Mirrors 2-51
Rearview Camera Full Display Mirror Block Diagram
4433072
Outside Mirror Description and
Operation
Power Mirror System Components
The power mirror system consists of the following
components:
• Body Control Module
• Driver Seat Adjuster Memory Module
• Outside Mirror Switch
• Passenger Window Switch
• Left Outside Rearview Mirror
• Right Outside Rearview Mirror
Power Mirror System Controls
The outside rearview mirror switch is part of the S79D
Driver Front Side Door Window Control Switch and
uses serial data to control the passenger mirror through
the S79P Passenger Front Side Door Window Control
Switch. Each S79 Side Door Window Control Switch
has it own 12V, ground and data communications
circuit along with mirror directional control and mirror
fold circuits.
Driver Mirror Controls
The S79D Driver Front Side Door Window Control
Switch has internal connections for the driver mirror.
When the mirror position switch is active the driver
mirror is commanded to move through bi-directional
motor control circuits. The motor control circuits are
floating while in an inactive state and the switches will
apply power and ground to the control circuits as
necessary to move the mirror in the commanded
direction.
Passenger Mirror Controls
The S79D Driver Front Side Door Window Control
Switch uses serial data circuits to communicate the
active states for the passenger mirror switch to the
S79P Passenger Front Side Door Window Control
Switch. The S79P Passenger Front Side Door Window
Control Switch has internal connections for the
passenger mirror. When the mirror position switch is
active the passenge r mirror is commanded to move
through bi-directional motor control circuits. The motor
control circuits are floating while in an inactive state
and the switches will apply power and ground to the
control circuits as necessary to move the mirror in the
commanded direction.
Mirror Position
Mirror position is determined by both horizontal and
vertical position sensors in each of the power mirrors.
Each S79 Front Side Door Window Control Switch
supplies a 5 V reference, low reference, and horizontal
and vertical position signal circuits to these sensors.
The signal circuits are referenced from 5 V by the
S79 Front Side Door Window Control Switch and the
signal circuit voltage levels represent the mirror
positions. The mirror positions are stored in each
2022 - Silverado 1500 (New) Electrical Body Builder Manual
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