Mitsubishi Lancer Evolution X. Manual — part 594

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-333

STEP 3. Check whether the DTC is reset.
After 15 seconds with the engine idle status, check that the
DTC is reset.
Q: Is DTC No. U0121 set?

YES : Replace the mechatronic assembly. (Refer to

P.22C-421

.)

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

to Cope with Intermittent Malfunction

P.00-15

.)

DTC U0136: AWC Time-out Error

CAUTION

• If there is any problem in the CAN bus lines,

an incorrect diagnostic trouble code may be
set. Prior to this diagnosis, diagnose the CAN
bus lines.

• Whenever the ECU is replaced, ensure that

the CAN bus lines are normal.

.

DESCRIPTIONS OF MONITOR METHODS

The periodic communication data from the engine
control module cannot be received.

.

PROBABLE CAUSES

• The CAN bus line is defective.
• Malfunction of AWC-ECU
• Malfunction of TC-SST-ECU

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 the scan tool, 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

.)

STEP 2. Scan tool diagnostic trouble code
Check the AWC diagnostic trouble code. (Refer to GROUP 22A
− Troubleshooting

P.22A-12

.)

Q: Is the DTC set?

YES : Perform the relevant troubleshooting.
NO : Go to Step 3.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-334

STEP 3. Check whether the DTC is reset.
After 10 or more seconds have passed with the ignition switch
ON position, check that the DTC is reset.
Q: Is DTC No. U0136 set?

YES : Replace the mechatronic assembly. (Refer to

P.22C-421

.)

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

to Cope with Intermittent Malfunction

P.00-15

.)

DTC U0141: ETACS Time-out Error

CAUTION

• If there is any problem in the CAN bus lines,

an incorrect diagnostic trouble code may be
set. Prior to this diagnosis, diagnose the CAN
bus lines.

• Whenever the ECU is replaced, ensure that

the CAN bus lines are normal.

.

DESCRIPTIONS OF MONITOR METHODS

The periodic communication data from the
ETACS-ECU cannot be received.

.

PROBABLE CAUSES

• The CAN bus line is defective.
• Malfunction of the ETACS-ECU
• Malfunction of TC-SST-ECU

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 the scan tool, 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.

STEP 2. Scan tool diagnostic trouble code
Check the ETACS diagnostic trouble code. (Refer to GROUP
54A − Troubleshooting

P.54A-646

.)

Q: Is the DTC set?

YES : Perform the relevant troubleshooting.
NO : Go to Step 3.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-335

STEP 3. Check whether the DTC is reset.
After 15 seconds with the engine idle status, check that the
DTC is reset.
Q: Is DTC No. U0141 set?

YES : Replace the mechatronic assembly. (Refer to

P.22C-421

.)

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

to Cope with Intermittent Malfunction

P.00-15

.)

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: The scan tool cannot communicate with TC-SST-ECU.

CAUTION

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

.

COMMENTS ON TROUBLE SYMPTOM

The CAN bus line, TC-SST-ECU power supply cir-
cuit, or TC-SST-ECU may have a problem.

.

PROBABLE CAUSES

• Wrong M.U.T.-III wiring harness
• The CAN bus line is defective.
• Malfunction of TC-SST-ECU power supply circuit
• Malfunction of TC-SST-ECU
• ECU malfunction of other system

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 : Check and repair the TC-SST-ECU power supply

circuit. (Refer to

P.22C-341

.)

NO : Repair the CAN bus lines. (Refer to GROUP 54C −

Troubleshooting

P.54C-15

.)

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-336

INSPECTION PROCEDURE 2: The driving mode cannot be changed.

CAUTION

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

.

COMMENTS ON TROUBLE SYMPTOM

The twin clutch SST control mode switch, or
TC-SST-ECU may have a problem.

.

PROBABLE CAUSES

• Malfunction of the twin clutch SST control mode

switch

• Damaged harness wires and connectors
• Malfunction of the shift lever-ECU
• Malfunction of TC-SST-ECU

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

CPU

SHIFT LEVER

TWIN CLUTCH
SPORT SHIFT
TRANSAXLE
CONTROL
MODE SWITCH

Twin clutch sport shift transaxle control mode switch circuit

AC705170AL

Connector: C-27-2