PRESSURE ON Fuel Delivery Unit -GX1-, CHECKING

WARNING: This page is about a different car, the 2023 Volkswagen Arteon. However, it is still accessible from the selected car via links, so may be relevant.

Check the residual pressure with the Vehicle Diagnostic Tester.

Select repair group 20 - Fuel Supply System on the Vehicle Diagnostic Tester and follow the instructions.

Only the necessary preliminary work and the connecting of testing equipment are described in the repair information.

The appropriate Service Information will specify which steps are necessary.

The required tools are named in the procedure and are listed above in the tool list.

Special tools and workshop equipment required

Pressure Tester Kit:VAS 6550

Fig 1: Identifying Pressure Tester Kit VAS 6550
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
Pressure Tester Kit - Adapter Set:VAS 6550/3

Fig 2: Identifying Pressure Tester Kit - Adapter Set VAS 6550/3
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
Vehicle Diagnostic Tester

Connecting the testers:

-- Remove the installation opening cover. Refer to INSTALLATION OPENING COVER, REMOVING AND INSTALLING .

CAUTION:

The fuel system is under pressure.

Risk of injury from fuel spraying out.

- Wear protective eyewear.

- Wear safety gloves.

- Reduce the pressure: place clean cloths around the connection point and carefully open the connection point.

-- Pull the fuel line -1- off the flange. Disconnect the connector couplings. Refer to CONNECTOR COUPLINGS, DISCONNECTING .

Fig 3: Fuel Lines to the Fuel Delivery Unit

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Connect the Pressure Tester Kit:VAS 6550 to the fuel delivery unit -1- using the Pressure Tester Kit - Adapter Set - Hose 4:VAS 6550/3-4 .

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Connect the Pressure Tester Kit - Adapter Set - Hose 3:VAS 6550/3-3 between the Pressure Tester Kit:VAS 6550 and the fuel line -2-.

-- Pull on the connector couplings to check them for secure fit.

-- Make sure that the drain valve -C- on the Pressure Tester -1- is closed.

-- The shut-off valves -A- and -B- on the Pressure Tester Kit -1- are closed.

CAUTION:

Risk of a fire due to leaking fuel.

Severe injuries and burns are possible.

- Before the test, check if all connected lines are securely connected by pulling on them.

- Remove any cleaning cloths soaked in fuel from the vehicle area.

-- Follow the instructions on the Vehicle Diagnostic Tester.

NOTE:

To prevent the fuel pump from activating, disconnect the battery before removing the Fuel Tester Kit:VAS 6550 . Refer to BATTERY, DISCONNECTING AND CONNECTING .

Reduce the pressure in the system before removing the connector couplings. To do this, hold the drain hose at connection -C- in a suitable container. Then carefully open the shut-off valve.