Volkswagen Golf Service & Repair Manual: Checking holding pressure
Special tools and workshop equipment required |
Pressure tester -VAS 6550- |
Connector cable -VAS 6550/3-3- |
Connector cable -VAS 6550/3-4- |
Vehicle diagnostic tester |
Voltage supply OK
→ Chapter. |
– |
Observe safety precautions
→ Chapter. |
– |
Observe rules for cleanliness
→ Chapter. |
|
|
|
– |
Pull off supply line -1-.
Separate plug-in connectors
→ Chapter. |
The fuel system is pressurised.Risk of injury due to fuel which may
spurt out.Wear eye protection.Wear protective gloves.Release pressure:
place clean cloth around connection and carefully open connection.
– |
Collect escaping fuel with a cleaning cloth. |
|
|
|
– |
Connect hose -VAS 6550/1- to connection
-A- of pressure tester -VAS 6550-. |
– |
Connect hose -VAS 6550/1- to fuel supply line
-1- leading to engine. |
– |
Connect hose -VAS 6550/2- to connection
-B- of pressure tester -VAS 6550-. |
– |
Use hose -VAS 6550/2- to connect fuel line leading to fuel
tank with pressure tester -VAS 6550-. |
– |
Ensure plug-in connectors are secured properly by pulling. |
|
|
|
– |
Ensure that drain tap -C- on
pressure tester-1- is closed. |
– |
Shut-off valves -A- and
-B- on pressure tester-1-
are open. |
– |
Connect vehicle diagnostic tester. |
– |
Select final control diagnosis for fuel pump in vehicle
self-diagnosis program. |
Note
The fuel pump is now actuated to build up fuel pressure. |
If the final control diagnosis is to be carried out several
times in succession, it may be necessary to start the engine
briefly before repeating the final control diagnosis. |
– |
Read off fuel pressure on pressure gauge. |
Specification: 4.0…7.0 bar. |
If fuel pressure is OK, check holding pressure
→ Chapter. |
If the specification is exceeded: |
– |
Pressure limiting valve in fuel delivery unit is defective. |
– |
Renew fuel delivery unit
→ Chapter. |
If the specification is not attained: |
Proceed as follows to check fuel pressure at fuel delivery
unit: |
– |
Remove right rear seat
→ General body repairs, interior; Rep. gr.72. |
|
|
|
– |
Partially detach cover -1- in
floor covering at parting line -arrow-. |
– |
Do not detach cover completely from floor covering in order
to ensure it is reinstalled in the correct installation
position. |
– |
Detach it just enough that the cover can be folded upwards. |
– |
Fold up cover in -direction of arrow-. |
– |
Remove rear bench seat
→ General body repairs, interior; Rep. gr.72. |
|
|
|
Continuation for all vehicles: |
– |
Unclip cover -1- for flange at
retaining tabs -arrows-, using
removal wedge -3409-. |
|
|
|
– |
Unclip sealing grommet -1-
downwards from cover -2-. |
– |
Push cover -2- back along
wiring harness -3-. |
|
|
|
– |
Press up tab -2- in
-direction of arrow A-; to do so,
reach between floor panel and fuel tank with your finger. |
– |
At the same time, carefully pull fuel pump control unit-1-
out of mounting -in direction of arrow B-
by grasping hold of wiring harness -3-. |
– |
Guide fuel pump control unit -J538- out towards interior
between fuel tank and floor panel. |
– |
Place fuel pump control unit -J538- (with connector still
connected) to one side. |
|
|
|
– |
Pull fuel line -1- off flange.
Separate plug-in connectors
→ Chapter. |
The fuel system is pressurised.Risk of injury due to fuel which may
spurt out.Wear eye protection.Wear protective gloves.Release pressure:
place clean cloth around connection and carefully open connection. |
|
|
– |
Connect pressure tester -VAS 6550- with hose -VAS 6550/3-4-
to fuel delivery unit -1-. |
– |
Connect pressure tester -VAS 6550- and fuel supply line
-2- by means of hose -VAS
6550/3-3-. |
– |
Ensure plug-in connectors are secured properly by pulling. |
|
|
|
– |
Ensure that drain tap -C- on
pressure tester-1- is closed. |
– |
Shut-off valves -A- and
-B- on pressure tester-1-
are open. |
– |
Repeat final control diagnosis to build up fuel pressure. |
If specification is attained: |
– |
Check fuel lines for possible restrictions (kinks) or
blockages. |
– |
Check fuel line for leaks and damage. |
|
|
|
If the specification is not attained: |
– |
Remove fuel delivery unit
→ Chapter and check for contamination. |
– |
Check that all hoses are connected
-arrows-. |
– |
Check fuel lines for possible restrictions (kinks) or
blockages. |
– |
Check fuel lines for leaks and damage. |
– |
Fuel pump is defective, renew fuel delivery unit
→ Chapter. |
|
|
|
Special tools and workshop equipment required
Removal wedge -3409-
Pressure tester -VAS 6550-
Connector cable -VAS 6550/3-3-
...
Special tools and workshop equipment required
Removal wedge -3409-
Pressure tester -VAS 6550-
Connector cable -VAS 6550/3-3-
...
Other materials:
Cleaning and caring for chrome and aluminium trim parts
First read and observe the introductory information
and safety warnings
Use a damp, clean, lint-free and soft cloth to clean the surfaces.
For heavy soiling use a special solvent-free cleaning product.
Polish the chrome and aluminium trim parts using a soft, dry cloth.
NOTIC ...
Removing and installing brake servo, LHD vehicles
Note
If there are problems with the brake servo, first check the
brake servo vacuum system
→ Chapter.
Special tools and workshop equipment
required
...
Cleaning the engine compartment
First read and observe the introductory information
and safety warnings The engine compartment of any motor vehicle is a hazardous
area .
The engine compartment should be cleaned by a qualified workshop. Corrosion protection
could be removed and electrical components damaged if the com ...
© 2016-2024 Copyright www.vwgolf.org