Method of shifting in a manual mode of an electronically-controlled automatic transmission system

A method of shifting in a manual mode of an electronically-controlled automatic transmission system, said method comprising the steps of:

• determining whether a shift lever of a shift lever mechanism is presenting a position error when the shift lever is moved to a manual position, producing a first signal;
• determining whether at least one switch on the shift lever mechanism is presenting an error if a shift lever position error is not determined, producing a second signal, wherein said at least one switch indicates an upshift or a downshift of the automatic transmission;
• determining whether a temperature of an automatic transmission or engine coolant temperature exceeds a predetermined threshold if the at least one switch is not presenting an error and for producing a third signal;
• determining whether manual position conditions for said automatic transmission have been met based on said first, second and third signals;
• determining whether an upshift said scheduled or downshift said scheduled of the automatic transmission is scheduled if the manual position conditions have been met;
• and
• manually executing either upshift or downshift of the automatic transmission based on the determined upshift or downshift being scheduled, otherwise executing an automatic shift of the transmission if the manual position conditions have not been met.