Part 2

OnStar Description and Operation Part 2

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 vehicle 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 vehicle 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 vehicle 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 vehicle 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 nametag for the convenience of frequently dialed numbers. After storing a nametag, the user can dial this number by initiating the OnStar(R) personal calling feature, speaking the word "call," and repeating the nametag assigned.

Customers have the capability to lock their OnStar(R) personal calling system by pressing the answer/end call button, speaking "security" and entering a 4-digit code. Once this process is complete, the user must enter the code before OnStar(R) personal calling is available. In the event the customer cannot remember their code and is unable to use their system, they can press the blue OnStar(R) button and speak to an advisor to unlock the system by means of a discrete cellular call to the vehicle.

Turn by Turn Navigation

Turn by Turn Navigation allows the driver to contact OnStar(R) to obtain directions for driving from a current location to a desired location. The Turn by Turn Navigation system stores your planned route and continually checks your position along that route, when you deviate from the planned route, the system will recognize this and prompt the driver with verbal prompts for how to proceed. The driver then responds verbally to direct the system to continue the current routing or to recalculate the route because of a missed turn. On some vehicles, the Turn by Turn Navigation instructions may be displayed to the driver in the radio display or the driver information center.

OnStar(R) Stolen Vehicle Slowdown (If equipped)

OnStar(R) Stolen Vehicle Slowdown allows advisors working with law enforcement services to send a signal to limit fuel flow to the engine, gradually slowing down the stolen vehicle.

Stolen Vehicle Slowdown is an enhancement to OnStar's Stolen vehicle Location Assistance, which uses Global Positioning Technology to pinpoint the location of a vehicle reported stolen. Stolen Vehicle Slowdown is powered by OnStar's new generation of hardware (Generation 8).