Inside Rearview Mirror with the Automatic Day-Night Feature System Components
The inside rearview mirror with the automatic day-night feature system consists
of the following components:
• | Driver outside mirror with the automatic day-night feature |
Power and Ground of the Inside Rearview Mirror
• | With the ignition ON, ignition voltage is supplied to the mirror from
the HVAC 1 fuse in the I/P fuse block. |
• | Ground for the mirror is provided by G202. |
Inside Rearview Mirror with the Automatic Day-Night Feature System Operation
The inside rearview mirror uses 2 photocell sensors. One sensor is
the headlight sensor, located on the rear side of the mirror. The headlight sensor
is used to determine light conditions present at the mirror face. The other sensor
is the ambient light sensor, located on the front of the mirror or windshield side.
The ambient light sensor is used to determine light conditions present at the mirror.
With the automatic day-night feature enabled, the mirror uses the ambient light
sensor to determine the exterior light condition. With a low light condition detected,
and a high light condition from behind at the headlight sensor, the inside rearview
mirror will automatically darken the face of the mirror.
In the daytime, the mirror is in a normal state because of the high light
condition that is indicated by the ambient light sensor. With the gear selector
lever in the REVERSE position, backup lamp supply voltage is supplied as an input
to the inside rearview mirror. In night time conditions only, the mirror monitors
this input to disable the automatic day-night feature which allows the face to
gradually change to a normal state. This allows the driver to clearly see objects
in the mirror when backing up.
Driver Outside Rearview Mirror with the Automatic Day-Night Feature Operation
The drivers outside rearview mirror will also darken when the inside rearview
mirror darkens. The inside rearview mirror supplies a low reference circuit and a
signal circuit to the drivers outside rearview mirror. Refer to
Outside Mirror Description and Operation
in Doors for further description and operation of the driver outside
rearview mirror.
Switches of the Inside Rearview Mirror with the Automatic Day-Night Feature
The inside rearview mirror has 2 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. |