Sunlight penetration photosensor -G107
A ... Cover
with sunlight penetration photosensor -G107
Connector on sunlight penetration photosensor -G107
C ... Fixings
D ... Sunlight
penetration photosensor -G107
E ... Cover
The sunlight penetration
photosensor -G107 is located in the defroster vent cover.
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
increase in current indicates a higher sunlight penetration to the air
conditioner control unit, which in turn adjusts the interior temperature: the
temperature flap and fresh air blower are operated accordingly. In the version
with two sensors the side of the vehicle exposed to stronger sunlight
penetration is cooled more.
J The control unit
operates with an assumed fixed value for sunlight penetration if the signal
J The readout of the
sunlight penetration photosensor -G107 can be changed by shining a suitable
lamp onto the sensor.
J If the
system is intact, when the sunlight penetration photosensor -G107 is covered
over the blower speed must fall.
J If a
permanent penetration of around 300 Watts per mІ is displayed
regardless of the light shining on the sunlight penetration photosensor -G107,
check the cabling to the photosensor according to the current flow diagram. If
the sunlight penetration photosensor -G107 is defective the faulty value is
overwritten by the value of the operative side. If the sensor is defective the
out-flow temperature is not lowered on either side.
J The sunlight penetration
value readout is heavily dependent on the season and time of day, as well as
the vehicle's location.
conditioner; Rep.Gr. 87; Removing and installing sunlight penetration
A Current flow