Automatic Day-Night Mirror System Components
The automatic day-night mirror system consist of the following components:
| • | An inside 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, 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 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.
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 (w/o OnStar®)
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 (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
. |
