Fuel Pump Relay: Testing and Inspection

Fuel Pump Voltage Supply, Checking

Special tools, testers and auxiliary items required

• Multimeter.

• Electrical connector test lead set.

Test conditions

• Battery voltage 12.5 V.

• Fuel pump fuse is OK. Refer to Wiring Diagrams for fuse identification.

• Fuel filter OK.

• Ignition switched OFF.

Test procedure

- Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] Preliminary Check

Start diagnosis

- Remove rear seat bench. Refer to the Repair Information.

Test procedure for Fuel Delivery Unit

- Remove the floor sealing cover to access the Fuel Delivery Unit (fuel pump).

- Disconnect the harness connector from the Fuel Delivery Unit.

- Connect the multimeter positive lead to terminal 1 of the Fuel Delivery Unit harness connector.

- Connect the multimeter ground to the Battery Negative terminal or clean body ground.

-

- Crank the engine and note voltage displayed on multimeter during crank. Voltage should be within 2.5 volts of battery voltage.

Turn the ignition switch OFF.

If voltage is below specification:

- Check voltage supply from the Fuel Pump relay (J17).

If voltage is within specification :

- Connect the multimeter ground lead to terminal 5 of the Fuel Delivery Unit harness connector.

- Connect the multimeter positive lead to terminal 1

- Crank the engine and note voltage displayed on multimeter during crank. Voltage should be within 2.0 volts of battery voltage.

Turn the ignition switch OFF.

If voltage is below specification:

- Check for open ground circuit or poor ground connection. Repair as necessary. Refer to Wiring Diagrams for pin locations.

If voltage is within specification :

- Replace the Fuel Delivery Unit (Fuel Pump). Refer to the Repair Information

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Modes 01 - 09.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Modes 01 - 09.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.