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– Compare the displayed evaporator vent temperature sensor
value with the values in the diagram.
A - Air temperature measured by the evaporator vent temperature
sensor
B - Ambient temperature
C - Permissible tolerance range
Depending on ambient temperature, air temperature measured
must be within stated tolerance range -C- after 5 minutes.
Note
♦
If the necessary values are not reached, check the measured
values from the evaporator vent temperature sensor and the
measured value from the left front upper body outlet temper‐
ature sensor -G385- . Compare the displayed measured val‐
ues with each other:
♦
The measured value from the evaporator vent temperature
sensor differs from the measured value from the left front up‐
per body outlet temperature sensor by just a little. Perform
⇒ “4.2.3 Determining Malfunction if Specified Values Are Not
Obtained“, page 85 .
♦
If the measured value from the evaporator vent temperature
sensor is greater than the measured value from the left front
upper body outlet temperature sensor -G385- , then make sure
the evaporator vent temperature sensor is installed correctly
and perform an electrical test on this sensor using -
VAS5051B- under "Guided Fault Finding."
♦
The function of the air conditioning is recognizable, e.g. the
refrigerant pipe on the low pressure side (thick line) cools off.
If the measured value for the evaporator vent temperature sensor
-G263- (and therefore the system output) is OK:
– Adjust air output direction via the air distribution rotary switch
on the Climatronic control module -J255- to “footwell“.
– Compare the displayed value from the evaporator vent tem‐
perature sensor to the measured values from the left footwell
vent temperature sensor -G261- and right footwell vent tem‐
perature sensor -G262- .
The center outlet temperature sensor and footwell outlet temper‐
ature sensor measured values may not be greater than maximum
3 ℃ after 5 minutes, than the evaporator vent temperature sensor
measured value.
Audi TT 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 01.2011
84 Rep. Gr.87 - Air Conditioning
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