Mitsubishi Outlander GS45X. Manual - part 1731

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-229

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.
Use scan tool to perform the CAN bus diagnosis.
Q: Is the check result normal?

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

− 

Troubleshooting 

P.54C-17

).

STEP 2. M.U.T.-III diagnostic trouble code.
Check the ETACS diagnostic trouble code. (Refer to GROUP 
54A 

− Troubleshooting 

P.54A-732

).

Q: Is the diagnostic trouble code set?

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

STEP 3. Check whether the diagnostic trouble code is 
reset.
Q: Is diagnostic trouble code No.U0141 set?

YES : Replace the AWC-ECU. (Refer to 

P.23C-295

). Then 

go to Step 4.

NO :  Intermittent malfunction. (Refer to GROUP 00 

− How 

to Cope with Intermittent Malfunction 

P.00-15

).

STEP 4. Check whether the diagnostic trouble code is 
reset.
Q: Is diagnostic trouble code No.U0141 set?

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

Code No.U0401: Engine Data Malfunction

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 ECM via the CAN 
bus lines.

.

DIAGNOSTIC TROUBLE CODE SET 
CONDITIONS

The code is set when abnormality is detected in the 
signal received from the ECM.

.

PROBABLE CAUSES

• Malfunction of the CAN bus line

• Engine malfunction

• Malfunction of ECM

• Malfunction of AWC-ECU

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-230

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.
Use scan tool to perform the CAN bus diagnosis.
Q: Is the check result normal?

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

− 

Troubleshooting 

P.54C-17

).

STEP 2. M.U.T.-III diagnostic trouble code.
Check the engine diagnostic trouble code. (Refer to GROUP 
13B 

− Troubleshooting 

P.13B-50

).

Q: Is the diagnostic trouble code set?

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

STEP 3. M.U.T.-III data list.
Check the following data list. (Refer to 

P.23C-254

).

• Item No.12: Engine speed

• Item No.13: Engine torque (Driver request value)

Q: Is the check result normal?

YES : Intermittent malfunction. (Refer to GROUP 00 

− How 

to Cope with Intermittent Malfunction 

P.00-15

).

NO :  Go to Step 4.

STEP 4. Check whether the diagnostic trouble code is 
reset.
Q: Is diagnostic trouble code No.U0401 set?

YES : Replace the AWC-ECU. (Refer to 

P.23C-295

). Then 

go to Step 5.

NO :  Intermittent malfunction. (Refer to GROUP 00 

− How 

to Cope with Intermittent Malfunction 

P.00-15

).

STEP 5. Check whether the diagnostic trouble code is 
reset.
Q: Is diagnostic trouble code No.U0401 set?

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

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-231

Code No.U0428: Steering Wheel Sensor Data Malfunction

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-283

), 

and reset the steering wheel sensor correc-
tion amount stored in the AWC-ECU. (Item No. 
1: SAS adjusted value 

P.23C-256

).

.

OPERATION

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

.

DIAGNOSTIC TROUBLE CODE SET 
CONDITIONS

The code is set when abnormality is detected in the 
signal received from the steering wheel sensor.

.

PROBABLE CAUSES

• Malfunction of the CAN bus line

• Malfunction of the steering wheel sensor

• Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.
Use scan tool to perform the CAN bus diagnosis.
Q: Is the check result normal?

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

− 

Troubleshooting 

P.54C-17

).

STEP 2. M.U.T.-III data list.
Item No.8: Steering angle sensor (refer to 

P.23C-254

).

Q: Is the check result normal?

YES : Intermittent malfunction. (Refer to GROUP 00 

− How 

to Cope with Intermittent Malfunction 

P.00-15

).

NO :  Replace the steering wheel sensor. (Refer to GROUP 

35C 

− Steering Wheel Sensor 

P.35C-291

). Then go to 

Step 3.

STEP 3. Check whether the diagnostic trouble code is 
reset.
Q: Is diagnostic trouble code No.U0428 set?

YES : Replace the AWC-ECU. (Refer to 

P.23C-295

). Then 

go to Step 4.

NO :  Intermittent malfunction. (Refer to GROUP 00 

− How 

to Cope with Intermittent Malfunction 

P.00-15

).

STEP 4. Check whether the diagnostic trouble code is 
reset.
Q: Is diagnostic trouble code No.U0428 set?

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

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-232

Code No.U0431: ETACS Data Malfunction

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 ETACS-ECU via 
the CAN bus lines.

.

DIAGNOSTIC TROUBLE CODE SET 
CONDITIONS

The code is set when abnormality is detected in the 
signal received from ETACS-ECU.

.

PROBABLE CAUSES

• Malfunction of the CAN bus line

• Malfunction of ETACS-ECU power supply circuit 

system

• ETACS-ECU malfunction

• Malfunction of AWC-ECU

• Coding not implemented

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.
Use scan tool to perform the CAN bus diagnosis.
Q: Is the check result normal?

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

− 

Troubleshooting 

P.54C-17

).

STEP 2. M.U.T.-III diagnostic trouble code.
Check if the AWC diagnostic trouble code No.U1415 is set. 
(Refer to 

P.23C-27

).

Q: Is the diagnostic trouble code set?

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

STEP 3. M.U.T.-III diagnostic trouble code.
Check the ETACS diagnostic trouble code. (Refer to GROUP 
54A 

− Troubleshooting 

P.54A-732

).

Q: Is the diagnostic trouble code set?

YES : Perform the relevant troubleshooting.
NO :  Go to Step 4.

STEP 4. M.U.T.-III data list.
Check the ETACS data list below.(Refer to GROUP 54A 

− 

ETACS 

P.54A-776

).

• Item No.252: Ambient temperature sensor

• Item No.254: IG voltage

Q: Is the check result normal?

YES : Go to Step 5.
NO :  Replace the ETACS-ECU. (Refer to GROUP 54A 

− 

ETACS-ECU 

P.54A-825

). Then go to Step 5.