Subaru 2006 Legacy, Manual

Page: 3400 / 4302

5AT-32
Line Pressure Test
AUTOMATIC TRANSMISSION
7. Line Pressure Test
A: MEASUREMENT
NOTE:
If the clutch or brake shows a sign of slippage, or
shifting interval is not correct, check the line pres-
sure.
• Excessive shock 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 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 OIL PRESSURE ADAPTER
4) Set the ST1 and ST2.
ST1 498897200 OIL PRESSURE ADAPTER
ST2 498575400 OIL PRESSURE GAUGE
ASSY
5) Lower the vehicle, and pull ST1 and ST2 into the
vehicle.
ST1 498897200 OIL PRESSURE ADAPTER
ST2 498575400 OIL PRESSURE GAUGE
ASSY
6) Connect the Subaru Select Monitor to the data
link connector and read the current data. <Ref. to
5AT(diag)-16, READ CURRENT DATA, OPERA-
TION, Subaru Select Monitor.>
(1) Start the engine.
(2) Turn the Subaru Select Monitor power 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 is displayed.
(6) On the «Transmission Diagnosis» display
screen, select the {Current Data Display &
Save} and 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 target oil pressure».
7) Perform the line pressure test.
NOTE:
• Do not perform the line pressure test for more
than 5 seconds at a time. Doing so will make the
engine oil and ATF deteriorate and the clutch and
brake to be adversely affected.
• After performing the line pressure test, 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 at 1,200 rpm or less.
• Adjust the throttle valve angle in order to match
the “P/L solenoid target pressure” displayed on the
Subaru Select Monitor.
AT-01752
Range of the
selector lever
Throttle valve
angle
ATF temperature
condition
“P/L Solenoid Target Pressure”
displayed on the Subaru Select
Monitor
kPa
Standard line pressure
kPa (kg/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)
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