Mitsubishi Outlander GS45X. Manual - part 1617

DIAGNOSIS

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TORQUE CONVERTER STALL TEST

M1231205400162

This test measures the maximum engine speed at the time the 
torque converter stalls with the selector lever in the "D" or "R" 
position. With this test, the holding abilities of the clutch and 
brake that are incorporated in the transaxle can be checked.

WARNING

For safety, operators must not stand in front of and at 
the rear of the vehicle during this test.

1. Check the transmission fluid level, transmission fluid 

temperature, and engine coolant temperature.

• Transmission fluid level: In the "HOT" mark on the dipstick

• Transmission fluid temperature: 70 − 80°C (158 − 176°F)

• Engine coolant temperature: 80 − 100°C (176 − 212°F)

NOTE: Use scan tool MB991958 to measure the transmis-
sion fluid temperature.

2. Raise the vehicle.
3. Pull the parking brake lever, and then fully depress the brake 

pedal.

4. Start the engine.

CAUTION

• Do not maintain the WOT condition for 5 seconds or 

longer.

• When continuing the stall test, make sure that the fluid 

temperature does not exceed 80

°C (176°F). If the trans-

mission fluid temperature exceeds 80

°C (176°F), run 

the engine at around 1,000 r/min for 1 minute or longer 
to lower the transmission fluid temperature to 80

°C 

(176

°F) or less.

5. Move the selector lever to the "D" range and fully depress 

the accelerator pedal. Quickly read the maximum engine 
speed at this time.

Standard value 

− Stall speed: 2,400 − 2,900 r/min

6. Move the selector lever to the "R" range, and then repeat 

the previous step.

Standard value 

− Stall speed: 2,400 − 2,900 r/min

DIAGNOSIS

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JUDGMENT OF TORQUE CONVERTER STALL 
TEST RESULTS

1. Stall speed is high when selector lever is in both "D" and "R" 

ranges.

• Malfunction of the torque converter (Torque converter 

and input shaft spline are slipping) 

• Malfunction of the valve body

• Damaged wiring harness and connectors

• Malfunction of TCM

2. Stall speed is high only when selector lever is in the "D" 

range.

• Forward clutch is slipping

3. Stall speed is high only when the selector lever is in the "R" 

range.

• Reverse brake is slipping

4. Stall speed is low when selector lever is in both "D" and "R" 

ranges.

• Malfunction of the torque converter

• Line pressure is low

• Low engine power

DIAGNOSIS

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HYDRAULIC PRESSURE TEST

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CAUTION

The transmission fluid temperature should be between 70 
− 80°C (158 − 176°F) during the test.
1. Check the transmission fluid level and temperature. Check 

engine coolant temperature.

• Transmission fluid level: "HOT" mark on the dipstick

• Transmission fluid temperature: 70 − 80°C (158 − 176°F)

• Engine coolant temperature: 80 − 100°C (176 − 212°F)

2. Raise the vehicle so that the wheels are free to turn.
3. Connect the special tools (3.0 MPa (427 psi) oil pressure 

gauge [MD998330] and joint [MD998331, MB992127]) to 
each pressure discharge port.
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. Check that there are no leaks around the special tool port 

adapters.

WARNING

For safety, operators must not stand in front of and at 
the rear of the vehicle during this test. 

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.

AC507202 AB

DR

PRI

PL

FWD

AC507203

REV

AB

DIAGNOSIS

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Standard hydraulic pressure table

Hydraulic pressure test diagnosis table

Measuring condition

Standard hydraulic pressure MPa (psi)

Transmission 
range

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 (0)

0.1 

− 1.5  

(15 

− 218)

0.5 

− 1.5  

(73 

− 218)

0.1 

− 1.0  

(15 

− 145)

R

0 (0)

0.5 

− 1.0  

(73 

− 145)

0.1 

− 1.5  

(15 

− 218)

0.5 

− 1.5  

(73 

− 218)

0.1 

− 1.0  

(15 

− 145)

N

0 (0)

0 (0)

0.1 

− 1.5  

(15 

− 218)

0.5 

− 1.5  

(73 

− 218)

0.1 

− 1.0  

(15 

− 145)

D

0.5 

− 1.0  

(73 

− 145)

0 (0)

0.1 

− 1.5  

(15 

− 218)

0.5 

− 1.5  

(73 

− 218)

0.1 

− 1.0  

(15 

− 145)

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
Faulty seal ring A

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
Faulty seal ring B