P0612
DTC P0612
CIRCUIT DESCRIPTION
The engine control module (ECM) monitors the condition of the ignition relay control circuit. If the ECM senses excessive voltage on this circuit, DTC P0612 will set.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0612 Fuel Injector Control Module (FICM) Relay Control Circuit
CONDITIONS FOR RUNNING THE DTC
The ignition is ON.
DTC P0612 runs continuously once the above condition is met.
CONDITIONS FOR SETTING THE DTC
The feedback voltage does not match the output state for more 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
If the engine starts, the ignition relay control circuit is shorted to power intermittently.
TEST
