Subaru Legacy (2005 year). Manual — part 542

4AT(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, 9.6 ft-lb)

3. ATF LEVEL

Make sure that ATF level is the specified amount.
<Ref. to 4AT-31, INSPECTION, Automatic Trans-
mission Fluid.>

4. FRONT DIFFERENTIAL OIL LEVEL

Make sure the front differential oil level is the spec-
ified amount. <Ref. to 4AT-33, 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

PI-00105

COLD

LF

HOT

LF

(A)

(C)

(D)

(C)

(D)

(E)

(B)

AT-00317

(A)

(B)

L

F

4AT(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.

C: PREPARATION TOOL

1. SPECIAL TOOL

2. GENERAL TOOL

AT-02048

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

4AT(diag)-7

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Electrical Component Location

4. Electrical Component Location

A: LOCATION

1. CONTROL MODULE

• LHD model

(1)

Engine control module (ECM)

(3)

Transmission control module
(TCM)

(4)

Data link connector

(2)

SPORT indicator light (AT warning
light)

(5)

Body integrated module

(3)

(5)

(2)

(1)

AT-01873

(4)

(1)

AT-01874

AT-01470

(2)

AT-01875

(3)

AT-01877

(4)

4AT(diag)-8

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Electrical Component Location

• RHD model

(1)

Engine control module (ECM)

(3)

Transmission control module
(TCM)

(4)

Data link connector

(2)

SPORT indicator light (AT warning
light)

(5)

Body integrated module

AT-01876

(5)

(2)

(3)

(5)

(1)

AT-01467

(4)

(1)

AT-01468

AT-01470

(2)