Chart A2-7A, Fuel System Diagnosis (Circuit Opening Relay Check): Notes

When ignition switch is turned to START position, circuit opening relay will be energized to allow fuel pump to operate to pressurize system. Fuel pump will continue to operate if PCM receives an ignition signal when engine starts. Fuel pump operates as long as circuit opening relay is energized by PCM. When circuit opening relay is de-energized, fuel pump will stop operating.

1. Checks for normal fuel pump operation.
2. Checks if fuel pump will run when DLC terminals B+ and FP are jumpered together.
3. Checks fuel pump operation while ignition signal is present at PCM.
4. Checks for an open in Black/Red wire to circuit opening relay.
5. Checks for an open in Black/Red wire to DLC.
6. Checks for an open Blue/Black or Green/Red wire, a faulty PCM, or a faulty circuit opening relay.
7. Checks for open White/Black or Blue/Black wire, or faulty fuel pump.