Circuit Description
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The engine control module (ECM) controls the ignition coils by pulsing the ignition control (IC) circuits, which triggers an ignition coil and fires the spark plug. The ECM controls the sequencing and the timing of each ignition coil. The ignition system consist of the following components:
- The 6 ignition coils
- The crankshaft position (CKP) sensor
- The 4 camshaft position (CMP) sensors
- The ECM
The ignition coils use the following circuits:
- An IC circuit
- An ignition 1 voltage circuit
- Two ground circuits