P0230

CIRCUIT DESCRIPTION
The Powertrain Control Module (PCM) provides ignition positive voltage to the coil side of the fuel pump relay. When the ignition switch is first turned ON, the PCM energizes the fuel pump relay, which applies power to the fuel pump. The PCM enables the fuel pump relay as long as the engine is cranking or running, and crankshaft reference pulses are received. If no crankshaft reference pulses are received, the PCM de-energizes the fuel pump relay after 2 seconds. The PCM monitors the voltage on the fuel pump relay control circuit. If the PCM detects an incorrect voltage on the fuel pump relay control circuit, DTC P0230 sets.

CONDITIONS FOR RUNNING THE DTC
The ignition is ON.

CONDITIONS FOR SETTING THE DTC
^ The PCM detects an incorrect voltage on the control circuit of the fuel pump relay.
^ The condition exists for 0.5 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The MIL does not turn ON.
^ A DTC is stored in memory under history DTC.
^ The Failure Records are stored.
^ The Failure Records are updated after the first failure of each ignition cycle.
^ Some type C DTCs may also cause an auxiliary service lamp to be illuminated, and/or display a message to the vehicle operator.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The history DTC will clear if the fault conditions have not been detected for 40 warm-up cycles.
^ A scan tool can be used to clear DTC information.

TEST DESCRIPTION

Steps 1-6:

Steps 7-15:

The numbers below refer to the step numbers on the diagnostic table.
2. Listen for an audible click when the fuel pump relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
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.