Subaru 2009 IMPREZA, Руководство по обслуживанию

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4AT-34
Line Pressure Test
AUTOMATIC TRANSMISSION
7. Line Pressure Test
A: MEASUREMENT
NOTE:
If the clutch or brake shows a signs of slipping or
shift feel is not correct, check the line pressure.
• 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 insufficient oil pressure for
the operation of clutch, brake or control valve.
1) Line pressure measurement (under no load):
(1) Before measuring line pressure, lift up the
vehicle.
(2) Maintain the ATF temperature at approx. 70
— 80°C (158 — 176°F) during measurement.
(ATF will reach the temperature above after
idling the engine for approx. 30 minutes with the
select lever in “N” or “P”.)
2) Line pressure measurement (under heavy load)
(1) Before measuring line pressure, place
wheel chocks at the front and rear of all wheels,
then apply both the foot and parking brakes
(same as for stall test conditions).
(2) Measure the line pressure when the select
lever is in “R” or 2nd of manual mode with en-
gine under stall conditions.
(3) Measure the line pressure within 5 seconds
after shifting the select lever to each position. (If
the line pressure needs to be measured again,
allow the engine to idle and cool it down for
more than 1 minute.)
(4) Maintain the ATF temperature at approx. 70
— 80°C (158 — 176°F) during measurement.
(ATF will reach the temperature above after
idling the engine for approx. 30 minutes with the
select lever in “N” or “P”.)
3) Remove the test plug and attach the ST instead.
ST
498897200 OIL PRESSURE GAUGE
ADAPTER
4) Connect the ST1 with ST2.
ST1
498897200 OIL PRESSURE GAUGE
ADAPTER
ST2 498575400 OIL PRESSURE GAUGE
ASSY
5) Check for duty ratio changes by adjusting the ac-
celeration pedal position using the Subaru Select
Monitor.
6) Remove the ST and install the test plug.
Tightening torque:
13 N·m (1.3 kgf-m, 9.6 ft-lb)
(A) Test plug
AT-04673
(A)
Standard line pressure
Range
position
Line pressure
duty ratio (%)
Throttle valve
opening
angle
Line pressure
kPa (kg/cm
2
, psi)
Manual
mode
(2nd)
25 — 35 Full open
1,000 — 1,300
(10.2 — 13.3,
145 — 188)
R 15 — 25 Full open
1,500 — 1,850
(15.3 — 18.9,
217 — 268)
D 35 — 43 Full closed
500 — 800
(5.1 — 8.2,
72 — 116)