P0352

DTC P0351-P0354

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) 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/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:

* Ignition voltage
* Ground
* IC
* Low reference

Conditions for Running the DTC

* The engine is running.
* DTCs P0351-P0354 run 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.

Reference Information
Schematic Reference

Engine Controls Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

* Start and idle the engine.
* Observe the scan tool DTC Information and the Misfire Current Cyl. parameters. This will indicate the affected ignition coil/modules, and if the condition is current.
* Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF for 90 seconds, disconnect the ECM.
2. Test the affected IC circuit terminal 3 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.

3. Connect the ECM.
4. Exchange the affected ignition coil/module with the ignition/coil module of a good cylinder.
5. 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 (Verification Tests) after completing the diagnostic procedure.

* Ignition Coil Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for ECM replacement, setup, and programming