Control module, OnStar (673)
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Control module, OnStar (673)
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4D
5D
The unit contains a mobile phone as well as a GPS receiver and is connected to the radio, microphone, control panel, GPS/mobile phone antenna as well as data link connector via the car's wiring harness. The unit is equipped with a 12-pin and a 16-pin connector as well as an antenna connection.
The main functions of the system are as follows:
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To communicate voice and data over the mobile phone network.
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To receive data signals from the GPS and the calculation of the car's position. The position of the car is sent using data communication to the OnStar Call Center.
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To send a bus message to activate the car's horn and hazard warning lights.
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To receive bus messages when airbags are deployed in order to automatically phone for assistance.
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To relay telephone conversations via the system speakers.
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To switch off other sound from the audio system when making a telephone call. This is effected by feeding a "mute" signal from the OnStar unit to the audio unit which then disconnects the normal audio inputs to the speakers and the signal to any external amplifiers.
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Diagnostic communication.
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