Subaru Legacy (2005 year). 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)