Mitsubishi L200. Manual - part 301

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-111

WAVEFORM SAMPLE

AC001874

(V)

Waveform A

0

5

AH

(ms)

AC001875

(V)

Waveform B

0

20

40

60

AJ

(ms)

ON-VEHICLE SERVICE

ESSENTIAL SERVICE

A/T FLUID CHECK

M1231103700212

CAUTION

When replacing the transmission with a new one, 
overhauling the existing transmission, or driving 
in a harsh condition, the A/T fluid cooler line 
should always be flushed out and A/T fluid 
should be replaced with a new one.
1. Drive the vehicle until the A/T fluid temperature 

reaches the normal temperature (70 

− 80°C)

NOTE: Measure A/T fluid temperature using 
M.U.T.III.
NOTE: 

AC503813

Fluid level 
[mm]

A/T fluid temperature [    ]

10

0

-10

-20

-30

40

60

80

Gauge

AB

-40

HO

T

Check the fluid level referring to the characteris-
tics chart shown at left if it takes some time to 
reach the normal operation temperature of A/T 
fluid (70 

−

 80

°

C).

2. Park the vehicle on a level surface.
3. Move the selector lever to all positions to fully 

charge the torque converter and the fluid lines 
with A/T fluid, and then move the selector lever to 
the P position.

4. After wiping away any dirt from around the oil 

level gauge, pull out the oil level gauge and check 
the level of A/T fluid. 

NOTE: If the A/T fluid has a burnt smell, or if it has 
become very contaminated or dirty, it means that 
the A/T fluid has become contaminated by minute 
particles form bushings (metal) or worn parts. In 
such a case, the transmission needs to be over-
hauled and the A/T fluid cooler line needs to be 
flushed out.

AC000846 AB

5. Check that the A/T fluid level is between the HOT 

marks on the oil level gauge. If the A/T fluid level 
is too low, add more A/T fluid until the level 
reaches between the HOT marks.

Automatic transmission fluid: DIA QUEEN 
ATF SP III

NOTE: If the A/T fluid level is too low, the oil pump 
draws air into the system along with the A/T fluid, 
and air bubbles will thus from in the fluid circuit. 
This will cause a drop in fluid pressure and cause 
the shift points to change and the clutches and 
brakes to slip.

 

If the A/T fluid level is too high, the gear will churn 
the A/T fluid and cause bubbles to develop, which 
can then cause the same problems as when the 
A/T fluid is too low.

 

In either case, the air bubbles can cause over-
heating and oxidation of the A/T fluid, and also 

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-112

prevent the valves, clutches and brakes from 
operating normally. In addition, if bubbles develop 
in the A/T fluid, the A/T fluid can overflow from the 
transmission vent holes and be mistaken for 
leaks.

6. Securely re-insert the oil level gauge.

A/T FLUID CHANGE

M1231104100279

CAUTION

Before replacing the transmission with a new 
one, overhauling the existing transmission, or 
connecting the cooler pipe to the transmission, 
the A/T fluid cooler line should always be flushed 
out.
In you have an A/T fluid changer, use the A/T fluid 
changer to flush the A/T fluid. If you do not have an 
A/T fluid changer, follow the procedure given below.

AC503850AB

1. Remove the hose shown in the illustration which 

allows the A/T fluid to flow from the A/T fluid 
cooler to the transmission.

CAUTION

The engine should be stopped within one minute 
of it being started. If the A/T fluid has all been dis-
charged before this, stop the engine at that point.
2. Start the engine and discharge the A/T fluid.

Driving conditions: N range, idling

Discharge amount: Approx. 3.5 L 

AC503264AB

Drain plug

3. Remove the drain plug at the bottom of the 

transmission case to drain out the remaining A/T 
fluid.

Discharge amount: Approx. 2.0 L

4. Install the drain plug with a gasket in between, 

and tighten it to the specified torque.

Tightening torque: 32 

± 2 N⋅m

CAUTION

Stop pouring in the A/T fluid once 5.5 L has been 
poured in.
5. Pour the new A/T fluid in through the oil filler tube.

Amount to add: Approx. 5.5 L

6. Repeat the operation in step 2.
7. Pour in new A/T fluid through the oil filler tube.

Amount to add: Approx. 3.5 L

NOTE: Carry out steps 2 and 7 so that at least 8.0 
L has been discharged from the cooler hose. After 
this, discharge a small quantity of A/T fluid and 
check for contamination. If the A/T fluid is contam-
inated, repeat steps 6 and 7.

AC503850AB

8. Connect the hose which was disconnected in step 

1, and then securely re-insert the oil level gauge.

9. Start the engine, and let it run at idle for 1 

− 2 

minutes.

10.Move the selector lever to all positions once, and 

then return it to the N position.

AC000846 AB

11.Check that the A/T fluid level on the oil level 

gauge is at the COLD mark. if it is not up to this 
mark, add more A/T fluid.

12.Drive the vehicle until the A/T fluid temperature 

reaches the normal temperature (70 

− 80°C), and 

then re check the A/T fluid level.

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-113

NOTE: The COLD mark is for reference only; the 
HOT marks should be used as the standard for 
judgment.
NOTE: A/T fluid temperature using M.U.T.-III.
NOTE: 

AC503813

Fluid level 
[mm]

A/T fluid temperature [    ]

10

0

-10

-20

-30

40

60

80

Gauge

AB

-40

HO

T

Check the fluid level referring to the characteris-
tics chart shown at left if it takes some time until 
reaching the normal operation temperature of A/T 
fluid (70 

−

 80

°

C.) 

13.When A/T fluid is under the specified level, top up 

A/T fluid. When A/T fluid is over the specified 
level, drain the excessive A/T fluid from the drain 
plug to adjust A/T fluid level to the specified level.

14.Securely insert the oil level gauge into the oil filler 

tube.

FLUSHING COOLERS AND TUBES

M1231104800193

CAUTION

If replacing the transmission with a new one, if 
overhauling the existing transmission, or if the A/
T fluid has deteriorated or is contaminated, the A/
T fluid cooler line must always be flushed out.

AC503850AB

1. Remove the hose shown in the illustration which 

allows the A/T fluid to flow from the A/T fluid 
cooler to the transmission.

CAUTION

The engine should be stopped within one minute 
of it being started. If the A/T fluid has all been dis-
charged before this, stop the engine at that point.
2. Start the engine and discharge the A/T fluid.

Driving conditions: N range, idling

Discharge amount: Approx. 3.5 L

CAUTION

Stop pouring in the A/T fluid once 3.5 L has been 
poured in.
3. Pour in new A/T fluid through the oil filler tube.

Amount to add: Approx. 3.5 L

4. Repeat the operation in step 2 and 3.

NOTE: Carry out steps 2 and 3 so that at least 8.0 
L has been discharged from the cooler hose. After 
this, discharge a small quantity of A/T fluid and 
check for contamination. If the A/T fluid is contam-
inated, repeat steps 2 and 3.

5. Carry out the procedure in "A/T Fluid Change" 

from step 2 onwards.

INHIBITOR SWITCH CONTINUITY CHECK

M1231101900328

AC503900AB

Inhibitor switch

AC503910AE

P

R

N

D

<5A/T>

AC503910AD

P

R

N

D

2

L

<4A/T>

Item

Terminal No.

Resistance

P

1 

− 7, 9 − 10

Continuity (Less 
than 2

Ω)

R

7 

− 8

N

2 

− 7, 9 − 10

D

3 

− 7

2 <4A/T>

4 

− 7

L <4A/T>

5 

− 7

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-114

INHIBITOR SWITCH AND CONTROL 
CABLE ADJUSTMENT

M1231109700168

1. Move the selector lever to the N position.
2. Loosen the adjusting nut, and set the manual 

control lever upper and lower to the free condition.

3. Move the manual control lever lower to the neutral 

position.

AC503967

A

A

11 

±

 1 N·m

Manual control 
lever lower

Mounting bolts

Section A-A

Hole in
flange

Manual control 
lever upper

Inhibitor
switch

AB

End hole

Transmission 
control cable

Manual 
control 
lever lower

Adjusting nut

23 

±

 4 N·m

4. Loosen the inhibitor switch mounting bolt, and 

then turn the inhibitor switch to adjust so that the 
hole at the end of the manual control lever lower 
and the hole in the inhibitor switch flange (section 
A 

− A in the illustration at left) are aligned.

NOTE: The inhibitor switch can be aligned by 
hand, because the manual control lever lower end 
is as wide as the switch flange. Alternatively, the 
inhibitor switch can also be aligned by inserting a 
5-mm bar in the holes of the manual control lever 
end and the inhibitor switch flange.

CAUTION

Be careful not let the inhibitor switch slip out of 
place.
5. Tighten the inhibitor switch mounting bolt to the 

specified torque.

Tightening torque: 11 

± 1 N⋅m

AC503971

Adjusting nut

AB

Transmission 
control cable

6. Gently push the transmission control cable in the 

direction as shown in the illustration at left, and 
tighten the adjusting nut the specified torque.

Tightening torque: 23 

± 4 N⋅m

7. Check that the selector lever is at the N position.
8. Check that the transmission shifts to the correct 

range corresponding to the position of the selector 
lever, and that it functions correctly in that range.

TRANSFER OIL CHECK <4WD>

M1231112400305

AC502640AB

Filler plug

Drain plug

AC700330AM

Gasket

Transfer oil

Filler plug hole

Filler plug

1. Remove the filler plug and gasket.
2. Check that the oil level is up to the lower edge of 

the filler plug hole.