P0354

DTC P0351-P0354

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

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview






Circuit/System Description

The ignition system uses individual ignition coil/module assemblies for each cylinder. The engine control module (ECM) 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 ECM 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 ECM detects an open on the circuit or the ignition coil/module for less than 1 second.
OR
* The ECM detects a short to ground on the circuit or the ignition coil/module for less than 1 second.
OR
* The ECM 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 ECM.

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 ECM.
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 ECM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

* Ignition Coil Replacement
* Refer to Programming and Relearning.Programming and Relearning