Malfunction diagnosing apparatus for electronic control system f

Details Malfunction diagnosing apparatus for electronic control system f Malfunction diagnosing apparatus for electronic control system f

1979-04-17

1981-01-20

Waring, Alvin H.

Communications: electrical

Selective

Having indication or alarm

340514, 340524, G08B 2900

Patent

active

042465664

ABSTRACT:
An apparatus for diagnosing a malfunction of an electronic control system including sensors for electrically sensing conditions of sensing points of a vehicle and an electronic calculation unit for determining an energizing condition of an actuator for controlling a vehicle operation in accordance with output signals from the sensors is disclosed. The malfunction diagnosing apparatus is inserted intermediate of wires which connect the sensors or the actuator and the electronic control system, and when a voltage or current level on any wire assumes a non-steady state, the malfunction diagnosing apparatus determines that a malfunction has occurred at a portion associated with that wire and memorizes and holds the occurrence of the malfunction.

REFERENCES:
patent: 3958240 (1976-05-01), Richardson
patent: 4118688 (1978-10-01), Glennon

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