VW Golf manuals

Volkswagen Golf Service & Repair Manual: Detecting leaks

External damage can cause leaks in the refrigerant circuit. Because a small leak will involve only small quantities of refrigerant, leaks should be checked for using an electronic leak detector or by introducing a leak detection additive to the refrigerant circuit. Electronic leak detectors can detect leakage rates of less than 5 grams loss of refrigerant per year. The leak detector should be specific to the composition of the particular refrigerant in use. For example, a leak detector for R12 refrigerant is not appropriate for R134a refrigerant because R134a refrigerant has no chlorine atoms to which the lead detector responds.)

Charge factor
There must be space both for liquid and vapour in a container. As the temperature rises, the liquid expands. The space occupied by the vapour becomes smaller. Eventua ...

Refrigerant machine oil
Refrigerant machine oil is miscible (approx. 20%–40% depending on the type of air conditioner compressor and the quantity of refrigerant) in the refrigerant. I ...

Other materials:

Checking auxiliary air heater element - Z35- with auxiliary air heater control unit - J604-, RHD vehicles
Checking Special tools and workshop equipment required Vehicle diagnostic tester with current probe 100 A -VAS 5051B/7- Test conditions Intake temperature less th ...

Removing and installing immobiliser reader coil -D2-, vehicles with keyless access locking and starting system
Removing –  Move steering wheel to rearmost and lowest position. Use the entire range of adjustment of the steering column for this purpose. –  Remove lower steering column trim →&nb ...

Removing and installing interface for entry and start authorisation system -J965-
  Note When renewing the control unit, select Renew function for the respective control unit in Guided fault finding or Guided functions mode → Vehicle diagnostic tester. The removal and insta ...

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