Knock Sensor: Testing and Inspection
KNOCK SENSOR (KS) INSPECTIONNOTE: 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.
- If 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 check)
Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- KS terminal A and PCM terminal 81*1, 2S*2
- KS terminal B and PCM terminal 3*1, 2P*2
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
*1 : California emission regulation applicable ATX model
*2 : Except for California emission regulation applicable ATX model