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: Description and Operation
The
Knock Sensor is a feedback signal used to control of ignition timing. When knocking occurs, the Knock Sensor sends the signal to the ECM The ECM then retards the ignition timing to reduce or eliminate the knock.