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Mitsubishi L200. Manual - part 303

AC002289

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-119

8. Measure the resistance between terminals 1 and

2 at each solenoid valve side.

Standard value: 2.7

− 3.4 Ω (A/T fluid temper-

ature 20

°C)

9. If not within the standard value, replace the

solenoid valve.

10.If within the standard value, check the harness

wire between A/T control solenoid valve assembly
connector and each solenoid valve connector. If a
problem is not found at the steps above, check
the solenoid valve O-rings and replace if
necessary.

A/T FLUID TEMPERATURE SENSOR
CHECK

M1231104200072

1. Drain the A/T fluid and remove the valve body

cover.

ACX01206AG

A/T fluid temperature sensor

2. Remove the A/T fluid temperature sensor.

AC103441

ATF

A/T fluid

3. Measure the resistance between A/T control

solenoid valve assembly connector terminals 1
and 2.

Standard value:

Fluid temperature
(

°C)

Resistance value (k

Ω)

16.7

− 20.5

7.3

− 8.9

3.4

− 4.2

1.9

− 2.2

1.0

− 1.2

100

0.57

− 0.69

NOTE: The A/T fluid temperature warning lamp
on the combination meter flashes when the tem-
perature reaches approximately 135

C or higher

and then stops flashing when the temperature
drops below approximately 115

4. If the A/T fluid temperature sensor resistance and

the temperature when the A/T fluid temperature
warning lamp is illuminating or switched off are
outside the standard value ranges, replace the A/
T fluid temperature sensor.

4LLc SWITCH CONTINUITY CHECK

M1231131800294

AC509434AE

Check the continuity between terminal of the white
connector indicated in the illustration.

Transfer lever position Specified condition
4L <Vehicles with easy
select 4WD> or 4LLc
<Vehicles with super
select 4WD>

Continuity (Less than 2
Ω)

Other than the above

Open circuit

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-120

TORQUE CONVERTER STALL CHECK

M1231103500177

The purpose of this test is to measure the maximum
engine speed when the torque converter stalls in D
or R ranges in order to check the torque converter
(Stator and one-way clutch operation) and the hold-
ing performance of the clutches and brakes which
are built into the transmission.

WARNING

For safety, the front and rear of the vehicle
should be kept clear of other people while
this test is being carried out.

1. Check the A/T fluid level, the A/T fluid

temperature and the engine coolant temperature.

• A/T fluid level: HOT position on oil level gauge

• A/T fluid temperature: 70 − 80°C

• Engine coolant temperature: 80 − 100°C

NOTE: The A/T fluid temperature is measured
with M.U.T.-III.

2. Place wheel locks on both the left and right front

wheels.

3. Pull the parking brake lever to apply the parking

brake and depress the brake pedal fully.

4. Start the engine.

CAUTION

• Do not keep the throttle fully open for any

longer than 5 seconds.

• If you repeat the stall test when the A/T fluid

temperature is greater than 80

°C, move the

selector lever to the "N" position and let the
engine run at approximately 1,000 r/min for at
least one minute. Wait until the A/T fluid tem-
perature returns to 80

°C or less.

5. Move the selector lever to the D position, fully

depress the accelerator pedal and quickly take a
reading of the maximum engine speed at this
time.

Standard stalling engine speed: 2, 200

− 2,

700 r/min

6. Move the selector lever to the R position and

repeat the test described above.

Standard stalling engine speed: 2, 200

− 2,

700 r/min

TORQUE CONVERTER STALL TEST
JUDGMENT RESULTS

1. Stall speed is too high in both D and R ranges

• Malfunction of the torque converter (Slippage

on the splines of the torque converter and the
input shaft)

• Low line pressure

• Low-reverse brake slippage and malfunction

of the one-way clutch

2. Stall speed is too high in D range only

• Underdrive clutch slippage

3. Stall speed is too high in R range only

• Reverse clutch slippage

4. Stall speed is too low in both D and R ranges

• Malfunction of the torque converter (Slippage

of the one-way clutch)

• Low line pressure

• Poor engine output

HYDRAULIC PRESSURE TESTS

M1231103800305

CAUTION

The A/T fluid temperature should be between 70
− 80°C during the test.
1. Check the A/T fluid level, temperature and engine

coolant temperature.

• A/T fluid level: HOT mark on the level gauge

• A/T fluid temperature: 70 − 80°C

• Engine coolant temperature: 80 − 100°C

2. Raise the vehicle so that the wheels are free to

turn.

AC101188AC

MD998900

MD998330

Oil pan

AC101189AC

MD998900

MD998330

Transmission control
cable

AC101190AE

MD998332

MD998900

A/T fluid cooler pipe

<5A/T>

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-121

3. Connect the special tools (oil pressure gauge (3.0

MPa) [MD998330] and adapters [MD998332,
MD998900]) to each pressure discharge port.

NOTE:

•

2B: Second brake pressure port

•

UC: Underdrive clutch pressure port

•

LB: Low-reverse brake pressure port

•

TR: Torque converter release pressure port

•

TA: Torque converter apply pressure port

•

RC: Reverse clutch pressure port

•

OC: Overdrive clutch pressure port

•

DC: Direct clutch pressure port <5A/T>

•

RB: Reduction brake pressure port <5A/T>

4. Restart the engine.
5. Check that there are no leaks around the special

tool port adapters.

6. Measure the hydraulic pressure at each port

under the conditions given in the standard
hydraulic pressure table, and check that the
measured values are within the standard value
ranges.

7. If the pressure is not within the standard value,

stop the engine and refer to the hydraulic
pressure test diagnosis table.

8. Remove the O-ring from the port plug and replace

it.

9. Remove the special tool, and install the plugs to

the hydraulic pressure ports.

10.Start the engine and check that there are no leaks

around the plugs.

STANDARD HYDRAULIC PRESSURE TABLE

<4A/T>

Measurement condition

Standard hydraulic pressure MPa

Selecto
r lever
positio
n

Shift
position

Engine
speed
(r/min)

Underdriv
e clutch
pressure
[UC]

Reverse
clutch
pressure
[RC]

Overdrive
clutch
pressure
[OC]

Low-
reverse
brake
pressure
[LB]

Second
brake
pressure
[2B]

Torque
converter
pressure
[TR]

−

2,500

−

0.26

− 0.36 −

0.22

− 0.36

Reverse 2,500

−

1.27

− 1.77 −

1.27

− 1.77 −

0.50

− 0.73

−

2,500

−

0.26

− 0.36 −

0.22

− 0.36

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-122

<5A/T>

Measurement condition

Standard hydraulic pressure MPa

Selector
lever
position

Shift
position

Engine
speed
(r/min)

Underd
rive
clutch
pressur
e [UC]

Revers
e
clutch
pressur
e [RC]

Overdri
ve
clutch
pressur
e [OC]

Direct
clutch
pressur
e [DC]

Low-
reverse
brake
pressur
e [LB]

Second
brake
pressu
re [2B]

Reducti
on
brake
pressur
e [RB]

Torque
convert
er
pressur
e [TR]

−

2,500

−

0.26

−

0.36

−

0.26

−

0.36

0.22

−

0.36

Reverse 2,500

−

1.27

−

1.77

−

1.27

−

1.77

−

1.27

−

1.77

0.50

−

0.73

−

2,500

−

0.26

−

0.36

−

0.26

−

0.36

0.22

−

0.36

Sport
mode

1st gear

2,500

0.98

−

1.05

−

0.98

−

1.05

−

0.98

−

1.05

0.50

−

0.73

2nd gear 2,500

0.98

−

1.05

−

0.98

−

1.05

0.98

−

1.05

0.50

−

0.73

3rd gear 2,500

0.78

−

0.90

−

0.78

−

0.90

−

0.78

−

0.88

0.45

−

0.72

4th gear

2,500

0.78

−

0.90

−

0.78

−

0.90

0.78

−

0.88

−

0.45

−

0.72

5th gear

2,500

−

0.78

−

0.90

0.78

−

0.88

−

0.78

−

0.88

−

0.45

−

0.72

NOTE: When the torque converter pressure is measured, the engine speed should be 1,500 r/min or less.

HYDRAULIC PRESSURE TEST DIAGNOSIS TABLE

D
(Overdri
ve
switch:
OFF)

1st gear

2,500

0.98

− 1.05 −

−

0.98

− 1.05 −

0.50

− 0.73

2nd gear 2,500

0.98

− 1.05 −

−

0.98

− 1.05 0.50 − 0.73

3rd gear 2,500

0.78

− 0.90 −

0.78

− 0.90 −

−

0.45

− 0.72

4th gear

2,500

−

0.78

− 0.90 −

0.78

− 0.88 0.45 − 0.72

Measurement condition

Standard hydraulic pressure MPa

Selecto
r lever
positio
n

Shift
position

Engine
speed
(r/min)

Underdriv
e clutch
pressure
[UC]

Reverse
clutch
pressure
[RC]

Overdrive
clutch
pressure
[OC]

Low-
reverse
brake
pressure
[LB]

Second
brake
pressure
[2B]

Torque
converter
pressure
[TR]

Trouble symptom

Probable cause

All hydraulic pressures are high.

Malfunction of the regulator valve

Content .. 301 302 303 304 ..