Subaru LEGACY 2002 Quick Reference Index page 286

Automatic Transmission
C: OUTPUT SIGNALS
Signal name
Shift solenoid 1, 2
Line pressure duty solenoid
Lock-up duty solenoid
Transfer duty solenoid
AT OIL TEMP light
2-4 brake duty solenoid
2-4 brake timing solenoid
Low clutch timing solenoid
Torque control signal 1
Torque control signal 2
POWER indicator light
HOLD indicator light
ELECTROHYDRAULIC CONTROL SYSTEM
Each of these signals controls shift step by turning the corresponding solenoid ON/OFF.
Activating timing is controlled for each solenoid to reduce shift shock.
Regulates the line pressure according to driving conditions.
Regulates the hydraulic pressure of the lock-up clutch to operate it in three modes
(open, smooth and lock-up).
Regulates the hydraulic pressure of the transfer clutch to control the driving force to the
rear drive shaft.
Causes the light to illuminate when ATF becomes excessively hot (exceeds a set tem-
perature level).
Regulates 2-4 brake operating pressure to reduce shifting shocks.
Switches on or off the pressure acting on 2-4 brake timing valve B to control the release
timing of the 2-4 brake.
Switches on or off the pressure acting on the low clutch timing valve B to control the re-
lease timing of the low clutch.
Also switches on or off the pressure acting on the reverse inhibit valve to control the re-
verse inhibit function.
Reduces engine torque during range selection and gear change.
Reduces engine torque during range selection and gear change.
Indicates whether the shift pattern is "Base" or "Power". The indicator lights in the
POWER mode. This light is also used to display diagnostic trouble codes for the on-
board diagnosis function.
Indicates whether the shift pattern is "Base" or "Hold". The indicator lights in the HOLD
mode.
Function
AT-10