Mitsubishi Lancer Evolution IX. Manual - part 604

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-99

Code No.65 ABS monitor system

OPERATION

The 4WD-ECU receives ABS operation condition 
from the ABS-ECU.

DIAGNOSIS CODE SET CONDITIONS

Code No.65 is set when ABS is detected to be oper-
ating for more than 1 minute continuously.

PROBABLE CAUSES

• Damaged harness wires and connectors

• Malfunction of the ABS-ECU

• Malfunction of the 4WD-ECU

DIAGNOSIS

STEP 1. M.U.T.-II/III data list
Item 61: ABS monitor

OK:

1. Disconnect ABS-ECU connector B-118: 

ON

2. Connect ABS-ECU connector B-118: OFF

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Cope with Intermittent 

Malfunction 

P.00-5

).

NO <When 1. is abnormal> : 

Go to Step 2.

NO <When 2. is abnormal> : 

Go to Step 4.

ABS monitor system circuit

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

ABS-ECU

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-100

STEP 2. Connectors check: B-118 ABS-ECU 
connector, C-26 4WD-ECU connector.

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the defective connector.

AC311020

Harness side

B-118 
(B)

AB

Connector: B-118

<LH drive vehicles>

<RH drive vehicles>

B-118 
(GR)

B-118

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>

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-101

STEP 3. Check the harness between ABS-ECU 
connector B-118 terminal No.3 and 4WD-ECU 
connector C-26 terminal No.48.

Check the output line for short circuit.

Q: Is the check result normal?

YES : 

Replace the ABS-ECU.

NO : 

Repair the wiring harness.

STEP 4. Measure the voltage at 4WD-ECU 
connector C-26.
(1) Measure the voltage between 4WD-ECU 

connector C-26 terminal No.38 and earth.

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

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 7.

AC311020

Harness side

B-118 
(B)

AB

Connector: B-118

<LH drive vehicles>

<RH drive vehicles>

B-118 
(GR)

B-118

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-26 (Y)

AC

Connector: C-26

4WD-ECU

C-26 (Y)

Rear console 
assembly

<LH drive vehicles>

<RH drive vehicles>

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-102

STEP 5. Connector check: C-26 4WD-ECU 
connector.

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

STEP 6. M.U.T.-II/III data list
Item 61: ABS monitor

OK:
Connect ABS-ECU connector B-118: OFF

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Cope with Intermittent 

Malfunction 

P.00-5

).

NO : 

Replace the 4WD-ECU.

STEP 7. Connectors check: B-118 ABS-ECU 
connector, C-26 4WD-ECU connector.

Check for the contact with terminals.

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>

AC311020

Harness side

B-118 
(B)

AB

Connector: B-118

<LH drive vehicles>

<RH drive vehicles>

B-118 
(GR)

B-118

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>