Grand AM L4-144 2.4L DOHC VIN T SFI (1997)
Shift Solenoid: Description and Operation
1-2 Shift Solenoid Valve
The PCM controls the ground for the 1-2 Shift Solenoid (1-2 SS) valve, thereby commanding the solenoid ON or OFF according to transmission and
vehicle operation. When the solenoid is OFF, filtered line pressure that is fed to the solenoid will cease. When energized (ON), the exhaust port is
blocked, stopping the exhaust of line pressure through the solenoid. Pressure on the end of the 1-2 shift solenoid valve moves the valve against a spring
force, sending line pressure into the 1-2 shift solenoid fluid passage to the 3-4 shift valve.
