Volkswagen Golf Service & Repair Manual: Checking holding pressure, engine code CWVA
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. |
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Observe safety precautions
→ Chapter. |
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Observe rules for cleanliness
→ Chapter. |
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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.
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Collect escaping fuel with a cleaning cloth. |
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Connect hose -VAS 6550/1- to connection
-A- of pressure tester -VAS 6550-. |
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Connect hose -VAS 6550/1- to fuel supply line
-1- leading to engine. |
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Connect hose -VAS 6550/2- to connection
-B- of pressure tester -VAS 6550-. |
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Use hose -VAS 6550/2- to connect fuel line leading to fuel
tank with pressure tester -VAS 6550-. |
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Ensure plug-in connectors are secured properly by pulling. |
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Ensure that drain tap -C- on
pressure tester-1- is closed. |
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Shut-off valves -A- and
-B- on pressure tester-1-
are open. |
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Connect vehicle diagnostic tester. |
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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. |
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Read off fuel pressure on pressure gauge. |
Specification: Approx. 4.0 bar. |
If fuel pressure is OK, check holding pressure
→ Chapter. |
If the specification is exceeded: |
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Pressure limiting valve in fuel delivery unit is defective. |
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Renew fuel delivery unit
→ Chapter. |
If the specification is not attained: |
Proceed as follows to check fuel pressure at fuel delivery
unit: |
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Remove right rear seat
→ General body repairs, interior; Rep. gr.72. |
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Partially detach cover -1- in
floor covering at parting line -arrow-. |
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Do not detach cover completely from floor covering in order
to ensure it is reinstalled in the correct installation
position. |
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Detach it just enough that the cover can be folded upwards. |
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Fold up cover in -direction of arrow-. |
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Remove rear bench seat
→ General body repairs, interior; Rep. gr.72. |
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Continuation for all vehicles: |
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Unclip cover -1- for flange at
retaining tabs -arrows-, using
removal wedge -3409-. |
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Unclip sealing grommet -1-
downwards from cover -2-. |
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Push cover -2- back along
wiring harness -3-. |
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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. |
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Connect pressure tester -VAS 6550- with hose -VAS 6550/3-4-
to fuel delivery unit -1-. |
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Connect pressure tester -VAS 6550- and fuel supply line
-2- by means of hose -VAS
6550/3-3-. |
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Ensure plug-in connectors are secured properly by pulling. |
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Ensure that drain tap -C- on
pressure tester-1- is closed. |
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Shut-off valves -A- and
-B- on pressure tester-1-
are open. |
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Repeat final control diagnosis to build up fuel pressure. |
If specification is attained: |
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Check fuel lines for possible restrictions (kinks) or
blockages. |
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Check fuel line for leaks and damage. |
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If the specification is not attained: |
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Remove fuel delivery unit
→ Chapter and check for contamination. |
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Check that all hoses are connected
-arrows-. |
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Check fuel lines for possible restrictions (kinks) or
blockages. |
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Check fuel lines for leaks and damage. |
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Fuel pump is defective, renew fuel delivery unit
→ Chapter. |
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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
Pressure tester -VAS 6550-
Removal wedge -3409-
Connector cable -VAS 6550/3-3-
...
Other materials:
Calibrating Blind Spot Monitor control unit -J1086-/-J1087-
Note
Before the actual calibration process of the control units,
the calibration unit -VAS 6350- needs to be set up as described
in the following chapter.
Special tools and workshop equipment
required
  ...
Programming the auxiliary heater
First read and observe the introductory information
and safety warnings Before programming, check that the date
and time set in the vehicle are correct .
The auxiliary heater can be programmed via the Auxiliary heater menu in the infotainment
system.
Opening the Auxiliary heater menu ...
Checking charge air system for leaks
Special tools and workshop equipment
required
Charge air system tester -V.A.G 1687-
Procedure
–
Relea ...
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