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Method of checking vehicle mounted electronic units

  • US 6,654,702 B2
  • Filed: 07/25/2001
  • Issued: 11/25/2003
  • Est. Priority Date: 07/26/2000
  • Status: Expired due to Fees
First Claim
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1. A method of testing an electronic unit mounted in a vehicle, the method utilizing a test device and a controller unit included in the electronic unit, an order signal being supplied from the test device to the controller unit, and processed therein to give processed results, the processed results being returned from the controller unit to the test device as a response signal, said method comprising:

  • providing, in said test device, first data designating several ports and several terminals contained in said controller unit, as well as second data instructing an order content relative to each of said ports and terminals, and providing said first and second data in a frame of an order signal, thereby formulating an order signal containing order contents;

    periodically transmitting said order signal from said test device to said controller unit, frame by frame, at a given frequency;

    processing said order contents corresponding to each of said ports and terminals contained in said order signal, when said order signal is received by said controller unit, thereby obtaining processed results;

    providing, in said controller unit, said processed results for each of said ports and terminals in a frame of a response signal; and

    periodically returning said response signal from said controller unit to said test device, frame by frame, at said given frequency;

    wherein at least one of said first data and said second data have a data length of 4 bits such that one processing cycle of transmitting said order signal and returning said response signal accommodates several ports and several terminals, and overall processing time is decreased.

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