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Diagnosis system for a motor vehicle

  • US 4,975,848 A
  • Filed: 01/05/1990
  • Issued: 12/04/1990
  • Est. Priority Date: 09/22/1987
  • Status: Expired due to Term
First Claim
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1. A diagnosis system for a motor vehicle controlled by an electronic control system having storing means for storing an identification code signal for designating the type of said electronic control system, the diagnosis system comprising:

  • a computer having a central processing unit and memorizing means storing a plurality of diagnosis programs for diagnosing various types of electronic control systems;

    connecting means connecting said computer to said electronic control system;

    type discriminating means for reading said identification code signal stored in said storing means of the electronic control system;

    program select means responsive to the read out identification code signal for selecting a diagnosis program from said diagnosis programs;

    data demand means for applying a data demand signal to said electronic control system in accordance with the selected program;

    data receiving means for receiving data from said electronic control system; and

    display means for displaying received data in a form of diagnosis data.

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