Mitsubishi Montero (2004+). Manual — part 809
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-493
STEP 16. Check horn relay connector A-10X and joint
connector (3) A-17 for loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Q: Is horn relay connector A-10X and joint connector (3)
A-17 in good condition?
YES : Go to Step 17.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. All the vehicle horn (including the theft-alarm
horn) should sound when the theft-alarm system is
triggered.
STEP 17. Check the wiring harnesses among horn relay
connector A-10X (terminal 4) and joint connector (3) A-17
(terminal 1).
Q: Are the wiring harnesses among horn relay connector
A-10X (terminal 4) and joint connector (3) A-17 (terminal
1) in good condition?
YES : Go to Step 18.
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
AC204167
CONNECTOR : A-17
AF
A-17(GR)
A-17(GR)
14
13
4
1112
5
3
10
8 9
2
7
1
6
AC204183
CONNECTOR : A-10X
RELAY BOX SIDE
AD
2 1
5
4
3
AC204167
CONNECTOR : A-17
AF
A-17(GR)
A-17(GR)
14
13
4
1112
5
3
10
8 9
2
7
1
6
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-494
STEP 18. Check ETACS-ECU connector D-223 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector D-223 in good condition?
YES : Go to Step 19.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. All the vehicle horn (including the theft-alarm
horn) should sound when the theft-alarm system is
triggered.
STEP 19. Check the wiring harness between horn relay
connector A-10X (terminal 1) and ETACS-ECU connector
D-223 (terminal 42).
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
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
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-495
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
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.
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.
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
ACX02352
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-496
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
. All the vehicle horn (including the theft-alarm
horn) should sound when the theft-alarm system is
triggered.
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.
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-27
HARNESS
SIDE
A-27(B)
A-27(B)
AB
1
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