Mitsubishi Outlander GS45X. Manual — part 1736

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-249

CAUTION

• If there is any problem in the CAN bus lines,

an incorrect trouble symptom may occur.
Prior to this diagnosis, always diagnose the
CAN bus lines.

• Whenever the ECU is replaced, ensure that

the CAN bus lines are normal.

SYMPTOMS

S-AWC control mode selector or AWC-ECU may
have a problem.

PROBABLE CAUSES

• S-AWC control mode selector malfunction

• Malfunction of the combination meter

• Damaged harness wires and connectors

• 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 3.
NO : Repair the CAN bus lines. (Refer to GROUP 54C

−

Troubleshooting

P.54C-17

). After repairing the CAN

bus line, go to Step 2.

STEP 2. Retest the system.
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 3.

STEP 3. M.U.T.-III actuator test.
Combination meter item No.2: LCD(AUTO) (Refer to GROUP
54A

− Combination Meter

P.54A-91

Q: Is the check result normal?

YES : Go to Step 4.
NO : Replace the combination meter. (Refer to GROUP

54A

− Combination Meter

P.54A-118

). Then go to

Step 13.

AC901075BL

Connectors: C-138, C-139

C-139

C-138 (GR)

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-250

STEP 4. S-AWC control mode selector inspection
Refer to

P.23C-296

Q: Is the check result normal?

YES : Go to Step 5.
NO : Replace the S-AWC control mode selector (Refer to

P.23C-295

). Then go to Step 13.

STEP 5. Measure the voltage at C-41 S-AWC control mode
selector connector.
(1) Disconnect the connector, and measure the voltage

between terminal No.1, No.3 and ground at the harness
side.

(2) Turn the ignition switch to the "ON" position.

OK: Battery positive voltage

Q: Is the check result normal?

YES : Go to Step 8.
NO : Go to Step 6.

STEP 6. S-AWC control mode selector connector,
intermediate connector, AWC-ECU connector check: C-41,
C-32, C-138, C-139
Q: Is the check result normal?

YES : Go to Step 7.
NO : Repair the defective connector. Then go to Step 13.

STEP 7. Check the wiring harness between C-41 S-AWC
control mode selector connector terminal No.1 and C-139
AWC-ECU connector terminal No.6, and between C-41
S-AWC control mode selector connector terminal No.3 and
C-139 AWC-ECU connector terminal No.7.
Check the output line for short or open circuit.
Q: Is the check result normal?

YES : Go to Step 11.
NO : Repair the wiring harness. Then go to Step 13.

STEP 8. Measure the resistance at C-41 S-AWC control
mode selector connector.
Disconnect the connector, and measure the resistance
between terminal No.2 and ground at the harness side.

OK: Continuity (Less than 2

Ω)

Q: Is the check result normal?

YES : Go to Step 11.
NO : Go to Step 9.

STEP 9. S-AWC control mode selector connector check:
C-41
Q: Is the check result normal?

YES : Go to Step 10.
NO : Repair the defective connector. Then go to Step 13.

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

TSB Revision

AUTOMATIC TRANSAXLE

23C-251

STEP 10. Check the wiring harness between C-41 S-AWC
control mode selector connector terminal No.2 and body
ground.
Check the ground line for open circuit.
Q: Is the check result normal?

YES : Go to Step 11.
NO : Repair the wiring harness. Then go to Step 13.

STEP 11. M.U.T.-III data list.
Check the following data list. (Refer to

P.23C-254

• Item 41: SW1 status (NORMAL)

• Item 42: SW2 status (OFF LOAD)

Q: Is the check result normal?

YES : Go to Step 13.
NO : Go to Step 12.

STEP 12. Retest the system.
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 AWC-ECU. (Refer to

P.23C-295

). Then

go to Step 13.

STEP 13. Retest the system.
Q: Is the check result normal?

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

INSPECTION PROCEDURE 4: The tight corner braking phenomenon (difficult to turn) appears
frequently with the S-AWC control mode selector in the NORMAL or SNOW mode

CAUTION

• If there is any problem in the CAN bus lines,

an incorrect trouble symptom may occur.
Prior to this diagnosis, always diagnose the
CAN bus lines.

• Whenever the ECU is replaced, ensure that

the CAN bus lines are normal.

SYMPTOMS

The electronic control coupling (Front), electronic
control coupling (center) or AWC-ECU may have a
problem.

PROBABLE CAUSES

• Malfunction of electronic control coupling (Front)

• Malfunction of electronic control coupling (center)

• Damaged harness wires and connectors

• Malfunction of AWC-ECU