Subaru Legacy 2004 Service Manual page 2380

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, the line pressure
should be checked.
• Excessive shocks during up-shift or shifting
takes place at a higher point than under normal cir-
cumstances, 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 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 the ST1 and ST2 into
vehicle.
ST1 498897200 OIL PRESSURE ADAPTER
ST2 498575400 OIL PRESSURE GAUGE
ASSY
6) Connect the Subaru Select Monitor to 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 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.
Line Pressure Test
(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 target oil pressure".
AT-01752
5AT-34