Mitsubishi Montero (2004+). Manual - part 697

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-45

NOTE: Also check intermediate connector D-28 and junction 
block connector D-221 for loose, corroded, or damaged termi-
nals, or terminals pushed back in the connector. If intermediate 
connector D-28 or junction block connector D-221 is damaged, 
repair or replace the damaged component(s) as described in 
GROUP 00E, Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between ETACS-ECU connector 

D-222 (terminal 6) and the battery in good condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. The system 
should communicate with the ETACS-ECU normally.

STEP 4. Check the ground circuit to the ETACS-ECU. Test 
at ETACS-ECU connector D-222.

(1) Disconnect ETACS-ECU connector D-222 and measure the 

resistance available at the junction block side of the 
connector.

(2) Measure the resistance value between terminal 20 and 

ground.

• The resistance should equal 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 7.
NO :  Go to Step 5.

AC204170

CONNECTOR : D-28

AI

2 3

27

32

28

33

16

15

4 5

19

18

29

17

34

7 8

35

22

21

9 10

30

36

31

37

25

24

23

6

20

1

14

26

11

13

12

38

AC204173

CONNECTOR : D-221

AJ

HARNESS SIDE

3

1

4

6 5

7

8

2

AC204174

CONNECTOR : D-222

AB

1

2

3

5

6

4

9 8

121110

13

15 14

16

17

7

19

20

18

JUNCTION BLOCK SIDE

D-222

ACX01569

19

20

1817 1615 141312 1110 9 8 7

6 5 4 3 2 1

AB

CONNECTOR D-222
(JUNCTION BLOCK SIDE)

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-46

STEP 5. Check ETACS-ECU D-224 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Is ETACS-ECU connectors D-224 in good condition?

YES : Go to Step 6.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. The system should communicate with the 

ETACS-ECU normally.

STEP 6. Check the wiring harness between ETACS-ECU 
connector D-222 (terminal 20) and C-224 (terminal 23) and 
the ground.

AC204174

CONNECTOR : D-224

AD

D-224(B)

D-224(B)

HARNESS SIDE

21

23

24

22

32

3433

31

26

27

28

3029

38

39

40

36

37

25

35

AC204192

CONNECTORS : D-222, D-224

D-222

AC

HARNESS SIDE

D-224(B)

D-222

D-224(B)

1

2

3

5

6

4

9 8

121110

13

15 14

16

17

7

19

20

18

JUNCTION BLOCK SIDE

21

23

24

22

32

3433

31

26

27

28

3029

38

39

40

36

37

25

35

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-47

NOTE: Also check junction block connector D-209 for loose, 
corroded, or damaged terminals, or terminals pushed back in 
the connector. If junction block connector D-209 is damaged, 
repair or replace the damaged component(s) as described in 
GROUP 00E, Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between ETACS-ECU connector 

D-222 (terminal 20) and D-224 (terminal 23) and the 
ground in good condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. The system 
should communicate with the ETACS-ECU normally.

STEP 7. Check column switch connector D-203 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.

Q: Is column switch connector D-203 in good condition?

YES : Go to Step 8.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. The system should communicate with the 

ETACS-ECU normally.

AC204173

CONNECTOR : D-209

AD

HARNESS SIDE

1

2

6

7

9

3

4

11

12

10

5

13

8

D-209

AC204172

CONNECTOR : D-203

AC

HARNESS SIDE

1

2

3

7

8

6

5

10

4

9

D-203

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-48

STEP 8. Check the wiring harness between column switch 
connector D-203 (terminals 2 and 3) and ETACS-ECU 
connector D-224 (terminals 31 and 21).
Q: Is the wiring harness between column switch connector 

D-203 (terminals 2 and 3) and ETACS-ECU connector 
D-224 (terminals 31 and 21) in good condition?
YES : Replace the ETACS-ECU. The system should 

communicate with the ETACS-ECU normally.

NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. The system 
should communicate with the ETACS-ECU normally.

INSPECTION PROCEDURE A-4: Communication with the front-ECU is not possible.

NOTE: This troubleshooting procedure requires the 
use of scan tool MB991958 and SWS monitor kit 
MB991862. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor

P.54B-10

."

AC204172

CONNECTOR : D-203

AC

HARNESS SIDE

1

2

3

7

8

6

5

10

4

9

D-203

AC204174

CONNECTOR : D-224

AD

D-224(B)

D-224(B)

HARNESS SIDE

21

23

24

22

32

3433

31

26

27

28

3029

38

39

40

36

37

25

35