| 摘要 |
The device comprises a control circuit (2) integrating a power transistor (4) controlling the electrical power supply of a load (3), detectors (7, 8, 9) and a logic circuit (10) connected to a computer (1) by two lines (I/0) and (SEL). According to the invention, the computer selectively and successively controls, by specific combinations of logic signals applied on the lines (I/0) and (SEL), several logic sub-circuits for the detection and identification of functional faults in the power supply circuit of the load (permanent control, short-circuit, open circuit), the circuit (2) in return imposing on the line (I/0) logic levels representative of the presence or absence of faults, during time intervals in which the computer is configured to read these levels. Application to the diagnosis of the functional status of electro-valves forming part of a wheel anti-locking device on a vehicle.
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