P0353
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. When the engine is running 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 DTCs
* The engine speed is less than 6,000 RPM.
* The ignition 1 voltage signal is between 9-18 volts.
* DTCs P0351, P0352, P0353, P0354 run continuously when the above conditions are met.
Conditions for Setting the DTCs
The ECM detects an open in the circuit or the ignition coil/module for greater than 4 seconds continuously or 50 seconds cumulative.
Action Taken When the DTC Sets
DTCs P0351, P0352, P0353, P0354 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0351, P0352, P0353, 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
1. Start and idle the engine.
2. Observe the scan tool Misfire Current Cylinder parameters. The counters should not be incrementing.
3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. 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, disconnect the harness connector at the affected ignition coil/module.
2. Ignition OFF for 90 seconds, disconnect the ECM connector X1.
3. Test for less than 5.0 ohms between the ignition coil/module IC circuit terminal 3 and the appropriate ECM terminal listed below:
* IC 1 circuit: terminal 55
* IC 2 circuit: terminal 80
* IC 3 circuit: terminal 79
* IC 4 circuit: terminal 56
• If greater than the specified range, test the IC circuit for an open/high resistance.
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
* Ignition Coil Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for ECM replacement, setup, and programming
Repair Verification
If the customer concern was a flashing MIL, then perform the following procedure:
1. Install any components that have been removed or replaced during diagnosis.
2. Perform any adjustments, programming or setup procedures that are required when a component is removed or replaced.
3. Clear the DTCs.
4. Turn OFF the ignition for 60 seconds.
5. If the repair was related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to the Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code Descriptions) and perform the appropriate diagnostic procedure.
6. To verify that the performance of the catalytic converter has not been affected by the condition that set this DTC, perform the Repair Verification for DTC P0420. Refer to DTC P0420 (P0420).