Principles Of Operation

Rear View Mirrors - Interior

Principles of Operation

Interior Auto-Dimming Rear View Mirror

The interior auto-dimming rear view mirror has 2 photoelectric sensors that detect forward and rearward light conditions. Based on these inputs, the automatic dimming feature adjusts the reflectance level of the interior rear view mirror glass to eliminate unwanted glare. When the forward sensor detects daytime conditions, the rearward sensor is inactive and the interior rear view mirror stays in a high reflectance mode. When the forward sensor detects nighttime conditions, the rearward sensor is active and detects glare from the headlights of vehicles approaching from the rear or other glare-producing light sources.

When the ignition is in the RUN or ACC position, voltage is supplied to the interior auto-dimming interior mirror from Smart Junction Box (SJB) fuse 41 (15A). When the vehicle is in REVERSE, voltage is supplied to the interior auto-dimming mirror in order to disable the auto dimming feature.

If the forward or rearward sensors are blocked, the automatic dimming interior mirror might not work correctly.