Circuit Description
WARNING: This page is about a different variant/trim than selected.
Shift solenoid valve ST is switched ON-OFF by a signal from ECM so that let in or out timing of 2nd brake is adjusted by operating orifice control valve. Therefore, shift solenoid valve ST operates when letting in or out reverse clutch.
If it is broken, the shift shock becomes big.
Fail-safe function:
If the gear is in 3rd, the 4th up-shift is prohibited. (If the gear is in 4th, down-shift to 3rd gear is performed.)