Part 2
The GPS antenna is used to collect the signals of the orbiting GPS satellites. Within the antenna is housed a low noise amplifier that allows for a more broad and precise reception of this data. The antenna is connected at the base to a coax cable that plugs directly into the telematics communication interface control module. The cable also provides a path for DC current for powering the antenna.
The OnStar(R) Call Center also has the capability of communicating with the vehicle during an OnStar(R) call to retrieve the latest GPS location and transmit it to the OnStar(R) Call Center. A history location of the last recorded position of the vehicle is stored in the module and marked as aged, for as long as the module power is not removed. Actual GPS location may take up to 10 minutes to register in the event of a loss of power.
OnStar(R) RemoteLink
OnStar(R) RemoteLink is a mobile app to link mobile devices to a vehicle for limited diagnostics and feature controls. After downloading the app and registering the device, vehicle owners with an eligible vehicle can use their mobile devices to access real-time data from their vehicle and perform specific commands remotely.
All communication between the app and the vehicle is powered by OnStar's(R) advanced connected vehicle technology. An active OnStar(R) account as well as a valid OnStar(R) username and password are required to use the app. The remote commands must be enabled by logging into the user's OnStar(R) account prior to using the app.
Vehicle Control Features
* Lock/Unlock doors
* Start vehicle remotely
* Activate your Horn & Lights
* Contact an OnStar Advisor, Roadside Assistance or your Preferred Dealer
Available Vehicle Data:
* Real-time fuel information, including fuel range, fuel remaining, and lifetime MPG
* Lifetime mileage
* Remaining oil life
* Current tire pressure information
* OnStar(R) account information
Compass Heading
The telematics communication interface module has a compass feature to calculate vehicle direction which is displayed via the instrument panel cluster or designated display. The compass heading is determined by dead reckoning until the GPS 3d fix is established. The dead reckoning is accomplished by using the yaw rate sensors and wheel ticks to determine heading changes from a GPS known heading. The GPS 3d fix heading is determined by the deferential of two locations.
Bluetooth(R) (If Equipped)
Bluetooth(R) wireless technology is a short-range communications technology intended to replace the cables connecting portable and/or fixed devices while maintaining high levels of security. Only vehicles with steering wheel controls will have Bluetooth(R) functionality. In order to utilize the vehicle's Bluetooth(R) system, a Bluetooth(R) equipped cellular phone is required.
The Bluetooth(R) antenna is a small fixed antenna connected directly to the telematics communication interface control module and is used to send and receive signals from a Bluetooth(R) enabled cellular phone. The antenna utilizes no cabling and is not external to the vehicle. The available features and functions are determined by the software within the device being used and the telematics communication interface control module. The operating range of the signal from the vehicle is approximately 30 feet. Note that the operating range is dependent upon the cellular phone being used and battery level of the phone.
With Bluetooth(R) technology customers can experience hands-free calling as their Bluetooth(R) capable cellular phones are wirelessly connected to the vehicle. It will allow customers to place and receive calls using the steering wheel controls and voice recognition. The vehicle audio system will allow you to listen to your call through the vehicle speakers and adjust volume through steering wheel or radio controls.
Not all Bluetooth(R) cellular phones are guaranteed to work with the vehicle's Bluetooth(R) system. Based on the cellular phone's service provider and the manufacturer's implementation of Bluetooth(R), not all phones support all available Bluetooth(R) functionality. Bluetooth(R) enabled cellular phones will be tested for vehicle compatibility and a feature compatibility list will be provided via the GM Bluetooth(R) website: http://www.gm.com/vc/bluetooth/
Bluetooth(R) Features Supported
The following is a list of features supported by the Bluetooth(R) system. Note that not all devices will support all of the listed functions.
* Automatic reconnection - highest priority phone will automatically be connected to vehicle when vehicle ignition is on
* Hands-free dialing- via digits, redial, name tags (phone number saved to a nametag via voice recognition)
* Answering a call
* Ending a call
* Mute a Call
* Rejecting a call - ignore an incoming call
* Call Waiting
* Three-way Calling - initiated from hands-free system
* Send Number During a Call - this is used when calling a menu-driven phone system
* Transfer a Call - transfer call from vehicle to cellular phone and visa versa
* Voice Pass-Thru - allow access to the voice recognition commands on the cellular phone
Pairing a Bluetooth(R) Cellular Phone to the Vehicle
In order to use hands-free calling, the cellular phone must be paired to the vehicle. Up to five devices can be paired to the vehicle at one time, but only one can be connected at any given time. To pair a phone, the customer must know how to operate the Bluetooth(R) functionality of their phone. The pairing process must only be done one time for each phone, unless that phone's information is deleted. For safety reasons, the pairing process is disabled while the vehicle is moving.
Once the Bluetooth(R) cellular phone has been paired with vehicle, it will automatically connect to the vehicle when the ignition is on and the device is on. When more than one paired phone is in the vehicle, the phone with the highest priority will be connected. If the cellular phone is in use while getting into the vehicle, the phone can be switched to hands-free mode with the press of a button. In addition, a call in progress can be transferred from the vehicle hands-free mode to the phone to continue the call as the customer exits the vehicle.
Complete pairing instructions are provided in the Vehicle Owners Manual.
Back-up Battery (If Equipped)
Important: Do not disconnect the main vehicle battery or remove the OnStar(R) fuse with the ignition key in any position other than OFF. Disconnecting power to the OnStar(R) module in any way while the ignition is ON or with retained accessory power activated may cause activation of the OnStar(R) Back-Up Battery. This action is per design as the back-up battery is designed to provide power to the telematics communication interface control module so an emergency notification call can be made after an event where the main battery is disabled. Once the Back-Up Battery is activated it will stay on until the power is restored back to the telematics communication interface control module. The telematics communication interface control module naturally chooses the main supply voltage as it's default supply, but if the main supply is removed or lost for any reason the OnStar(R) module will use the Back-Up Battery as a power supply as long as the default supply can not be detected. The back-up battery is not rechargeable and once discharged below 9.5 volts the back-up battery must be replaced.
Certain OnStar(R) equipped vehicles may also be equipped with a back-up battery. The back-up battery is a non-rechargeable, lithium battery intended to provide an auxiliary power source for the telematics communication interface control module in the event where power from the main vehicle battery is lost.
The back-up battery is intended to have a limited life span of approximately 4 years and is designed to maintain an open circuit voltage between 16 V and 9 V throughout this period. This allows the battery to power the basic functions of the telematics communication interface control module for least one 200 second (5 minute) call at the end of the 4 year span, should the main vehicle battery be lost. In the case of a vehicle losing vehicle battery power, OnStar will switch over to the backup battery based on an internal algorithm. It will look for an air-bag deploy, or near-deploy, messages from the SDM. If there are no messages the OnStar module will stay wake for a few minutes longer and monitor the buttons in the mirror. If not pressed, the modules will power down and shut off completely.
The back-up battery is connected to the telematics communication interface control module through the back-up battery positive voltage circuit and back-up battery ground circuit and is protected from a short circuit by means of an internal fuse. In the event the back-up battery, battery positive voltage circuit is shorted to the back-up battery ground circuit or chassis ground, the fuse will open and render the back-up battery permanently inoperable. The status of the back-up battery and its associated wiring is monitored by the telematics communication interface control module.