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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Brake Control System (DTC/Circuit Diagnosis) (Without ICC) (Except Hybrid)) >> DTC/Circuit Diagnosis >> DTC C119A: Vacuum Sensor >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

  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. 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
      (Approx.)
      Connector Terminal
      E167 3 Ground 0 V
    4. Turn the ignition switch ON.
      NOTE:

      Start the engine.

    5. Check the voltage between vacuum sensor harness connector and ground.
      Vacuum sensor - Voltage
      (Approx.)
      Connector Terminal
      E167 3 Ground 5 V

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    GO TO STEP 3  .

  3. 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
      E167 3 E125 21 Yes
    4. Check the continuity between vacuum sensor harness connector and ground.
      Vacuum sensor - Continuity
      Connector Terminal
      E167 3 Ground No

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair / replace harness or connector.

  4. 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
      E167 2 Ground No

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair / replace harness or connector.

  5. 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 circuits. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

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

  6. 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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