Mitsubishi Montero Sport (2004+). Manual - part 815

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS) <4WD>

35C-67

STEP 2. Check harness connectors A-35, C-05 and C-17 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.

Refer to GROUP 00E, Harness Connector Inspection 

P.00E-2

. 

Q: Are the connectors and terminals in good condition?

YES : Go to Step 3.
NO :  Repair it and then go to Step 7.

AC201944

CONNECTOR : A-35

A-35(B)

A-35 HARNESS 
CONNECTOR:
COMPONENT SIDE

AC

1

3

2

4

AC201948

CONNECTOR : C-05

AC

3 2 1

4

5

7 6

8

9

11

12

10

13

14

C-05 HARNESS CONNECTOR:
COMPONENT SIDE

C-05

AC201950

CONNECTOR : C-17

C-17

AB

17

7

15

5

16

6

12 13

10

3

11

14

4

8

1

9

2

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS) <4WD>

35C-68

STEP 3. Check the harness wire between ABS relay 
connector A-35 (terminal No. 3) and combination meter 
connector C-05 (terminal No.10).

Q: Is the harness wire between ABS relay connector A-35 

(terminal No. 3) and combination meter connector C-05 
(terminal No.10) damaged?
YES : Repair it and then go to Step 7.
NO :  Replace the combination meter (printed circuit board) 

and then go to Step 7.

STEP 4. Check the ABS relay.

(1) Remove the ABS relay.
(2) Check for continuity between terminals 3 

− 4 when battery 

voltage is applied between terminals 1 

− 2.

Q: Is the ABS relay in good condition?

YES : Go to Step 5.
NO :  Replace the ABS relay. Then go to Step 7.

AC201944

CONNECTOR : A-35

A-35(B)

A-35 HARNESS 
CONNECTOR:
COMPONENT SIDE

AC

1

3

2

4

AC201948

CONNECTOR : C-05

AC

3 2 1

4

5

7 6

8

9

11

12

10

13

14

C-05 HARNESS CONNECTOR:
COMPONENT SIDE

C-05

BATTERY 
VOLTAGE

TESTER 
CONNECTION

SPECIFIED 
CONDITION

Not applied

3 

− 4

Less than 2 ohms

• Connect 

terminal 2 to the 
positive battery 
terminal

• Connect 

terminal 1 to the 
negative battery 
terminal

3 

− 4

Open circuit

AC004866

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS) <4WD>

35C-69

STEP 5. Check ABS relay connector A-35 and ABS-ECU 
connector A-85 for loose, corroded or damaged terminals, 
or terminals pushed back in the connector.

Refer to GROUP 00E, Harness Connector Inspection 

P.00E-2

. 

Q: Are the connectors and terminals in good condition?

YES : Go to Step 6.
NO :  Repair or replace it. Then go to Step 7.

STEP 6. Check the harness wire between ABS relay 
connector A-35 (terminal No.1) and ABS-ECU connector 
A-85 (terminal No.16).

Q: Is the harness wire between ABS relay connector A-35 

(terminal No.1) and ABS-ECU connector A-85 (terminal 
No.16) damaged?
YES : Repair it and then go to Step 7.
NO :  Replace the hydraulic unit (integrated with ABS-ECU) 

and then go to Step 7.

AC201955

A-85(B)

A-35(B)

CONNECTORS :A-35, A-85

AC

A-85 HARNESS CONNECTOR:
COMPONENT SIDE

18

12 11

20 19

10

3 2 1

13

14

22

23

17 16

25 24

15

8 7 6 5 4

21

9

26

A-35 HARNESS CONNECTOR:
COMPONENT SIDE

1

3

2

4

AC201955

A-85(B)

A-35(B)

CONNECTORS :A-35, A-85

AC

A-85 HARNESS CONNECTOR:
COMPONENT SIDE

18

12 11

20 19

10

3 2 1

13

14

22

23

17 16

25 24

15

8 7 6 5 4

21

9

26

A-35 HARNESS CONNECTOR:
COMPONENT SIDE

1

3

2

4

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS) <4WD>

35C-70

STEP 7. Retest the system.
Q: Does the ABS warning light turn off 3 seconds after 

start-up?
YES : The procedure is complete.
NO :  Return to Step 1.

INSPECTION PROCEDURE 4: Brake Operation is Abnormal.

.

TECHNICAL DESCRIPTION (COMMENT)
The cause depends on driving and road surface con-
ditions, so diagnosis may be difficult. However, if no 
diagnostic trouble code is displayed, carry out the fol-
lowing inspection.

.

TROUBLESHOOTING HINTS
The most likely cause for this condition:

• Malfunction of the hydraulic unit

.

DIAGNOSIS

Check the hydraulic unit.

• Refer to 

P.35C-76

. If the hydraulic unit is malfunctioning, 

replace it. Then check that the malfunction symptom is elim-
inated.