GF88.79-P-2010CW Automatic Dimming Outside Mirror and Inside Rearview Mirror, Function

GF88.79-P-2010CW Automatic Dimming Outside Mirror And Inside Rearview Mirror, Function
- with CODE (249) Automatically dimming inside rearview mirror and outside mirror (driver)
- up to model year 08


Function requirements
^ Circuit 15R On or
^ No overvoltage/undervoltage
^ Reverse gear not engaged
^ Interior illumination not switched on

Function sequence for automatic dimming outside mirror and inside rearview mirror
The mirror lenses in the inside rearview mirror (A67) and the left outside mirror (M21/1) are electro-chromatically dimmable.This is realized by a layer of electrolyte gel in the mirror which controls the light permeability in increments depending on the voltage applied.

The inside rearview mirror senses the ambient light via the automatic dimming mirror forward light sensor (A67h1) and the light hitting the mirror lens via the automatic dimming mirror backward light sensor (A67h2).
The inside rearview mirror evaluates these input values and transmits the dimming information via the wiper/inside rearview mirror LIN to the front SAM control module with fuse and relay module (N10/1), which transmits the message for automatic dimming mirror via the interior CAN.
The left front door control unit (N69/1) receives the dimming information and supplies the corresponding actuation voltage to the automatic dimming mirror (M21/1h1) of the left outside mirror.The inside rearview mirror is dimmed by actuating the mirror dimming (A67h3).

If an interior lamp is switched on during automatic dimming mirror or the reverse gear is engaged, the dimming is interrupted.

The electronic ignition lock control unit (N73) transmits the current circuit status via interior CAN and chassis CAN.