GF88.79-P-2007R Automatically Dim Left/Right Outside Rearview Mirrors Function

GF88.79-P-2007R Automatically Dim Left/right Outside Rearview Mirrors Function


Networking of components







1 CAN-C CAN message "reverse gear"
2 CAN-B CAN message "circuit 15R and reverse gear engaged"
3 CAN-B CAN message "glare information"
A67 Interior rearview mirror unit
M21/1h1 Automatic dimming mirror
M21/2h1 Automatic dimming mirror (only RHS)
N15/5 Electronic selector lever module control module
N15/6 Automatic gearshift system control module
N69/1 Left door control module
N69/2 Right door control module
N70 Overhead control panel control module
N73 DI control module

Function requirements
- No overvoltage/undervoltage
- Circuit 15R or 15 ON
- Reverse gear not engaged

Function
The mirrors are dimmed in stages as a function of the actuation voltage applied. The electronics in the inside rearview mirror unit (A67) register the ambient light and the light striking the mirror lens, and analyzes these input parameters.

The two input parameters are detected by the mirror dimming forward sensor (A67h1) in the mirror housing (rear) and by the mirror dimming to rear sensor (A67h2) in the mirror lens of the inside rearview mirror unit (A67).
The inside rearview mirror unit (A67) supplies dimming information to the overhead control panel control module (N70) and transmits this as a CAN message to the left door control module (N69/1). The left door control module (N69/1) controls the actuation voltage accordingly for dimming the. driver-side mirror

The dimming operation is ended if an interior lamp is switched on and/or reverse gear engaged.