Automatic Day-Night Mirror System Components
The automatic day-night mirror system consist of the following components:
| • | Driver outside rearview mirror |
Automatic Day-Night Mirror Operation
With the ignition switch in the ON position, ignition 3 voltage is supplied
through the IGN 3 RR 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, as the glare of the headlamps
from behind increases, the mirror gradually becomes darker in order
to absorb the glare. 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 inside rearview mirror 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 G402.
The inside rearview mirror supplies a low reference circuit and a signal
circuit to the driver outside rearview mirror. 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.
Automatic Day-Night Mirror Switches without Compass
The automatic day-night mirror has two switches that perform the following
functions:
| • | The AUTO switch is used to enable the automatic day-night feature
of the mirror. With the ignition in the ON position, depress the AUTO switch
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. |
| • | The OFF switch is used to disable the automatic day-night feature
of the mirror. |
Automatic Day-Night Mirror Switches with Compass (w/oOnStar®)
The automatic day-night mirror has two switches that perform the following
functions:
| • | The MIRROR switch is used to enable or disable the automatic day-night
feature of the mirror. With the ignition in the ON position, depress the
MIRROR switch 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 the MIRROR switch. |
| • | The COMPASS switch is used to turn the compass on and off. With
the ignition in the ON position, depress the COMPASS switch to turn the compass
on. Depress the COMPASS switch again to turn the compass off. The
COMPASS switch is also used to place the compass into a calibration
or zone mode. For more information, refer to
Compass Calibration and Magnetic Variance
. |
Automatic Day-Night Mirror Switch with Compass (w/OnStar®)
This is the on/off switch
for the automatic day-night mirror. The on/off switch is used to perform 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
. |
