Subaru Legacy (2005 year). Service manual — part 584
5AT-35
AUTOMATIC TRANSMISSION
Line Pressure Test
7. Line Pressure Test
A: MEASUREMENT
NOTE:
If the clutch or brake shows a sign of slippage, or
shifting interval is not correct, the line pressure
should be checked.
• Excessive shocks during up-shift may be due to
the line pressure being too high.
• Slippage or inability to operate the vehicle may,
in most cases, be due to loss of oil pressure for the
operation of the clutch, brake or control valve.
1) Set the vehicle on a lift.
2) Remove the under cover.
3) Remove the test plug and install the ST.
ST
498897200
ADAPTER
4) Set the ST1 and ST2.
ST1
498897200
ADAPTER
ST2
498575400
OIL PRESSURE GAUGE
ASSY
5) Lower the vehicle, and pull the ST into vehicle.
ST
498575400
OIL PRESSURE GAUGE
ASSY
6) Connect the Subaru Select Monitor to data link
connector and read the current data. <Ref. to
5AT(diag)-17, READ CURRENT DATA, OPERA-
TION, Subaru Select Monitor.>
(1) Start the engine.
(2) Turn the Subaru Select Monitor power
switch to ON.
(3) On the “Main Menu” display screen, select
the {Each System Check} and press the [YES]
key.
(4) On the “System Selection Menu” display
screen, select the {Transmission} and press the
[YES] key.
(5) Press the [YES] key after the information of
transmission type has been displayed.
(6) On the “Transmission Diagnosis” display
screen, select the {Current Data Display/Save}
and then press the [YES] key.
(7) On the “Transmission Diagnosis” display
screen, select the {Data Display} and press the
[YES] key.
(8) Using the scroll key, display the “P/L Sole-
noid Pressure”.
7) Perform the line pressure test.
NOTE:
• Do not perform the line pressure test for more than 5 seconds at a time. It makes engine oil and ATF de-
teriorate and the clutch and brake to be adversely affected.
• Be sure to cool down the engine for at least one minute with the select lever set in “P” or “N” range and with
the idle speed lower than 1,200 rpm after performing line pressure test.
• Adjust the throttle valve angle in order to obtain the “P/L Solenoid Pressure” displayed on the Subaru Se-
lect Monitor.
AT-03074
ST
Range of the
selector lever
Throttle valve
angle
ATF temperature
condition
“P/L Solenoid Pressure” dis-
played on the Subaru Select
Monitor
kPa
Specified line pressure
kPa (kgf/cm
2
, psi)
D
Full closed
45 — 55
°C
(113 — 131
°F)
490
385 — 555
(3.93 — 5.66, 55.8 — 80.5)
Full open
1,370
1,235 — 1,475
(12.59 — 15.04, 179.1 — 213.9)
R
Full closed
1,370
1,530 — 1,925
(15.60 — 19.6, 221.9 — 279.2)
5AT-36
AUTOMATIC TRANSMISSION
Transfer Clutch Pressure Test
8. Transfer Clutch Pressure
Test
A: INSPECTION
1) Set the vehicle on a lift.
2) Remove the heat shield cover securing bolts to
slide the heat shield cover.
3) Remove the test plug and install the ST.
ST
498897200
ADAPTER
CAUTION:
Be careful not to cut your arm with the heat
shield cover when removing the test plug and
installing the ST.
4) Set the ST1 and ST2.
ST1
498897200
ADAPTER
ST2
498575400
OIL PRESSURE GAUGE
ASSY
5) Lower the vehicle, and pull the ST into vehicle.
ST
498575400
OIL PRESSURE GAUGE
ASSY
6) Connect the Subaru Select Monitor to data link
connector and read the current data. <Ref. to
5AT(diag)-17, READ CURRENT DATA, OPERA-
TION, Subaru Select Monitor.>
(1) Start the engine.
(2) Turn the Subaru Select Monitor power
switch to ON.
(3) On the “Main Menu” display screen, select
the {Each System Check} and press the [YES]
key.
(4) On the “System Selection Menu” display
screen, select the {Transmission} and press the
[YES] key.
(5) Press the [YES] key after the information of
transmission type has been displayed.
(6) On the “Transmission Diagnosis” display
screen, select the {Current Data Display&Save}
and then press the [YES] key.
(7) On the “Transmission Diagnosis” display
screen, select the {Data Display} and press the
[YES] key.
(8) Using the scroll key, display the “4WD Sole-
noid Pressure”.
AT-01754
AT-03075
ST
AT-03076
ST1
ST2
5AT-37
AUTOMATIC TRANSMISSION
Transfer Clutch Pressure Test
7) Perform the transfer clutch pressure test.
NOTE:
• Do not perform the transfer clutch pressure test for more than 5 seconds at a time. It makes engine oil and
ATF deteriorate and the clutch and brake to be adversely affected.
• Be sure to cool down the engine for at least one minute with the select lever set in “P” or “N” range and with
the idle speed lower than 1,200 rpm after performing transfer clutch pressure test.
• Adjust the throttle valve angle in order to obtain the “4WD Solenoid Pressure” displayed on the Subaru Se-
lect Monitor.
Range of the
selector lever
Throttle valve
angle
ATF temperature
condition
“4WD Solenoid Pressure” dis-
played on the Subaru Select
Monitor
kPa
Specified line pressure
kPa (kgf/cm
2
, psi)
D
Full open
45 — 55
°C
(113 — 131
°F)
900
800 — 915
(8.16 — 9.33, 116.0 — 132.7)
Partial throttle
500
400 — 535
(4.08 — 5.46, 58.0 — 77.6)
N
Full closed
0
0 — 50
(0 — 0.51, 0 — 7.3)
5AT-38
AUTOMATIC TRANSMISSION
Automatic Transmission Assembly
9. Automatic Transmission As-
sembly
A: REMOVAL
1) Set the vehicle on a lift.
2) Fully open the front hood and support with hood
stay.
3) Disconnect the ground cable from battery.
4) Remove the collector cover.
5) Remove the intercooler. (Turbo model)
<Ref. to IN(H4DOTC)-12, REMOVAL, Intercool-
er.>
6) Remove the air intake chamber. (Non-turbo
model) <Ref. to IN(H6DO)-7, REMOVAL, Air Intake
Chamber.>
7) Remove the air cleaner case. (Non-turbo model)
<Ref. to IN(H6DO)-5, REMOVAL, Air Cleaner
Case.>
8) Remove the air breather hose. <Ref. to 5AT-68,
REMOVAL, Air Breather Hose.>
9) Remove the starter. <Ref. to SC(H4SO 2.0)-6,
REMOVAL, Starter.>
10) Disconnect the following connectors.
• Turbo model
(1) Transmission harness connectors
(2) Front oxygen (A/F) sensor
• Non-turbo model
11) Remove the intercooler stay and engine hang-
er rear. (Turbo model)
12) Disconnect the engine harness connectors,
and then remove the engine hanger rear. (Non-tur-
bo model)
AT-01364
AT-01379
(1) Front oxygen (A/F) sensor
(2) Transmission harness connectors
(A) Engine harness connectors
(B) Engine hanger rear
AT-02025
(1)
(2)
AT-01365
(B)
(A)
(A)
AT-02023
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