Knock Sensor: Testing and Inspection

Use an ohmmeter which can measure more than 10 M (ohms).
1. Disconnect knock sensor harness connector.
2. Check resistance between terminal 2 and ground.

Resistance: 500 - 620 K Ohms [at 25°C (77°F)]

CAUTION: Do not use any knock sensors that have been dropped or physically damaged. Use only new ones.