Shift solenoid functional test strategy for an automatic transmi

Boots – shoes – and leggings

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Details

36442401, 477155, 477115, 477138, 477906, 192 331, 192109F, 74335, 74336R, F16H 6112, F16H 5968

Patent

active

055218180

ABSTRACT:
A diagnostic strategy for an automatic transmission having electronic shift control solenoids for controlling application and release of clutches and brakes during the establishment and disestablishment of torque ratios in multiple-ratio gearing for the transmission wherein provision is made for developing diagnostic data that detects failure modes due to a faulty shift solenoid by using predetermined failure modes stored in the RAM portion of a microprocessor and comparing those known failure modes to the actual performance of the shift solenoids.

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