Mitsubishi Evolution X. Manual — part 358
DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>
TSB Revision
MANUAL TRANSAXLE
22A-81
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.
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
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
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
.)
Q: Is the check result normal?
YES : Go to Step 4.
NO : Replace the ETACS-ECU. (Refer to GROUP 54A
−
ETACS-ECU
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
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
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
and initialize the steering angle correction
amount stored in AWC-ECU. (Item No.09:
Steering angle correction amount initializa-
tion
.
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
.)
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