This OnStar® system consists of the following components:
This system also interfaces with the factory installed vehicle audio system.
The telematics communication interface control module is a cellular device that allows the user to communicate data and voice signals over the national cellular network. Power is provided by a dedicated, fused B+ circuit. Ground is provided through the vehicle wiring harness attached to the module. The ignition state is determined by the telematics communication interface control module through serial data messaging.
Dedicated circuits are used to connect the telematics communication interface control module to a microphone, the button assembly, and to command the status LED. The telematics communication interface control module communicates with the rest of the vehicle over the serial data bus.
The module houses 2 technology systems, one to process GPS data, and another for cellular information. The cellular system connects the OnStar® system to the cellular carrier’s communication system by interacting with the national cellular infrastructure. The module sends and receives all cellular communications over the cellular antenna and cellular antenna coax. GPS satellites orbiting earth are constantly transmitting signals of their current location. The OnStar® system uses the GPS signals to provide location on demand.
The module also has the capability of activating the horn, initiating door lock/unlock, or activating the exterior lamps using the serial data circuits. These functions can be commanded by the OnStar® Call Center per a customer request.
The telematics communication interface control module supplies 10 volts to the OnStar® button assembly on the keypad supply voltage circuit. When pressed, each button completes a circuit across a resistor allowing a specific voltage to be returned to the telematics communication interface control module on the keypad signal circuit. Depending upon the voltage range returned the telematics communication interface control module is able to identify which button has been pressed.
The OnStar® status LED is located with the button assembly. The LED is green when the system is ON and operating normally. When the status LED is green and flashing, it is an indication that a call is in progress. When the LED is red, this indicates a system malfunction is present. In the event there is a system malfunction and the OnStar® system is still able to make a call, the LED will flash red during the call.
If the mirror has the rear vision camera disp
Safety Belt Pretensioners
This vehicle has safety belt pretensioners for front outboard occupants. Although
the safety belt pretensioners cannot be seen, they are part of the safety belt assembly.
They can help tighten the safety belts during the early stages of a moderate to
severe frontal, near frontal, or rear crash ...
Front End Inflatable Restraint Discriminating Sensor Replacement
Front End Inflatable Restraint Discriminating Sensor Replacement
Callout
Component Name
Warning: Refer to SIR Warning.
Warning: Refer to SIR Inflator Module Handling and Storage
Warning.
Warning: ...
Cooling Fan Description and Operation (LUV)
The engine cooling fan system is composed of one cooling fan, a series of 5 relays,
the engine control module (ECM), and the associated wiring. The cooling fan assembly
includes two resistors. This combination of components enables the ECM to operate
the cooling fan at 3 speeds usi ...