Inside Rearview Mirror with Automatic Day-Night System
The automatic day-night system consists of the following components:
| • | Body Control Module (BCM) |
The inside rearview mirror consist of 2 photocell sensors. The headlight
sensor, located on the front of the mirror is used to determine light conditions present
at the mirror face from sources behind the vehicle. The ambient light sensor, located
on the rear of the mirror is used to determine exterior light conditions present at
the mirror. At night, with the automatic day-night feature enabled, the inside rearview
mirror will automatically darken to reduce glare from headlamps behind the vehicle.
In daytime conditions, the mirror operates at a normal, clear state due to
the high exterior light conditions that are indicated by the ambient light sensor.
When the vehicles gear selector is placed in the REVERSE position, backup lamp voltage
is supplied as an input to the inside rearview mirror. In night time conditions only,
the inside rearview mirror monitors the backup lamp voltage to disable the automatic
day-night feature. This allows the inside rearview mirror face to gradually change
to a normal, clear state and allow the driver to see objects in the mirror clearly
when backing up.
Inside Rearview Mirror with Automatic Day-Night Switch Operation
The inside rearview mirror with only the automatic day-night feature has 2 switches
that perform the following functions:
| • | The AUTO switch is used to enable the automatic day-night feature of the
inside rearview mirror. To enable the automatic day-night feature, turn the ignition
ON and depress the AUTO switch. A green indicator will illuminate on the inside rearview
mirror when the automatic day-night feature is enabled. |
| • | The OFF switch is used to disable the automatic day-night feature of the
inside rearview mirror. |
Inside Rearview Mirror with Automatic Day-Night and OnStar® Switch Operation
The inside rearview mirror with automatic day-night and OnStar features has
4 switches that perform the following functions:
| • | The on/off switch is used to enable/disable the automatic day-night feature
of the inside rearview mirror. To enable the automatic day-night feature, turn the
ignition ON and depress the on/off switch. A green indicator will illuminate on the
inside rearview mirror when the automatic day-night feature is enabled. To disable
the automatic day-night feature depress the on/off switch. |
| • | The three switches on the right side of the mirror are for OnStar®
operation. For more information, refer to
OnStar Description and Operation
in Cellular Communication. |
