P0354
CIRCUIT DESCRIPTIONThere are two separate ignition module assemblies, one for each bank of cylinders. Each assembly contains an ignition control (IC) module and four 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 CI circuits, DTC P0351-P0358 sets.
CONDITIONS FOR RUNNING THE DTC
The engine speed is more than 400 RPM.
CONDITIONS FOR SETTING THE DTC
The PCM detects a short to ground on the IC circuit for less than 1 second.
ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.
TEST
