Mitsubishi Montero (2004+). Manual — part 765

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-317

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Verify the operation of each light.
Q: Which light does not illuminate?

Taillight (LH), license plate light and side marker light
(LH) : Go to Step 2.
Taillight (RH) and side marker light (RH) : Go to Step 4.
Taillight (LH) and license plate : Go to Step 6.
Position light : Go to Step 8.
Position light (LH) : Go to Step 11.
Position light (RH) : Go to Step 17.
Taillights : Go to Step 23.
Taillight (LH) : Go to Step 26.
Taillight (RH) : Go to Step 32.
License plate lights : Go to Step 38.
Side marker light (LH) : Go to Step 44.
Side marker light (RH) : Go to Step 50.
All lights : Refer to Inspection Procedure J-1 "Tail lights do

not illuminate

P.54B-299

."

STEP 2. Check rear combination light (LH) connector G-02
and front-ECU connector A-07X for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are rear combination light (LH) connector G-02 and

front-ECU connector A-07X in good condition?
YES : Go to Step 3.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. Verify that the taillight (LH), license plate

light and side marker light (LH) illuminates normally.

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204179

CONNECTOR : G-02

AB

HARNESS SIDE

G-02(B)

G-02(B)

1

4

2

3

5

6

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-318

STEP 3. Check the wiring harness between rear
combination light (LH) connector G-02 (terminal 1) and
front-ECU connector A-07X (terminal 8).

NOTE: Also check intermediate connectors D-28 and D-125 for
loose, corroded, or damaged terminals, or terminals pushed
back in the connector. If intermediate connector D-28 or D-125
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 rear combination light

(LH) connector G-02 (terminal 1) and front-ECU
connector A-07X (terminal 8) 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. Verify that
the taillight (LH), license plate light and side marker
light (LH) illuminates normally.

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204179

CONNECTOR : G-02

AB

HARNESS SIDE

G-02(B)

G-02(B)

1

4

2

3

5

6

AC204188

CONNECTORS : D-28, D-125

AP

D-28

D-28

D-125

D-125

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

9

8

6 7

5

3 4

20

32

21

33

43

17 18

30

41

16

29

28

39 40

13

25

12

24

35 36

14

26

37

15

27

38

19

31

42

1

10

22

2

11

23

34

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-319

STEP 4. Check rear combination light (RH) connector G-09
and front-ECU connector A-07X for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are rear combination light (RH) connector G-09 and

front-ECU connector A-07X in good condition?
YES : Go to Step 5.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. Verify that the taillight (RH) and side marker

light (RH) illuminates normally.

STEP 5. Check the wiring harness between rear
combination light (RH) connector G-09 (terminal 1) and
front-ECU connector A-07X (terminal 8).

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204179

CONNECTOR : G-09

AC

HARNESS SIDE

G-09(B)

G-09(B)

1

4

2

3

5

6

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204179

CONNECTOR : G-09

AC

HARNESS SIDE

G-09(B)

G-09(B)

1

4

2

3

5

6

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-320

NOTE: Also check intermediate connectors D-28 and D-111 for
loose, corroded, or damaged terminals, or terminals pushed
back in the connector. If intermediate connector D-28 or D-111
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 rear combination light

(RH) connector G-09 (terminal 1) and front-ECU
connector A-07X (terminal 8) 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. Verify that
the taillight (RH) and side marker light (RH)
illuminates normally.

STEP 6. Check taillight (LH) connector G-16 and front-ECU
connector A-07X for loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Q: Are taillight (LH) connector G-16 and front-ECU

connector A-07X in good condition?
YES : Go to Step 7.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. Verify that the taillight (RH) and side marker

light (RH) illuminates normally.

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

AC204171

CONNECTOR : D-111

BH

9

8

6 7

5

3 4

20

32

21

33

43

17 18

30

41

16

29

28

39 40

13

25

12

24

35 36

14

26

37

15

27

38

19

31

42

1

10

22

2

11

23

34

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204179

CONNECTOR : G-16

AH

HARNESS SIDE

G-16(B)

G-16(B)

3

4

2

1