Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the logical successor to CHARM, I recommend you try it!

Link: lemon-manuals.la

Knock Sensor: Testing and Inspection

- Use an ohmmeter which can measure more than 10 mOhms.

1. Disconnect knock sensor harness connector.
2. Check resistance between terminal 1 and ground.
Resistance: 500 - 620 kOhms [at 20 °C (68 °F)]

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