FixVault

Diagnosis Procedure

  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connection E38. Refer to "CIRCUIT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Repair or replace ground connection.

  2. CHECK KNOCK SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
    1. Disconnect knock sensor harness connector.
    2. Disconnect ECM harness connector.
    3. Check the continuity between knock sensor harness connector and ECM harness connector.
      CONTINUITY SPECIFICATION

      Knock sensor ECM Continuity
      Connector Terminal Connector Terminal
      F12 2 F8 40 Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: Repair open circuit or short to ground or short to power in harness or connectors.

  3. CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Check the continuity between knock sensor harness connector and ECM harness connector.
      CONTINUITY SPECIFICATION

      Knock sensor ECM Continuity
      Connector Terminal Connector Terminal
      F12 1 F8 37 Existed
    2. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO 4.

    NO: Repair open circuit or short to ground or short to power in harness or connectors.

  4. CHECK KNOCK SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 5.

    NO: Replace knock sensor.

  5. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END