Patent ID: 8019510

Claim:
A seat belt system comprising: a seat belt; a retractor capable of retracting the seat belt; and a controller operably coupled with the retractor to control movement of the seat belt, wherein the controller is configured (a) to receive a command to enter a stop mode; (b) to switch off a first set of components of the controller to enter a low power mode of operation; (c) after expiration of a first time period, to switch on a first component of the first set of components to check for expiration of a second time period; (d) to monitor for movement of the seat belt; (e) if no belt movement is detected, repeating (b)-(d) until expiration of the second time period; and (f) if no belt movement is detected before expiration of the second time period, to switch off the first set of components of the controller to enter a sleep mode of operation.