Mitsubishi Lancer Evolution X. Manual - part 599

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-353

STEP 3. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the mechatronic assembly. (Refer to 

P.22C-421

.) Then go to Step 4.

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 4. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the clutch assembly. (Refer to GROUP 22D 

−Transaxle 

P.22D-6

.) Then go to Step 5.

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 5. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the transaxle assembly. (Refer to 

P.22C-412

.)

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

INSPECTION PROCEDURE 12: The gear shifting does not occur. (The transaxle does not upshift or 
downshift.)

CAUTION

Whenever the ECU is replaced, ensure that the 
CAN bus lines are normal.

.

COMMENTS ON TROUBLE SYMPTOM

The CAN bus lines, mechatronic assembly, clutch 
assembly, or transaxle assembly may have a prob-
lem.

.

PROBABLE CAUSES

• Malfunction of the CAN bus lines
• Malfunction of the mechatronic assembly
• Malfunction of the clutch assembly
• Malfunction of the transaxle assembly

DIAGNOSTIC PROCEDURE

Required Special Tools:

• MB991958 Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827 M.U.T.-III USB Cable
• MB991910 M.U.T.-III Main Harness A

STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Repair the CAN bus lines. (Refer to GROUP 54C − 

Troubleshooting 

P.54C-15

.) After repairing the CAN 

bus line, go to Step 2.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-354

STEP 2. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the mechatronic assembly. (Refer to 

P.22C-421

.) Then go to Step 3.

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 3. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the clutch assembly. (Refer to GROUP 22D 

−Transaxle 

P.22D-6

.) Then go to Step 4.

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 4. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the transaxle assembly. (Refer to 

P.22C-412

.)

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

INSPECTION PROCEDURE 13: The shift shock is large.

.

COMMENTS ON TROUBLE SYMPTOM

The mechatronic assembly, clutch assembly, or tran-
saxle assembly may have a problem.

.

PROBABLE CAUSES

• Malfunction of the mechatronic assembly
• Malfunction of the clutch assembly
• Malfunction of the transaxle assembly

DIAGNOSTIC PROCEDURE

STEP 1. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the mechatronic assembly. (Refer to 

P.22C-421

.) Then go to Step 2.

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 2. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the clutch assembly. (Refer to GROUP 22D 

−Transaxle 

P.22D-6

.) Then go to Step 3.

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-355

STEP 3. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the transaxle assembly. (Refer to 

P.22C-412

.)

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

INSPECTION PROCEDURE 14: Delay occurs when the lever is shifted from "N" to "D" or "N" to "R".

.

COMMENTS ON TROUBLE SYMPTOM

Fluid may be insufficient or contaminated. 
TC-SST-ECU power supply circuit, mechatronic 
assembly, clutch assembly, or transaxle assembly 
may have a problem.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU power supply circuit
• Insufficient or contaminated fluid
• Malfunction of the mechatronic assembly
• Malfunction of the clutch assembly
• Malfunction of the transaxle assembly

DIAGNOSTIC PROCEDURE

STEP 1. Check the TC-SST-ECU power supply circuit
Refer to 

P.22C-341

.

Q: Is the check result normal?

YES : Go to Step 2.
NO :  Repair the TC-SST-ECU power supply circuit. (Refer 

to 

P.22C-341

.)

STEP 2. Fluid check
Check for the fluid level and if no foreign material and contami-
nation are found.
Q: Is the check result normal?

YES : Go to Step 3.
NO :  Charge or replace the fluid.

STEP 3. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the mechatronic assembly. (Refer to 

P.22C-421

.) Then go to Step 4.

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 4. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the clutch assembly. (Refer to GROUP 22D 

−Transaxle 

P.22D-6

.) Then go to Step 5.

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-356

STEP 5. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the transaxle assembly. (Refer to 

P.22C-412

.)

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

INSPECTION PROCEDURE 15: The engine stops when the lever is shifted from "N" to "D" or "N" to 
"R".

.

COMMENTS ON TROUBLE SYMPTOM

Engine system, mechatronic assembly, or clutch 
assembly may have a problem.

.

PROBABLE CAUSES

• Malfunction of the engine system
• Malfunction of the mechatronic assembly
• Malfunction of the clutch assembly

DIAGNOSTIC PROCEDURE

STEP 1. Check the engine system
Q: Is the check result normal?

YES : Go to Step 2
NO :  Repair the engine system.

STEP 2. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the mechatronic assembly. (Refer to 

P.22C-421

.) Then go to Step 3.

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 3. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the clutch assembly. (Refer to GROUP 22D 

−Transaxle 

P.22D-6

.)

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)