Fuel Pump, Checking

Fuel Pump, Checking

Special tools, testers and auxiliary items
- VAG 1348/3A Remote control with adapter cable VAG 1348/3-2
- 3217 Collar nut wrench

Test conditions
- Battery voltage OK.
- Fuse 18 OK.

Test sequence
- Switch ON ignition.
- Fuel pump must run briefly but audibly

If fuel pump does not run
- Remove storage tray in front of relay panel







- Remove fuel pump relay -J17- from fuse/relay panel position 12
- Connect remote control VAG 1348/3A to terminal 4 and battery positive (+) using adapter cable VAG 1348/3-2
- Operate remote control.

If fuel pumps run
- Check fuel pump relay activation

Fuel pump does not run:
- Cut through carpet at perforation (on right of hand brake lever).
- Pull connector off fuel tank flange.







- Connect VAG 1527B LED tester to outer terminals of connector using jumper wires from VW 1594 adaptor kit
- Operate remote control.
- LED must light up

If LED does not light up:
- Locate and eliminate open circuit using wiring diagram

If LED lights up (voltage supply OK)







- Remove union nut using 3217.
- Check if wiring between flange and fuel pump is connected.

If open circuit NOT found:
- Fuel pump faulty, replace fuel delivery unit