Page 2465 of 2870
4AT(H4SO)-6
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
General Description
5. OPERATION OF SHIFT SELECT LEVER
Make sure there is no abnormal noise, dragging or
contact pattern in each select lever range.
WARNING:
Stop the engine while checking operation of se-
lect lever.
6. POWER SWITCH
Make sure that the POWER indicator light in com-
bination meter comes ON, when turning the POW-
ER switch to ON.
7. HOLD SWITCH
Make sure that the HOLD indicator light in combi-
nation meter comes ON, when turning the HOLD
switch to ON.
AT-00413
P
R
N
D
3
2
1
AT-00319
AT-00320
Page 2466 of 2870
4AT(H4SO)-7
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
General Description
C: PREPARATION TOOL
1. SPECIAL TOOL
2. GENERAL TOOL
ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
24082AA230
(Newly adopted tool)CARTRIDGE Troubleshooting for electrical systems.
22771AA030 SUBARU SELECT
MONITOR KITTroubleshooting for electrical systems.
English: 22771AA030 (Without printer)
German: 22771AA070 (Without printer)
French: 22771AA080 (Without printer)
Spanish: 22771AA090 (Without printer)
TOOL NAME REMARKS
Circuit tester Used for measuring resistance, voltage and ampere.
Oscilloscope Used for measuring sensor.
ST24082AA230
ST22771AA030
Page 2467 of 2870
4AT(H4SO)-8
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Electrical Components Location
4. Electrical Components Location
A: LOCATION
1. CONTROL MODULE
LHD MODEL
RHD MODEL
(1) Engine control module (ECM) (3) Transmission control module
(TCM)(4) Data link connector
(2) AT warning light (POWER indica-
tor light)
AT-00414
(1) (2)
(3) (4)
AT-00369 (2)
(4)
(1)
(3)
Page 2468 of 2870
4AT(H4SO)-9
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Electrical Components Location
LHD RHD
AT-00323
(1)
AT-00324
(2)
(3)
AT-00416
(3)
AT-00372
(4)
AT-00417
Page 2469 of 2870
4AT(H4SO)-10
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Electrical Components Location
2. SENSOR
(1) Throttle position sensor (4) Rear vehicle speed sensor (6) ATF temperature sensor
(2) Front vehicle speed sensor (5) Torque converter turbine speed
sensor
(3) Inhibitor switch
AT-00744
(1)
(2)(3)
(4) (5)(6)
AT-00328 (1)
(2)
(4)
AT-00329
(3)
AT-00330
(5)
AT-00331
Page 2470 of 2870
4AT(H4SO)-11
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Electrical Components Location
3. SOLENOID
(1) Shift solenoid 1 (4) Low clutch timing solenoid (7) 2-4 brake timing solenoid
(2) Shift solenoid 2 (5) Lock-up duty solenoid (8) Transfer duty solenoid
(3) Line pressure duty solenoid (6) 2-4 brake duty solenoid
(6)
AT-00332
AT-00333 (1) (2) (3) (4) (5)(6)(7)
(8)
AT-00334
(1)
(6)
(7) (2)(3)(4)(5)
AT-00335(8)
Page 2471 of 2870

4AT(H4SO)-12
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Transmission Control Module (TCM) I/O Signal
5. Transmission Control Module (TCM) I/O Signal
A: ELECTRICAL SPECIFICATION
Check with ignition switch ON.
ContentConnector
No.Terminal No. Measuring conditions Voltage (V)Resistance
to chassis
ground (Ω)
Back-up power supply B56 1 Ignition switch OFF 10 — 13 —
Ignition power supplyB54 23
Ignition switch ON (with
engine OFF)10 — 13 —
B54 24
Inhibitor
switch“P” range
switchB55 1Select lever in “P” range Less than 1
—
Select lever in any other than
“P” range (except “N” range)More than 8
“N” range
switchB55 14Select lever in “N” range Less than 1
—
Select lever in any other than
“N” range (except “P” range)More than 8
“R” range
switchB55 3Select lever in “R” range Less than 1
—
Select lever in any other
than “R” rangeMore than 8
“D” range
switchB55 4Select lever in “D” range Less than 1
—
Select lever in any other
than “D” rangeMore than 8
“3” range
switchB55 5Select lever in “3” range Less than 1
—
Select lever in any other
than “3” rangeMore than 8
AT-00568
toB54
1 2
7 8 9563 4
10 11 12
19 20 21 13 14 15 16 17 18
22
23
24
toB55
1 2 3 4
10 11 12
19 20 21 13
5 6
14 15
7 8 9
16 17 18
22 23 24
toB56
1 2
7 8 95 63 4
10 11 12
19 20 21 13 14 15
16 17 18
22
23
24
Page 2472 of 2870

4AT(H4SO)-13
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Transmission Control Module (TCM) I/O Signal
Inhibitor
switch“2” range
switchB55 6Select lever in “2” range Less than 1
—
Select lever in any other
than “2” rangeMore than 8
“1” range
switchB55 7Select lever in “1” range Less than 1
—
Select lever in any other
than “1” rangeMore than 8
Brake switch B55 12Brake pedal depressed More than 10.5
—
Brake pedal released Less than 1
Kick-down switch B55 11Throttle fully opened Less than 1
—
Throttle fully closed More than 6.5
AT OIL TEMP warning light B56 10Light ON Less than 1
—
Light OFF More than 9
Throttle position sensor B54 3Throttle fully closed 0.2 — 1.0
—
Throttle fully open 4.2 — 4.7
Throttle position sensor
power supplyB54 2Ignition switch ON (with
engine OFF)4.8 — 5.3 —
ATF temperature sensor B54 11ATF temperature 20°C
(68°F)1.6 — 2.0 2.1 k — 2.9 k
ATF temperature 80°C
(176°F)0.4 — 0.9 275 — 375
Rear vehicle speed sensor B55 24Vehicle stopped 0
450 — 650
Vehicle speed at least 20
km/h (12 MPH)More than 1 (AC range)
Front vehicle speed sensor B55 18Vehicle stopped 0
450 — 650
Vehicle speed at least 20
km/h (12 MPH)More than 1 (AC range)
Torque converter turbine
speed sensorB55 8Engine idling after warm-
up (D range)0
450 — 650
Engine idling after warm-
up (N range)More than 1 (AC range)
Vehicle speed output signal B56 17Vehicle speed at most 10
km/h (6 MPH)Less than 1 ←
→ More than 4—
Engine speed signal B55 17Ignition switch ON (with
engine OFF)More than 10.5
—
Ignition switch ON (with
engine ON)8 — 11
Cruise set signal B55 22When cruise control is set
(SET lamp ON)Less than 1
—
When cruise control is not
set (SET lamp OFF)More than 6.5
Torque control signal 1 B56 5Ignition switch ON (with
engine ON)More than 4 —
Torque control signal 2 B56 14Ignition switch ON (with
engine ON)More than 4 —
Torque control cut signal B55 10Ignition switch ON
(After engine is warmed-up)8—
Intake manifold pressure
signalB54 1 Engine idling after warm-up 0.4 — 1.6 —
Shift solenoid 1 B54 221st or 4th gear More than 9
10 — 16
2nd or 3rd gear Less than 1
Shift solenoid 2 B54 51st or 2nd gear More than 9
10 — 16
3rd or 4th gear Less than 1 Check with ignition switch ON.
ContentConnector
No.Terminal No. Measuring conditions Voltage (V)Resistance
to chassis
ground (Ω)