Subaru 2002 Impreza Service Manual page 253

TRANSMISSION CONTROL MODULE (TCM)
Automatic Transmission
(1 ) Transfer control valve
(2) Transfer clutch pressure
(3) Transfer duty solenoid
(4)
Transfer pressure
(5) Filter
(6) Pilot pressure
NF0091
(7) Line pressure
(8) Oil pump
(9) Control valve
AT-31