Electric Transfer Fuel Pump, Checking

Electric Transfer Fuel Pump, Checking

Special tools, testers and auxiliary items required

• Remote Control (V.A.G 1348/3A) with Adapter Cable (V.A.G 1348/3-3)

• Multimeter (V.A.G 1526E)

• Connector Test Set (V.A.G 1594C)

Procedure

Observe test conditions. Refer to => [ Test Conditions ] Initial Inspection and Diagnostic Overview.

- Open the left plenum chamber cover - 1 - above the E-box.






- Turn the quick-release fasteners - 1, 3 and 4 - counter-clockwise 90° - arrows -.






- Remove the relay/fuse holder cover - 2 -.

- Remove the fuel pump fuse in the relay/fuse holder in the E-box on the left side of the plenum chamber.






- Cover 2nd connector - arrow 2 - terminal of adapter cable with insulating tape to prevent short circuit (V.A.G 1348/3-3).






- Connect the (V.A.G 1348/3A) and (V.A.G 1348/3-3) to the left terminal - arrow 1 - on the fuse pump fuse socket.

- Release the clip and open the cover over the positive terminal - A -.

- Connect alligator clip to positive terminal.

- Press the switch on the remote control.

• It must be possible to hear pump noise near the right fuel tank.

• The fuel pump runs quietly. Avoid surrounding noises while testing the fuel pump.

If no noise is heard, remove the fuel delivery unit. Refer to => [ Fuel Delivery Unit and Transfer Fuel Pump ] Fuel Delivery Unit and Transfer Fuel Pump.

- Check if the electrical wiring between the flange and fuel pump is connected and has continuity.






If no malfunction is detected in the electrical wires, the fuel pump is faulty. Replace the fuel delivery unit.

- Install the fuel delivery unit => [ Installing ] Fuel Delivery Unit and Transfer Fuel Pump.