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P0358




DTC P0351-P0358

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

DTC P0355
- Ignition Coil 5 Control Circuit

DTC P0356
- Ignition Coil 6 Control Circuit

DTC P0357
- Ignition Coil 7 Control Circuit

DTC P0358
- Ignition Coil 8 Control Circuit

Diagnostic Fault Information





Circuit/System Description

The ignition system on this engine uses an individual module/coil for each cylinder. The engine control module (ECM) controls the spark event for each cylinder through the 8 individual ignition control (IC) circuits. When the ECM commands the IC circuit ON, electrical current will flow through the primary winding of the ignition coil, creating a magnetic field. When a spark event is requested, the ECM will command the IC circuit OFF, interrupting current flow through the primary winding. The magnetic field created by the primary winding will collapse across the secondary coil windings, producing a high voltage across the spark plug electrodes. The ECM uses information from the crankshaft position (CKP) sensor, and the camshaft position (CMP) sensor for sequencing and timing of the spark events. The ECM monitors each IC circuit for improper voltage levels. Each ignition module/coil assembly has the following electrical circuits attached:

* An ignition 1 voltage circuit
* A ground circuit
* An IC circuit
* A low reference circuit

Conditions for Running the DTC

* The engine is cranking or running.
* DTCs P0351-P0358 runs continuously when the above condition is met.

Conditions for Setting the DTC

The ECM detects one of the following failures on the IC circuit for up to 6 seconds:

* An open
* A short to ground
* A short to voltage

Actions Taken When the DTC Sets

DTC P0351-P0358 are Type B DTCs.

Conditions For Clearing the DTC

DTC P0351-P0358 are Type B DTCs.

Reference Information
Schematic Reference

Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
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 Cylinder 1-8 IC Circuit Status parameters. Each parameter should display OK or Not Run.
2. Engine running, observe the DTC information with a scan tool. DTC P0351, P0352, P0353, P0354, P0355, P0356, P0357, or P0358 should not set.
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 appropriate ignition coil.
2. Test for less than 5 ohm between the ground circuit terminal D and ground.

• If greater than the specified range, repair the ground circuit for an open/high resistance.

3. Ignition OFF, all vehicle systems OFF, this may take up to 2 minutes. Test for less than 5 ohm between the low reference circuit terminal C and ground.

• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

4. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal A 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 and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.

5. Connect a DMM between the ignition control circuit terminal B and ground.
6. Engine running, test for 200-700 mV between the ignition control circuit and ground.

• If less than the specified range, test the ignition control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
• If greater than the specified range, test the ignition control circuit for a short to voltage. If the circuit tests normal, replace the ECM.

7. If all circuits test normal, test or replace the ignition coil.

Repair Instructions

* Ignition Coil Replacement - Bank 1 (Ignition Coil Replacement - Bank 1), Ignition Coil Replacement - Bank 2 (Ignition Coil Replacement - Bank 2)
* Control Module References (Programming and Relearning) for ECM replacement, setup, and programming

Repair Verification

Note: An ignition system misfire condition can cause the 3-way catalytic converter to overheat under certain driving conditions.

If the customer concern was a flashing MIL, perform the following procedure:

1. Install any components or connectors that have been removed or replaced during diagnosis.
2. Perform any adjustment, programming, or setup procedures that are required when a component or module 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 (DTC) List - Vehicle) 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 or P0430. Refer to DTC P0420 or P0430 (P0420).

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