Circuit/System Description

The shift solenoid (SS) 2 is part of the control solenoid (w/body and TCM) valve assembly. The assembly is attached to the lower control valve body and has no serviceable parts. The shift solenoid is a normally closed (NC), On/Off solenoid. When the TCM opens the solenoid ground circuit, (solenoid off) solenoid signal fluid exhausts and the clutch select valve 3 moves to the non-apply position. The TCM shifts the transmission by operating the solenoids in on/off combinations. Solenoid power is supplied by the TCM through a high side driver (HSD). The HSD protects the circuits and components that the TCM powers. Should the circuit overload the driver will shutdown. After the overload is removed the HSD reset.