Method and apparatus for transmitting signals

Details Method and apparatus for transmitting signals Method and apparatus for transmitting signals

1984-07-05

1989-11-07

Jennings, Derek S.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

307116, 307140, H02J 100

Patent

active

048794767

ABSTRACT:
In a method and apparatus for transmitting signals from a control device to a diagnostic device in a motor vehicle, a transmission of signals in a serial form is obtained by means of an electric current. In order to detect whether the diagnostic device is connected to the control device a voltage is measured in a diagnostic signal-conducting lead connected to the diagnostic device. This voltage is varied by means of a resistor mounted at the input of the diagnostic device when the diagnostic device is connected to the control device.

REFERENCES:
patent: 4453088 (1984-06-01), Moore
patent: 4454560 (1984-06-01), Nakao et al.
patent: 4514645 (1985-04-01), Endo et al.

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