Mitsubishi Lancer Evolution IX. Manual - part 611

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-127

STEP 3. Check the harness between diagnosis 
connector C-14 (terminal No.1, 7) and 4WD-ECU 
connector C-26 (terminal No.46, 35).

Check the output line for short or open circuit.

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Cope with Intermittent 

Malfunction 

P.00-5

).

NO : 

Repair the wiring harness.

STEP 4. Measure the voltage at 4WD-ECU 
connector C-25.
(1) Turn the ignition switch to the ON position.

(2) Measure the voltage between 4WD-ECU 

connector C-25 terminal No.13 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 5.

AC311015AM

Connector: C-14 <LH drive vehicles>

C-14 (B)

C-14

AC311037

C-14 (B)

AE

Connector: C-14 <RH drive vehicles>

C-14

AC311002

4WD-ECU

Harness side

C-26 (Y)

AC

Connector: C-26

4WD-ECU

C-26 (Y)

Rear console 
assembly

<LH drive vehicles>

<RH drive vehicles>

AC311002

4WD-ECU

Harness side

C-25 (Y)

AB

Connector: C-25

4WD-ECU

C-25 (Y)

Rear console 
assembly

<LH drive vehicles>

<RH drive vehicles>

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-128

STEP 5. Connectors check: C-25 4WD-ECU 
connector, C-124 intermediate connector, C-210, 
C-211 J/B connector <LH drive vehicles> or C-25 
4WD-ECU connector, C-138 intermediate 
connector, C-211, C-214 J/B connector <RH drive 
vehicles>.

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

AC311002

4WD-ECU

Harness side

C-25 (Y)

AB

Connector: C-25

4WD-ECU

C-25 (Y)

Rear console 
assembly

<LH drive vehicles>

<RH drive vehicles>

AC311015AB

Connector: C-124 <LH drive vehicles>

C-124

AC311016AB

Connector: C-138 <RH drive vehicles>

C-138

AC310448

AX

Connector: C-210, C-211 <LH drive vehicles>

Junction block (front view)

C-211

C-210

C-211

C-210

AC310458

AS

Connector: C-211, 
C-214 <RH drive vehicles>

C-214

C-211

C-214

Junction block (front view)

C-211

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-129

STEP 6. Check the harness between 4WD-ECU 
connector C-25 terminal No.13 and ignition 
switch.

Check the power supply line for short or open circuit.

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Cope with Intermittent 

Malfunction 

P.00-5

).

NO : 

Repair the wiring harness.

STEP 7. Measure the resistance at 4WD-ECU 
connectors C-25, C-26.

•

Measure the resistance between 4WD-ECU connec-

tor C-25 terminal No.26 and earth.

• Measure the resistance between 4WD-ECU con-

nector C-26 terminal No.42 and earth.

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Go to Step 8.

AC311002

4WD-ECU

Harness side

C-25 (Y)

AB

Connector: C-25

4WD-ECU

C-25 (Y)

Rear console 
assembly

<LH drive vehicles>

<RH drive vehicles>

AC311002

4WD-ECU

Harness side

C-26 (Y)

AD

Connector: C-25, C-26

4WD-ECU

C-26 (Y)

Rear console 
assembly

<LH drive vehicles>

<RH drive vehicles>

Harness side

C-25 (Y)

C-25 (Y)

C-25

C-26

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-130

STEP 8. Connectors check: C-25, C-26 4WD-ECU 
connector.

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the defective connector.

STEP 9. Check the harness between 4WD-ECU 
connector C-25 terminal No.26, C-26 terminal 
No.42 and earth.

Check the earth line for open circuit.

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Cope with Intermittent 

Malfunction 

P.00-5

).

NO : 

Repair the wiring harness.

AC311002

4WD-ECU

Harness side

C-26 (Y)

AD

Connector: C-25, C-26

4WD-ECU

C-26 (Y)

Rear console 
assembly

<LH drive vehicles>

<RH drive vehicles>

Harness side

C-25 (Y)

C-25 (Y)

C-25

C-26

AC311002

4WD-ECU

Harness side

C-26 (Y)

AD

Connector: C-25, C-26

4WD-ECU

C-26 (Y)

Rear console 
assembly

<LH drive vehicles>

<RH drive vehicles>

Harness side

C-25 (Y)

C-25 (Y)

C-25

C-26