Volkswagen Golf Service & Repair Manual: Checking
| – |
Connect manifold gauge (air conditioner service station). |
| – |
Read pressure gauge. It may display two results, A and B. |
|
|
|
| Ambient
temperature in degrees centigrade |
Pressure in
the refrigerant circuit in bar positive pressure |
| +15°C |
3.9 |
| +20°C |
4.7 |
| +30°C |
6.7 |
| +40°C |
9.1 |
| A- The pressure in the refrigerant circuit is less than
shown in the table, (insufficient refrigerant in the circuit). |
| - Check for leaks using leak detector. |
| - The high-pressure safety valve has opened; check the
activation for the radiator fan referring to the current flow
diagram. |
| Check refrigerant pipes and refrigerant hoses for bends that
have too tight radius (restrictions in cross-section) and for
external damage. If no faults are found, purge the refrigerant
circuit. |
| B- The pressure in the refrigerant circuit is greater than
or equal to the value in the table. |
| – |
Set air conditioning system to maximum cooling power. |
| – |
Open vents in dash panel. |
| The air conditioner compressor is driven by the engine, via
the V-belt and magnetic clutch. |
 Note
| If the air conditioner compressor is not being driven, check
the power supply for the air conditioning system magnetic clutch
-N25- in accordance with the current flow diagram. |
| If power supply is OK, repair magnetic clutch. |
| If the air conditioner compressor is not being driven, check
the refrigerant circuit: |
| – |
Raise engine speed to 2,000 rpm. |
| – |
Observe the manifold gauge. |
|
Specifications
| Increasing from the pressure when the engine is stopped to a
maximum of 20 bar positive pressure. |
| Decreasing from the pressure when the engine is stopped to
1.3 bar positive pressure. |
|
Radiator and condenser must be clean (clean them if
necessary).
The V-belt for air conditioner compressor and alternator is
correct ...
Note
Connecting air conditioner service station
→ Chapter.
Observe the test prerequisites
→ Cha ...
Other materials:
Using the selection menu in the instrument cluster
Fig. 16 Vehicles without a multifunction
steering wheel: button ① on the windscreen wiper lever for confirming menu points,
and rocker switch ② for changing menus and information displays
Fig. 17 Right-hand side of the multifunction
steering wheel: controls for using the menus and inform ...
Cleaning battery clamp and battery terminal
Special tools and workshop equipment
required
VAG 1331
Note
The use of penetrating fluid, contact spray or grease etc.
is prohibited since the missing adhesion ...
Description of the central locking system
First read and observe the introductory information
and safety warnings The central locking system enables you to lock and unlock
all the doors, the tailgate and tank flap from one central point:
From outside the vehicle with the vehicle key .
From outside the vehicle with Keyl ...
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Test prerequisites
Checking systems with a restrictor and reservoir and air conditioner
compressor regulating valve -N280- (with externally regulated air conditioner
compressor)