P1351

Diagnostic Chart:

Wiring Diagram:

The PCM controls dwell and spark timing during all engine running conditions. The electronic ignition module (EI) charges the coil pack when the PCM supplies five volts to the 1/4 coil. The coil will then discharge or fire through its secondary coil towers whenever the voltage supply has been turned Off by the PCM.

DTC PARAMETERS
During cranking the PCM pulses the ignition control (IC) circuit high and low. The PCM monitors the diagnostic feedback circuit to diagnose circuit faults.

DTC P0351 will set if there is an open, short to voltage or short to ground in IC 1 and 4 (circuit 423);

or

DTC P0351 and P1351 will set if there is a short to voltage in IC 1 and 4 (circuit 423) when the engine is in cranking mode.

IMPORTANT: IC circuit 1 and 4 is checked continuously whenever crankshaft position sensor
pulses are received by the PCM during cranking mode only.

DIAGNOSTIC AIDS
The IC circuit 1 and 4 consists of an ignition module, circuit 423 and the PCM.
^ A malfunctioning 1 and 4 coil, 1 and 4 secondary wire or 1 or 4 spark plug will not cause a P0351 and/or P1351 to set.
^ A blown EIS fuse will cause a no start condition but a IC 1 and 4 DTC may not set.
^ An IC 1 and 4 circuit fault may set a cam missing code DTC P0340.
^ If engine starts with a fault on the IC circuit a misfire (DTC P0300) may also be set.

IMPORTANT: If there is an open in the IC 1 and 4 circuit a misfire on those cylinders will occur.