Mitsubishi Lancer Evolution IX. Manual - part 601

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-87

STEP 11. Check the harness between stop lamp 
switch connector C-102 terminal No.1 and 
4WD-ECU connector C-26 terminal No.38.

Check the output line for short or open circuit.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the wiring harness.

STEP 12. Connector check: C-129 intermediate 
connector

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Repair the defective connector.

STEP 13. Check the harness between stop lamp 
switch connector C-102 terminal No.2 and 
battery.

Check the power supply line for short or open circuit.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the wiring harness.

AC309520

Connector: C-102

Harness side

Brake pedal

AC

4

3

2

1

C-102

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>

AC311015AH

Connector: C-129 <LH drive vehicles>

C-129

AC311016AG

Connector: C-129 <RH drive vehicles>

C-129

AC309520

Connector: C-102

Harness side

Brake pedal

AC

4

3

2

1

C-102

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-88

Code No.62 ACD mode changeover switch system

ACD mode changeover switch system circuit <LH drive vehicles>

IGNITION
SWITCH(IG1)

ACD MODE
CHANGEOVER
SWITCH

4WD-ECU

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Gray     R : Red     P : Pink     V : Violet

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-89

OPERATION

The 4WD-ECU receives a control mode (tarmac, 
gravel, snow) from the ACD mode changeover 
switch.

DIAGNOSIS CODE SET CONDITIONS

Code No.62 is set when the ACD mode changeover 
switch is ON for more than 60 seconds.

PROBABLE CAUSES

• Malfunction of the ACD mode changeover switch

• Damaged harness wires and connectors

• Malfunction of the 4WD-ECU

DIAGNOSIS

STEP 1. M.U.T.-II/III data list
Item 63: ACD mode changeover switch (Refer to 
data list reference table 

P.22A-142

).

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Cope with Intermittent 

Malfunction 

P.00-5

).

NO : 

Go to Step 2.

STEP 2. Check the ACD mode changeover 
switch.
Refer to 

P.22A-169

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the ACD mode changeover switch.

ACD mode changeover switch system circuit <RH drive vehicles>

IGNITION
SWITCH(IG1)

ACD MODE
CHANGEOVER
SWITCH

4WD-ECU

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Gray     R : Red     P : Pink     V : Violet

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-90

STEP 3. Measure the voltage at ACD mode 
changeover switch connector C-135.

(1) Disconnect the ACD mode changeover switch 

connector, and measure the voltage between 
terminal No.2 and earth.

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

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 4.

STEP 4. Connectors check: C-23 J/C (4), C-135 
ACD mode changeover switch connector, C-211, 
C-214 J/B connector <LH drive vehicles> or 
C-135 ACD mode changeover switch connector, 
C-210, C-211 J/B connector <RH drive vehicles>.

AC311015AI

Connector: C-135 <LH drive vehicles>

C-135

AC311037

C-135

AD

Connector: C-135 <RH drive vehicles>

AC311015AK

Connector: C-23 <LH drive vehicles>

C-23 (B)

AC311015AI

Connector: C-135 <LH drive vehicles>

C-135

AC311037

C-135

AD

Connector: C-135 <RH drive vehicles>

AC310448

AW

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

Junction block (front view)

C-214

C-211

C-211

C-214