Description And Operation: Operation: Inside

The soft switch located in the U-Connect™ touch screen provides the vehicle operator with a manual control of whether the automatic dimming feature is operational. If the dimming is turned to the off position, the mirror will always turn back ON by default at the onset of a new ignition ON cycle. The automatic dimming mirror circuitry also senses the backup lamp circuit, and will automatically disable its self-dimming feature whenever the transmission gear selector is in the REVERSE position.

The ambient photocell sensor of the mirror faces forward, to detect the outside light levels through the windshield glass. A second headlamp photocell sensor is located in the upper right quadrant of the mirror face, to detect the light level received at the rear window side of the mirror. When the mirror control circuitry detects that the difference between the two sensed light levels has become too great (the light level received at the rear of the mirror is much higher than that at the front of the mirror) the mirror begins to darken. A thin layer of electrochromic material between two pieces of conductive glass make up the face of the mirror.

On vehicles equipped with an optional driver side automatic dimming outside rear view mirror, the signal to control the dimming of that mirror is generated by the automatic dimming inside rear view mirror circuitry. That signal is then delivered to the driver side outside rear view mirror on two hard wired circuits.

For vehicles equipped with the ASSIST Call  and 911 Call  options. Refer to DESCRIPTION AND OPERATION .

The Body Control Module (BCM) determines the ignition status and the gear status. Once determined, the BCM sends an enable/disable signal over the bus to the electrochromic mirror. The electrochromic mirror reads the internal message for the sensor value and determines the ratio between forward/backward light intensity, along with the enable signal coming from the BCM, to determine the reflecting mode to be used.