Mitsubishi Montero (2002-2004). Manual - part 327

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-355

STEP 53. Check the wiring harness between side marker 
light (RH) connector G-09 (terminal 4) and ground.
Q: Is the wiring harness between side marker light (RH) 

connector G-09 (terminal 4) and ground in good 
condition?
YES : Replace the license plate light socket. Verify that the 

side marker light (RH) illuminates 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. Verify that 
the side marker light (RH) illuminates normally.

STEP 54. Check side marker 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 side marker light (RH) connector G-09 and front-

ECU connector A-07X in good condition?
YES : Go to Step 55.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the side marker light (RH) 

illuminates normally.

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

SWS SYMPTOM PROCEDURES

54Bb-356

STEP 55. Check the wiring harness between side marker 
light (RH) connector G-09 (terminal 1) and front-ECU 
connector A-07X (terminal 8).

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 side marker light (RH) 

connector G-09 (terminal 1) and front-ECU connector A-
07X (terminal 8) in good condition?
YES : Replace the license plate light socket. Verify that the 

side marker light (RH) illuminates 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. Verify that 
the side marker light (RH) illuminates normally.

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

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

AC

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

SWS SYMPTOM PROCEDURES

54Bb-357

Inspection Procedure J-7: Headlight and Taillight: One of the headlights does not illuminate.

Headlights Circuit

AC204183

CONNECTOR : A-07X

AG

AC204167

CONNECTORS : A-15, A-17, A-20

A-15

AP

A-17(GR)

A-20(B)

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-358

.

TECHNICAL DESCRIPTION (COMMENT) 
If one of the headlights does not illuminate, a head-
light bulb may be defective.

.

TROUBLESHOOTING HINTS

• The headlight bulb may be defective

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

.

DIAGNOSIS

Required Special Tool:

• MB991223: Test Harness Set 

STEP1. Check the headlight operation.
Q: Which of the headlights does not illuminate?

LH (low and high beam) : Go to Step 2.
RH (low and high beam) : Go to Step 5.
LH (only low beam) : Go to Step 8.
RH (only low beam) : Go to Step 11.
LH (only high beam) : Go to Step 14.
RH (only high beam) : Go to Step 17.
Low beam only (both RH and LH) : Refer to Inspection 

Procedure J-2 "headlights (low-beam) do not 
illuminate 

P.54Bb-308

."

High beam only (both RH and LH) : Refer to Inspection 

Procedure J-3 "headlights (high-beam) do not 
illuminate 

P.54Bb-313

."

STEP 2. Check headlight (LH) bulb.
(1) Remove the headlight (LH) bulb.
(2) Verify that the headlight (LH) bulb is not damaged or burned 

out.

Q: Is headlight (LH) bulb normal?

YES : Go to Step 3.
NO :  Replace the headlight (LH) bulb. Verify that the 

headlights illuminate normally.

AC204166

CONNECTOR : A-32

AM

A-32(B)