P0230
CIRCUIT DESCRIPTIONThe control module enables the fuel pump relay when the ignition switch is turned ON. The control module will disable the fuel pump relay within two seconds unless the control module detects ignition reference pulses. The control module continues to enable the fuel pump relay as long as ignition reference pulses are detected. The control module disables the fuel pump relay within two seconds if ignition reference pulses cease to be detected and the ignition remains ON.
The control module monitors the voltage on the fuel pump relay control circuit. If the control module detects as incorrect voltage on the fuel pump relay control circuit, a fuel pump relay control DTC sets.
CONDITIONS FOR RUNNING THE DTC
- The ignition is ON.
- The system voltage is between 8-16 volts.
CONDITIONS FOR SETTING THE DTC
- The PCM detects an incorrect voltage on the control circuit of the fuel pump relay.
- The condition exists for 10 seconds.
ACTION TAKEN WHEN THE DTC SETS
- The control module stores the DTC information into memory when the diagnostic runs and fails.
- The malfunction indicator lamp (MIL) will not illuminate.
- The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.
- The driver information center, if equipped, may display a message.
CONDITIONS FOR CLEARING THE DTC
- 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 non-emission related diagnostic.
- Clear the DTC with a scan tool.
TEST DESCRIPTION
Steps 1-2:
Steps 3-7:
Steps 8-15:
The numbers below refer to the step numbers on the diagnostic table.
4. This step verifies that the PCM is providing voltage to the fuel pump relay.
5. This step tests for an open in the ground circuit to the fuel pump relay.
6. This step tests if voltage is constantly being applied to the control circuit of the fuel pump relay.