Subaru Legacy (2005 year). Manual - part 603

5AT(diag)-3

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Basic Diagnostic Procedure

6

PERFORM DIAGNOSIS.
1) Inspect using the “Diagnostic Procedure 
with Diagnostic Trouble Code (DTC)”. <Ref. to 
5AT(diag)-35, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

NOTE:

For DTC table, refer to “List of Diagnostic Trou-
ble Code (DTC)”. <Ref. to 5AT(diag)-31, List of
Diagnostic Trouble Code (DTC).>

2) Repair the trouble cause.
3) Perform the clear memory mode.
4) Perform the inspection mode. <Ref. to 
5AT(diag)-21, Inspection Mode.>
5) Display DTC.

Is DTC displayed on the Sub-
aru Select Monitor?

Inspect using the 
“Diagnostic Proce-
dure with Diagnos-
tic Trouble Code 
(DTC)”. <Ref. to 
5AT(diag)-35, 
Diagnostic Proce-
dure with Diagnos-
tic Trouble Code 
(DTC).>

Inspect using 
“General Diagnos-
tic Table”. <Ref. to 
5AT(diag)-137, 
General Diagnos-
tic Table.>

Step

Check

Yes

No

5AT(diag)-4

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Check List for Interview

2. Check List for Interview

A: CHECK

Check the following items when problem has occurred.

NOTE:
Use copies of this page for interviewing customers.

Customer’s name

Date of sale

Date of repair

Trans. model

TRANSMISSION

V.I.N.

Odometer reading

km (miles)

Symptom

❏ No up-shift
❏ No down-shift
❏ No kick down
❏ Vehicle does not move (❏ Any position  ❏ Particular position)
❏ Lock-up malfunction
❏ Noise or vibration
❏ Shift shock or slip
❏ Select lever does not move
❏ Others
(

)

Frequency

❏ Continuous  ❏ Intermittent (

 times a day)

Weather

❏ Fine  ❏ Cloudy  ❏ Rainy  ❏ Snowy

❏ Others
(

)

Place

❏ Highland  ❏ Suburbs  ❏ Inner city  ❏ Uphill  ❏ Rough road

❏ Others
(

)

Ambient air temperature

❏ Hot  ❏ Warm  ❏ Cool  ❏ Cold

Vehicle speed

km/h (MPH)

AT warning light (SPORT indicator 
light)

❏ Blinks continuously

❏ Not blink

Select lever position

❏ P  ❏ R  ❏ N  ❏ D  ❏ Manual mode

Driving condition

❏ Not affected

❏ At racing

❏ When decelerating

❏ At starting

❏ When accelerating

❏ While turning (❏ RH/❏ 
LH)

❏ While idling

❏ While cruising

Manual mode

❏ ON ❏ OFF

5AT(diag)-5

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

General Description

3. General Description

A: CAUTION

• Supplemental Restraint System “Airbag”
The airbag system wiring harness is routed near
the TCM.

CAUTION:
• All the airbag system wiring harnesses and
connectors are colored yellow. Do not use an
electric test equipment on these circuits.
• Be careful not to damage the airbag system
wiring harness when performing diagnostics or
servicing the TCM.
• Measurement
When measuring the voltage and resistance of the
ECM, TCM or each sensor, use a tapered pin with
a diameter of less than 0.64 mm (0.025 in) in order
to avoid poor contact. Do not insert a pin of more
than 0.65 mm (0.026 in) diameter.

B: INSPECTION

1. BATTERY

Measure the battery voltage and specific gravity of
electrolyte.

Standard voltage: 12 V or more

Specific gravity: 1.260 or more

2. TRANSMISSION GROUND

Make sure that the ground terminal bolt is tightened
securely.
• Chassis side

Tightening torque:

13 N

⋅

m (1.3 kgf-m, 9.4 ft-lb)

3. ATF LEVEL

Make sure that ATF level is the specified amount.
<Ref. to 5AT-28, INSPECTION, Automatic Trans-
mission Fluid.>

4. FRONT DIFFERENTIAL OIL LEVEL

Make sure the front differential oil level is the spec-
ified amount. <Ref. to 5AT-30, INSPECTION, Dif-
ferential Gear Oil.>

AT-01464

(A) Level gauge

(B) Check position when “HOT”

(C) Upper level

(D) Lower level

(E) Check position when “COLD”

(A) Upper level

(B) Lower level

AT-01450

COLD

LF

HOT

LF

(C)

(D)

(C)

(D)

(E)

(B)

(A)

AT-00317

(A)

(B)

L

F

5AT(diag)-6

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

General Description

5. OPERATION OF SHIFT SELECT LEVER

Make sure there is no noise, dragging or contact
pattern in each select lever range.

WARNING:
Stop the engine while checking operation of the
select lever.

• LHD model

• RHD model

C: PREPARATION TOOL

1. SPECIAL TOOL 

2. GENERAL TOOL

AT-02048

AT-01465

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

18482AA000

(Newly adopted tool)

CARTRIDGE

Troubleshooting for electrical system.

22771AA030

SUBARU SELECT 
MONITOR KIT

Troubleshooting for electrical system.
• 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 current.

Oscilloscope

Used for measuring sensor.

ST18482AA000

ST22771AA030