P0351

DTC P0351-P0354

Diagnostic Instructions

- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic approach.
- Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0351: Ignition Coil 1 Control Circuit
DTC P0352: Ignition Coil 2 Control Circuit
DTC P0353: Ignition Coil 3 Control Circuit
DTC P0354: Ignition Coil 4 Control Circuit

Diagnostic Fault Information






Circuit Description

The ignition system uses individual ignition coil/module assemblies for each cylinder. The powertrain control module (PCM) controls the individual coils by transmitting timing pulses on the ignition control (IC) circuit of each ignition coil/module to enable a spark event. The PCM monitors each IC circuit for improper voltage levels. Each ignition coil/module has the following circuits:

- An ignition voltage circuit.
- A ground.
- An IC control circuit.
- A low reference circuit.

Conditions for Running the DTC

- The engine is running.
- DTCs P0351-P0354 runs continuously when the above condition is met.

Conditions for Setting the DTC

- The PCM detects an open on the circuit or the ignition coil/module for less than 1 second
OR
- The PCM detects a short to ground on the circuit or the ignition coil/module for less than 1 second
OR
- The PCM detects a short to voltage on the circuit or the ignition coil/module for less than 1 second.

Action Taken When the DTC Sets

DTCs P0351-P0354 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0351-P0354 are Type B DTCs.

Circuit/System Verification

- Start and idle the engine.
- Observe the scan tool DTC Information and the Misfire Current Cylinder parameters. This will indicate the affected ignition coil/modules, and if the condition is current.

Circuit/System Testing

1. Turn OFF the ignition.
2. Disconnect the PCM.

Important: A high resistance on any IC circuit can cause a misfire before the DTC sets.

3. Test the affected IC circuit for an open, a high resistance, a short to ground and for a short to voltage.
-> If a fault is found, repair the circuit as needed.
4. Connect the PCM.
5. Exchange the affected ignition coil/module with the ignition/coil module of a good cylinder.
6. Start the engine and observe the scan tool.
-> If the DTC or the misfire transfers with the suspect ignition/coil module, replace as needed.
-> If the DTC or the misfire does not transfer with the suspect ignition/coil module, replace the PCM.