Fuel Pump Circuit

FUEL PUMP CIRCUIT





1. Check operating sound of Fuel Pump.
- Make sure that Fuel Pump is in operation for two seconds when turning Ignition Switch to "ON".

2. Check ground circuit of Fuel Pump.
a. Turn Ignition Switch to "OFF".
b. Disconnect connector from Fuel Pump.





c. Measure resistance of harness connector between Fuel Pump and body.

Connector & Terminal/ Specified Resistance:
(R38) No. 3 - Body / 10 Ohms, maximum

3. Check power supply to Fuel Pump.
a. Turn Ignition Switch to "ON".





b. Measure voltage of power supply circuit between Fuel Pump connector and body.

Connector & Terminal/ Specified Voltage:
(R38) No. 1 - Body / 10 Volts, minimum

4. Check harness connector between Fuel Pump and Fuel Pump Relay.
a. Turn Ignition Switch to "OFF".





b. Measure resistance of harness connector between Fuel Pump and Fuel Pump relay.

Connector & Terminal/ Specified Resistance:
(R38) No. 1 - (B41) No. 4 / 10 Ohms, maximum

5. Check Fuel Pump Relay.
a. Disconnect connectors from Fuel Pump relay and Main Relay .
b. Remove Fuel Pump relay and Main Relay with bracket.
c. Connect Battery to Fuel Pump relay connector terminals No. 1 and No. 3.





d. Measure resistance between connector terminals of Fuel Pump relay.

Terminals / Specified Resistance:
No. 2 - No. 4 / 10 Ohms, maximum

6. Check harness connector between Engine Control Module (ECM) and Fuel Pump Relay.
a. Disconnect connectors from ECM.





b. Measure resistance of harness connector between ECM and Fuel Pump relay.

Connector & Terminal / Specified Resistance:
(E29) No. 8 - (B41) No. 3 / 10 Ohms, maximum