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.
- FuseS132OK.
- FuseS134OK.
- Fuel Pump (FP) Relay J17 OK.
- Fuel filter OK.
- Ignition switched off.

Test procedure
- Perform a preliminary check to verify the customers complaint. General Diagnosis

Start diagnosis

TT Coupe
- Remove the rear seat bench.

TT Roadster
- Remove the right rear side trim panel.

All vehicles







- Remove the cover retainers - arrows - from the right sealing flange.







- Press both latches in direction of - arrow - and remove the engine compartment E-box cover.







- Remove Fuse SB1 from "fuse carrier ST2" - 2 -.







- Connect a Hand held remote control (jumper) to the terminal on Fuse SB1 and to battery "+".
- Press the switch on the Hand held remote control (jumper).

NOTE: 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.







- Using a Multimeter, check the Transfer Fuel Pump (FP) G6 electrical connector 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 Transfer Fuel Pump (FP) G6.

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) Relay J17 socket 23/87 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 5 to the Ground (GND) connection on right lower A-pillar 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 Ground (GND) connection on right lower A- pillar 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) Relay J17.
- 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
2. If necessary, erase the DTC memory. Diagnostic Mode 04 - Erase DTC Memory
3. If the DTC memory was erased, generate readiness code.

End of diagnosis