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Abnormality determination device for a vehicle speed sensor

  • US 4,759,212 A
  • Filed: 12/01/1986
  • Issued: 07/26/1988
  • Est. Priority Date: 12/11/1985
  • Status: Expired due to Term
First Claim
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1. An abnormality determination device for a vehicle speed sensor, said abnormality determination device comprising:

  • (a) a first revolution speed sensor for detecting a revolution speed of an output shaft of an automatic transmission and for generating a speed signal;

    (b) abnormality determination means for inputting the speed signal of said first revolution speed sensor, for determining if said first revolution speed sensor is abnormal, and for generating an abnormality signal in response to the determined result;

    (c) storage means for storing the abnormality signal; and

    (d) halt means for preventing said storage means from storing the abnormality signal when the automatic transmission is set at a neutral position or at a parking position.

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