Diagnostic Instructions

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	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Ignition Voltage - Bank 1	P0300-P0306, P0351, P0353, P0355, P2300, P2306, P2312	P0300-P0306, P0351, P0353, P0355	--	P0300, P0301, P0303, P0305
Ignition Voltage - Bank 2	P0300-P0306, P0352, P0354, P0356, P2303, P2309, P2315	P0300-P0306, P0352, P0354, P0356	--	P0300, P0302, P0304, P0306
Ignition Coil 1 Control Circuit	P0301, P2300	P0301, P0351	P0301, P2301	P0300, P0301
Ignition Coil 2 Control Circuit	P0302, P2303	P0302, P0352	P0302, P2304	P0300, P0302
Ignition Coil 3 Control Circuit	P0303, P2306	P0303, P0353	P0303, P2307	P0300, P0303
Ignition Coil 4 Control Circuit	P0304, P2309	P0304, P0354	P0304, P2310	P0300, P0304
Ignition Coil 5 Control Circuit	P0305, P2312	P0305, P0355	P0305, P2313	P0300, P0305
Ignition Coil 6 Control Circuit	P0306, P2315	P0306, P0356	P0306, P2316	P0300, P0306

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

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 50 seconds.

P02300, P2303, P2306, P2309, P2312, P2315

The ECM detects the ignition control circuit is shorted to ground for greater than 4 seconds or a cumulative of 50 seconds.

P2301, P2304, P2307, P2310, P2313, P2316

The ECM detects the ignition control circuit is shorted to a voltage for greater than 4 seconds or a cumulative of 50 seconds.

Action Taken When the DTC Sets

DTCs P0351, P0352, P0353, P0354, P0355, and P0356 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0351, P0352, P0353, P0354, P0355, and P0356 are Type B DTCs.

Diagnostic Aids

The following table illustrates the ECM connector locations:

ECM Connector Location
X2	X1
Front of Vehicle

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Electronic Ignition (EI) System Description

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Operate the engine above 700 RPM while observing the scan tool Misfire Current Counters. The Misfire Current Counters should not be incrementing.
2. Operate the engine above 700 RPM for 20 seconds. Observe the scan tool DTC information. DTCs P0351, P0352, P0353, P0354, P0355, P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 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 are captured in the Freeze Frame/Failure Records Data List.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate ignition coil.
2. Test for less than 5 ohms between the ground circuit terminal 3 and ground.

⇒	If greater than the specified range, repair the open, or high resistance in the ground circuit.

3. Test for less than 5 ohms between the ground circuit terminal 4 and ground.

⇒	If greater than the specified range, repair the open, or high resistance in the ground circuit.

4. Ignition ON, load test for B+ between the ignition voltage circuit terminal 2 and ground.

⇒	If less than the specified range, test the ignition voltage circuit for a short to ground, or an open/high resistance. Replace the fuse if necessary.

5. Connect a DMM, set on the DC Hz scale, between the IC circuit terminal 1 and ground.
6. Engine cranking, or idling, test for 3-20 Hz between the IC circuit terminal 1 and ground.

⇒	If not within the specified range, test the IC circuit for a short to ground, short to voltage, or an open/high resistance. If the circuit/connection tests normal, replace the ECM.

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

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.