DTC P0351-P0358: Ignition Coil Primary Secondary Circuit: Description

WARNING: This page is about a different car, the 2003 Cadillac Seville and 2003 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.

There are 2 separate ignition module assemblies, one for each bank of cylinders. Each assembly contains an Ignition Control (IC) module and 4 coils. Each IC module consists of the following circuits:

An ignition 1 voltage.
A ground.
An IC timing low reference.
IC circuits for cylinders 1-8.

Each ignition coil connects directly to its spark plug via a short boot. The IC circuits transmit timing pulses from the Powertrain Control Module (PCM) to the IC modules, which triggers the coils to fire the plugs in the correct sequence. The PCM monitors each IC circuit for improper voltage levels. If a short to ground occurs in one of the IC circuits, DTC P0351-P0358 sets.