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)
Or, hide this message:
temporarily or
permanently
Knock Sensor: Description and Operation
The
knock sensor is located in the engine block and sends a signal to the ESC module which then sends a signal to the PCM which retards ignition timing during a spark knock condition. When the knock sensor senses no more knocking the PCM advances timing in small increments. This allows the PCM to maintain maximum timing advance under various conditions.
