Knock Sensor: Testing and Inspection

Component Inspection
Use an ohmmeter which can measure more than 10 Mohm.
1. Disconnect knock sensor harness connector.
2. Check resistance between terminal 1 and ground.

Resistance: 500 - 620 kohm [at 20 °C (68 °F)]

CAUTION: Discard any knock sensors that have been dropped or physically damaged. Use only new ones.