The ECM provides ground to one side of the coil in the fuel pump relay to control the fuel pump relay. The other side of the fuel pump relay coil is connected to fuel pump relay, which activates when the ignition switch is ON. The ECM monitors the control circuit between the fuel pump relay and the ECM. When the ignition switch is turned ON, the ECM energizes the fuel pump relay, which sends power to the fuel pump.
ECM sets DTC P0230 if the ECM detects the fuel pump relay control circuit is open, shorted to ground or battery.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Check open or short to ground/battery in control circuit | ● Open or short in harness ● Contact resistance in connectors ● Faulty relay |
Enable Conditions | ● Battery voltage〉10V | |
Threshold Value | ● Short to ground, line break or short to battery | |
Diagnostic Time | ● 1.5 sec |
