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 (KS) Sensor

The Knock Sensor (KS) detects abnormal vibration, or spark knock, in the engine. The sensor is mounted in the engine block near the cylinders. The knock sensor produces an AC output voltage that increases with the severity of the knock. This signal voltage is sent to the Powertrain Control Module (PCM). The. PCM then adjusts the Ignition Control (IC) timing to reduce the spark knock.

A fault in the KS circuit will set a DTC P0325.