Knock Sensor: Service and Repair

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

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

NOTE: Be sure the ESC sensor threads are clean.

^ Connect the ESC wiring harness connector to the ESC sensor.
^ Lower the car.
^ Connect the negative battery cable.
^ Before starting engine, follow the "Idle Learn Procedure".

NOTE: The Electronic Control Module (ECM) will need to relearn the 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
^ Install Tech 1 "Scan" tool.
^ Ignition "ON" engine "OFF."
^ Select "IAC SYSTEM," then "IDLE LEARN" in the "MISC. TEST" mode.
^ Proceed with idle learn as directed by Tech 1 "Scan" tool.