Mitsubishi Montero (2002-2004). Manual — part 362

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-495

STEP 19. Check the wiring harness between horn relay
connector A-10X (terminal 1) and ETACS-ECU connector
D-223 (terminal 42).

NOTE: Also check intermediate connector D-28 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connectors D-28 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 horn relay connector A-

10X (terminal 1) and ETACS-ECU connector D-223
(terminal 42) in good condition?
YES : Replace the ETACS-ECU. All the vehicle horn

(including the theft-alarm horn) should sound when
the theft-alarm system is triggered.

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. All the
vehicle horn (including the theft-alarm horn) should
sound when the theft-alarm system is triggered.

AC204183

CONNECTOR : A-10X

RELAY BOX SIDE

AD

2 1

5

4

3

AC204174

CONNECTOR : D-223

AC

D-223(B)

D-223(B)

HARNESS SIDE

42

43

50

51

45

46

53

54

52

44

48

5655

47

49

41

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

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

54Bb-496

STEP 20. Check the horn.
(1) When the theft-alarm system is triggered, remove the horn

(high or low) which does not sound.

(2) Connect the battery as shown, and Verify that the horn

sounds.

Q: Is the horn normal?

YES : Go to Step 21.
NO : Replace the defective horn. All the vehicle horn

(including the theft-alarm horn) should sound when
the theft-alarm system is triggered.

STEP 21. Check which horn is defective.
Q: Which horn does not sound?

horn (high) : Go to Step 22.
horn (low) : Go to Step 24.

STEP 22. Check joint connector (3) A-17 and horn (high)
connector A-27 for loose, corroded or damaged terminals,
or terminals pushed back in the connector.
Q: Are joint connector (3) A-17 and horn (high) connector

A-27 in good condition?
YES : Go to Step 23.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. All the vehicle horn (including the theft-alarm

horn) should sound when the theft-alarm system is
triggered.

ACX02352

AC204167

CONNECTOR : A-17

AF

A-17(GR)

A-17(GR)

14

13

4

1112

5

3

10

8 9

2

7

1

6

AC204166

CONNECTOR : A-27

HARNESS
SIDE

A-27(B)

A-27(B)

AB

1

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

54Bb-497

STEP 23. Check the wiring harness between joint
connector (3) A-17 (terminal 2) and horn (high) connector
A-27 (terminal 1).
Q: Is the wiring harness between joint connector (3) A-17

(terminal 2) and horn (high) connector A-27 (terminal 1)
in good condition?
YES : Go to Step 26.
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. All the
vehicle horn (including the theft-alarm horn) should
sound when the theft-alarm system is triggered.

STEP 24. Check joint connector (3) A-17 and horn (low)
connector A-28 for loose, corroded or damaged terminals,
or terminals pushed back in the connector.
Q: Are joint connector (3) A-17 and horn (low) connector A-

28 in good condition?
YES : Go to Step 25.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. All the vehicle horn (including the theft-alarm

horn) should sound when the theft-alarm system is
triggered.

AC204167

CONNECTOR : A-17

AF

A-17(GR)

A-17(GR)

14

13

4

1112

5

3

10

8 9

2

7

1

6

AC204166

CONNECTOR : A-27

HARNESS
SIDE

A-27(B)

A-27(B)

AB

1

AC204167

CONNECTOR : A-17

AF

A-17(GR)

A-17(GR)

14

13

4

1112

5

3

10

8 9

2

7

1

6

AC204166

CONNECTOR : A-28

HARNESS
SIDE

A-28(B)

A-28(B)

AC

1

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-498

STEP 25. Check the wiring harness between joint
connector (3) A-17 (terminal 3) and horn (low) connector A-
28 (terminal 1).
Q: Is the wiring harness between joint connector (3) A-17

(terminal 3) and horn (low) connector A-28 (terminal 1)
in good condition?
YES : Go to Step 26.
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. All the
vehicle horn (including the theft-alarm horn) should
sound when the theft-alarm system is triggered.

STEP 26. Check the fit of the horn.
When the theft-alarm system is triggered, check the fit of the
horn (high or low) which does not sound.
NOTE: The horn is grounded to the vehicle body via its mount-
ing bolt.
Q: Is the horn installed correctly?

YES : Replace the ETACS-ECU. All the vehicle horn

(including the theft-alarm horn) should sound when
the theft-alarm system is triggered.

NO : Install the horn correctly. All the vehicle horn

(including the theft-alarm horn) should sound when
the theft-alarm system is triggered.

AC204167

CONNECTOR : A-17

AF

A-17(GR)

A-17(GR)

14

13

4

1112

5

3

10

8 9

2

7

1

6

AC204166

CONNECTOR : A-28

HARNESS
SIDE

A-28(B)

A-28(B)

AC

1