Knock Sensor: Testing and Inspection
KNOCK SENSOR^ Use an ohmmeter which can measure more than 10 Mohms.
1. Disconnect knock sensor harness connector.
2. Check resistance between terminal "2" and ground.
Resistance: 500-620 kohms [at 25°C (77°F)]
CAUTION: Do not use any knock sensors that have been dropped or physically damaged. Use new knock sensors only.