Subaru Legacy IV (2008 year). Manual - part 696

 

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Subaru Legacy IV (2008 year). Manual - part 696

 

 

4AT(diag)-5

General Description

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

3. General Description

A: CAUTION

1. 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 to check these circuits.
• Be careful not to damage the airbag system
wiring harness when performing diagnostics or
servicing the TCM.

2. 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
the 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 4AT-26, 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-28, INSPECTION, Dif-
ferential Gear Oil.>

AT-01464

(A) Oil level gauge

(B) Inspection position when “HOT”

(C) Upper level

(D) Lower level

(E) Inspection position when “COLD”

(A) Oil level gauge

(B) Upper level

(C) Lower level

AT-04841

COLD

LF

HO

T

LF

(A)

(C)

(D)

(C)

(D)

(E)

(B)

AT-04863

(B)

(C)

(A)

(A)

4AT(diag)-6

General Description

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

5. OPERATION OF 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.

AT-02048

4AT(diag)-7

General Description

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

C: PREPARATION TOOL

1. SPECIAL TOOL

2. GENERAL TOOL

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

1B022XU0

SUBARU SELECT 
MONITOR III KIT

Used for troubleshooting the electrical system.

TOOL NAME

REMARKS

Circuit tester

Used for measuring resistance, voltage and current.

Oscilloscope

Used for measuring the sensor.

ST1B022XU0

4AT(diag)-8

Electrical Component Location

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

4. Electrical Component Location

A: LOCATION

1. CONTROL MODULE

(1)

Engine control module (ECM)

(3)

Transmission control module 
(TCM)

(4)

Data link connector

(2)

ATF temperature warning light (AT 
warning light)

(5)

Body integrated unit

(3)

(5)

(2)

(1)

AT-01873

(4)

 

 

 

 

 

 

 

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