Inside Rearview Mirror with the Automatic Day-Night Feature System
Components
The inside rearview mirror with the automatic day-night feature system
consist of the following components:
| • | Driver outside rearview mirror with the automatic day-night feature |
Inside Rearview Mirror with the Automatic Day-Night Feature System
Operation
With the ignition switch in the ON position, accessory voltage is supplied
through the ACC fuse to the inside rearview mirror. The inside rearview mirror
uses 2 photocell sensors in order to determine light conditions
in the front and the back of the vehicle. At night, with the automatic
day-night feature enabled, the mirror automatically darkens to
reduce the glare from the headlamps from behind. In the daytime,
the mirror is in a normal state. With the gear selector lever
in the REVERSE position, backup lamp supply voltage is
supplied as an input to the inside rearview mirror. The mirrors
will gradually change to a normal state as a result of
the backup lamp supply voltage input. Ground for the inside rearview
mirror is provided by G400.
The inside rearview mirror supplies a low reference circuit and a signal
circuit to the driver outside rearview mirror with the automatic day-night
feature. Refer to
Outside Mirror Description and Operation
in Doors for further description
and operation of the driver outside rearview mirror.
Compass
The electronic compass includes a magnetic field sensor and a microprocessor.
The microprocessor receives inputs from the sensor, processes these inputs,
and provides a heading on the compass display.
Switches of the Inside Rearview Mirror with the Automatic Day-Night
Feature and Compass
The inside rearview mirror has four switches that perform the following
functions:
| • | The on/off switch located at the left side of the mirror performs
the following functions: |
| - | To enable or disable the automatic day-night feature of the mirror.
With the ignition in the ON position, depress and hold the on/off switch for
4 seconds to enable the automatic day-night feature of the
mirror. A green indicator will illuminate on the mirror
when the automatic day-night feature is enabled. To disable
the automatic day-night feature of the mirror, depress and
hold the on/off switch for 4 seconds. |
| - | To turn the compass on and off. With the ignition in the ON position,
depress the on/off switch to turn the compass on. Depress the on/off switch
again to turn the compass off. The on/off switch is also used
to place the compass into a calibration or zone mode. For
more information, refer to
Compass Calibration and Magnetic Variance
. |
| • | 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 Communications. |
