Part 2

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.

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 name tag 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)

Note: Do not disconnect the main vehicle battery or remove the telematics communication interface control module fuse with the ignition key in any position other than OFF. Disconnecting power to the telematics communication interface control 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 module so an emergency notification call can be made after a vehicle collision where the main battery is disabled. Once the Back-Up Battery is activated it will stay on until it has completely discharged. The back-up battery is not rechargeable and once activated 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 module in the event of a vehicle collision 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 16V and 9V throughout this period. This allows the battery to power the basic functions of the telematics communication interface module for least one 200 second (5 minute) call at the end of the 4 year span, should a main vehicle battery loss collision occur.

The back-up battery is connected to the telematics communication interface 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 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 module.

Audio System Interface

When the OnStar(R) requires audio output, a serial data message is sent to the audio system to mute all radio functions and transmit OnStar(R) originated audio. The OnStar(R) audio is transmitted to the vehicle audio system by a dedicated signal circuit and a low reference circuit.

The audio system will mute and an audible ring will be heard though the speakers if the vehicle receives a call with the radio ON.

On some vehicles, the HVAC blower speed may be reduced when the OnStar(R) system is active to aid in reducing interior noise. When the system is no longer active, the blower speed will return to its previous setting.

OnStar(R) Sleep Cycle

The OnStar(R) system uses a unique sleep cycle to allow the system to receive cellular calls while the ignition is in the OFF position and retained accessory power mode has ended. This cycle enables the telematics communication interface module to perform remote functions, such as door unlock, as commanded over the air by the OnStar(R) Call Center, and to continue to maintain an acceptable level of battery electrical drain.

The OnStar(R) system uses 4 states of readiness, depending upon the type of cellular market the vehicle is in when the ignition is put into the OFF state:

* High power
* Low power
* Sleep
* Digital standby

The high power state is in effect whenever the ignition is in the ON or RUN position, or retained accessory power is enabled, and the OnStar(R) system is sending or receiving calls or when the system is performing a remote function.

The low power state is in effect when the OnStar(R) system is idle with the ignition in the ON or RUN position, or with retained accessory power enabled.

The sleep state is entered after the vehicle has been shut off and the retained accessory power has timed out while in an analog cellular area. At a predetermined time recorded within the telematics communication interface module, the system re-enters the low power state to listen for a call from the OnStar(R) Call Center for 1 minute. After this interval, the system will again return to the sleep state for 9 minutes. If a call is sent during the 1 minute interval, the OnStar(R) system will receive the call and immediately go into the high power mode to perform any requested functions. If no call is received during the 1 minute interval, the system will go back into the sleep mode for another 9 minutes. This process will continue for up to 48 hours, after which the OnStar(R) system will turn off until the ignition is turned to the ON or RUN position.

The digital standby power state is entered after the vehicle has been shut off and the retained accessory power has timed out while in a digital cellular area. When in digital standby mode, the OnStar(R) module is able to perform all remote functions as commanded by an OnStar(R) advisor at any time, for a continuous 48 hours. After 48 hours, the OnStar(R) module will go into sleep mode until a wake up signal from the vehicle is seen by the telematics communication interface module. If the OnStar module loses the digital cellular signal it will revert to analog mode and follow the standard sleep state (9 minutes OFF, 1 minute standby) based on the time of the GPS signals, this will continue until a digital cellular signal is again received.

If the OnStar(R) system loses battery power while the system is in a standby or sleep mode, the system will remain OFF until battery power is restored and the ignition is turned to the ON or RUN position.

Features

OnStar(R) Personal Calling

The hands free, OnStar(R) personal calling cellular phone feature is an additional feature of the OnStar(R) system. This feature is embedded within the telematics communication interface module; however it must be activated by an OnStar(R) advisor. OnStar(R) personal calling operates similar to most hand held cellular phones in that the availability for its usage is based on minutes or units. The customer must have a current OnStar(R) subscription, as this feature cannot be utilized without it. To use OnStar(R) personal calling, the customer must also purchase units (minutes) as outlined in the owners guide provided with the OnStar(R) system. Units begin to deplete, 1 unit is equal to 1 minute, as the customer makes outbound phone calls, answers inbound phone calls, or while connected to the OnStar(R) virtual advisor. In addition, units may also have an expiration date, depending upon the type of units purchased.

Customers have the ability to store telephone numbers within the module, referenced by a name tag for the convenience of frequently dialed numbers. After storing a name tag, the user can dial this number by initiating the OnStar(R) personal calling feature, speaking the word "call," and repeating the name tag assigned.