Abstract: A code wheel (32) is rotatable with a vehicle steering wheel (12). A magnet (78) mounted on a rotatable driven component (34) indicates the number of revolutions of the code wheel (32). A sensing device (74) is provided to sense a flux field provided by the magnet (78). The magnetic flux field varies relative to the sensing device (74) as the driven component (34) is rotated by the code wheel (32).

Abstract: A remote keyless entry system stores critical data for synchronization in a plurality of memory locations at the receiver. When a transmission is received, the received data is validated using the critical data from a first memory location. In the event that the data in the first memory location is determined to be unusable, the critical data from a second memory location is used. The critical data is rewritten at the first memory location only if the transmission is ultimately determined to be valid.

Abstract: Loads, such as power relays controlling wipers, windows and lights are connected to an automobile battery through individual transistor drives that are controlled by a microcontroller. A switch, connected to the microcontroller, is operated to activate each drive. The microcontroller checks the load characteristic when each drive is activated and inactivated. When the load is inactivated, it is part of a resistance network producing a test voltage that is digitally converted and supplied to the microcontroller, which compares the test voltage to a stored voltage to determine if the load is correct. An analog multiplexer is controlled by the microcontroller to select the voltage produced for each load.

Abstract: Loads, such as power relays controlling wipers, windows and lights are connected to an automobile battery through individual transistor drives that are controlled by a microcontroller. A switch, connected to the microcontroller, is operated to activate each drive. The microcontroller checks the load characteristic when each drive is activated and inactivated. When the load is inactivated, it is part of a resistance network producing a test voltage that is digitally converted and supplied to the microcontroller, which compares the test voltage to a stored voltage to determine if the load is correct. An analog multiplexer is controlled by the microcontroller to select the voltage produced for each load.

Abstract: A memory mirror system having a mirror 19, two constant speed motors 16,18 each controlling an axis of mirror movement, position feedback signals 26,28 from each motor, switch inputs 12, a diagnostic push button 40, and an electronic controller 10, is provided with a diagnostic procedure after a self-test push button 40 has been depressed by automatically driving the mirror to the center of movement when manual movement is not requested, thereby allowing system level failures, such as position feedback sensor failures, to be detected quickly by visual inspection of mirror movement as the mirror attemps to return to the origin, without altering existing memory settings or disconnecting the controller 10 from the system. When manual movement is not requested for a predetermined period of time, the diagnostic procedure is prevented from running.

Abstract: A memory mirror system having a mirror 19 mounted within concave-shaped mirror movement boundaries, two constant speed motors 16, 18 each controlling an axis of mirror movement, position feedback signals 26,28 from each motor, push button inputs 12 and an electronic controller 10, is provided with automatic mirror repositioning that drives the mirror from a start position to a memory position in minimum time without colliding with any mirror movement boundaries by driving the mirror position toward the target along the axis farthest from the target and driving the mirror toward the origin along the other axis until the mirror position is within a predetermined safe region along that axis or the current position is 45 degrees from the target, then driving the mirror in the direction of the target along an axis for which the distance to the target is not less than the distance to the target along the other axis or in which the direction toward the target is also toward the origin.

Abstract: A "memory" mirror system having a mirror 19 mounted within convex-shaped mirror movement boundaries, two constant speed motors 16,18 each controlling an axis of mirror movement, position feedback signals 26,28 from each motor, push button inputs 12 and an electronic controller 10, is provided with automatic mirror repositioning that drives the mirror from a start position to a "memory" position in minimum time without colliding with any mirror movement boundaries by turning ON the motor, in the direction of the target, whose movement axis is the greatest distance from the target and turning ON the other motor, in the direction of the target, if the direction toward the target is also toward the center of the mirror movement pattern (i.e., away from the nearest boundary).