Knock Sensor: Service and Repair

REMOVAL
1. Disconnect the negative battery cable.
2. Raise the car.
3. Disconnect the Electronic Spark Control (ESC) wiring harness connector from the ESC sensor.
4. Remove the ESC sensor from the engine block.

INSTALLATION
1. Install the ESC sensor into engine block and torque to 14 Nm (19 lb ft).

NOTE: Be sure the ESC sensor threads are clean.

2. Connect the ESC wiring harness connector to the ESC sensor.
3. Lower the car.
4. Connect the negative battery cable.
5. Before starting engine, follow the "Idle Learn Procedure" below.

NOTE: The Electronic Control Module (ECM) will need to relearn the Idle Air Control (IAC) valve pintle position following battery reconnection. This procedure allows the ECM memory to be updated and provides for a stable idle speed.

Idle Learn Procedure
1. Install the Tech 1 "SCAN" tool.
2. Ignition "ON" engine "OFF".
3. Select the "IAC SYSTEM", then "IDLE LEARN" in the "MISC. TEST" mode.
4. Proceed with the idle learn as directed by the Tech 1 "SCAN" tool.