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Malfunction judgment system of oil temperature sensor for automatic transmission

  • US 5,830,106 A
  • Filed: 06/10/1997
  • Issued: 11/03/1998
  • Est. Priority Date: 06/11/1996
  • Status: Expired due to Fees
First Claim
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1. A malfunction judgment system of an oil temperature sensor for detecting a hydraulic oil temperature filled in an automatic transmission of a vehicle which includes a torque converter connected with a power source and a shift gear mechanism connected with the torque converter, comprising;

  • malfunction judgment means for receiving an output of the oil temperature sensor to judge a malfunction of the oil temperature sensor where an increase rate of the oil temperature is smaller than a predetermined value in a predetermined period after the vehicle starts running,running condition detecting means for detecting a vehicle running condition,and;

    the malfunction judgment means being provided with a plurality of malfunction judgment conditions for judging the malfunction of the oil temperature sensor in accordance with the running condition of the vehicle.

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