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Brake Control System (DTC/Circuit Diagnosis)

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connector Inspection 
    1. Turn Ignition Switch Off.
    2. Disconnect ABS Actuator And Electric Unit (Control Unit) Connector E125 And VDC Off Switch Connector.
    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.

  3. Check VDC Off Switch Signal 

    SYMBOL Consult.

    1. Connect ABS Actuator And Electric Unit (Control Unit) Connector E125 And VDC Off Switch Connector.
    2. Turn Ignition Switch On.
    3. In "Data Monitor" Mode 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) Connector E125 And VDC Off Switch Connector.
    3. Check Continuity Between ABS Actuator And Electric Unit (Control Unit) Connector E125 Terminal 39 And VDC Off Switch Connector M148 Terminal 6.

      ABS Actuator And Electric Unit (Control Unit)

      VDC Off Switch

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E125

      39

      M148

      6

      Yes

    4. Check Continuity Between ABS Actuator And Electric Unit (Control Unit) Connector Terminal E125 Terminal 39 And Ground.

      ABS Actuator And Electric Unit (Control Unit)

      -

      Continuity

      Connector

      Terminal

      E125

      39

      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 M148 Terminal 8 And Ground.

    VDC Off Switch

    -

    Continuity

    Connector

    Terminal

    M148

    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.