2.2.9 Refrigerant Temperature Sensor -
G454-
The Refrigerant Temperature Sensor (with temperature-depend‐
ent resistance) is installed, for example, in high pressure line in
vicinity of the compressor.
In the refrigerant circuit, there is a direct relationship between
temperature and pressure, if there should be too little refrigerant
in the refrigerant circuit, the temperature in the refrigerant circuit
rises more strongly than intended for this pressure when A/C sys‐
tem is operating.
Note
♦
Installed, for example, on the Audi Q7 with certain engines.
Refer to ⇒ Heating, Ventilation and Air Conditioning; Rep. Gr.
87 ; Removal and Installation (vehicle-specific repair manual)
and ⇒ Wiring diagrams, Troubleshooting & Component loca‐
tions.
♦
The Climatronic control module -J255- evaluates pressure and
temperature in the refrigerant circuit and switches off the com‐
pressor in the event the temperature increases above the
value stored for this pressure. Refer to ⇒ Heating, Ventilation
and Air Conditioning; Rep. Gr. 87 ; Description and Operation
(vehicle-specific repair manual) and Vehicle Diagnosis, Test‐
ing & Information System -VAS5051B- .
2.3 Electrical Components Not on Refriger‐
ant Circuit
⇒ “2.3.1 Radiator Fan Control Module J293 “, page 78
2.3.1 Radiator Fan Control Module -J293-
This control module switches on and off the A/C clutch and there‐
fore the A/C compressor. It turns on the radiator fan and calcu‐
lates the refrigerant circuit pressure in vehicles with a High
pressure sensor -G65- . Refer to ⇒ Wiring diagrams, Trouble‐
shooting & Component locations, ⇒ Heating, Ventilation and Air
Conditioning; Rep. Gr. 87 ; Description and Operation (vehicle-
specific repair manual).
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
78 Rep. Gr.00 - General, Technical Data
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