS actuator and electric unit (control unit) - Continuity
      Connector Terminal
      E33 15 Ground No

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair or replace malfunctioning components.

  5. CHECK VDC OFF SWITCH GROUND CIRCUIT

    Check continuity between VDC OFF switch connector M64 terminal 8 and ground.

    VDC OFF switch - Continuity
    Connector Terminal
    M64 8 Ground Yes

    Is the inspection result normal?

    YES 

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

    NO 

    Repair or replace malfunctioning components.

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