Mitsubishi Outlander GS45X. Manual - part 1710

AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>

TSB Revision

AUTOMATIC TRANSAXLE

23C-145

STEP 7. Remove the transaxle assembly from the vehicle.
Disassemble and check the transaxle assembly to check if 
there is a foreign material inside.
Q: Is the check result satisfactory?

YES : Replace the transaxle assembly.
NO :  Replace the failure part.

INSPECTION PROCEDURE 9: The shift shock is large at a certain gear shift. (1st to 2nd, 2nd to 3rd, 
etc.)

.

TROUBLESHOOTING HINTS (THE MOST 
LIKELY CAUSES FOR THIS CONDITION:)

• Malfunction of the engine: Engine output change

• Malfunction of the TCM

• A/T failure: Hydraulic system (valve body assem-

bly), driving force transmission system 
(clutch/brake)

NOTE: When the engine output is low, shock occurs. 
Care must also be taken during cold, after warm up, 
and temperature, humidity, and air pressure differ-
ences.

DIAGNOSIS

STEP 1. Check the engine performance.

• Check the ECM side especially for throttle signal-related 

abnormality.

• Check the stall speed (refer to 

P.23C-24

). If the speed is 

low, check the engine side.

Q: Is the check result normal?

YES : Go to Step 2.
NO :  Repair the failure, and perform adjustment.

STEP 2. Replace the TCM.
Q: Is the failure resolved?

YES : The procedure is complete.
NO :  Go to Step 3.

STEP 3. Perform a hydraulic test.
Refer to 

P.23C-26

.

Q: Is the check result normal?

YES : The procedure is complete.
NO :  Go to Step 4.

STEP 4. Compare with another same model vehicle.
Q: Is there a difference from the same model vehicle?

YES : Go to Step 5.
NO :  The procedure is complete.

AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>

TSB Revision

AUTOMATIC TRANSAXLE

23C-146

STEP 5. Remove the transaxle assembly from the vehicle.
Disassemble and check the transaxle assembly to check if 
there is a foreign material inside.
Q: Is the check result satisfactory?

YES : Replace the transaxle assembly.
NO :  Replace the failure part.

INSPECTION PROCEDURE 10: The select shock is large when the transmission range is shifted from 
"N" to "D", and "N" to "R."

.

TROUBLESHOOTING HINTS (THE MOST 
LIKELY CAUSES FOR THIS CONDITION:)

• Malfunction of the engine: Idle speed

• Poor adjustment of transmission range switch

• Malfunction of the TCM

• A/T failure: Hydraulic system (valve body assem-

bly), driving force transmission system 
(clutch/brake)

DIAGNOSIS

STEP 1. Check the engine performance.
Especially check that the idle speed does not exceed the spec-
ified value.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Repair the failure, and perform adjustment.

STEP 2. Check and adjust the transmission range switch.
Refer to 

P.23C-269

, 

P.23C-269

.

If the transmission range switch has a failure, replace it, and 
then check the trouble symptom again.
Q: Is the check result normal?

YES : The procedure is complete.
NO :  Go to Step 3.

STEP 3. Replace the TCM.
Q: Is the failure resolved?

YES : The procedure is complete.
NO :  Go to Step 4.

STEP 4. Compare with another same model vehicle.
Q: Is there a difference from the same model vehicle?

YES : Go to Step 5.
NO :  The procedure is complete.

STEP 5. Remove the transaxle assembly from the vehicle.
Disassemble and check the transaxle assembly to check if 
there is a foreign material inside.
Q: Is the check result satisfactory?

YES : Replace the transaxle assembly.
NO :  Replace the failure part.

AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>

TSB Revision

AUTOMATIC TRANSAXLE

23C-147

INSPECTION PROCEDURE 11: Abnormal sound occurs during idling.

.

TROUBLESHOOTING HINTS (THE MOST 
LIKELY CAUSES FOR THIS CONDITION:)

• Malfunction of the engine: Abnormal sound of 

auxiliary parts

• Transmission fluid level

• Installation of torque converter

• A/T failure: Hydraulic system (valve body assem-

bly, hydraulic circuit)

NOTE: 

.

Inspection items for abnormal sound

1. Check of sound source and incoming route (radi-

ated sound, propagation sound, resonance, etc.), 
and measurement at driver's seat, front passen-
ger's seat, and rear passenger's seat

2. Change of sound during cold and after warm up 

(Change of fluid, and hydraulic pressure)

3. Change of sound with the engine speed
4. Check of tone, and continuous/discontinuous 

sound

DIAGNOSIS

STEP 1. Check the engine performance.
Check the sound of engine, auxiliary parts, and resonance/non-
resonance.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Repair the failure, and perform adjustment.

STEP 2. Check the transmission fluid level.
Check if the transmission fluid level is adequate.
Q: Is the check result normal?

YES : Go to Step 4.
NO :  Go to Step 3.

STEP 3. Check and repair the leakage point of the 
transmission fluid.
Check and repair the leakage point of the transmission fluid, 
and adjust the transmission fluid level. Then check if the abnor-
mal sound is generated.
Q: Is the check result normal?

YES : The procedure is complete.
NO :  Go to Step 4.

STEP 4. Check the transmission fluid.
Check the transmission fluid for burning, fouling, and foreign 
material.
Q: Is the check result normal?

YES : Go to Step 5.
NO :  Go to Step 8.

STEP 5. Retest the system.
Check if the abnormal sound during idling occurs with vibration.
Q: Is the check result normal?

YES : Go to Step 6.
NO :  Go to Step 7.

AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>

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AUTOMATIC TRANSAXLE

23C-148

STEP 6. Check the torque converter.
Check the torque converter installation, change the installation 
phase, and then check the trouble symptom.
Q: Is the check result normal?

YES : The procedure is complete.
NO :  Go to Step 7.

STEP 7. Compare with another same model vehicle.
Q: Is there a difference from the same model vehicle?

YES : Go to Step 8.
NO :  The procedure is complete.

STEP 8. Remove the transaxle assembly from the vehicle.
Disassemble and check the transaxle assembly to check if 
there is a foreign material inside.
Q: Is the check result satisfactory?

YES : Replace the transaxle assembly.
NO :  Replace the failure part.

INSPECTION PROCEDURE 12: Abnormal sound occurs during driving.

.

TROUBLESHOOTING HINTS (THE MOST 
LIKELY CAUSES FOR THIS CONDITION:)

• Engine- and body-related failures: Abnormal 

sound of auxiliary parts, drive shaft, wheel bear-
ing 

• Installation of non-genuine aeroparts to the body

• Abnormal incoming route of sound: Installation of 

transaxle control cable, damping device, sound 
isolation device

• Malfunction of the torque converter

• A/T failure: Driving force transmission system 

(gear), hydraulic system (valve body assembly, 
hydraulic circuit)

NOTE: 

.

Inspection items for abnormal sound

1. Check of sound source and incoming route (radi-

ated sound, propagation sound, resonance, etc.), 
and measurement at driver's seat, front passen-
ger's seat, and rear passenger's seat

2. Change of sound during cold and after warm up 

(Change of fluid, and hydraulic pressure)

3. Change of sound with the engine speed (r/min 

order change)

4. Change of sound with the vehicle speed (r/min 

order change, wind noise)

5. Change of sound with the throttle valve opening 

(engine output change, hydraulic pressure 
change)

DIAGNOSIS

STEP 1. Check the body and engine performance.

• Check if a non-genuine aeropart is installed to the body.

• Check the engine auxiliary parts, drive shaft, and wheel 

bearing.

• Check if the abnormal sound changes in accordance with 

the engine speed, or the vehicle speed.

Q: Is the check result normal?

YES : Go to Step 2.
NO :  Repair the failure, and perform adjustment.