Knock Sensor: Testing and Inspection

KNOCK SENSOR (KS) INSPECTION

Inspection of Resistance

NOTE: Perform the following test only when directed.

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




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

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

4. Reconnect the KS connector.

Circuit Open/Short Inspection

Open circuit
- If there is no continuity, the circuit is open. Repair or replace the harness.
- KS circuit (KS connector terminal A and PCM connector terminal 4M through common connector.)

Short circuit
- If there is continuity, the circuit is shorted. Repair or replace the harness.
- KS connector terminal A and PCM connector terminal 4M through common connector to GND.