Mitsubishi Outlander GS45X. Manual - part 1723

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-197

Code No.C1624: AWC-ECU System (Internal Error)

.

OPERATION

AWC-ECU monitors the malfunction in the ECU.

.

DIAGNOSTIC TROUBLE CODE SET 
CONDITIONS

This diagnostic trouble code is set when 
RAM/ROM/EEPROM of AWC-ECU has a failure.

.

PROBABLE CAUSES

• Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Check whether the diagnostic trouble code is 
reset.
Q: Is diagnostic trouble code No.C1624 set?

YES : Replace the AWC-ECU. (Refer to 

P.23C-295

). Then 

go to Step 2.

NO :  Intermittent malfunction. (Refer to GROUP 00 

− How 

to Cope with Intermittent Malfunction 

P.00-15

).

STEP 2. Check whether the diagnostic trouble code is 
reset.
Q: Is diagnostic trouble code No.C1624 set?

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

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-198

Code No. C1626: Actuator Power Supply Voltage Malfunction

ELECTRONIC
CONTROL
COUPLING
SOLENOID
(CENTER)

AWC-ECU

Electronic control coupling solenoid system circuit

AC902486

ELECTRONIC
CONTROL
COUPLING
SOLENOID
(FRONT)

AB

AC901112

Connector: A-13

AH

AC901598

AD

Connector: B-28

B-28 (GR)

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-199

.

OPERATION

The AWC-ECU monitors the actuator power supply 
voltage.

.

DIAGNOSTIC TROUBLE CODE SET 
CONDITIONS

The AWC-ECU monitors the actuator power supply 
voltage of immediately after the ignition is turned ON 
and when the abnormality of the actuator power sup-
ply voltage is detected, this diagnostic trouble code is 
set.

.

PROBABLE CAUSES

• Malfunction of electronic control coupling sole-

noid (center)

• Malfunction of electronic control coupling sole-

noid (Front)

• Damaged harness wires and connectors

• Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

STEP 1. 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 2.
NO :  Repair the defective connector. Then go to Step 10.

STEP 2. 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 (for short to the 
power supply).
Q: Is the check result normal?

YES : Go to Step 3.
NO :  Repair the wiring harness. Then go to Step 10.

AC901075BM

Connector: C-42

AC901075BL

Connectors: C-138, C-139

C-139

C-138 (GR)

AC901080AQ

Connectors: D-113, D-138

D-113

D-138

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-200

STEP 3. 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 (for short to the power 
supply).
Q: Is the check result normal?

YES : Go to Step 4.
NO :  Repair the wiring harness. Then go to Step 10.

STEP 4. Check of the electronic control coupling solenoid 
(Front)
Refer to 

P.23C-277

.

Q: Is the check result normal?

YES : Go to Step 5.
NO :  Replace the transfer assembly (Refer to 

P.23C-292

). 

Then go to Step 10.

STEP 5. 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 6.
NO :  Repair the defective connector. Then go to Step 10.

STEP 6. 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 (for short to the 
power supply).
Q: Is the check result normal?

YES : Go to Step 7.
NO :  Repair the wiring harness. Then go to Step 10.

STEP 7. 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 (for short to the power 
supply).
Q: Is the check result normal?

YES : Go to Step 8.
NO :  Repair the wiring harness. Then go to Step 10.