Fuel pump, checking

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2006 Volkswagen GTI, 2005 Volkswagen Jetta, 2005 Volkswagen GTI, 2004 Volkswagen Jetta, and 2004 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required

Hand held remote control (jumper).
Multimeter.
Electrical connector test lead set.

Test requirements

Battery voltage at least 11.5 volts.
Fuel Pump (FP) Fuse 28 OK.
Fuel Pump (FP) Relay J17 OK.

Checking voltage supply

Remove the rear seat bench. Refer to 72 - SEAT - FRAMES .
Disconnect the Transfer Fuel Pump (FP) G6 electrical harness connector.

Fig 1: Connecting Voltage Tester V.A.G 1527B Using Adapter Cables From Connector Test Kit V.A.G 1594C To Outer Terminals Of Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Using a Multimeter , check the Transfer Fuel Pump (FP) G6 electrical harness connector terminals 1 to 4 for voltage.

Specified value: battery (+).

If the specified value was not obtained:

Check the wiring for a short circuit to Battery positive (+) or an open circuit.
Check the electrical harness connector for damage, corrosion, lose or broken terminals.
If necessary, repair the electrical circuit.

If the specified value was obtained:

Connect a Hand held remote control (jumper) to terminal - 1 - of the fuel pump electrical harness connector and to the vehicle battery (+).

Fig 2: A Jumper Cable From A Electrical Connector Test Lead Set Connected To Terminal Of The Fuel Delivery Unit And To Vehicle Ground

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect a jumper cable from a Electrical connector test lead set to terminal - 4 - of the fuel delivery unit and to vehicle Ground (GND).
Press switch on the Hand held remote control (jumper).

NOTE:

The Fuel Pump (FP) runs quietly. Avoid surrounding noises while testing the fuel pump.

Listen for an operating noise from the fuel pump.

If no operating noise is heard:

Remove the fuel delivery unit. Refer to 20 - FUEL SUPPLY .

Fig 3: Checking The Electrical Circuit Between Terminals Of The Fuel Delivery Unit And The Fuel Pump For Continuity

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Using a Multimeter , check the electrical circuit between terminals - 1 - and - 4 - of the fuel delivery unit and the fuel pump for continuity.

Specified value: 0 ohms.

If a malfunction is detected in the electrical circuit:

Check the wiring for a short circuit to Battery positive (+) or an open circuit.
Check the electrical harness connector for damage, corrosion, lose or broken terminals.
If necessary, repair the electrical circuit.
If no malfunction is detected in electrical circuit, replace the fuel pump. Refer to 20 - FUEL SUPPLY .

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

Check the DTC memory.
If necessary, erase the DTC memory.
If the DTC memory was erased, generate readiness code.

End diagnosis