P0356

DTC P0351-P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* 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 P2300
- Ignition Coil 1 Control Circuit Low Voltage

DTC P2301
- Ignition Coil 1 Control Circuit High Voltage

DTC P2303
- Ignition Coil 2 Control Circuit Low Voltage

DTC P2304
- Ignition Coil 2 Control Circuit High Voltage

DTC P2306
- Ignition Coil 3 Control Circuit Low Voltage

DTC P2307
- Ignition Coil 3 Control Circuit High Voltage

DTC P2309
- Ignition Coil 4 Control Circuit Low Voltage

DTC P2310
- Ignition Coil 4 Control Circuit High Voltage

DTC P2312
- Ignition Coil 5 Control Circuit Low Voltage

DTC P2313
- Ignition Coil 5 Control Circuit High Voltage

DTC P2315
- Ignition Coil 6 Control Circuit Low Voltage

DTC P2316
- Ignition Coil 6 Control Circuit High Voltage

Diagnostic Fault Information






Circuit/System Description

The ignition system on this engine uses individual ignition coils and ignition control (IC) circuits for each cylinder. Ignition voltage is supplied to each bank of ignition coils. The engine control module (ECM) controls the ignition system operation. The ECM controls each coil using the IC circuits. The ECM commands the IC circuit low when a spark event is requested.

The sequencing and timing are ECM controlled.

Conditions for Running the DTC

* The engine is operating.
* The ignition voltage is between 10-18 volts.
* The engine speed is between 400-5,000 RPM.
* The DTCs run continuously once per crankshaft revolution after the above conditions are met for 20 crankshaft revolutions.

Conditions for Setting the DTC

P0351-P0356

The ECM detects the ignition control circuit is open for greater than 4 seconds or a cumulative of 30 seconds.

P2300, P2303, P2306, P2309, P2312, or P2315

The ECM detects the ignition control circuit is shorted to ground for more than 4 seconds or a cumulative of 30 seconds.

P2301, P2304, P2307, P2310, P2313, or P2316

The ECM detects the ignition control circuit is shorted to voltage for more than 4 seconds or a cumulative of 30 seconds.

Action Taken When the DTC Sets

DTCs P0351, P0352, P0353, P0354, P0355, P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, and P2316 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0351, P0352, P0353, P0354, P0355, P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, and P2316 are Type B DTCs.

Diagnostic Aids

* Inspect the ignition coils for aftermarket devices. An aftermarket device connected to the ignition coil circuits, may cause this DTC to set.
* If the condition is intermittent, moving the related harnesses and connectors, with the engine operating, while monitoring the appropriate scan tool Misfire Current Cylinder parameter may help to isolate the condition.

Circuit/System Verification

1. Operate the engine for 30 seconds. Observe the DTC information with a scan tool. DTC P0351, P0352, P0353, P0354, P0355, P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 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 appropriate ignition coil.

Important: The ignition circuit supplies voltage to other components. Make sure you test all circuits for a short to ground or test all components for being shorted that share the ignition circuit.

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

3. Crank or start the engine. Test for 200-400 mV between the appropriate IC circuit terminal C and ground.

^ If less than the specified range, test the IC circuit for a short to ground or an open/high resistance. If the circuit/connection tests normal, replace the ECM.

^ If greater than the specified range, test the IC circuit for a short to voltage. If the circuit/connection tests normal, replace the ECM.

4. Ignition OFF, connect a test lamp between the low reference circuit terminal B and B+. The test lamp should illuminate.

^ If the test lamp does not illuminate, test for an open/high resistance in the low reference circuit. If the circuit/connection tests normal, replace the ECM.

5. Connect a test lamp between the ground circuit terminal A and B+. The test lamp should illuminate.

^ If the test lamp does not illuminate, test for an open, or high resistance in the ground circuit.

6. If all circuits/connections test normal, replace the ignition coil.

Repair Instructions

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

* Ignition Coil Replacement - Bank 1
* Ignition Coil Replacement - Bank 2.