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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Operation
The
ECM performs all of the
ignition control module functions. The
ignition coil assembly is powered by an ignition feed circuit. The remaining three wires go to the ECM and are the Ignition Control
(IC) circuits. The ECM causes a spark to occur by pulsing an Ignition Control (IC) circuit, which triggers an ignition coil and fires the appropriate
spark plug. The sequencing and the timing are ECM controlled. The ECM uses input from the Crankshaft Position
(CKP) sensor, the Camshaft Position
(CMP) sensor and the
Knock Sensors (KS) in order to appropriately control the
ignition system.