Manuals through 2025 now available!
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LEMON is the spiritual successor to CHARM, I recommend you try it!
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lemon-manuals.org.ua
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Operation
The Catera
ignition system consists of 2 coil packs and the
ECM. There is no separate
ignition control module. 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 in order to appropriately control the ignition system.