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 main 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.
Checking fuel pump relay circuit continuously under detecting condition, if open or short in the circuit is detected ECM sets P0230.
※ In addition, Take note that open circuit in Main Relay may cause this P0230 code.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Signal Low or High | 1. Poor connection 2. Open or short in fuel pump relay circuit 3. Open in Main Relay circuit 4. Fuel Pump Relay 5. ECM |
Enable Conditions |
•
11V ≤ Battery Voltage ≤ 16V | |
Threshold value |
•
Open or short | |
Diagnosis Time |
•
Continuous (more than 5 sec. failure for every 10 sec.test) | |
MIL On Condition |
•
NO MIL ON(DTC only) |
