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.
If there is Open in fuel pump circuit, ECM sets DTC P0230.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Circuit continuity check, open | 1. Poor connection 2. Open or short to ground in power circuit 3. Open in control circuit 4. Fuel pump relay |
Enable Conditions |
•
Engine speed >240
•
Battery voltage = 10.7~16V | |
Threshold Value |
•
Disconnected
•
Short circuit to battery
•
Short circuit to GND | |
Diagnostic Time |
•
Continuous | |
MIL ON Condition |
•
DTC only |
Item | Specification |
Coil Resistance (Ω) | 70 ~ 120 |
