Circuit Description
WARNING: This page is about a different car, the 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
The ignition system on this engine uses individual ignition coils and ignition control (IC) circuits for each cylinder. The engine control module (ECM) controls the ignition system operation. The ECM controls each coil using the IC circuits. The ECM commands the IC circuit low when a spark event is requested. Each ignition coil is supplied the following circuits:
- The IC circuit
- The ignition 1 voltage circuit
- Two ground circuits
The sequencing and timing are ECM controlled. If the ECM detects the IC circuit is shorted to voltage, this DTC sets.