P1359

CIRCUIT DESCRIPTION
There are two separate ignition module assemblies, one for each bank of cylinders. Each assembly contains an ignition control (IC) module and four ignition coils. Each IC module consists of the following circuits:
- The ignition 1 voltage
- The ground
- The IC timing low reference
- The IC control circuits for cylinders 1 through 8

Each ignition coil connects directly to its spark plug via a short boot. The IC control circuits transmit timing pulses from the powertrain control module (PCM) to the IC modules, which triggers the coils to fire the plugs in the correct sequence. The PCM monitors each IC control circuit for improper voltage levels. If an open or a short to voltage occurs in the IC control circuit group for the #1, #4, #6, and #7 cylinder, DTC P1360 sets.

CONDITIONS FOR RUNNING THE DTC
The ignition is ON.

CONDITIONS FOR SETTING THE DTC
- During PCM power-up, the PCM detects an open condition in the IC circuit group for the #1, #4, #6, and #7 cylinders.
- The PCM detects a short to voltage condition in the IC control circuit group for the #1, #4, #6, and #7 cylinders
- The condition is present for less than 1 second.

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.

DIAGNOSTIC AIDS
- The Misfire Current Cylinder counter normally displays a small amount of activity, typically 0-10 counts. However, the display should not increment steadily. If the Misfire Current Cylinder increments steadily for a single cylinder, the condition is isolated to the IC control circuit for the specific cylinder. If the Misfire Current Cylinder numbers increment randomly, the condition may be due to poor connections at the PCM, or due to a faulty PCM.
- If the condition is intermittent, refer to Intermittent Conditions. Intermittent Conditions

TEST

Steps 1-3:

Steps 4-8:

Steps 9-13:

Steps 14-17:

Steps 18-23:

Steps 24-25: