Mitsubishi Outlander GS45X. Manual - part 1734

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-241

INSPECTION PROCEDURE 2 : Malfunction of power supply circuit system 

AC902491

Power supply system circuit

ETACS-
ECU

FUSIBLE 
LINK

34

IGNITION 
SWITCH (IG1)

IG1 
RELAY

AWC-ECU

POWER 
SUPPLY

ELECTRONIC
CONTROL
COUPLING
SOLENOID
(CENTER)

ELECTRONIC
CONTROL
COUPLING
SOLENOID
(FRONT)

AB

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-242

.

COMMENTS ON TROUBLE SYMPTOM

AWC-ECU power supply circuit, ground circuit, or 
AWC-ECU may have a problem.

.

PROBABLE CAUSES

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

• Malfunction of AWC-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)>

TSB Revision

AUTOMATIC TRANSAXLE

23C-243

DIAGNOSTIC PROCEDURE

STEP 1. Check the fuse No.12, No.17
Visually check for open circuit in the fuse No.12, No.17.
Q: Is the check result normal?

YES : Go to Step 14.
NO :  Go to Step 2.

STEP 2. 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 3.
NO :  Repair the defective connector. Then go to Step 26.

STEP 3. 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 4.
NO :  Repair the wiring harness. Then go to Step 26.

STEP 4. 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 5.
NO :  Repair the wiring harness. Then go to Step 26.

STEP 5. Check of the electronic control coupling solenoid 
(Front)
Refer to 

P.23C-277

.

Q: Is the check result normal?

YES : Go to Step 6.
NO :  Replace the transfer assembly (Refer to 

P.23C-292

). 

Then go to Step 26.

STEP 6. 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 7.
NO :  Repair the defective connector. Then go to Step 26.

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-244

STEP 7. 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 8.
NO :  Repair the wiring harness. Then go to Step 26.

STEP 8. 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 9.
NO :  Repair the wiring harness. Then go to Step 26.

STEP 9. 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 10.
NO :  Replace the electronic control coupling (center) 

(Refer to GROUP 27C 

− Electronic Control Coupling 

P.27C-97

). Then go to Step 26.

STEP 10. Intermediate connector, AWC-ECU connector, 
ETACS-ECU connector check: C-31, C-138, C-139, C-315
Q: Is the check result normal?

YES : Go to Step 11.
NO :  Repair the defective connector. Then go to Step 26.

STEP 11. 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 circuit.
Q: Is the check result normal?

YES : Go to Step 12.
NO :  Repair the wiring harness, and then replace the fuse 

No.17. Then go to Step 26   .

STEP 12. Intermediate connector, AWC-ECU connector, 
ETACS-ECU connector check: C-138, C-139, C-313
Q: Is the check result normal?

YES : Go to Step 13.
NO :  Repair the defective connector. Then go to Step 26.