KeyPass System Description and Operation: Notes

KeyPass is a remote vehicle entry and starting system that allows an operator to use a mobile device, such as a smartphone, as a virtual vehicle key, incorporating all functions associated with a traditional vehicle key. KeyPass communication between the vehicle and the mobile device use Bluetooth Low Energy. Bluetooth Low Energy operates in the 2.400 - 2.4835 GHz frequency band and utilizes frequency hopping to counteract narrowband interference issues. The vehicle is equipped with a K183 UHF Short Range Low Energy Remote Control Access Transceiver and four B342 UHF Short Range Low Energy Control Access Transceivers. The K183 UHF Short Range Low Energy Remote Control Access Transceiver is a control module the communicates with the vehicle on Low Speed GMLAN and also communicates with each B342 UHF Short Range Low Energy Control Access Transceiver via LIN in a master/slave orientation. The B342 UHF Short Range Low Energy Control Access Transceivers are short range transceivers, able to transmit and receive information with a mobile device via Bluetooth Low Energy, located strategically around the perimeter of the vehicle to ensure complete coverage of the vehicle. The K183 UHF Short Range Low Energy Remote Control Access Transceiver is also a Bluetooth Low Energy transceiver and monitors the interior of the vehicle. The K183 UHF Short Range Low Energy Remote Control Access Transceiver is typically located in the interior of the vehicle, in a centralized location such as the center console, to ensure maximum interior coverage. The B342 UHF Short Range Low Energy Control Access Transceivers are located on the vehicle exterior, typically near each vehicle corner, to maximize approach detection coverage of the vehicle's exterior, up to 70 m (230 ft).

To use the KeyPass system, a mobile device must first be paired with the vehicle. Refer to the vehicle owner's manual for instructions on pairing a mobile device for KeyPass use. A paired device can be used for active remote functions, passive remote functions, and visual display for vehicle information. In operation, the vehicle uses the K73 Telematics Communication Interface Control Module and the OnStar system to communicate with the OnStar enterprise center. OnStar acts as a bridge, connecting the vehicle to the KeyPass enabled device over cellular through the OnStar enterprise center. If an active remote request is made or visual display for vehicle information is requested from the KeyPass device, communication occurs with the OnStar enterprise center over cellular data, which will then communicate with the vehicle and the active request will be requested to the vehicle or the desired information will be relayed back to the KeyPass device.

For passive keyless functions, the B342 UHF Short Range Low Energy Control Access Transceivers act as a form of geofence. When a paired KeyPass device is within the proximity of the vehicle (up to 70 m (230 ft), they will awaken the KeyPass device, which will begin communication with the OnStar enterprise center. For passive entry, a data exchange will occur between the KeyPass device and the B342 UHF Short Range Low Energy Control Access Transceivers, ensuring the KeyPass device is a learned and secure device. If this is confirmed, vehicle entry will be allowed at the driver door. Similarly, when starting the vehicle with a KeyPass device, a data exchange will occur between the KeyPass device and the K183 UHF Short Range Low Energy Remote Control Access Transceiver, ensuring the KeyPass device is learned and secure. With confirmation, vehicle starting will be allowed.

The KeyPass system uses the following components:

• K183 UHF Short Range Low Energy Remote Control Access Transceiver
• B342A UHF Short Range Low Energy Control Access Transceiver 1
• B342B UHF Short Range Low Energy Control Access Transceiver 2
• B342C UHF Short Range Low Energy Control Access Transceiver 3
• B342D UHF Short Range Low Energy Control Access Transceiver 4
• K73 Telematics Communication Interface Control Module