Checking voltage supply Audi S8 D3 facelift

Checking voltage supply

1. Remove cover of right luggage compartment side trim - arrows -.

Vehicles of model year 2003

1. Pull out fuse 10 on fuse panel SF10 (in relay and fuse panel in right of luggage compartment, Socket 10).

Vehicles as of model year 2004

1. Pull out fuse 2 on fuse panel SF2 (in relay and fuse panel in right of luggage compartment, Socket 2).

Scheme 47

All

1. Connect Remote Control V.A.G 1348/3A with Adapter Cable V.A.G 1348/3-2 to right socket terminal of removed fuse.
2. Connect alligator clip on Remote Control V.A.G 1348/3A to battery "+".
3. Press switch on remote control.

1. Operating noise of pump must be audible in vicinity of fuel tank.

Note. Fuel Pump (FP) runs quietly. Avoid surrounding noises while testing the fuel pump. If necessary, use a second technician to check.

If no operating noise can be heard

1. Remove trim for luggage compartment floor.
2. Remove cover for left locking flange - arrows -.

Scheme 48

1. Disconnect electrical harness connector - 2 - at left locking flange.

Note. Ignore - 1 -.

Scheme 49

1. Connect multimeter between terminal - 1 - and - 4 - of electrical harness connector for voltage measurement.
2. Press switch on remote control.

1. Specified value: approx. battery voltage.

If specification is not obtained

1. Repair wire connection according to wiring diagram.

Scheme 50

If specified value is obtained, although no running-noise can be heard at pump

1. Remove left fuel delivery unit --> «Left fuel delivery unit with Transfer Fuel Pump (FP) G6 , removing and installing»(ref-289201-S15723393932008062700000) .
2. Check if electrical wiring between flange and fuel pump is connected and has continuity.

If no fault is detected in wiring

1. Fuel pump faulty. Replace left fuel delivery unit.
2. Install left fuel delivery unit --> «Installing»(ref-289201-S09780259762008071700000) .