Foley & Lardner LLP
Fail determination device for vehicle automatic transmissions and control device for vehicle automatic transmissions
A failure judgment device of an automatic transmission includes: a first abnormality judging section configured to judge a power supply fault abnormality or a breaking abnormality of the solenoid, from a selected shift stage and a state of the transmission mechanism, after the detection of the electric abnormality; and a second abnormality judging section configured to judge the power supply abnormality or the breaking abnormality of the solenoid, from the monitor current value when the solenoid valve is switched to an OFF state, after the detection of the electric abnormality, when one of the first abnormality judging section and the second abnormality judging section judges the power supply fault abnormality or the breaking abnormality, the judgement result being outputted.
NISSAN MOTOR CO., LTD. JATCO LTD
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Heo Chang Hajime Naonori Masahiro Norihira Youji
Moo Tasaka Iizuka Hamano Amano Itou