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, short to ground or battery.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Electrical check
? Open or short in harness
? Poor connection or damaged harness
? Faulty fuel pump relay
Enable Conditions
? 10V < Battery voltage < 16V
Threshold Value
? Open or short circuit
Diagnostic Time
? 1.5sec.