Gm Global Technolgoy Operations, Inc.

Devon Robert Hall

Ian L Hanna

Bradley Howard

A shift system includes a shifter including a first switch, a second switch, and an interlock switch and being operable between a plurality of gear states. A controller is communicatively coupled with the shifter to receive signals that correspond to each of the first switch, the second switch, and the interlock switch. The controller includes a diagnostic counter that includes a passing criteria and a predetermined diagnostic threshold and is configured to adjust the diagnostic counter based on at least one of the signals received from the shifter being inconsistent with the others of the signals received.

Shift system for a vehicle

A method and controller for controlling an electronically controlled transmission in a vehicle propulsion system of a vehicle. The method includes disengaging a clutch in the transmission to prevent a power flow through the transmission in response to an upshift paddle selector and a downshift paddle selector both being actuated together for a first predetermined time period, and changing a ratio of the transmission in response to an actuation of one of the upshift paddle selector and the downshift paddle selector while the clutch in the transmission is disengaged to prevent a power flow through the transmission.

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Ann Arbor, MI, United States of America

Devon Robert Hall