Fuel Pump, Right, Checking Electrical

MPI Engines


Fuel Pump, Right, Checking Electrical

Special tools, testers and auxiliary items required

• Remote Control Connection (V.A.G 1348/3A)

• Hand-Held Multimeter (V.A.G 1526D)

• Connector Test Set (V.A.G 1594C)

• Vehicle Diagnosis, Testing and Information System (VAS 5051B) with Inductive Pickup (100A) (VAS 5051B/7)

Procedure

• Battery voltage min. 12.5 V

• Fuse - 31 - on fuse holder SC31 (right side instrument panel) OK





• Fuel Pump Relay (J17) OK (on the relay and fuse panel in right front footwell), Socket - 4 -.





• Fuel filter OK.

• Ignition switched off.

Checking voltage supply

- Pry off the right cover on the instrument panel, using a screwdriver - arrow -.





- Pull out fuse 31 on fuse panel SC31 (right instrument panel, middle row, first large fuse from top).





- Connect Remote Control (V.A.G 1348/3A) with Adapter Cable (V.A.G 1348/3-2) to the left socket terminal of fuse SC31.

- Connect alligator clip on Remote Control (V.A.G 1348/3A) to battery "+".

- Press the switch on the remote control.

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

• 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:

- Remove the luggage compartment floor mat.

- Unbolt cover for right locking flange - arrows -.





- Disconnect electrical harness connector - 2 - at right locking flange.





• Ignore - 1 -.

- Connect multimeter between terminal - 1 - and - 4 - of electrical harness connector for voltage measurement.





- Press the switch on the remote control.

• Specified value: approximately battery voltage.

If the specification is not obtained:

- Repair the wiring harness according to the wiring diagram.

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





- Remove right fuel delivery unit. Refer to => [ Right Fuel Delivery Unit with Fuel Pump ] MPI Engines.

- 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 right fuel delivery unit.

- Install right fuel delivery unit. Refer to => [ Right Fuel Delivery Unit with Fuel Pump and Fuel Gauge Assembly Overview ] MPI Engines Overview.

Current Draw, Checking

• Fuel pump voltage supply OK

- Pull out fuse 31 on fuse panel SC31 (right instrument panel, middle row, first large fuse from top).

- Connect Remote Control (V.A.G 1348/3A) with Adapter Cable (V.A.G 1348/3-2) to the left socket terminal of fuse SC31.





- Connect alligator clip on Remote Control (V.A.G 1348/3A) to battery "+".

- Connect Vehicle Diagnosis, Testing and Information System (VAS 5051B) with 100A inductive pickup (VAS 5051B/7) to wire of remote control.

- Press the switch on the remote control.

- Measure current draw of fuel pump.

• Specified value: approximately 8 A

If the specification is not obtained:

• At a displayed current draw of 4 A, Fuel Pump (FP) runs dry.