Volkswagen Workshop Service and Repair Manuals > New Beetle > Heating, ventilation, air conditioning system | Heating, air conditioning | Air conditioner | Repair work on the refrigerant circuit which can only be carried out by suitable workshops with properly trained mechanics (spec | Checking high pressure sensor G65 | Check electrical power supply for high-pressure sender G65

Check electrical power supply for high-pressure senderG65

Check electrical power supply for high-pressure sender -G65-

Connector assignment on high-pressure sender -G65-

Kontakt 1 -

Earth

Kontakt 2 -

Signal output (square-wave signal to radiator fan control unit -J293- and to engine control unit)

Kontakt 3 -

Positive (terminal 15)

Note

t	Air conditioner compressor is not switched on when plug -B- is pulled out.

t	High-pressure sender -A- is an electronic control unit that produces a square-wave signal with a duty cycle that changes as refrigerant circuit pressure changes.

–	Check electrical power supply and earth connection to high-pressure sender -G65- according to circuit diagram. → Current flow diagrams, Electrical fault finding and Fitting locations

–	Check for short circuit between cables.

–	Additionally check cables for short circuit to battery positive or earth.

–	Check cable connection for discontinuity between high-pressure sender -G65- and control unit -J293- according to circuit diagram. → Current flow diagrams, Electrical fault finding and Fitting locations

If no fault is found in the cables:

–	Renew high-pressure sender -G65-.

Removing and installing

Note

The high-pressure sender can be removed without extracting the refrigerant from the refrigerant circuit.

Remove 3-pin connector and pressure switch -B- (5 Nm).

–	Renew O-ring -A- (10.8 mm; 1.8 mm).