Subaru Legacy III (2000-2003 year). Manual - part 571

AT-18

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL

B: SCHEMATIC

AT-00772

( 1 )

( 2 )

( 3 )

( 4 )

( 5 )

( 7 )

( 6 )

( 8 )

( 9 )

(12)

(37)

(36)

(35)

(34)

(33)

(32)

(31)

(30)

(29)

(28)

(27)

(26)

(25)

(24)

(17)

(14)

(13)

(16)

(15)

(18)

(21)

(20)

(19)

(10)

(11)

(38)

(39)

(46)

(40)

(41)

(42)

(43)

(44)

(45)

(47)

(48)

(49)

(52)

(53)

(54)

(55)

(56)

(57)

(58)

(59)

(60)

(61)

(50)

(23)

(22)

(51)

AT-19

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL

(1) Transmission control module

(19) SPORT shift mode switch

(41) Torque control cut signal

(2) Ignition switch

(20) Up switch (with SPORT shift)

(42) Torque control signal 2

(3) Brake switch

(21) Down switch (with SPORT shift)

(43) Torque control signal 1

(4) Brake light

(22) Steering shift switch RH (with 

SPORT shift)

(44) Intake manifold pressure signal

(5) Ignition relay

(45) AT diagnosis signal

(6) Buzzer (with SPORT shift)

(23) Steering shift switch LH (with 

SPORT shift)

(46) Engine control module

(7) SPORT shift indicator (with 

SPORT shift)

(47) Front vehicle speed sensor

(24) "P" range indicator light

(48) Rear vehicle speed sensor

(8) Speedometer

(25) "R" range indicator light

(49) Torque converter turbine speed 

sensor

(9) Cruise control module

(26) "N" range indicator light

(10) ABS control module (without VDC 

system)

(27) "D" range indicator light

(50) POWER switch

(28) "3" range indicator light

(51) HOLD switch

(11) VDC control module (with VDC 

system)

(29) "2" range indicator light

(52) ATF temperature sensor

(30) "1" range indicator light

(53) Shift solenoid 1

(12) Steering angle sensor (with VDC 

system)

(31) "P" range switch

(54) Shift solenoid 2

(32) "R" range switch

(55) 2-4 brake timing solenoid

(13) FWD indicator light (without VDC 

system and SPORT shift)

(33) "N" range switch

(56) 2-4 brake duty solenoid

(34) "D" range switch

(57) Line pressure duty solenoid

(14) "AT OIL TEMP" warning light

(35) "3" range switch

(58) Lock-up duty solenoid

(15) POWER indicator light

(36) "2" range switch

(59) Low clutch timing solenoid

(16) HOLD indicator light

(37) "1" range switch

(60) Transfer duty solenoid

(17) FWD switch (without VDC system 

and SPORT shift)

(38) Data link connector

(61) SPORT shift solenoid (with 

SPORT shift)

(39) Throttle position sensor

(18) SPORT shift (with SPORT shift)

(40) Engine speed signal

AT-20

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL

C: MEASUREMENT

Only for models with VDC system, measure input/output signal voltage.

1. WAVEFORM

(A) Can communication line

(B) Terminal No.: 

(B56) No. 9 — (B55) No. 9

(C) Terminal No.: 

(B56) No. 18 — (B55) No. 9

AT-00644

(V)

4

0

4

0

2.5 V

(A)

(B)

(C)

1.5 V

5 ms

3.5 V

2.5 V

AT-21

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

SUBARU SELECT MONITOR

6. Subaru Select Monitor

A: OPERATION

1. READ DIAGNOSTIC TROUBLE CODE

1) Prepare Subaru Select Monitor kit.
<Ref. to AT-8, PREPARATION TOOL, General De-
scription.>

2) Connect diagnosis cable to Subaru Select Mon-
itor.
3) Insert cartridge into Subaru Select Monitor.

4) Connect Subaru Select Monitor to data link con-
nector.

(1) Data link connector located in the lower por-
tion of the instrument panel (on the driver's
side).

(2) Connect diagnosis cable to data link con-
nector.

NOTE:
Do not connect scan tools except for Subaru Select
Monitor and OBD-II general scan tool.
5) Turn ignition switch to ON (engine OFF) and
Subaru Select Monitor switch to ON.

6) On the «Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
7) On the «System Selection Menu» display
screen, select the {Transmission Control System}
and press the [YES] key.
8) Press the [YES] key after displayed the informa-
tion of transmission type.
9) On the «Transmission Diagnosis» display
screen, select the {Diagnostic Code(s) Display}
and press the [YES] key.
10) On the «Diagnostic Code(s) Display» display
screen, select the {Latest Diagnostic Code(s)} or
{Memorized Diagnostic Code(s)} and press the
[YES] key.

NOTE:
• For detailed operation procedure, refer to the
SUBARU SELECT MONITOR OPERATION MAN-
UAL.
• For detailed concerning diagnostic trouble
codes, refer to the DIAGNOSTIC TROUBLE CODE
LIST. <Ref. to AT-29, List of Diagnostic Trouble
Code (DTC).>

2. READ CURRENT DATA

1) On the «Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display
screen, select the {Transmission Control System}
and press the [YES] key.
3) Press the [YES] key after displayed the informa-
tion of transmission type.
4) On the «Transmission Diagnosis» display
screen, select the {Current Data Display & Save}
and press the [YES] key.
5) On the «Data Display Menu» display screen, se-
lect the {Data Display} and press the [YES] key.

(A) Data link connector

AT-00338

AT-00339

AT-00645

( A )

(A) Power switch

AT-00341

( A )