Subaru Impreza 2003 Service Manual page 1690

TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
(1) Transmission control module
(2) Ignition switch
(3) Brake switch
(4) Brake light
(5) Battery
(6) Buzzer
(7) SPORT shift indicator
(8) Speedometer
(9) Cruise control module
(10) ABS control module
(11) "AT OIL TEMP" warning light
(12) POWER indicator light
(13) HOLD indicator light
(14) SPORT shift
(15) SPORT shift mode switch
(16) Up switch
(17) Down switch
(18) "P" range indicator light
(19) "R" range indicator light
(20) "N" range indicator light
(21) "D" range indicator light
(22) "3" range indicator light
(23) "2" range indicator light
(24) "1" range indicator light
(25) "P" range switch
(26) "R" range switch
(27) "N" range switch
(28) "D" range switch
(29) "3" range switch
(30) "2" range switch
(31) "1" range switch
(32) Data link connector
(33) Throttle position sensor
(34) Engine speed signal
(35) Torque control cut signal
(36) Torque control signal 2
(37) Torque control signal 1
(38) Intake manifold pressure signal
4AT-20
(39) AT diagnosis signal
(40) Engine control module
(41) Front vehicle speed sensor
(42) Rear vehicle speed sensor
(43) Torque converter turbine speed
sensor
(44) POWER switch
(45) HOLD switch
(46) ATF temperature sensor
(47) Shift solenoid 1
(48) Shift solenoid 2
(49) 2-4 brake timing solenoid
(50) 2-4 brake duty solenoid
(51) Line pressure duty solenoid
(52) Lock-up duty solenoid
(53) Low clutch timing solenoid
(54) Transfer duty solenoid
(55) SPORT shift solenoid