DTC P0351-P0358: Ignition Control Circuit: Description
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2003 Hummer H2, 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 GMC Sierra, and 2003 GMC Cab & Chassis Sierra. However, it is still accessible from the selected car via links, so may be relevant.
The ignition system on this engine uses an individual ignition coil for each cylinder. The Powertrain Control Module (PCM) controls the ignition system operation. The PCM controls each coil using one of 8 Ignition Control (IC) circuits. The PCM commands the IC circuit low when a spark event is requested. This causes the IC module to energize the ignition coil to create a spark at the spark plug. Each ignition coil has the following circuits:
- The Ignition Control (IC) circuit.
- The ignition 1 voltage circuit.
- A ground circuit.
- A reference low circuit.