Knock Sensor: Testing and Inspection

KNOCK SENSOR (KS) INSPECTION [MZI-3.7]

NOTE: Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. (See HOW TO USE THIS MANUAL.)

Resistance Inspection
1. Turn the ignition switch to LOCK.
2. Disconnect the KS connector.
3. Measure the resistance between the KS terminals.
KS(RH): KS terminals A and B
KS(LH): KS terminals C and D
- 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".

KS resistance
4.39-5.35 Mohms

Circuit Open/Short Inspection






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

Open circuit
- If there is no continuity, the circuit is open. Repair or replace the wiring harness.
- KS terminal A and PCM terminal 2Q
- KS terminal B and PCM terminal 2M
- KS terminal C and PCM terminal 2L
- KS terminal D and PCM terminal 2G

Short circuit
- If there is continuity, the circuit is shorted. Repair or replace the wiring harness.
- KS terminal A and power supply
- KS terminal A and body ground
- KS terminal B and power supply
- KS terminal B and body ground
- KS terminal C and power supply
- KS terminal C and body ground
- KS terminal D and power supply
- KS terminal D and body ground