Circuit/System Description

The shift solenoid Valve 1 is part of the control solenoid valve assembly which has no serviceable components. Shift solenoid Valve 1 is a normally closed ON/OFF solenoid and is controlled by the transmission control module (TCM) through a low side driver. When the shift solenoid Valve 1 is energized (ON), fluid pressure is directed to the clutch select valve. Power to shift solenoid Valve 1 is supplied by the TCM through a high side driver. The high side driver protects the circuit and components from excessive current flow. If excessive current flow is detected, the high side driver will turn OFF. When the fault is corrected, the high side driver will reset.