Sunlight Sensor

Sunlight Sensor

The sunlight sensor consists of two photoelectric cells that provide the ATC (automatic temperature control) module with inputs of light intensity, one as sensed coming from the left of the vehicle and one as sensed coming from the right. The inputs are a measure of the solar heating effect on vehicle occupants and used by the ATC (automatic temperature control) module to adjust blower speed, temperature and distribution to improve comfort. The sensor is installed in the center of the fascia upper surface.

If one of the photoelectric cells is faulty, the output from the other photoelectric cell is used for both sides of the vehicle. If both photoelectric cells are faulty, the ATC (automatic temperature control) module uses a default value of zero.