Abstract: A method for controlling the temperature of two or more zones inside a vehicle using an HVAC system. In one aspect, a method for controlling temperature inside a vehicle is provided that comprises determining a power for a first zone of the vehicle and determining a discharge air temperature for one of the first zone and a second zone of the vehicle using a mass transfer between the first zone and a second zone of the vehicle. In another aspect, a method for controlling temperature inside a vehicle is provided that comprises determining a power for a first zone and a third zone of the vehicle, determining a mass transfer in a second zone of the vehicle, and determining a discharge temperature for one of the first zone, second zone, and third zone of the vehicle based on a mass transfer between two zones of the vehicle.

Abstract: A diagnostic system for detecting when one or more temperature sensors as found in motor vehicle climate control systems are invalid. The system works at extreme temperature conditions and functions to distinguish between sensor faults such as open or short circuits and true sensor temperature readings, which could be, misinterpreted as faulty readings. In particular, combinations of ambient temperature sensors, in-car-temperature sensors and evaporator air temperature sensors are tested by the diagnostic algorithm to make such determinations.

Abstract: An air handling system includes at least two doors to control the flow of air to achieve a selected mode. A first door travels through a first path, and a second door travels through a second path which intersects the first path. A first final position is determined for the first door and a second final position is determined for the second door to achieve the selected mode. It is determined whether the two doors will collide when traveling to the respective final door positions and it is determined whether both doors could be closed simultaneously while rotating to the final positions. A relief door is maintained at a partially open position.

Abstract: A method and system are provided to control a heated area for a glass surface on a motor vehicle. The method and system sense the ambient temperature, determine whether the vehicle charging system is operating within a first predetermined voltage level, and disable the heated area if the charging system voltage is outside the first predetermined level.

Abstract: A method and system for controlling a heating, ventilation and air-conditioning (HVAC) system of a vehicle to prevent fogging of a windshield of the automotive vehicle is provided. The method and system include a determination of whether the vehicle has been recently turned "off", and upon determining the vehicle has been recently turned "off", commanding the HVAC system to a floor mode.

Abstract: A method and system for controlling a heating, ventilation and air-conditioning (HVAC) system of a vehicle to prevent fogging of a windshield of the automotive vehicle is provided. The method and system include determination of whether the vehicle has been recently turned "on" and preventing the HVAC system from directing air flow toward the windshield for a first predetermined time period after it has been determined that the vehicle has recently been turned "on".