ELECTROCHROMIC Inside Rear View Mirror: Description: Notes

The ECM (ElectroChromic inside rear view Mirror) is for dimming the reflecting light from a vehicle behind at night, in order the user not to be dazzled by the light. The front looking sensor detects brightness of the surroundings, while the rearward looking sensor the strength of the reflecting light so that adjusts the reflexibility of the mirror in the range of 7~85%. But, when the reverse gear is engaged, it stops functioning.

Fig 1: Identifying Electrochromic Inside Rear View Mirror Connector Terminals

Courtesy of HYUNDAI MOTOR CO.

1. The front looking 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.

Fig 2: Locating Status LED, Display Window, Rear Light Sensor And Feature Control Button

Courtesy of HYUNDAI MOTOR CO.

Fig 3: Locating Front Looking Sensor

Courtesy of HYUNDAI MOTOR CO.

For Inside Rear View Mirror wiring, see "Electrochromic Mirror Circuit" under POWER MIRRORS in SYSTEM WIRING DIAGRAMS article.