Transmission Control Unit - Subaru SVX 1992 Manual

AUTOMATIC TRANSMISSION AND DIFFERENTIAL (tv122A11 3- 2
22. Transmission Control Unit
(TCU)
~
A: GENERAL
TCU receives various sensor signals and determines the
running conditions of the vehicle. It then sends control
signals to each solenoid according to the preset gear-
shift characteristic data, lock-up operation data, and
transfer clutch torque data (duty ratio) .
1 . CONTROL SYSTEM
Input signal Throttle
Vehicle Vehicle Engine ATF
Cruise
Atmo-
sensor speed speed revolu- temper- Inhibitor Manual
FWD
control
ABS
spheric
idle sensor sensor tions ature
switch switch switch
signal
signal pressure
Control item
switch 1 2 (rpm) sensor
signal
1 . Shift control
0 0 O 0 0
(1) Ordinary shift control
(2) ABS operation con- 0
trol
(3) Cruise control opera-
0 tion
(4) Hydraulic oil temper-
0 ature control
(5) Manual control 0 0
2 . Lock-up control
(1) Ordinary lock-up con-
0 0 O 0 0 0
trol
(2) Smooth control
0 0 0
(3) Low oil temperature 0
control
3 . Overrunning clutch
control 0 0 0 0 0 0
(1) Engine brake control
(2) 3-2 timing control
0 0 0
4. Line-pressure control
(1) Ordinary line pressure 0 0 0 0 0 0 0
control
(2) Shifting control 0 0 0 0 0 0
(3) Starting control
0 0
5 . Shift pattern select
control
O 0 0 0 0
(1) Power drive pattern
control
(2) Return to normal
0 0 0
O
drive pattern
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