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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 >> DTC C119A: Vacuum Sensor >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

  1. CHECK CONNECTOR

    1. Turn the ignition switch OFF.
    2. Check the vacuum sensor harness connector for disconnection or looseness.
    3. Check the ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair / replace harness or connector, and GO TO STEP 2  .

  2. PERFORM SELF-DIAGNOSIS

    With CONSULT

    1. Turn the ignition switch OFF → ON.
      CAUTION:
      • Be sure to wait of 10 seconds after turning ignition switch OFF or ON.
      • Start the engine.
    2. Repeat step 1 two or more times.
    3. Perform self-diagnosis for "ABS".

    Is DTC "C119A" detected?

    YES 

    GO TO STEP 3  .

    NO 

    INSPECTION END

  3. CHECK VACUUM SENSOR POWER SUPPLY

    1. Turn the ignition switch OFF.
    2. Disconnect vacuum sensor harness connector.
    3. Check the voltage between vacuum sensor harness connector and ground.
      Vacuum sensor - Voltage
      Connector Terminal
      E62 3 Ground 0 V
    4. Turn the ignition switch ON.
      CAUTION:

      Start the engine.

    5. Check the voltage between vacuum sensor harness connector and ground.
      Vacuum sensor - Voltage
      Connector Terminal
      E62 3 Ground 4.75 V - 5.25 V

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    GO TO STEP 4  .

  4. CHECK VACUUM SENSOR POWER SUPPLY CIRCUIT

    1. Turn the ignition switch OFF.
    2. Disconnect ABS actuator and electric unit (control unit) harness connector.
    3. Check the continuity between vacuum sensor harness connector and ABS actuator and electric unit (control unit) harness connector.
      Vacuum sensor ABS actuator and electric unit (control unit) Continuity
      Connector Terminal Connector Terminal
      E62 3 E35 28 Existed
    4. Check the continuity between vacuum sensor harness connector and ground.
      Vacuum sensor - Continuity
      Connector Terminal
      E62 3 Ground Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Repair / replace harness or connector.

  5. CHECK VACUUM SENSOR GROUND CIRCUIT

    1. Turn the ignition switch OFF.
    2. Check the continuity between vacuum sensor harness connector and ground.
      Vacuum sensor - Continuity
      Connector Terminal
      E62 2 Ground Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Repair / replace harness or connector.

  6. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND CIRCUIT

    Check the ABS actuator and electric unit (control unit) power supply and ground circuit. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    Repair / replace harness, connector, fuse, or fusible link.

  7. CHECK TERMINAL

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