Transfer Fuel Pump, Electrical Checking

Transfer Fuel Pump, Electrical Checking

Special tools, testers and auxiliary items required

• Hand held remote control (jumper).

• Multimeter.

• Electrical connector test lead set.

Test conditions

• Battery voltage 12.5 V.

• Fuse (S228) OK.

• Motronic Engine Control Module (ECM) Power Supply Relay (J271) OK.

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

• Fuel filter OK.

• Ignition switched off.

Test sequence

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

- Remove the left locking flange cover- arrows -.





- Disconnect the Transfer Fuel Pump (FP) (G6) electrical harness connector - arrow -.





- Connect a Hand held remote control (jumper) to terminal - 1 - of the Transfer Fuel Pump (FP) (G6) and to vehicle battery (+).





- Connect a jumper cable from a Electrical connector test lead set to terminal - 4 - of the Transfer Fuel Pump (FP) (G6) and to vehicle Ground (GND).

- Press the 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 Transfer Fuel Pump (FP) (G6).

If no operating noise is heard:

- Remove the fuel delivery unit. Refer to Fuel Supply System Repair Information.

- Using a Multimeter, check the Transfer Fuel Pump (FP) (G6) electrical terminals 1 to 4 for continuity.





Specified value: 0 ohms.

If the specification was not obtained:

- Check the Transfer Fuel Pump (FP) (G6) electrical harness connector terminal 1 to 4 for a short circuit to Battery positive (+) or an open circuit.

- If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring and the resistance value was not OK:

- Replace the fuel pump. Refer to Fuel Supply System Repair Information.

If no malfunction is detected in the wiring and the resistance value was OK:

If an operating noise is heard:

Checking voltage

- Switch the ignition on.

- Using a Multimeter, check the Transfer Fuel Pump (FP) (G6) electrical harness connector terminal 1 to Ground (GND) for voltage.

- Switch the ignition off.

Specified value: Battery voltage.

If the specification was not obtained:

- Check the Transfer Fuel Pump (FP) (G6) electrical harness connector terminal 1 to the Fuel Pump (FP) Control Module (J538) electrical harness connector terminal 1 for an open circuit, or a short circuit to Battery positive (+) or Ground (GND).

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

- If necessary, repair the faulty wiring connection.

If the specification was obtained:

Checking Ground (GND)

- Using a Multimeter, check the Transfer Fuel Pump (FP) (G6) electrical harness connector terminal 4 to the Fuel Pump (FP) Control Module (J538) electrical harness connector terminal 2 for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained:

- Check the Transfer Fuel Pump (FP) (G6) electrical harness connector terminal 4 to the Fuel Pump (FP) Control Module (J538) electrical harness connector terminal 2 for an open circuit, or a short circuit to Battery positive (+) or Ground (GND).

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

- If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring:

- Replace the Fuel Pump (FP) Control Module (J538 ). Refer to Fuel Supply System Repair Information.

- Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory. => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Mode 03 - Read DTC Memory.

2. If necessary, erase the DTC memory. => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.

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

End of diagnosis