Transfer Fuel Pump, Checking

Transfer Fuel Pump, Checking

Recommended Special Tools, Workshop Equipment, Testers, Measuring Instruments and Auxiliary Items
- V.A.G 1348/3A remote control with V.A.G 1348/3-2 adapter cable
- Portable multimeter V.A.G 1526 or V.A.G 1526 A
- Test adapter kit V.A.G 1594 A

NOTE:
- Battery voltage at least 12 V
- Fuse (on fuse panel) -S228- OK (position 28)







- Relay 4 in micro-central electronics (in drivers footwell, left) OK
- Fuel filter OK
- Ignition switched off.

Test Sequence
- Open cover of fuse box at left side of instrument cluster.
- Remove Fuse (on fuse panel) -S228- at fuse carrier (position 28) (left row, 5th large fuse from top).







- Connect remote control connection(V.A.G 1348/3A using adapter cable V.A.G 1348/3-2 ) to right terminal of Fuse (on fuse panel) - S228- socket - arrow -.
- Connect alligator clip to vehicle battery B+.
- Press the button of the remote control.
- Flowing noise of pump must be audible

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

If no operating noise can be heard:
- Remove rear seat bench.
- Remove right cover under rear seat bench.

Vehicles with Front Wheel Drive







- Carefully release and disconnect 4-pin electrical connection - arrow -.

Vehicles with All Wheel Drive







- Carefully release and disconnect 4-pin electrical connection - arrow -.

All Vehicles







- Connect multimeter between terminal 1 and 4 of harness connector for voltage measurement.
- Press the button of the remote control.
- Specification: approx. battery voltage

If the specification is not obtained:
- Determine and eliminate open circuit according to wiring diagram

If specified value is obtained, although no running-noise can be heard at pump:
- Fuel delivery unit, removing.
- Check if the electrical wiring between the flange and fuel pump is connected and has continuity.

If no fault is detected in the wiring:
- Fuel pump faulty, replace fuel delivery unit.
- Erase DTC memory of ECM. Diagnostic Mode 04 - Erase DTC Memory
- Generate readiness code. Generate Readiness Code