P0356
DTC P0356CIRCUIT DESCRIPTION
The ignition system uses individual ignition coil/module assemblies for each cylinder. The powertrain control module (PCM) controls the individual coils by transmining timing pulses on the ignition control (IC) circuit of each ignition coil/module to enable a spark event. The PCM 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 PCM detects a failure on the IC circuit of the ignition coil/module, it will set 1 of the corresponding DTCs:
- DTC P0351 for ignition coil/module 1
- DTC P0352 for ignition coil/module 2
- DTC P0353 for ignition coil/module 3
- DTC P0354 for ignition coil/module 4
- DTC P0355 for ignition coil/module 5
- DTC P0356 for ignition coil/module 6
- DTC P0357 for ignition coil/module 7
- DTC P0358 for ignition coil/module 8
CONDITIONS FOR RUNNING THE DTC
The ignition is ON.
CONDITIONS FOR SETTING THE DTC
The PCM detects one of the following failures on the IC circuit for less than 1 second:
- 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
