Subaru LEGACY 2002 Quick Reference Index page 298

Automatic Transmission
3. Transmission Control Module (TCM)
The TCM receives various sensor signals and determines the running conditions of the vehicle. It
then sends control signals to each solenoid according to the preset gearshift characteristic data,
lock-up operation data, and transfer clutch torque data (duty ratios) / multi-plate clutch (LSD)
torque data (duty ratios).
A: CONTROL SYSTEM
1. MPT MODELS
Control item
Shift control
Lock-up control
TRANSMISSION CONTROL MODULE (TCM)
Ordinary shift control
ABS-in-operation control
Hydraulic oil temperature control
Reverse inhibiting control
Shift pattern (Base/Power) select control
Hold control
Grade control
Ordinary lock-up control
Smooth control
Hydraulic oil temperature control
Input signal
Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Engine speed
Inhibitor switch
Power switch
Kickdown switch
ABS signal
Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Brake switch
ATF temperature sensor
Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Inhibitor switch
Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Inhibitor switch
Power switch
Inhibitor switch
Hold switch
Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Brake switch
Inhibitor switch
Engine speed
Intake manifold pressure
Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Engine speed
Inhibitor switch
Hold switch
Power switch
Throttle position sensor
ATF temperature sensor
AT-22