Diagnosis Procedure
- CHECK GROUND CONNECTION
- Turn ignition switch OFF.
- Check ground connection E38. Refer to "CIRCUIT INSPECTION ".
Is the inspection result normal?
YES: GO TO 2.
NO: Repair or replace ground connection.
- CHECK KNOCK SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
- Disconnect knock sensor harness connector.
- Disconnect ECM harness connector.
- 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 - 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.
- CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- 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 - 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.
- Check the continuity between knock sensor harness connector and ECM harness connector.
- CHECK KNOCK SENSOR
Refer to "COMPONENT INSPECTION ".
Is the inspection result normal?
YES: GO TO 5.
NO: Replace knock sensor.
- CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".
INSPECTION END