Knock Sensor: Testing and Inspection

KNOCK SENSOR (KS) INSPECTION[L3]

NOTE: Perform the following test only when directed.

Resistance Inspection
1. Turn the ignition switch to LOCK.
2. Disconnect the KS connector.
3. Measure the resistance between the KS terminals A and B using an ohmmeter.
- It not as specified, replace the KS.
- If the KS is normal, but PID value is out of specification, perform the "Circuit Open/Short Inspection".

Specification: Approx. 4.87 megohms

Circuit Open/Short Inspection




1. Disconnect the PCM connector.
2. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- KS terminal A and PCM terminal 2U
- KS terminal B and PCM terminal 2V

Short circuit
- If there is continuity, there is a short circuit. Repair or replace the wiring harness.
- KS terminal A and power supply
- KS terminal A and body GND
- KS terminal B and power supply
- KS terminal B and body GND