Mitsubishi Evolution X. Manual — part 339
MANUAL TRANSAXLE DIAGNOSIS <MANUAL TRANSAXLE>
TSB Revision
MANUAL TRANSAXLE
22A-5
MANUAL TRANSAXLE DIAGNOSIS
<MANUAL TRANSAXLE>
INTRODUCTION
M1221006900778
The manual transaxle can exhibit any of the following
symptoms: noise or vibration is generated, oil leaks,
shifting gears is hard or troublesome, or the tran-
saxle jumps out of gear.
The causes of these symptoms could come from:
incorrect mounting, the oil level may be low, or a
component of the transaxle may be faulty.
TROUBLESHOOTING STRATEGY
M1221007000712
Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find a
manual transaxle fault.
1. Gather information from the customer.
2. Verify that the condition described by the
customer exists.
3. Find the malfunction by following the Symptom
Chart.
4. Verify malfunction is eliminated.
SYMPTOM CHART
M1221007100838
Symptom
Inspection
procedure
Reference page
Noise, Vibration
1
Oil Leaks
2
Hard Shifting
3
Jumps Out of Gear
4
SYMPTOM PROCEDURES
Inspection Procedure 1: Noise, Vibration
DIAGNOSTIC PROCEDURE
STEP 1. Check the idle speed.
Q: Does the idle speed meet the standard values?
YES : Go to Step 2.
NO : Refer to GROUP 11A, On-vehicle Service
− Idle
Speed Check
STEP 2. Check whether the transaxle and engine mount is
loose or damaged.
Q: Are the transaxle and engine mount loose or damaged?
YES : Tighten or replace the part. Then go to Step 7.
NO : Go to Step 3.
MANUAL TRANSAXLE DIAGNOSIS <MANUAL TRANSAXLE>
TSB Revision
MANUAL TRANSAXLE
22A-6
STEP 3. Check that the oil level is up to the lower edge of
the filler plug hole.
AC700330AE
Gasket
Transmission oil
Filler plug hole
Oil filler plug
Q: Is the oil level up to the lower edge of the filler plug
hole?
YES : Go to Step 4.
NO : Refill DiaQueen NEW MULTI GEAR OIL API
classification GL-3, SAE 75W-80. Then go to Step 7.
STEP 4. Check for the specified oil.
Q: Is the specified oil DiaQueen NEW MULTI GEAR OIL API
classification GL-3, SAE 75W-80?
YES : Go to Step 5.
NO : If in doubt, replace the oil. Refer to
. Then
go to Step 7.
STEP 5. Remove the transaxle. Check the end play of the
input and output shafts.
Q: Does the end play of the input and output shafts meet
the standard value?
YES : Go to Step 6.
NO : Adjust the end play of the input and output shafts.
Then go to Step 7.
STEP 6. Disassemble the transaxle. Check the gears for
wear and damage.
Q: Are the gears worn or damaged?
YES : Replace the gears. Go to Step 7.
NO : Go to Step 7.
STEP 7. Retest the systems.
Q: Is the noise or vibration still there?
YES : Return to Step 1.
NO : The procedure is complete.
Inspection Procedure 2: Oil Leaks
DIAGNOSTIC PROCEDURE
STEP 1. Visual check.
Raise the vehicle, and check for oil leaks. If oil leak is
difficult to locate, steam clean the transaxle and drive
the vehicle for at 10 minutes. Then check the leak
again.
Q: Is the oil leak(s) found?
YES :
Go to Step 2.
NO :
Check for the oil leaks around the engine.
Then go to Step 4.
MANUAL TRANSAXLE DIAGNOSIS <MANUAL TRANSAXLE>
TSB Revision
MANUAL TRANSAXLE
22A-7
STEP 2. Visual check at the clutch housing.
Q: Do oil leaks appear around the joint between the
engine and the clutch housing?
YES :
Remove the transaxle. Check the input
shaft oil seal, and replace if necessary.
Then go to Step 4.
NO :
Go to Step 3.
STEP 3. Check the oil seal or O-ring for damage.
Q: Is the oil seal or O-ring damaged?
YES :
Replace the oil seal or the O-ring. Then go
to Step 4.
NO :
Go to Step 4.
STEP 4. Retest the system.
Q: Is the oil still leaking?
YES :
Return to Step 1.
NO :
The procedure is complete.
Inspection Procedure 3: Hard Shifting
DIAGNOSTIC PROCEDURE
STEP 1. Check the transaxle control
Q: Are the shift cable and the select cable in good
condition?
YES :
Go to Step 2.
NO :
Repair or replace the shift cable and the
select cable. Refer to
. Then go
to Step 7.
STEP 2. Check the transaxle oil.
Q: Is the oil dirty?
YES :
Replace the oil. Refer to
. Then
go to Step 7
NO :
Go to Step 3.
STEP 3. Check the clutch system.
Q: Is the clutch system normal?
YES :
Go to Step 4.
NO :
Repair or replace the clutch system. Refer
to GROUP 21B, Clutch
. Then go to
Step 7.
STEP 4. Remove and disassemble the transaxle.
Check the control housing.
Q: Is the control housing in good condition?
YES :
Go to Step 5.
NO :
Repair or replace the control housing (Refer
to GROUP 22B, Transaxle
) Then
go to Step 7.
STEP 5. Check for poor meshing or worn
synchronizer ring and gear cone.
Q: Is poor meshing or worn synchronizer ring and
gear cone found?
YES :
Repair or replace the synchronizer ring and
gear cone. Then go to Step 7.
NO :
Go to Step 6.
STEP 6. Check the synchronizer spring for
weakness.
Q: Is the synchronizer spring weak?
YES :
Replace the synchronizer spring. Then go
to Step 7.
NO :
Go to Step 7.
STEP 7. Retest the system.
Q: Is the shifting of the gears still hard?
YES :
Return to Step 1.
NO :
The procedure is complete.
DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>
TSB Revision
MANUAL TRANSAXLE
22A-8
Inspection Procedure 4: Jumps Out of Gear
DIAGNOSTIC PROCEDURE
STEP 1. Check the transaxle control
Q: Are the gearshift cable and the select cable in good
condition?
YES :
Go to Step 2.
NO :
Repair or replace the gearshift cable and
the select cable. Refer to
. Then
go to Step 5.
STEP 2. Remove and disassemble the transaxle.
Check the control housing.
Q: Is the control housing in good condition?
YES :
Go to Step 3.
NO :
Repair or replace the control housing (Refer
to GROUP 22B, Transaxle
) Then
go to Step 5.
STEP 3. Check the shift forks for wear.
Q: Is the shift forks worn?
YES :
Replace the shift fork. Refer to GROUP
NO :
Go to Step 4.
STEP 4. Check the clearance.
Q: Is the clearance between the synchronizer hub and
sleeve excessive?
YES :
Replace the synchronizer hub or sleeve.
Refer to GROUP 22B, Input Shaft
and Output Shaft
. Then go to Step
5.
NO :
Go to Step 5.
STEP 5. Retest the system.
Q: Does the transaxle still jump out of gear?
YES :
Return to Step 1.
NO :
The procedure is complete.
DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>
INTRODUCTION
M1221006900831
The S-AWC system can exhibit any of the following
symptoms: noise or vibration is generated or fluid
leaks.
The causes of these symptoms could come from:
incorrect mounting, the fluid level may be low, or a
component of the S-AWC may be faulty.
TROUBLESHOOTING STRATEGY
M1221007000790
Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will find most S-AWC
malfunctions.
1. Gather as much information as possible about the
complaint from the customer.
2. Verify that the condition described by the
customer exists.
3. Check the vehicle for any S-AWC Diagnostic
Trouble Codes (DTCs).
4. If you can not verify the condition and there are no
DTCs, the malfunction is intermittent. For
information on how to cope with intermittent
malfunctions, refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How
to Cope with Intermittent Malfunction
5. If you can verify the condition but there are no
DTCs, or the system can not communicate with
scan tool, refer to the Symptom Chart
.
6. If there is a DTC, record the number of the code,
then erase the code from memory using scan tool.
7. Reconfirm the symptom.
8. If a DTC is set again, go to the Inspection Chart
for Diagnostic Trouble Codes.
9. If a DTC is not set again, the malfunction is
intermittent. For information on how to cope with
intermittent malfunctions, refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points
− How to Cope with Intermittent
Malfunction
10.Verify malfunction is eliminated. After repairs are
completed, the complaint conditions to confirm
the malfunction has been eliminated.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст