Patent ID: 8543289

Claim:
An aftermarket telematics system for use with a vehicle having a vehicle bus, the aftermarket telematics system comprising: an aftermarket telematics unit configured to be mounted to the vehicle, to communicate with the vehicle bus, and to detect when the vehicle has been turned off; and a vehicle communication interface device configured to connect to the vehicle bus, to be communicatively coupled with the aftermarket telematics unit, and to facilitate communication between the aftermarket telematics unit and the vehicle bus, wherein the aftermarket telematics unit is further configured to send a sleep command to the vehicle communication interface device when the aftermarket telematics unit detects that the vehicle has been turned off and wherein the vehicle communication interface device is configured to sleep in accordance with the sleep command and wherein the aftermarket telematics unit is further configured to sleep after the aftermarket telematics unit detects that the vehicle has been turned off and after sending the sleep command to the vehicle communication interface device.