Subaru Forester 2.5X 2003 Technicians Reference Booklet page 25

2003 New Model Update
A single wire carries the commands from the 3
buttons to the VIU. The 2 color led is controlled
by a different set of wires.
Each button of the 3 Button Module, when
pushed, supplies a different resistance value to
the wire supplying the input to the VIU. The VIU
will perform the commands that match that
resistance value. Two wires and a ground control
the red/green led. The green illumination control
uses 3 volts and the red illumination control uses
2.5 volts.
Also contained in the 3 Button Module are the
LEDs for each button, which are on when the
system is ready to operate.
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The SRS Air Bag System provides two types of
input signals to the VIU, normal and deployed.
The normal signal prevents the VIU from
illuminating the trouble indicator (2 colored led).
The deployed signal will result in the VIU
outputting a signal to the VCU. The VCU will
then make an emergency cellular phone call to
OnStar. OnStar will then call the vehicle. If no
response from the vehicle is received emergency
vehicles are dispatched to the vehicles location.
If the driver pushes the answer button when
receiving the cellular phone call from OnStar the
driver can decide if emergency vehicles are
required. An emergency phone call to OnStar can
be made by the driver themselves by pushing
the emergency button and request services
needed.
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(912) Legacy
91
June 2002