Transfer Fuel Pump, Checking

Transfer Fuel Pump, Checking

• Models with an airbag are installed with a crash fuel shut-off system. It reduces the danger of a fire in a crash as the fuel pump is switched off via the fuel pump relay.

• When the door is opened the fuel pump is activated for 2 seconds to build up the pressure in the fuel system.

Special tools, testers and auxiliary items required

• Hand held remote control (jumper).

• Multimeter.

• Electrical connector test lead set.

Test conditions

• Battery voltage at least 12.5 volts.

• Fuel Pump (FP) Relay (J17) OK.

• Fuel filter OK.

• Ignition switched off.

Test procedure

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

Test sequence

- Remove the rear seat bench. Refer to the appropriate service information.

- Remove cover retainers from the right sealing flange.

- Disconnect the electrical harness connector from the Transfer Fuel Pump (FP) (G6) fuel delivery unit.

- Connect a hand-held remote control (jumper) to terminal 5 of the fuel delivery unit and to vehicle battery (+).

- Connect a jumper cable from an Electrical connector test lead set to terminal 1 of the fuel delivery unit and to vehicle Ground (GND).





- Press switch on the hand-held remote control (jumper).

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

- Listen for an operating noise from the fuel pump.

If no operating noise is heard:

- Remove the fuel delivery unit.

- Using a multimeter, check the electrical circuit between terminals 1 to and 5 of the fuel delivery unit pump motor for resistance.





Specified value: 1.5 ohms max.

If the specification was not obtained:

- Check the wiring for an open circuit, a short circuit to Battery positive (+) or to Ground (GND).

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

- If necessary, repair the wiring connection.

If the specification was obtained:

- Replace the fuel delivery unit.

Final procedures

After 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.