Mitsubishi Lancer Evolution X. Manual — part 497

.) After repairing the CAN

bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. U0001 set?

YES : Replace the AWC-ECU.(Refer to

.) Then

go to Step 3.

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

to Cope with Intermittent Malfunction

STEP 3. Check whether the DTC is reset.
Q: Is DTC No. U0001 set?

YES : Return to Step 1.
NO : This diagnosis is complete.

DTC U0100: Engine 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.

OPERATION

AWC-ECU communicates with the engine control
module via the CAN bus lines.

DTC SET CONDITIONS

The code is set when the signal sent from the engine
ECU cannot be received for a certain period.

PROBABLE CAUSES

• The CAN bus line is defective.
• Malfunction of engine control module
• Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

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

.) After repairing the CAN

bus line, go to Step 2.

DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>

TSB Revision

MANUAL TRANSAXLE

22A-82

STEP 2. Scan tool diagnostic trouble code
Check the engine diagnostic trouble code. (Refer to GROUP
13A − Troubleshooting

P.13A-48

Q: Is the DTC set?

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

STEP 3. Check whether the DTC is reset.
Q: Is DTC No. U0100 set?

YES : Replace the AWC-ECU.(Refer to

.) Then

go to Step 4.

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

to Cope with Intermittent Malfunction

STEP 4. Check whether the DTC is reset.
Q: Is DTC No. U0100 set?

YES : Return to Step 1.
NO : This diagnosis is complete.

DTC U0101: TC-SST 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.

OPERATION

AWC-ECU communicates with TC-SST-ECU via the
CAN bus lines.

DTC SET CONDITIONS

The code is set when the signal sent from the
TC-SST-ECU cannot be received for a certain
period.

PROBABLE CAUSES

• The CAN bus line is defective.
• Malfunction of TC-SST-ECU
• ETACS coding data error
• Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

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

STEP 2. Scan tool diagnostic trouble code
Check the TC-SST diagnostic trouble code. (Refer to GROUP
22C − Troubleshooting

P.22C-15

Q: Is the DTC set?

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

DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>

TSB Revision

MANUAL TRANSAXLE

22A-83

STEP 3. ETACS-ECU coding data check
Check the transaxle coding data stored in ETACS-ECU for any
abnormality. (Refer to GROUP 00 − Coding Reference Table

P.00-26

Q: Is the check result normal?

YES : Go to Step 4.
NO : Replace the ETACS-ECU. (Refer to GROUP 54A −

ETACS-ECU

P.54A-742

.) Then go to Step 5.

STEP 4. Check whether the DTC is reset.
Q: Is DTC No. U0101 set?

YES : Replace the AWC-ECU.(Refer to

.) Then

go to Step 5.

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

to Cope with Intermittent Malfunction

STEP 5. Check whether the DTC is reset.
Q: Is DTC No. U0101 set?

YES : Return to Step 1.
NO : This diagnosis is complete.

DTC U0121: ASC 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.

OPERATION

AWC-ECU communicates with the ASC-ECU via the
CAN bus lines.

DTC SET CONDITIONS

The code is set when the signal sent from the
ASC-ECU cannot be received for a certain period.

PROBABLE CAUSES

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

DIAGNOSTIC PROCEDURE

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

DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>

TSB Revision

MANUAL TRANSAXLE

22A-84

STEP 2. Scan tool diagnostic trouble code
Check the ASC diagnostic trouble code. (Refer to GROUP 35C
− Troubleshooting

P.35C-22

Q: Is the DTC set?

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

STEP 3. Check whether the DTC is reset.
Q: Is DTC No. U0121 set?

YES : Replace the AWC-ECU. (Refer to

.) Then

go to Step 4.

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

to Cope with Intermittent Malfunction

STEP 4. Check whether the DTC is reset.
Q: Is DTC No. U0121 set?

YES : Return to Step 1.
NO : This diagnosis is complete.

DTC U0126: Steering Wheel Sensor 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.

• When the steering wheel sensor is replaced,

calibrate the steering wheel sensor (refer to
GROUP 35C − On-vehicle Service

P.35C-289

and initialize the steering angle correction
amount stored in AWC-ECU. (Item No.1:
Steering angle correction amount initializa-
tion

P.22A-114

OPERATION

AWC-ECU communicates with the steering wheel
sensor via the CAN bus lines.

DTC SET CONDITIONS

The code is set when the signal sent from the steer-
ing wheel sensor cannot be received for a certain
period.

PROBABLE CAUSES

• The CAN bus line is defective.
• Malfunction of steering wheel sensor
• Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

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