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A combined sensor for rain and light detection is
used for the first time in the Audi A6 ’05.
The sensor includes a light-control assistant
function, which relieves the driver of the job of
having to switch the driving light on manually, as
well as a wiper control function, which depends on
the amount of moisture on the front windscreen.
The development goal here was to integrate these
functions in a compact housing.
The sensor is connected as a LIN slave to the control
unit for on-board power supply J519.
Installation position
The sensor for rain and light detection is located on
the windscreen in the attachment base of the
interior mirror.
Tasks of the light sensor
– Switch the driving light on and off automatically
– Activate the Coming Home/Leaving Home
function
– Day/night detection for rain sensor
Switch-on conditions
The light sensor supplies the control unit for
on-board power supply with information for
switching on the driving light in the following
situations:
–Dawn/dusk
–Darkness
– Entering/travelling through tunnels
– Travelling through forests
Convenience electrics
326_090
Note
Allowances are made for disruptive influences,
such as external light, dirt, vibrations or smears
caused by wiper blades.
LIN Terminal 30
Te r m i n a l 3 1
Sensor for rain and light detection G397
326_153
