Logic of naming sensors in VW-group is simple it contains "G" (german "Geber") + sensor number. The sensor number is unique. Here you can find fitting location, connectors and pins description, some information about sensors signals.

To our mind, sensors information is reference, so there is only simple search by sensor number.


Audi R8 42 (2007- )
Audi A8 4E (2002 -)
Audi A6 4F (2005- )
Audi Q7 4L (2007- )
Audi TT 8J (2006- )
Audi A4 8K (2008-)
Audi A3 8P (2003- )
Audi Q5 8R (2009- )

Audi R8 42 (2007- ). G107 ќписание

Sunlight penetration photosensor -G107


A - Sunlight penetration photosensor -G107

B - Warning lamp for SAFE function of central locking -K133


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.

Photodiodes are 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 current.

Consequently, 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.


Measured value block 025

Display zones 1 ... 4: Measured value of sunlight penetration photo sensor† -G107-

Display zone 1: Measured value for left side in V (Volts)

Display zone 2: Measured value for left side in W / m2 (Watts per m2)

Display zone 3: Measured value for right side in V (Volts)

Display zone 4: Measured value for right side in W / m2 (Watts per m2)



YZ Note:

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 diagram; ELSA


Site news

November 30, 2012
Content update We are starting big site update. We are sorry for bugs and missed content.
We are especially grateful for financial support of our site

User Name
Forgot your password?