Mitsubishi Outlander GS45X. Manual - part 1727

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-213

.

OPERATION

AWC-ECU power supply is provided from the battery 
via ETACS-ECU.

.

AC901112

Connector: A-13

AH

AC901598

AD

Connector: B-28

B-28 (GR)

AC901075BO

Connector: C-31

AC901075BM

Connector: C-42

AC901075BL

Connectors: C-138, C-139

C-139

C-138 (GR)

AC702828BI

Connectors: C-309, C-313, C-315, C-317

C-315

C-309 (B)

C-313 (BR)

C-317

AC901080AQ

Connectors: D-113, D-138

D-113

D-138

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

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AUTOMATIC TRANSAXLE

23C-214

DIAGNOSTIC TROUBLE CODE SET 
CONDITIONS

This diagnostic trouble code is set when the 
AWC-ECU power supply voltage and the actuator 
power supply voltage are less than 9 V.

.

PROBABLE CAUSES

• Battery failure

• Malfunction of charging system

• Malfunction of ETACS-ECU (power supply circuit 

system)

• Damaged harness wires and connectors

• Malfunction of electronic control coupling sole-

noid (Front)

• Malfunction of electronic control coupling sole-

noid (center)

• Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

STEP 1. 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 2.

STEP 2. Check the battery.
Refer to GROUP 54A 

− Battery Test 

P.54A-9

.

Q: Is the check result normal?

YES : Go to Step 4.
NO :  Charge or replace the battery. Then go to Step 3.

STEP 3. Check the charging system.
Refer to GROUP 16 

− Charging System 

P.16-8

.

Q: Is the check result normal?

YES : Go to Step 4.
NO :  Repair or replace the charging system component(s).

STEP 4. Voltage measurement at C-139 AWC-ECU 
connector
Disconnect the connector, and measure the voltage between 
terminal No.12 and ground at the wiring harness side.

OK: Battery positive voltage

Q: Is the check result normal?

YES : Go to Step 8.
NO :  Go to Step 5.

STEP 5. AWC-ECU connector, ETACS-ECU connector 
check: C-139, C-315, C-138, C-31
Q: Is the check result normal?

YES : Go to Step 6.
NO :  Repair the defective connector. Then go to Step 19.

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

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AUTOMATIC TRANSAXLE

23C-215

STEP 6. Check the wiring harness between C-139 
AWC-ECU connector terminal No.12 and C-315 
ETACS-ECU connector terminal No.4.
Check the power supply line for short or open circuit.
Q: Is the check result normal?

YES : Go to Step 7.
NO :  Check C-31, C-138 intermediate connector. When no 

problem is found, repair the wiring harness. Then go 
to Step 19.

STEP 7. M.U.T.-III data list.
Item No.31: Battery voltage (CAN input) (Refer to data list ref-
erence table 

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 ETACS-ECU. (Refer to GROUP 54A 

− 

ETACS-ECU 

P.54A-825

). Then go to Step 19.

STEP 8. AWC-ECU connector check: C-138, C-139
Q: Is the check result normal?

YES : Go to Step 9.
NO :  Repair the defective connector. Then go to Step 19.

STEP 9. Check the wiring harness between C-139 
AWC-ECU connector terminal No.13 and body ground.
Check the ground line for open circuit.
Q: Is the check result normal?

YES : Go to Step 10.
NO :  Repair the wiring harness. Then go to Step 19.

STEP 10. Electronic control coupling solenoid (front) 
connector, intermediate connector, AWC-ECU connector 
check: B-28, A-13, C-42, C-139
Q: Is the check result normal?

YES : Go to Step 11.
NO :  Repair the defective connector. Then go to Step 19.

STEP 11. Check the wiring harness between B-28 
electronic control coupling solenoid (front) connector 
terminal No.1 and C-139 AWC-ECU connector terminal 
No.1.
Check the power supply line for short circuit.
Q: Is the check result normal?

YES : Go to Step 12.
NO :  Repair the wiring harness. Then go to Step 19.

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

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AUTOMATIC TRANSAXLE

23C-216

STEP 12. Check the wiring harness between B-28 
electronic control coupling solenoid (front) connector 
terminal No.2 and C-139 AWC-ECU connector terminal 
No.14.
Check the ground line for short circuit.
Q: Is the check result normal?

YES : Go to Step 13.
NO :  Repair the wiring harness. Then go to Step 19.

STEP 13. Check of the electronic control coupling solenoid 
(Front)
Refer to 

P.23C-277

.

Q: Is the check result normal?

YES : Go to Step 14.
NO :  Replace the transfer assembly (Refer to 

P.23C-292

). 

Then go to Step 19.

STEP 14. Electronic control coupling solenoid (center) 
connector, intermediate connector, AWC-ECU connector 
check: D-138, C-138, D-113, C-139
Q: Is the check result normal?

YES : Go to Step 15.
NO :  Repair the defective connector. Then go to Step 19.

STEP 15. Check the wiring harness between D-138 
electronic control coupling solenoid (center) connector 
terminal No.2 and C-139 AWC-ECU connector terminal 
No.2.
Check the power supply line for short circuit.
Q: Is the check result normal?

YES : Go to Step 16.
NO :  Repair the wiring harness. Then go to Step 19.

STEP 16. Check the wiring harness between D-138 
electronic control coupling solenoid (center) connector 
terminal No.1 and C-139 AWC-ECU connector terminal 
No.3.
Check the ground line for short circuit.
Q: Is the check result normal?

YES : Go to Step 17.
NO :  Repair the wiring harness. Then go to Step 19.

STEP 17. Check of the electronic control coupling solenoid 
(center)
Refer to GROUP 27C 

− On-vehicle Service 

P.27C-94

.

Q: Is the check result normal?

YES : Go to Step 18.
NO :  Replace the electronic control coupling (center) 

(Refer to GROUP 27C 

− Electronic Control Coupling 

P.27C-97

). Then go to Step 19.