Turbo Models
The electro-hydraulic control system for the transmission and transfer consists of various sensors and switches, a transmission control module (TCM) and the hydraulic controlling units including solenoid valves. The system controls the automatic transmission operation, including gear shifting, lockup clutch operation, line pressure, pilot pressure, pattern selection (BASE and POWER), and gear-shift timing. It also controls the operation of the transfer clutch. The TCU determines vehicle operating conditions from various input signals and controls a total of seven solenoids (line pressure linear solenoid, lockup duty solenoid, 2-4 brake duty solenoid, low clutch duty solenoid, high clutch duty solenoid, low & reverse clutch duty solenoid, and transfer duty solenoid) by sending appropriate signals to them.