Throttle Valve Output Signal

Engine control unit converts throttle valve input signals into simple "on" and "off" signals which it transmits to the automatic transmission control unit. When gear selector is in "D" or "2", automatic transmission control unit uses these signals to determine proper gear selection. When gear selector is in "D", transmission will select and shift transmission into 1st, 2nd or 3rd gear. When gear selector is in "2" position, control unit will select and shift between 1st or 2nd gear.