P0005

DTC P0005

CIRCUIT DESCRIPTION
An ignition voltage is supplied to the high pressure lock-off (HPL) solenoid through the AF lock-off relay. The AF lock-Off relay is energized when the ignition is ON. The powertrain control module (PCM) controls the HPL solenoid by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the controlled component. The PCM monitors the status of the driver. If the PCM detects an incorrect voltage for the commanded state of the driver, DTC P0005 sets.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0005 High Pressure Fuel Shutoff Solenoid Control Circuit

CONDITIONS FOR RUNNING THE DTC
- The engine speed is more than 400 RPM.
- The ignition voltage is between 6-18 volts.

CONDITIONS FOR SETTING THE DTC
- The control module detects that the commanded state of the driver and the actual state of the control circuit do not match.
- The above condition exists for at least 1 second.

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

Step 1 - Step 13:

Step 14 - Step 15:

The numbers below refer to the step numbers on the diagnostic table.
2. This step tests if the concern is active. You should hear a clicking sound when the HPL solenoid is commanded ON and OFF. Repeat the commands as necessary.
4. The AF lock-off relay also supplies voltage to the low pressure lock-off (LPL) solenoid. An open circuit between the AF lock-off relay and the splice will cause P2665 to also set.
5. This step verifies that the control module is providing ground to the HPL solenoid.
6. This step tests if a ground is constantly being applied to the HPL solenoid.