Fuel Pump Electrical, Testing

Fuel Pump Electrical, Testing

Special tools, testers and auxiliary items required

• Hand held remote control (jumper).

• Multimeter.

• Electrical connector test lead set.

Test conditions

• Battery voltage min. 12.5 V.

• Fuel filter OK.

• Fuse (SC31) OK.

• Fuel Pump (FP) Relay (J17) O.K

• Fuel Pump (FP) Control Module (J538) OK.

• Fuel tank at least 1/4 filled.

• Ignition switched off.

Test procedure

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

Start diagnosis

- Remove the carpet from the luggage compartment floor.

- Remove the screws- arrows - and the right locking flange.





- Disconnect the fuel delivery unit electrical harness connector - 2 -.





- Crank the engine.

- Using a multimeter, Check the fuel delivery unit electrical harness connector terminal - 1 - for voltage.

- Switch the ignition off.

Specified value: Battery voltage.

If the specified value was not obtained:

- Check the fuel delivery unit electrical harness connector terminal 1 to the Fuel Pump (FP) Control Module (J538) electrical harness connector terminal 1 for an open circuit, short to Battery (+), or Ground (GND).

- Check the electrical harness connector for damage, corrosion, lose or broken terminals.

- If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring:

- Using a multimeter, Check the fuel delivery unit electrical harness connector terminal - 2 - to the Fuel Pump (FP) Control Module (J538) electrical harness connector terminal 7 for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained:

- Check the fuel delivery unit electrical harness connector terminal 2 to the Fuel Pump (FP) Control Module (J538) electrical harness connector terminal 7 for an open circuit, short to Battery (+).

- Check the electrical harness connector for damage, corrosion, lose or broken terminals.

- If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring:

- Connect a Hand held remote control (jumper) to terminal - 1 - of the fuel delivery unit and to vehicle battery (+).

- Connect a jumper cable from a Electrical connector test lead set to terminal - 4 - of the fuel delivery unit and to vehicle Ground (GND).





- Press the Hand held remote control (jumper) switch in.

• The Fuel Pump (FP) runs quietly. Avoid surrounding noises while testing the fuel pump.

The fuel pump should operate and an audible noise heard.

If no operating noise is heard:

- Remove the fuel delivery unit.





- Using a Multimeter, check the fuel delivery unit electrical terminals 1 to 4 for continuity.

Specified value: 0 ohms.

If the specified value is not obtained:

- Check the fuel delivery unit for damage, corrosion, lose or broken terminals.

- Check the fuel delivery unit for an open circuit, short to Ground (GND), or short to Battery (+).

- Repair the electrical circuit as necessary.

If no malfunction is detected in electrical circuit, replace the fuel delivery unit.

Assembly is performed in the reverse order of removal.