Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 2000-2003 Approved Subaru Legacy 2000 2000 Service Manual MECHANISM AND FUNCTION SECTION Automatic Transmission and Differential MSA5TCD00L18199
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LEGACY (W2260BE_SGML Complete)
3-2 [M1200] MECHANISM AND FUNCTION
12. Transmission Control Module (TCM)
12. Transmission Control Module (TCM)
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 ratio).
A: CONTROL SYSTEM
Control item Input signal
Shift control Ordinary shift control Throttle position sensor
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
Engine speed
Inhibitor switch
ABS operation control ABS signal
Throttle position sensor
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
Brake switch
Hydraulic oil temperature control ATF temperature sensor
Reverse inhibit control Throttle position sensor
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
Inhibitor switch
Shift pattern select control Throttle position sensor
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
Inhibitor switch
Grade control Throttle position sensor
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
Brake switch
Inhibitor switch
Lock-up control Ordinary lock-up control Throttle position sensor
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
Engine speed
Inhibitor switch
Smooth control Throttle position sensor
Hydraulic oil temperature control ATF temperature sensor
Oil pressure control Ordinary pressure control Throttle position sensor
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
Engine speed
Inhibitor switch
ATF temperature sensor
Shifting control Throttle position sensor
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
Engine speed
Torque converter turbine speed sensor
Inhibitor switch
ATF temperature sensor
Starting control Engine speed
ATF temperature sensor
Inhibitor switch
64
LEGACY (W2260BE_SGML Complete)
MECHANISM AND FUNCTION [M12A0] 3-2
12. Transmission Control Module (TCM)
Control item Input signal
Oil pressure control Learning control Shift solenoid A
Shift solenoid B
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
Throttle position sensor
Torque converter turbine speed sensor
ATF temperature sensor
AWD transfer clutch control Ordinary transfer control Throttle position sensor
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
Torque converter turbine speed sensor
Inhibitor switch
ATF temperature sensor
FWD switch
1st range control Throttle position sensor
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
Torque converter turbine speed sensor
Inhibitor switch
Slip detection control Throttle position sensor
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
Steering control Throttle position sensor
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
ABS operation control ABS signal
Throttle position sensor
Vehicle speed sensor 1 (rear)
Vehicle speed sensor 2 (front)
Brake switch
65
LEGACY (W2260BE_SGML Complete)
3-2 [M12B0] MECHANISM AND FUNCTION
12. Transmission Control Module (TCM)
B: SYSTEM DIAGRAM
B3H1673A
66
LEGACY (W2260BE_SGML Complete)
MECHANISM AND FUNCTION [M12C0] 3-2
12. Transmission Control Module (TCM)
C: SHIFT CONTROL
Gearshifting is controlled in response to driving conditions, according to the shift point character-
istic data stored in the TCM. Solenoids are operated at the proper time corresponding to the shift
pattern, throttle position, and vehicle speed for smooth shifting.
NOTE:
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