Circuit Description
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2002 Saturn Vue, 2002 Pontiac Montana, 2002 Pontiac Aztek, 2002 Oldsmobile Silhouette, and 2002 Oldsmobile Bravada. However, it is still accessible from the selected car via links, so may be relevant.
The electronic ignition system uses an individual ignition coil for each cylinder. Powertrain Control Module (PCM) controls ignition operation through 8 individual Ignition Control (IC) circuits. Each bank of 4 ignition coils is connected to PCM, power, or ground by the following circuits:
- Low Reference
- Chassis Ground
- Ignition 1 Voltage
- Appropriate IC Circuit
PCM triggers an ignition coil by grounding appropriate IC circuit using information from Crankshaft Position (CKP) and Camshaft Position (CMP) sensors.