Humidity sensor diagnostic method using condensation clearing heater

摘要

A diagnostic method for a capacitive humidity sensor comprising a heater, and a capacitance-sensing element that individually identifies heater, temperature-sensing element, or capacitance-sensing element degradation. By this method, individual elements of the sensor may be replaced or compensated for to allow for further operation.

主权项

1. A method, comprising
operating a sensor in an engine intake, a passage of the sensor including a temperature-sensing element, a heater, and a capacitance-sensing element; and individually distinguishing between each of heater, temperature-sensing element, and capacitance-sensing element degradation.