Hyundai Tucson: Electro Chromic Inside Rear View Mirror / Description and Operation

- Description Electro Chromic Inside Rear View Mirror The ECM (Electro Chromatic inside rear view Mirror) is intended dim the reflecting light in the rear view mirror. The forward facing sensor detects brightness of the surroundings, while the rearward looking sensor is for the light from the rear. The strength of the light in the rear sensor is used by the mirror to adjust the shading. It ranges from 10 to 70%. When the reverse gear is engaged, it stops functioning.

1.The forward facing sensor sees if the brightness of the surroundings is low enough for the mirror to operate its function.

2.The rearward looking sensor detects glaring of the reflecting light from a vehicle behind.

3.The ECM is darkened to the level as determined by the rearward looking sensor. When the glaring is no longer detected, the mirror stops functioning.