Knock Sensor: Testing and Inspection

Inspection of Resistance

NOTE:
- Perform the following test only when detected.

1. Verify that the ignition switch off.
2. Disconnect knock sensor connector.




3. Measure the resistance between knock sensor terminal A and the knock sensor body by using an ohmmeter.

Specification; Approx. 560 Kohm (20°C (68°F))

4. If not as specified, replace the knock sensor. If knock sensor is okay, but PID value is out of specification, inspect as follows:

Open circuit
- Knock sensor circuit (Knock sensor connector terminal A and PCM connector terminal 2F through common connector.)

Short circuit
- Knock sensor connector terminal A and PCM connector terminal 2F through common connector to ground.

5. Reconnect the knock sensor connector.