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
ESC Wiring Diagram:
The Electronic Spark Control (ESC) system is comprised of an ESC module,
knock sensor and the ECM. As the knock sensor detects engine knock, it sends a voltage signal to the ESC module, which sends 0 volts to the ECM. This signals the ECM to retard the timing, which eliminates detonation. As detonation is reduced, the ECM advances the timing again in small increments.
