Electrical module unit for use in vehicle, has voltage single wire feed line representing power supply and signal line, where checking of function is characterized by current drain and impedance of active operating conditions

摘要

The unit has a single-wire sensor (5) and a voltage single wire feed line representing a power supply and a signal line. Controlled change of power supply causes the switching of operating modes by a timing diagram. Checking of the function is characterized by a current drain and an impedance of active operating conditions. Voltage is raised or lowered in a programming operation. Parameters and or software are exchanged in a functional state. Diagnosis is switched by lowering the voltage and pulse width change of the operating conditions.