Volt

DTC P0351-P0354

Ignition voltage is supplied to the ignition coil. The engine control module (ECM) provides an ground for the ignition coil 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 ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 5 s.

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

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

If the condition is intermittent, moving the related harnesses and connectors, with the engine running, while monitoring the appropriate scan tool Misfire Current Cylinder parameter and the appropriate Ignition Coil Control Circuit Status parameter this may help isolate the condition.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. Start the engine.
2. Observe the scan tool Cylinder 1-4 Current Misfire Counter parameters. The counters should not be incrementing.
3. Observe the appropriate Ignition Coil Control Circuit Status parameter should read OK.
4. 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.

1. Vehicle OFF, disconnect the harness connector at the K35 ignition coil module.
2. Vehicle in Service Mode, verify that a test lamp does not illuminate between the appropriate control circuit listed below and ground.

•	Ignition coil 1 control terminal D

•	Ignition coil 2 control terminal E

•	Ignition coil 3 control terminal F

•	Ignition coil 4 control terminal G

⇒	If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

3. Verify that a test lamp does not illuminate between the appropriate control circuit listed below and B+.

•	Ignition coil 1 control terminal D

•	Ignition coil 2 control terminal E

•	Ignition coil 3 control terminal F

•	Ignition coil 4 control terminal G

⇒	If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the K20 ECM.

4. Vehicle OFF, all systems OFF. This may take up to 2 minutes for all vehicle systems to power down.
5. Connect a 3 A fused jumper wire to the appropriate control circuit listed below and ground.

•	Ignition coil 1 control terminal D

•	Ignition coil 2 control terminal E

•	Ignition coil 3 control terminal F

•	Ignition coil 4 control terminal G

Note: This procedure needs to be performed quickly because once DTC P0AB9 or P16E0 sets, the engine will not turn over. If this occurs, turn the Vehicle OFF, all systems OFF. This may take up to 2 minutes for all vehicle systems to power down and then retest.

6. Attempt to start the engine, observe the appropriate Ignition Coil 1-4 Control Circuit Low Voltage Test Status parameter with a scan tool. The parameter should display Malfunction.

⇒	If not the specified value, test the control circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.

7. If all circuits test normal, test or replace the K35 ignition coil module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.