P0357
DTC P0357
CIRCUIT DESCRIPTION
The ignition system uses individual ignition coil/module assemblies for each cylinder. The engine control module (ECM) controls the individual coils by transmitting timing pulses on the ignition control (IC) circuit of each ignition coil/module to enable a spark event. The ECM monitors each IC circuit for improper voltage levels. Each ignition coil/module has the following circuits:
- An ignition voltage circuit
- A ground
- An IC circuit
- A low reference circuit
If the ECM detects a failure on the IC circuit of the ignition coil/module, it will set one of the corresponding DTCs, DTC P0351 through P0358.
DTC DESCRIPTORS
This diagnostic procedure supports the following DTCs:
- DTC P0351 Ignition Coil 1 Control Circuit
- DTC P0352 Ignition Coil 2 Control Circuit
- DTC P0353 Ignition Coil 3 Control Circuit
- DTC P0354 Ignition Coil 4 Control Circuit
- DTC P0355 Ignition Coil 5 Control Circuit
- DTC P0356 Ignition Coil 6 Control Circuit
- DTC P0357 Ignition Coil 7 Control Circuit
- DTC P0358 Ignition Coil 8 Control Circuit
CONDITIONS FOR RUNNING THE DTC
- The engine is cranking or running.
- DTCs P0351-P0358 will set when 50 out of 63 engine cycles show the failure conditions. The time duration varies with engine speed. This test runs continuously.
CONDITIONS FOR SETTING THE DTC
The ECM detects one of the following failures on the IC circuit:
- An open
- A short to ground
- A short to voltage
ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.
TEST
