Sunlight penetration photosensor -G107
The sunlight penetration
photosensor -G107 is located in the windscreen defroster vent.
The air conditioner
temperature control is influenced with the aid of photosensors which record the
direct sunlight penetration.
The sunlight passes
through a filter and an optical element onto the photodiode. The filter
protects the optical element against UV radiation.
light-sensitive semiconductor elements. With no light incursion only a small
amount of current can flow through the diode. When light is penetrating the
current flow increases. Thus, the stronger the light incursion the higher the
Climatronic control unit -J255 is able to deduce a higher sunlight penetration
from the increase in current and adjust the interior temperature - the temperature flap and
fresh air blower are operated accordingly.
There are different
versions of the sunlight penetration photosensor -G107. So be sure to use the
correct one. If a sunlight penetration photosensor -G107 not intended for this
vehicle is fitted (it delivers a different signal than configured in the
Climatronic control unit -J255), the Climatronic control
unit -J255 will not be able to evaluate the signal from the sunlight penetration photosensor -G107 and the air
conditioner control will be faulty.
A Air conditioner;
Rep.Gr. 87; Removing and installing sunlight penetration photosensor -G107
A Current flow