Ignition voltage is supplied to the ignition coil. The engine control module (ECM) provides a 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 00, P0352 00, P0353 00 and P0354 00 are Type B DTCs.

DTCs P0351 00, P0352 00, P0353 00 and P0354 00 are Type B DTCs.

The following conditions can also set the DTC:

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 diagnostic tester information

1. Start and idle the engine.
2. Observe the scan tool Cylinder 1 Current Misfire Counter, Cylinder 2 Current Misfire Counter, Cylinder 3 Current Misfire Counter and Cylinder 4 Current Misfire Counter parameters. The counters should not be incrementing.
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 you observed from the freeze frame/failure records data.

1. Ignition OFF, disconnect the harness connector at the T8 Ignition Coil.
2. Test for less than 5 Ω between the ground circuit terminal B and ground

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

3. Ignition OFF for 1 min, test for less than 5 Ω between the low reference circuit terminal C 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 K20 Engine Control Module (ECM).

4. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal A and ground.

⇒	If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition voltage circuit fuse F9 is open, test all components connected to the ignition voltage circuit and replace as necessary.

Note: Set the DMM to the DC Hertz scale for this test.

5. Connect a DMM between the appropriate ignition 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

6. Engine cranking, test for greater than 1.5 hertz between each of 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 K20 Engine Control Module (ECM).

7. If all circuits test normal, test or replace the T8 Ignition Coil.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.