The fuel pump relay is located next to the current supply relay in
a plastic box on the left side of the engine compartment.
- Check terminal No. 30 and terminal No. 86 of fuel pump relay for battery
voltage. If battery voltage is not present, check circuit for short
or open circuit.
- If battery voltage is present, remove relay and attach ohmmeter probe
to relay box terminal No. 85. Attach other probe to ground. Continuity
should be present while cranking engine.
- If continuity is not present, check for continuity between terminal
No. 85 of fuel pump relay and terminal No. 3 of ECU connector. If continuity
is present, circuit is okay but ECU is not switching to ground. Replace
ECU and install fuel pump relay.
- If fuel pump will not operate, turn ignition switch off, then on.
Ensure battery voltage is present at fuel pump relay No. 87 for about
5 seconds after ignition is switched on. If battery voltage is not present,
replace fuel pump relay. If battery voltage is present, check voltage
supply and ground circuit of fuel pump. If fuel pump wiring is okay,
replace fuel pump.
Fuel Pump Relay Circuit Schematic