The KS is a tuned accelerometer on the engine which converts engine vibration to an electrical signal. The PCM uses this signal to determine the presence of engine knock and to retard spark timing.
Removal & Installation
- Disconnect the battery ground cable.
- Remove the intake manifold.
- Remove the knock sensor (KS).
- Remove the retaining bolt.
- Remove the knock sensor.
Installation is the reverse of the removal procedure. Tighten the sensor to 15 ft. lbs. (20 Nm).
- Verify that the knock sensor is properly installed.
- Disconnect the sensor connector.
- Using a DVOM, measure the resistance between the sensor pins. It should be between 4.39-5.35 m/ohms.
- If the sensor does not test within this range, it should be replaced.