ELECTRONIC CONTROL UNIT

摘要

An electronic control unit includes a controller configured to interrupt a failsafe relay for a predetermined time period while an external load, such as an electric servo motor, is in a non-operating state and to perform a diagnosis of a short-circuit fault, which may occur at a load power supply line, based on a difference between a first voltage applied to a positive power supply line and a second voltage applied to the load power supply line.

主权项

1. An electronic control unit comprising:
a failsafe relay connected via a first line to an on-vehicle battery and configured to interrupt electric power supply to a load connected via a second line to the failsafe relay; a capacitive element connected at one end thereof to the second line and grounded at an opposite end thereof; and a controller that monitors respective voltages of the first line and the second line on both sides of the failsafe relay, wherein the controller diagnoses a short-circuit fault, which may occur at an arbitrary part of the second line, based on a difference between a first voltage of the first line and a second voltage of the second line when the failsafe relay is interrupted for a predetermined time period while the load connected to the second line is in a non-operating state.