P0611

DTC P0611

Circuit Description

The fuel injector control module (FICM) monitors the fuel rail pressure (FRP) sensor voltage, and the fuel rail temperature (FRT) sensor voltage. The FRP and FRT sensor values, and diagnostic data, is communicated to the powertrain control module (PCM) by 3 pulse width modulated (PWM) circuits. This DTC sets when the PCM does not receive any PWM signals from the FICM.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The powertrain control module (PCM) detects an incorrect PWM signal on the FICM diagnostic output circuit.

Action Taken When the DTC Sets

- The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The control module switches over to gasoline fuel operation.
- The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/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 Description

The number below refers to the step number on the diagnostic table.

2. This step verifies that the condition is active.
3. This step verifies that the ignition voltage circuit to the FICM is OK. If the ignition voltage circuit is open, DTCs P1207, P1208, and P1209 may also be set.