Fuel Pump Electrical, Testing

Fuel Pump Electrical, Testing

Special tools, testers and auxiliary items required

• Multimeter.

• Electrical connector test lead set.

Test conditions

• Battery voltage 12.5 V.

• Fuse 47 in Fuse Panel C is OK.

• 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 lead to the chassis ground.

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- 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 voltage supply from the J17 Fuel Pump relay.

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 Battery Positive

- Voltage should be within 1.0 volt 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.

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.