The OnStar system offers customers a variety of different
services such as, communication, navigation, security, and customer assistance
features. These are made possible by the national cellular telephone infrastructure,
the military GPS navigation system, the OnStar Call Center, and the vehicle
installed OnStar equipment. The vehicle installed equipment is referred to
as the Vehicle Communication Platform ( VCP ). The VCP includes a cellular
phone, cellular data modem, and GPS receiver. The VCP sends and receives
Class 2 data through the Vehicle Interface Unit ( VIU ) in order to communicate
with other Class 2 modules.
| | Driver calls the Call Center and asks for unlock ( or lock ) signal
to be sent to the vehicle. The VCP then sends a class 2 signal via the VIU
to the Body Control Module ( BCM ) to unlock or lock the doors |
| | Driver calls the Call Center requesting the lights/horn to be cycled
to aid in finding car in parking lot. The VCP then sends a class 2 signal
via the VIU to the BCM to operate the lights/horns. |
| | Driver calls the Call Center requesting the current vehicle location
and directions to his desired destination. |
| • | Roadside assistance key press
|
| | Driver dials the Call Center with a single key press. |
| | Driver dials the Call Center with a single key press |
| • | Air bag deployment detection
|
| | Following a air bag deployment, the inflatable restraint sensing and
diagnostic seat belt pretensioner module sends a class 2 signal to the BCM,
that a deployment has occurred. The body control module sends a class 2 signal
to the VCP via the VIU, the VCP automatically notifies the Call Center an
accident has occurred. The Call Center will respond by attempting to call
the accident vehicle on the cellular phone. If the driver does not answer,
the Call Center contacts the nearest 911 number with an accident report and
the GPS vehicle location. |
| | Following the detection of an unauthorized entry by the vehicle's theft
deterrent detection system, the BCM sends a class 2 signal via the VIU to
the VCP. The VCP will automatically send a data message to the Call Center.
The call center will then contact the local authorities, while continuing
to track the vehicle location via GPS data. |
The OnStar System is a new on-vehicle communications system which is
a dealer installed option. Fuse #28 supplies B+ to the Onstar system's, Vehicle
Communication Platform ( VCP ) at all times. Ground for the VCP is supplied
at all times by G201 through terminal 2 of the Cellular Phone connector.
The Class 2 comunication line between the VCP and the vehicle architecture
is located on terminal 3 of the cellular phone connector. For additonal information
concerning system operation and diagnosis refer to the OnStar
manual.
