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 P0357: Ignition Coil 7 Control Circuit

DTC P0358: Ignition Coil 8 Control Circuit

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Ignition 1 Voltage	*	**	--	--
Ignition Coil 1 Control Circuit	P0351	P0351	P0351	--
Ignition Coil 2 Control Circuit	P0352	P0352	P0352	--
Ignition Coil 3 Control Circuit	P0353	P0353	P0353	--
Ignition Coil 4 Control Circuit	P0354	P0354	P0354	--
Ignition Coil 5 Control Circuit	P0355	P0355	P0355	--
Ignition Coil 6 Control Circuit	P0356	P0356	P0356	--
Ignition Coil 7 Control Circuit	P0357	P0357	P0357	--
Ignition Coil 8 Control Circuit	P0358	P0358	P0358	--
* The Engine Cranks but Does Not Run and opens the fuse that supplies voltage to the ignition coils. ** The Engine Cranks but Does Not Run.

Circuit/System Description

Ignition 1 voltage is supplied to the ignition coil (module). The engine control module (ECM) provides a ground for the ignition coil (IC) control circuits. When the ECM 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 ECM.

Conditions for Running the DTC

Conditions for Setting the DTC

The ECM detects an open or short to ground or voltage on the IC circuit for greater than 1 second.

Action Taken When the DTC Sets

DTCs P0351-P0358 are Type B DTCs

Conditions for Clearing the DTC

DTCs P0351-P0358 are Type B DTCs

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Electrical Information Reference

DTC Type Reference

Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Engine Control Module Scan Tool Information

Circuit/System Verification

1. Engine idling, observe the scan tool DTC information. DTCs P0351-P0358 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. Test for less than 5 ohms between the ground circuit terminal A and ground.

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

3. Test for less than 5 ohms between the low reference circuit terminal B 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 1 voltage circuit terminal D and ground.

⇒	If the test lamp does not illuminate, test the ignition 1 voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition 1 voltage circuit fuse is open, test all components connected to the ignition 1 voltage circuit and replace as necessary.

Important: Set the DMM to the AC Hertz scale for this test.

5. Connect a DMM between the ignition control circuit terminal C and ground.
6. Engine cranking, test for greater than 3 hertz between the appropriate ignition control circuit and ground.

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

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

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.