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
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Knock Sensor: Description and Operation
Knock sensors are not used on all engines. Refer to system wiring schematics for specific applications.
The cylinder head mounted
knock sensor is used to signal the ECU during times of engine detonation. When detonation does occur, the ECU retards the ignition timing advance to the applicable cylinder(s) as necessary.