Operation CHARM: Car repair manuals for everyone.
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 spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Knock Sensor: Testing and Inspection

1. Verify that the ignition switch is at OFF.
2. Disconnect knock sensor connector.
3. Measure the resistance between knock sensor terminal and the knock sensor body by using an ohmmeter.
- If not as specified, replace the knock sensor.

Specification: Approx. 560 kohms [20 °C {68 °F}]