Mitsubishi Outlander GS45X. Manual - part 1722

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-193

Code No.C161F: AWC actuator protection 1

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

The AWC-ECU calculates the electronic control cou-
pling (front) temperature by the information of the 
electronic control coupling (front) control amount, 
outside temperate, etc. If it is detected that the elec-
tronic control coupling (Front) temperature becomes 
extremely high, the high fluid temperature warning is 
displayed on the warning indicator.

.

DIAGNOSTIC TROUBLE CODE SET 
CONDITIONS

This diagnostic trouble code is set when the control 
is suspended to protect the electronic control cou-
pling (front).

.

PROBABLE CAUSES

• Electronic control coupling (front) protection con-

trol status

• Severe driving

• Electronic control coupling (front) failure (clutch 

slippage, etc.)

• Outside temperature signal failure

• Wheel speed signal failure

• Engine-related failure (engine speed signal fail-

ure)

• Ignition off time signal failure

DIAGNOSTIC PROCEDURE

STEP 1. Check whether the diagnostic trouble code is 
reset.
(1) To release the electronic control coupling (front) protection 

control, leave the vehicle for 15 minutes or longer after the 
high fluid temperature warning on the warning indicator 
disappears.

(2) Erase the diagnostic trouble code.
(3) Carry out the test drive.

NOTE: Do not carry out the severe test drive.

(4) Check if the diagnostic trouble code is set.
Q: Is diagnostic trouble code No.C161F set?

YES : Go to Step 2.
NO :  This diagnosis is complete.

STEP 2. 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 4.
NO :  Repair the CAN bus lines. (Refer to GROUP 54C 

− 

Troubleshooting 

P.54C-17

). After repairing the CAN 

bus line, go to Step 3.

STEP 3. Check whether the diagnostic trouble code is 
reset.
Q: Is diagnostic trouble code No.C161F set?

YES : Go to Step 4.
NO :  This diagnosis is complete.

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-194

STEP 4. M.U.T.-III data list
Item 12: Engine speed (Refer to 

P.23C-254

).

Q: Is the check result normal?

YES : Go to Step 5.
NO :  Perform the troubleshooting for the engine control 

system. (Refer to GROUP 13B 

− Troubleshooting 

P.13B-50

).

STEP 5. M.U.T.-III data list
Check the following data list. (Refer to 

P.23C-254

).

• Item No.21: Wheel speed sensor <FL>

• Item No.22: Wheel speed sensor <FR>

• Item No.23: Wheel speed sensor <RL>

• Item No.24: Wheel speed sensor <RR>

Q: Is the check result normal?

YES : Go to Step 6.
NO :  Perform the troubleshooting for the ASC. (Refer to 

GROUP 35C 

− Troubleshooting 

P.35C-18

).

STEP 6. M.U.T.-III data list
Check the following data list. (Refer to 

P.23C-254

).

• Item No.34: Ambient temperature (CAN input)

• Item No.35: Ignition off time (CAN input)

Q: Is the check result normal?

YES : Go to Step 7.
NO :  Perform the troubleshooting for the ETACS. (Refer to 

GROUP 54A 

− ETACS, Troubleshooting 

P.54A-732

).

STEP 7. Check of the electronic control coupling (Front)
Refer to 

P.23C-272

.

Q: Is the check result normal?

YES : Go to Step 8.
NO :  Replace the transfer assembly (Refer to 

P.23C-292

).

STEP 8. Check whether the diagnostic trouble code is 
reset.
(1) To release the electronic control coupling (front) protection 

control, leave the vehicle for 15 minutes or longer after the 
high fluid temperature warning on the warning indicator 
disappears.

(2) Erase the diagnostic trouble code.
(3) Carry out the test drive.

NOTE: Do not carry out the severe test drive.

(4) Check if the diagnostic trouble code is set.
Q: Is diagnostic trouble code No.C161F set?

YES : Replace the AWC-ECU. (Refer to 

P.23C-295

). 

NO :  Intermittent malfunction. (Refer to GROUP 00 

− How 

to Cope with Intermittent Malfunction 

P.00-15

).

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-195

Code No.C1621: AWC actuator protection 2

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

The AWC-ECU calculates the electronic control cou-
pling (center) temperature by the information of the 
electronic control coupling (center) control amount, 
outside temperate, etc. If it is detected that the elec-
tronic control coupling (center) temperature becomes 
extremely high, the high fluid temperature warning is 
displayed on the warning indicator.

.

DIAGNOSTIC TROUBLE CODE SET 
CONDITIONS

This diagnostic trouble code is set when the control 
is suspended to protect the electronic control cou-
pling (center).

.

PROBABLE CAUSES

• Electronic control coupling (center) protection 

control status

• Severe driving

• Electronic control coupling (center) failure (clutch 

slippage, etc.)

• Outside temperature signal failure

• Wheel speed signal failure

• Engine-related failure (engine speed signal fail-

ure)

• Ignition off time signal failure

DIAGNOSTIC PROCEDURE

STEP 1. Check whether the diagnostic trouble code is 
reset.
(1) To release the electronic control coupling (center) protection 

control, leave the vehicle for 15 minutes or longer after the 
high fluid temperature warning on the warning indicator 
disappears.

(2) Erase the diagnostic trouble code.
(3) Carry out the test drive.

NOTE: Do not carry out the severe test drive.

(4) Check if the diagnostic trouble code is set.
Q: Is diagnostic trouble code No.C1621 set?

YES : Go to Step 2.
NO :  This diagnosis is complete.

STEP 2. 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 4.
NO :  Repair the CAN bus lines. (Refer to GROUP 54C 

− 

Troubleshooting 

P.54C-17

). After repairing the CAN 

bus line, go to Step 3.

STEP 3. Check whether the diagnostic trouble code is 
reset.
Q: Is diagnostic trouble code No.C1621 set?

YES : Go to Step 4.
NO :  This diagnosis is complete.

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-196

STEP 4. M.U.T.-III data list
Item 12: Engine speed (Refer to 

P.23C-254

).

Q: Is the check result normal?

YES : Go to Step 5.
NO :  Perform the troubleshooting for the engine. (Refer to 

GROUP 13B 

− Troubleshooting 

P.13B-50

).

STEP 5. M.U.T.-III data list
Check the following data list. (Refer to 

P.23C-254

).

• Item No.21: Wheel speed sensor <FL>

• Item No.22: Wheel speed sensor <FR>

• Item No.23: Wheel speed sensor <RL>

• Item No.24: Wheel speed sensor <RR>

Q: Is the check result normal?

YES : Go to Step 6.
NO :  Perform the troubleshooting for the ASC. (Refer to 

GROUP 35C 

− Troubleshooting 

P.35C-18

).

STEP 6. M.U.T.-III data list
Check the following data list. (Refer to 

P.23C-254

).

• Item No.34: Ambient temperature (CAN input)

• Item No.35: Ignition off time (CAN input)

Q: Is the check result normal?

YES : Go to Step 7.
NO :  Perform the troubleshooting for the ETACS. (Refer to 

GROUP 54A 

− ETACS, Troubleshooting 

P.54A-732

).

STEP 7. Check of the electronic control coupling (center)
Refer to GROUP 27C 

− On-vehicle Service 

P.27C-94

.

Q: Is the check result normal?

YES : Go to Step 8.
NO :  Replace the electronic control coupling (center). 

(Refer to GROUP 27C 

− Electronic Control Coupling 

P.27C-97

).

STEP 8. Check whether the diagnostic trouble code is 
reset.
(1) To release the electronic control coupling (center) protection 

control, leave the vehicle for 15 minutes or longer after the 
high fluid temperature warning on the warning indicator 
disappears.

(2) Erase the diagnostic trouble code.
(3) Carry out the test drive.

NOTE: Do not carry out the severe test drive.

(4) Check if the diagnostic trouble code is set.
Q: Is diagnostic trouble code No.C161F set?

YES : Replace the AWC-ECU. (Refer to 

P.23C-295

). 

NO :  Intermittent malfunction. (Refer to GROUP 00 

− How 

to Cope with Intermittent Malfunction 

P.00-15

).