Climate Profiles; Air Conditioning System Sensors; Ambient Temperature Sensor G17; Signal Analysis - Volkswagen Golf 2014 Service Training

Heating and air conditioning

Climate profiles

The climate profile is set using the operating and
display unit for the Infotainment system. The following
three climate profiles are available for selection:
• Gentle
• Average
• Intensive
A characteristic map has been stored for each
individual climate profile in the Climatronic control
unit. Depending on the climate profile selected, the
airflow is regulated using the fresh air blower speed.
The time needed to respond to disturbances varies
between the climate profiles. For example, the climate
profile intensive gives the information an even
stronger weighting when processing it. Furthermore,
this profile also factors in the signals from the sunlight
sensor.

Air conditioning system sensors

Ambient temperature sensor G17

Installation location
The ambient temperature sensor G17 is installed
behind the front bumper.
Function
The temperature is measured by
NTC thermistors.
Effects of failure
The air conditioning system control unit J255 will
assume a defined temperature value of 0°C in this
case. The air conditioning system will continue to
operate using this value.
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Climate profile: intensive

Signal analysis

The signal is transmitted to the onboard supply control
unit J519. This transmits it to the air conditioning
system control unit J255 via the convenience CAN
bus.
Using the „Guided Functions" in the vehicle diagnostic
tester, the current outside temperature can be stored
in the air conditioning system control unit. This
function is useful when working on the air
conditioning system in the workshop when the vehicle
was exposed to temperatures of less than 0°C
beforehand and the air conditioning system control
unit needs to be renewed.
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