Volkswagen Golf / Golf GTI / Golf Variant. Service manual - part 761

– Connect the -VAS6550- to the fuel delivery unit -1- using the

-VAS6550/3-4- .

– Connect the -VAS6550/3-4- to the shut-off valve -A-.
– Connect the -VAS6550/4- to the connection -B- on the -

VAS6550- .

– Hold the open end of the -VAS6550/4- hose in a measuring

container.

– 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 opened.

– Push the -VAG1348/3A- .

Note

The Transfer Fuel Pump - G6- is activated!

– Adjust the pressure to 4.0 bar with the adjustment wheel on

the Pressure Regulating Valve -arrow-.

– From this point on do not move the adjustment wheel.
– Empty the measuring container.
– Press the remote control for 60 seconds while measuring the

fuel pump voltage.

– Compare the delivered quantity of fuel with the specified value

in the table.

Axis designation

Unit

Minimum delivery rate

cm

3

Fuel pump voltage when the

engine is idling and the pump is

running

Volt

Example:
During test, a voltage of 10.5 Volts is measured. This results in a

minimum delivery quantity of approximately 1200 cm

3

/60 s.

If the Specified Value is Obtained:
– Check the fuel lines for possible restrictions (kinks) or block‐

ages.

– Check the fuel lines for leaks and damage.
If the Specified Value is not Obtained:
– Remove the fuel delivery unit. Refer to

⇒ “2.2 Fuel Delivery Unit/Fuel Level Sensor, Removing and

Installing”, page 52

 .

– Check the filter screen for contaminants.
– Check whether the hose connections -arrows- to the fuel de‐

livery unit -1- are sealed.

– Check the fuel lines for possible restrictions (kinks) or block‐

ages.

– Check the fuel lines for leaks and damage.
If no Malfunction was Detected:
– Replace the fuel delivery unit. Refer to

⇒ “2.2 Fuel Delivery Unit/Fuel Level Sensor, Removing and

Installing”, page 52

 .

8.1.8

Fuel Delivery Rate, Checking, Vehicles

with Engine Code CWVA

Special tools and workshop equipment required
♦ Trim Removal Wedge - 3409-
♦ Pressure Tester Kit - VAS6550-
♦ Pressure Tester Kit - Adapter Set - Hose 3 - VAS6550/3-3-
♦ Pressure Tester Kit - Adapter Set - Hose 4 - VAS6550/3-4-
♦ Pressure Regulator Valve - VAS6550/4-
♦ Connector Test Set - VAG1594D-
♦ Multimeter, for example Analog/Digital Multimeter - FLU83III-
♦ Injection Rate Comparison Meter Kit - Remote Cable -

VAG1348/3A-

♦ Vehicle Diagnostic Tester - Test Adapter - 5 Pin - VAS5565-
♦ Vehicle Diagnostic Tester
♦ Measuring container, greater than three liters

Perform the following work:
Fuel Delivery Rate, Checking in Engine Compartment, Quick

Test:

Note

The fuel delivery rate is first checked in the engine compartment

with the “Check fuel delivery rate, quick test” Guided Function.

Perform a second measurement on the fuel delivery unit flange if

the minimum delivery rate is not attained.

– Connect the Vehicle Diagnostic Tester .
– Start Guided Functions.
– Check the fuel delivery rate function and select the quick test.
– Follow the instructions displayed on the Vehicle Diagnostic

Tester .

If the Specified Value is not Obtained:
– Open the fuel filler door unit -2-.
– Clean the area around the fuel filler neck.
– Remove the cap -1- for the fuel filler neck.
– Repeat checking the fuel delivery rate, quick test

⇒ page 105

 .

If the Specified Value is Obtained:
– Check the fuel tank ventilation. Refer to

⇒ “6.4.1 Fuel Tank, Checking Ventilation, with Fuel Tank Leak

Detection”, page 72

 .

If the Specified Value is not Obtained:
– Check the fuel lines for possible restrictions (kinks) or block‐

ages.

– Check the fuel lines for leaks and damage.
If no Error Can Be Found:
Check the fuel delivery rate on the fuel delivery unit as follows:
Fuel Delivery Rate, Checking on Fuel Delivery Unit:

Note

♦

Disconnect the connector couplings. Refer to

⇒ “4.1 Connector Couplings, Disconnecting”, page 62

 .

♦ If driving is still impaired with the fuel tank 

1

/4 full, then perform

a fuel delivery test with the fuel tank only 

1

/4 full or with very

little fuel in the fuel tank.

• Voltage supply OK. Refer to

⇒ “8.1.1 Fuel Pumps, Checking Function and Power Supply”,

page 81

 .

• Fuel pressure is OK. Refer to

⇒ “8.1.3 Fuel Pressure, Checking”, page 87

 .

• The battery voltage must be minimum 11.5 V. Charge the bat‐

tery if necessary. Refer to ⇒  Electrical Equipment; Rep. Gr. 

27 ; Battery; Battery, Charging .

• Fuel Pump Control Module - J538- is OK use the Vehicle Di‐

agnostic Tester ⇒ Vehicle diagnostic tester.

– Pay attention to all safety precautions. Refer to

⇒ “1 Safety Precautions”, page 1

 .

– Follow the guidelines for clean working conditions. Refer to

⇒ “3.1 Parking/Auxiliary Heater and Fuel System Clean Work‐

ing Conditions”, page 4

 .

– Connect the battery charger. Refer to ⇒  Electrical Equipment;

Rep. Gr.  27 ; Battery; Battery, Charging .

Golf Sportsvan:
– Remove the right rear seat. Refer to ⇒  Body Interior; Rep. Gr. 

72 ; Rear Seats; Bench Seat / Single Seat, Removing and In‐

stalling .