|
1.
caution |
This test must be performed
with the CVT fluid temperature
within the range of 70 to 80°C.
|
Start the engine and warm it up until the CVT fluid
temperature reaches 70 to 80°C.
|
|
2.Stop the engine and block
the RH and LH rear wheels with the wheel chocks.
|
|
3.Install the following
special tools at the hydraulic pressure outlet ports shown
in the
figure.
- Oil pressure gauge <3.0 MPa>
(MD998330)
- Joint (MD998331)
- Joint (MB992127)
note |
DR: Torque
converter output pressure port PRI:
Primary pressure port PL: Line pressure
port FWD: Forward clutch pressure
port REV: Reverse brake pressure
port
|
4.Restart the engine. 5.Make sure
that no CVT fluid leakage is found at the special tool
fixing points. 6.Pull the parking brake lever and
fully depress the brake pedal. (Maintain this operation
until measurement is completed.) 7.
warning |
For safety, operators must not
stand in front of and
at the rear of the vehicle during this test.
|
Measure the hydraulic pressure at each measuring
point in the conditions specified in
the standard hydraulic pressure table, and check that the
measurements are within the standard
value. 8.If not within the standard value, take
necessary steps according to the hydraulic
pressure test diagnosis table. 9.Stop the
engine. 10.Replace the O-rings on the plugs for
each pressure port. 11.Remove the special tools
and fit the plugs in the hydraulic pressure
ports. 12.Install the plugs. Then, start the
engine and check that no CVT fluid leakage is found
around the plugs.
Standard hydraulic pressure
table
Measuring
conditions
|
Standard hydraulic pressure
(MPa)
|
Selector lever position
|
Engine
speed
|
Forward
clutch pressure [Pressure at
FWD]
|
Reverse
brake pressure [Pressure at
REV]
|
Primary
pressure [Pressure at PRI]
|
Line
pressure [Pressure at PL]
|
Torque
converter [Pressure at DR]
|
P
|
Idling
|
0
|
0
|
0.1
-
1.5
|
0.5
-
1.8
|
0.4
-
0.7
|
R
|
0
|
0.2
-
1.5
|
0.1
-
1.5
|
0.5
-
1.8
|
0.4
-
0.7
|
N
|
0
|
0
|
0.1
-
1.5
|
0.5
-
1.8
|
0.4
-
0.7
|
D
|
0.2
-
1.5
|
0
|
0.1
-
1.5
|
0.5
-
1.8
|
0.4
-
0.7
|
Ds
<Vehicles without paddle
shift>
|
0.2
-
1.5
|
0
|
0.1
-
1.5
|
0.5
-
1.8
|
0.4
-
0.7
|
L
|
0.2
-
1.5
|
0
|
0.1
-
1.5
|
0.5
-
1.8
|
0.4
-
0.7
|
Hydraulic pressure test diagnosis
table
Symptom
|
Faulty part
|
Hydraulic pressure is high at all
measuring points.
|
Incorrect measuring
method
|
Hydraulic pressure is low at all
measuring points.
|
Malfunction of oil pump Clogged
oil strainer Clogged oil
cooler Malfunction in valve body
assembly Improper installation of valve body
assembly
|
Only
forward clutch pressure is abnormal.
|
Malfunction in valve body
assembly Improper installation of valve body
assembly
|
Only
reverse brake pressure is abnormal.
|
Malfunction in valve body
assembly Improper installation of valve body
assembly
|
Only
primary pressure is abnormal
|
Malfunction in valve body
assembly Improper installation of valve body
assembly
|
Only
line pressure is abnormal.
|
Malfunction in valve body
assembly Improper installation of valve body
assembly
|
Only
torque converter output pressure is
abnormal
|
Malfunction in valve body
assembly Improper installation of valve body
assembly Malfunction of torque
converter
|
|