| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device and a control method of an automatic transmission capable of reducing frequency of erroneous determination that detecting means disposed in the automatic transmission is failed through it is normal.SOLUTION: A control device of an automatic transmission includes transmission state detecting means for detecting a state of an automatic transmission, common power source control means for supplying electricity to a hydraulic control valve and the transmission state detecting means, failure determining means for determining that the transmission state detecting means is failed when an abnormality continuation period which is a period of continuation of a state that an output of the transmission state detecting means is abnormal, becomes a prescribed period or more, and reset means for temporarily stopping the supply of electricity to the hydraulic control valve and the transmission state detecting means when the output of the transmission state detecting means is abnormal and the automatic transmission is free from gear shift. Further gear shift suppression means is disposed to suppress gear shift control of the automatic transmission in the abnormality continuation period.SELECTED DRAWING: Figure 2 |
