P0351

DTC P0351 or P0352

DTC Descriptors
DTC P0351
- Ignition Coil 1 and 4 Control Circuit

DTC P0352
- Ignition Coil 2 and 3 Control Circuit

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.






Circuit/System Description

Ignition 1 voltage is supplied to the ignition coil. 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. The ignition coils consist of the following circuits:

* The ignition 1 voltage
* The IC 1 and 4 control
* The IC 2 and 3 control

Conditions for Running the DTC

* The engine is operating.
* The DTCs run continuously once the above condition is met.

Conditions for Setting the DTC

The ECM detects an open, short to ground, or a short to voltage on the IC circuit.

Action Taken When the DTC Sets

DTC P0351 and P0352 are Type B DTCs.

Conditions for Clearing the DTC

DTC P0351 and P0352 are Type B DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics Electrical Diagrams

Connector End View Reference
* Engine Controls Connector End Views Engine Controls Connector End Views
* Engine Control Module (ECM) Connector End Views Engine Control Module (ECM) Connector End 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

Diagnostic Trouble Code (DTC) Type Definitions Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference
* Scan Tool Data List Scan Tool Data List
* Scan Tool Data Definitions Scan Tool Data Definitions
* Scan Tool Output Controls Scan Tool Output Controls

Circuit/System Verification

1. Engine idling, observe the DTC information with a scan tool. DTC P0351 and P0352 should not set.
2. If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. 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 of the ignition coil.

Important: The test lamp is used to load the circuit and may not illuminate.


2. Connect a test lamp between the ignition 1 voltage circuit of the ignition coil and the negative terminal of the battery.
3. Ignition ON, test for less than 0.1 volt between the ignition 1 voltage circuit of the ignition coil and the positive terminal of the battery.

• If greater than 0.1 volt, repair the ignition 1 voltage circuit of the ignition coil for a short to ground or an open/high resistance.

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


4. Connect a DMM between the appropriate ignition control circuit and the negative terminal of the battery.
5. While cranking the engine, test for more than 3 Hz between the appropriate ignition control circuit and the negative terminal of the battery.

• If less than 3 Hz, test the ignition control circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit/connection test normal, replace the ECM.

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

Repair Instructions

Important: Always perform the Diagnostic Repair Verification Diagnostic Repair Verification after completing the diagnostic procedure.


* Ignition Coil(s) Replacement Service and Repair
* Control Module References Control Module References for engine control module replacement, setup, and programming