P0352

DTC P0352

DTC DESCRIPTORS

DTC P0351
Ignition Coil 1 and 4 Control Circuit

DTC P0352
Ignition Coil 2 and 3 Control Circuit

DIAGNOSTIC FAULT INFORMATION






IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Testing and Inspection

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 or short to ground or 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.

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 List.

CIRCUIT/SYSTEM TESTING
1. Ignition OFF, disconnect the harness connector of the ignition coil.
2. Connect a test lamp between the ignition 1 voltage circuit of the ignition coil and the negative terminal of the battery.

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

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.
4. Connect a DMM between the appropriate ignition control circuit and the negative terminal of the battery.

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

5. While cranking the engine, test for more than 3 hertz between the appropriate ignition control circuit and the negative terminal of the battery.
- If less than 3 hertz, 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 after completing the diagnostic procedure. Verification Tests