Diagnostic system for automatic transmission

Details Diagnostic system for automatic transmission Diagnostic system for automatic transmission

2007-07-31

2011-10-04

Zanelli, Michael J. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle diagnosis or maintenance indication

C701S031000, C701S051000

Reexamination Certificate

active

08032274

ABSTRACT:
A diagnostic system for an automatic transmission is provided in which a microcomputer determines that torque that can drive the driving wheels of the vehicle is not transmitted to an output shaft of the automatic transmission when the vehicle is stopped and the ignition key is operated to the OFF position, and performs forced energization of solenoids of solenoid valves associated with respective friction devices of the transmission, while monitoring current passing through the solenoid valves. If the current monitored does not match the current for energizing any of the solenoids, the microcomputer determines that the corresponding solenoid valve is at fault. Thus, the diagnostic system appropriately determines the presence of a fault of each solenoid valve for controlling the hydraulic pressure to each friction device, with increased flexibility and freedom.

REFERENCES:
patent: 4414863 (1983-11-01), Heino
patent: 2004/0226785 (2004-11-01), Sugimura
patent: 0 448 219 (1991-09-01), None
patent: 1 022 494 (2000-07-01), None
patent: A-04-203670 (1992-07-01), None
patent: A-11-280883 (1999-10-01), None
patent: A-2001-116134 (2001-04-01), None
patent: A-2003-294122 (2003-10-01), None
patent: A-2004-108540 (2004-04-01), None
patent: A-2004-340273 (2004-12-01), None
patent: A-2006-077892 (2006-03-01), None
patent: A-2006-170295 (2006-06-01), None
patent: WO 96/12127 (1996-04-01), None

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