Knock Sensor: Testing and Inspection

TROUBLESHOOTING PROCEDURES










CIRCUIT DIAGRAM








HARNESS INSPECTION PROCEDURES


SENSOR INSPECTION
1. Disconnect the knock sensor connector.




2. Measure resistance between the terminal 2 and 3.

Standard value: about 5M ohms at 20°C (68°F)

3. If the resistance is continual, replace the knock sensor.

Tightening torque: 16-28 Nm (11.8-18.4 lb.ft.)

4. Measure the capacitance between terminals 2 & 3.

Standard value: 800-1600 pF

TROUBLESHOOTING HINTS
Use the above diagnostics, when knock sensor signal is abnormally low.