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
This sensor is mounted on the engine block and monitors ignition knock (Detonation). This signal is sent to the ECU which in turn, retards the ignition timing until detonation ceases. This control prevents internal damage to engine valves and pistons. The
Knock Sensor inputs the ECU through terminal KNK.