Subaru XT 1988 Service Manual page 560

3-2 AUTOMATIC TRANSMISSION AND DIFFERENTIAL
3) A/T CONTROL UNIT
The AfT control unit is mounted to the side face. It's front
faces the wheel arch with the left side toward the rear seat.
It receives various sensor signals and determines the running
~
Line·
Gearshift Lock-up
control control
pressure
Item
control
Throttle sensor 0 0 0
Vehicle revolution
sensor
1
(output shaft revolution
0 0 0
sensor mounted to
transmission)
Vehicle revolution IOnsor 2 (Note 1) (Note 1) (Note 1)
(built into meter panel) 0 0 0
~
Ignition pulse 0
0
0
"
c.
-= Inhibitor switch 0 0
1 st hold switch
0
ATF temperature sensor 0 0 0
Idle switch 0 0 0
Set signal 0
Cruise
control
"4th" range
rele .. e signal
0
FWD switch
Shift solenoid 1 0
Shift solenoid 2
0
Duty solenoid A
0
(line pressure)
Duty solenoid B
0
(lock-up)
:;
S- Overrunning clutch
0
"
solenoid
0
Duty solenoid C
(transfer)
ATF temperature
warning light
Power indicator light
1st hold indicator light 0
2 range indicator light
0
conditions of the veh icle. 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).
Shift-
Engine Self-
pattern 4WD Fail-safe
selection
brake
control
function
diagnosis
control
control function
0 0 0 0 0
0 0 0 0 0
(Note 1) (Note 1)
0
I
0 0
0
0
0 0 0 0
(Noae 2)
0 0
(Note 2)
0
0 0 0
0
(Note 2)
0
0
0
0
(Note 3)
0
0 0
0 0
0 0
0
0
0 0 0
0
0
0
0
0 0
NOTES: (1) Provided as spare for car-speed sensor 1 (mounted to transmission)
(2) Used as the diagnosis starting condition. If self-diagnosis does not begin. there is trouble somewhere in
the system_
(3) Used to display trouble history_
(1) Shift Pattern Select Control
Shift pattern is selectable automatically between a normal
pattern suitable for ordinary economy running and a power
pattern suitable for climbing uphill or rapid acceleration.
In the power pattern, the shift down point and shift up point
are set higher than those of the normal pattern.
When the power pattern is selected, the POWER indicator light
in the meter lights up.
Selector
position
"0" range
46
Changeover from
normal to power
pattern
Performed automati-
cally corresponding
to accelerator pedal
depression.
Meter indication
• Normal pattern:
OFF
• Power pattern:
ON
I