Honda Motor Co., Ltd.
Steering wheel unit

Abstract:

A steering wheel unit is equipped with an electrode which is provided on a steering wheel and constitutes an electrostatic capacitance sensor, a sensor circuit that passes an alternating current to the electrode, a comprehensive control unit adapted to energize the sensor circuit at a time of failure diagnosis, and a failure diagnosis unit that performs a short circuit failure diagnosis continuously or periodically when a power source of a vehicle is on, and performs an open circuit failure diagnosis when the power source of the vehicle is switched from off to on.