Mitsubishi Montero (2002-2004). Manual - part 334

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-383

NOTE: Also check intermediate connector D-28, joint connec-
tor A-15, junction block connectors D-208 and D-210 for loose, 
corroded, or damaged terminals, or terminals pushed back in 
the connector. If intermediate connector D-28, joint connector 
A-15, junction block connectors D-208 or D-210 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 daytime running light-

ECU connector A-40 (terminal 2) and the ignition switch 
(IG2) 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 daytime 
running light function should now work normally.

AC204167

CONNECTOR : A-15

AD

14

13

4

1112

5

3

10

8 9

2

7

1

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

AC204191

CONNECTORS: D-208, D-210

D-208

AC

HARNESS SIDE

HARNESS SIDE

D-210

D-208

D-210

1

2

3

5

6

4

1

2

7 6

3

9

4

11

12

10

13

5

8

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-384

STEP 11. Check daytime running light-ECU connector A-40 
and headlight (RH) connector A-32 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are daytime running light-ECU connector A-40 and 

headlight (RH) connector A-32 in good condition?
YES : Go to Step 12.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. The daytime running light function should 

now work normally.

STEP 12. Check the wiring harness between daytime 
running light-ECU connector A-40 (terminal 3) and the 
headlight (RH) connector A-32 (terminal 1).
Q: Is the wiring harness between daytime running light-

ECU connector A-40 (terminal 3) and headlight (RH) 
connector A-32 (terminal 1) in good condition?
YES : Replace the daytime running light-ECU. The daytime 

running light function should now work 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 daytime 
running light function should now work normally.

AC204184

CONNECTORS : A-32, A-40

A-40(B)

A-32(B)

HARNESS SIDE

AC

A-32(B)

HARNESS SIDE

A-40(B)

1
4

2

3
6 5

2

1

Y

3

AC204184

CONNECTORS : A-32, A-40

A-40(B)

A-32(B)

HARNESS SIDE

AC

A-32(B)

HARNESS SIDE

A-40(B)

1
4

2

3
6 5

2

1

Y

3

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-385

INSPECTION PROCEDURE J-12: Headlight and Taillight: When the daytime running light function is 
operating, the headlights (low-beam) continue lighting in a reduced beam state even if the headlight 
switch turns on. <vehicles for Canada>

.

TECHNICAL DESCRIPTION (COMMENT) 
The front-ECU may be defective if the daytime run-
ning light function does not operate normally.

.

TROUBLESHOOTING HINT
The front-ECU may be defective

DIAGNOSIS

STEP 1. Check the headlight operation.
Q: Do the headlights illuminate?

YES : Go to Step 2.
NO :  Repair the headlights first (Refer to 

P.54Bb-313

).

 STEP 2. Replace the front-ECU.
Q:  Do the daytime running light function work normally?

YES : No action is necessary and testing is complete.
NO :  Refer to Inspection Procedure J-11 "Daytime running 

light function does not work normally 

P.54Bb-357

."

Daytime Running Light Circuit

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-386

INSPECTION PROCEDURE J-13: Headlight and Taillight: When the ignition switch is turned from on 
to off, the headlights darken significantly. <vehicles for Canada>

Daytime Running Light Power Supply Circuit

AC204183

CONNECTOR : A-07X

AG

AC204167

CONNECTOR : A-15

AM