P0354
DTC P0351-P0354
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (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/System Description
Ignition voltage is supplied to the ignition coil. The powertrain control module (PCM) provides a ground for the ignition coil (IC) control circuits. When the PCM removes the ground path of the ignition primary coil, the magnetic field produced by the coil collapses. The collapsing magnetic field produces a voltage in the secondary coil which ignites the spark plugs. The sequencing and timing are controlled by the PCM. After the spark has occurred, the control circuitry sends an ignition fail-safe input signal back to the PCM, confirming that an ignition event has taken place. If the ignition fail-safe input signal is not received by the PCM, a cylinder specific DTC will set.
Conditions for Running the DTC
* The engine is cranking or running.
* The DTCs run continuously once the above condition is met.
Conditions for Setting the DTC
No ignition coil fail-safe input signal is received by the PCM for 2 consecutive ignition signal cycles.
Action Taken When the DTC Sets
* DTCs P0351, P0352, P0353, and P0354 are Type A DTCs.
* The PCM enters the fail-safe function and begins Fuel Cut-off mode operation during high engine load operation.
Conditions for Clearing the DTC
DTCs P0351, P0352, P0353, and P0354 are Type A DTCs.
Diagnostic Aids
Inspect for the following conditions:
* An interruption of the ground circuit or voltage supply to the ignition coil will prevent a proper ignition event from taking place. A DTC P0351 through P0354 can set if there is a intermittent fault in any of the ignition coil circuits.
* If DTCs P0351, P0352, P0353, and P0354 are present, the fault is located in the shared electrical circuits or shared components of the ignition coils.
* Unless the ignition key is cycled or the DTCs are cleared, the PCM waits to receive ignition fail-safe signals before providing fuel injector operation.
* The scan tool data parameters for Misfire Current Cylinder # are frozen at the time the MIL illuminates when the DTC sets.
* If no engine misfire is felt when the DTC sets, inspect for a fault in the Ignition Fail-Safe Input circuit.
* Inspect the noise filter for an internal short or low resistance. The ignition coil may not receive adequate voltage during high load conditions if the noise filter is faulty. A good noise filter will indicate infinite resistance (OL) with a DMM after the capacitor inside the filter is fully charged.
Reference Information
Schematic Reference
Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Electronic Ignition System Description (Description and Operation)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
1. Engine running, observe the DTC information with a scan tool. DTC P0351, P0352, P0353, and P0354 should not set.
2. 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 ignition coil.
2. Ignition OFF, test for less than 10 ohm between the coil ground circuit terminal 4 and ground G104.
• If greater than the specified range, test the coil ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal 1 and ground.
• If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, test the IG2 ignition relay. Refer to Ignition Relay Diagnosis (Ignition Relay Diagnosis).
Note: Clear the DTCs before performing this test.
4. Engine cranking, test for 0.2-1.0 V between the ignition control circuit terminal 3 and ground.
• If less than the specified range, test the ignition control circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the PCM.
• If greater than the specified range, test the ignition control circuit for a short to voltage. If the circuit tests normal, replace the PCM.
5. Test for 4.8-5.2 V between the ignition fail-safe circuit terminal 2 and ground.
• If less than the specified range, test the fail-safe circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the PCM.
• If greater than the specified range, test the fail-safe circuit for a short to voltage. If the circuit tests normal, replace the PCM.
6. If all circuits test normal, test or replace the ignition coil.
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 control module replacement, setup, and programming