Mitsubishi Montero Sport (2004+). Manual — part 789

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS) <RWD>

35B-37

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Communication with Scan Tool is not Possible. (Communication with
ABS Only is not Possible.)

Data Link Connector Circuit

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS) <RWD>

35B-38

.

CIRCUIT OPERATION

• The diagnostic output is made from the

ABS-ECU (terminal 23) to the diagnostic output
terminal (terminal 7) of the data link connector.

• When the data link connector's diagnostic test

mode control terminal (terminal 1) is grounded,
the ABS-ECU (terminal 24) will go into diagnostic
mode.

.

TECHNICAL DESCRIPTION (COMMENT)
When communication with the scan tool is not possi-
ble, the cause is probably an open circuit in the
ABS-ECU power circuit or an open circuit in the diag-
nostic output circuit.

.

TROUBLESHOOTING HINTS (The most likely
causes for this case:)

• Blown fuse

• Damaged wiring harness or connector

• Malfunction of the hydraulic unit (integrated with

AS-ECU)

.

AC004837

CONNECTORS: A-85, A-86

AI

A-86 (GR)

A-85 (B)

AC004265

CONNECTOR: C-69

AJ

C-69 (B)

AC004261

CONNECTORS: C-10, C-11, C-17

AL

C-17

C-11

C-10

AC003457

D-13

D-08

CONNECTORS: D-08, D-13

AC

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS) <RWD>

35B-39

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

.

STEP 1. Measure the power supply circuit at ABS-ECU
connector A-85.

(1) Disconnect connector A-85 and measure at the harness

side.

(2) Start the engine.

(3) Measure the voltage between terminal 9 and ground.
Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Go to Step 3.
NO : Go to Step 2.

STEP 2. Check the harness wire between ignition switch
(IG2) and ABS-ECU connector A-85 (terminal No.9).

AC201944

CONNECTOR : A-85

A-85(B)

A-85 HARNESS
CONNECTOR:
COMPONENT SIDE

AD

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

2 1

18

10

3

4

20

21

13 12

19

11

6

7

24 23

14

15

8

9

25

26

17 16

22

5

AC202680AB

A-85 HARNESS CONNECTOR:
COMPONENT SIDE

AC201944

CONNECTOR : A-85

A-85(B)

A-85 HARNESS
CONNECTOR:
COMPONENT SIDE

AD

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

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS) <RWD>

35B-40

NOTE: After inspecting intermediate connectors C-17, C-11,
D-08, and D-13, inspect the wire. If intermediate connector
C-17, C-11, D-08, or D-13 is damaged, repair or replace it.
Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

If the connector has been repaired or replaced, go to Step 3.
Q: Is any harness wire between ignition switch (IG2) and

ABS-ECU connector A-85 (terminal No.9) damaged?
YES : Repair them and go to Step 5.
NO : Go to Step 3.

AC201960

CONNECTORS : C-11, C-17

C-17

C-11

C-17

AB

C-11

17

7

15

5

16

6

12 13

10

3

11

14

4

8

1

9

2

8

19

7

6

5

16

15

17 18

4

3

2

10 11 12 13

1
9

14

AC201961

CONNECTORS : D-08, D-13

D-08

D-08 HARNESS CONNECTOR:
COMPONENT SIDE

AB

D-13

M

3

1

4

2

9

20

8

19

7

18

6

1716 15

5

14

4

13

3

12

2

11

1

10

D-13 HARNESS CONNECTOR:
COMPONENT SIDE