The PCM 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 PCM monitors the control circuit between the fuel pump relay and the PCM. When the ignition switch is turned ON, the PCM energizes the fuel pump relay, which sends power to the fuel pump.
PCM sets DTC P0230 if the PCM 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
1.5 sec.
Mil On Condition
-