With Generic Scan Tool

Check Fuel Pump

Recommended special tools and equipment





- 3217 ring nut spanner
- VAG1348/3A remote control with VAG1348/3-2 adapter cable
- VAG1466 electrical circuit tester
- VAG1527B voltage tester
- VAG1594A connector test kit
- VAG1715 multimeter





- V.A.G 1318 pressure gauge
- VAG1318/1 adapter
- VAG1318/11 adapter
- VAG1318/17 adapter
- VAG1318/23 adapter
- VAG1332 torque wrench (40 to 200 Nm)
- Measuring container
- Wiring diagram

Test requirements





- The respective fuses of Fuel Pump (FP) -G6- must be OK.
- Battery voltage must be at least 11.5 volts.
- All electrical consumers such as, for example, lights and rear window defroster must be switched off.
- If vehicle is equipped with an A/C system, it must be switched off.
- Parking brake must be engaged or else daylight driving lights will be switched on.

NOTE: Note function description of crash fuel shut-off.

Checking function and voltage supply

NOTE: In the continuing work procedure, it is possibly necessary to disconnect the battery Ground (GND) strap. Therefore, determine whether a coded radio is installed. If necessary, determine anti-theft coding first.

- Remove cover from Fuel Pump (FP)
- Operate starter briefly. Fuel pump must audibly start up.
- Switch ignition off.

If Fuel Pump (FP) does not start up:
- Remove cover in front of fuse holder.






- Remove fuse 28 from fuse holder.
- Connect VAG1348/3A remote control to Fuel Pump (FP) and B+ at terminal 28a using remote control connection (VAG1348/3-2).
- Operate remote control.

If Fuel Pump (FP) runs:
- Check activation of Fuel Pump (FP) Relay -J17- according to wiring diagram.

If Fuel Pump (FP) does not run:
- Disconnect 4-pin connector from flange at Fuel Pump (FP).






- Connect VAG1527 diode test lamp to the outer terminals of the connector.
- Operate remote control.
LED must light up.

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

LED lights up (voltage supply OK):






- Use 3217 ring nut spanner to remove union nut.
- Check whether electrical wires between flange and Fuel Pump (FP) are connected.

If there are no open circuits:
- Fuel Pump (FP) faulty, replace Fuel Pump (FP) unit, Fuel Pump (FP) unit, removing and installing.
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes