Knock Sensor: Testing and Inspection

Inspection of Resistance

NOTE: Perform the following test only when directed.

1. Verify that the ignition switch is at LOCK.
2. Disconnect knock sensor connector.




3. Measure the resistance between knock sensor terminal A and the knock sensor body using an ohmmeter.
- If not as specified, replace the knock sensor.
- If knock sensor is okay, but PID value is out of specification, perform the "Circuit Open/Short Inspection".

Specification
Approx. 560 kOhms. [20 °C {68 °F}]

4. Reconnect the knock sensor connector.

Circuit Open/Short Inspection

Open circuit
- If there is no continuity, the circuit is open. Repair or replace the harness.
- Knock sensor circuit (Knock sensor connector terminal A and PCM connector terminal 2F through common connector.)

Short circuit
- If there is continuity, the circuit is shorted. Repair or replace the harness.
- Knock sensor connector terminal A and PCM connector terminal 2F through common connector to ground.