Swift L4-1298cc 1.3L SOHC MFI (1997)
The manual valve is directly connected with the selector lever by wire. It opens and closes the oil passage mechanically so as to form respective oil
pressure circuit for L, 2, D, N, R, or P range according to the selector lever movement.
Throttle Valve
As the throttle valve is linked with the accelerator pedal by wire, it produces the throttle pressure corresponding to the extent to which the accelerator
pedal is depressed which is, in other words, the engine output. When the accelerator pedal is depressed, the throttle cam pushes the shift plug which then
compresses two springs to move the throttle valve. Thus the line pressure passage is opened and the throttle pressure is produced. The throttle pressure is
also applied to the back of the throttle valve to push back the valve. The throttle pressure is determined by the tensile force of the springs (position of the
shift plug) and applied to the primary and secondary regulator valves to regulate the line pressure.
Primary Regulator Valve