Automatic Dimming Outside Mirror And Inside Rearview Mirror, Function - GF88.79-P-2010FR

Model 257, 290 up to model year 2021 with code P49 (MIRROR PACKAGE) 

Function requirements, general 

• No overvoltage or undervoltage
• Circuit 15R ON

The electronic ignition lock control unit (N73) transmits circuit status of circuit 15 via the interior CAN (CAN B) to the overhead control panel control unit (N70).

Automatic dimming outside mirror and inside rearview mirror, general 

The inside rearview mirror (A67) senses the ambient light via the mirror dimming light sensor, forward (A67h1) and the light hitting the mirror glass via the mirror dimming light sensor, rearward (A67h2).

The inside rearview mirror evaluates the input factors and transmits the request for mirror dimming via roof LIN (LIN B13) to the overhead control panel control unit. The overhead control panel control unit transmits the dimming information via the interior CAN to the left front door control unit (N69/1).

The left door control unit receives the dimming information and supplies the corresponding actuation voltage to the mirror dimming (M21/1h1) of the left outside mirror (M21/1). The mirror glass of the inside rearview mirror is dimmed by the inside rearview mirror itself by means of activation of the inside rearview mirror dimming (A67h3).

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