Mitsubishi Montero (2002-2004). Manual — part 360

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-487

STEP 4. Check the fusible link (2) line of the power supply
circuit to the theft-alarm horn relay. Test at theft-alarm horn
relay connector A-11X.
(1) Disconnect theft-alarm horn relay connector A-11X and

measure the voltage available at the relay box side of the
connector.

(2) Measure the voltage between terminal 3 and ground, and

also between terminal 5 and ground.

• The voltage should be approximately 12 volts (battery

positive voltage).

Q: Is the measured voltage approximately 12 volts (battery

positive voltage)?
YES : Go to Step 7.
NO : Go to Step 5.

STEP 5. Check theft-alarm horn relay connector A-11X for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is theft-alarm horn relay connector A-11X in good

condition?
YES : Go to Step 6.
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.

AC204183

CONNECTOR : A-11X

RELAY BOX SIDE

AE

2 1

5

4

3

A-11X

1

2

3

4

5

ACX01571AC

CONNECTOR A-11X
(RELAY BOX SIDE)

AC204183

CONNECTOR : A-11X

RELAY BOX SIDE

AE

2 1

5

4

3

A-11X

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

54Bb-488

STEP 6. Check the wiring harness between theft-alarm
horn relay connector A-11X (terminals 3 and 5) and fusible
link (2).
Q: Is the wiring harness between theft-alarm horn relay

connector A-11X (terminals 3 and 5) and fusible link (2)
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 7. Check theft-alarm horn relay connector A-11X and
theft-alarm horn connector A-04 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are theft-alarm horn relay connector A-11X and theft-

alarm horn connector A-04 in good condition?
YES : Go to Step 8.
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.

AC204183

CONNECTOR : A-11X

RELAY BOX SIDE

AE

2 1

5

4

3

A-11X

AC204167

CONNECTOR : A-04

HARNESS
SIDE

A-04(B)

A-04(B)

AB

1

AC204183

CONNECTOR : A-11X

RELAY BOX SIDE

AE

2 1

5

4

3

A-11X

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

54Bb-489

STEP 8. Check the wiring harness between theft-alarm
horn relay connector A-11X (terminal 4) and theft-alarm
horn connector A-04 (terminal 1).
Q: Is the wiring harness between horn relay connector A-

11X (terminal 4) and theft-alarm horn connector A-04
(terminal 1) in good condition?
YES : Go to Step 9.
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 9. Check theft-alarm horn relay connector A-11X and
ETACS-ECU connector D-223 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are theft-alarm horn relay connector A-11X and ETACS-

ECU connector D-223 in good condition?
YES : Go to Step 10.
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-04

HARNESS
SIDE

A-04(B)

A-04(B)

AB

1

AC204183

CONNECTOR : A-11X

RELAY BOX SIDE

AE

2 1

5

4

3

A-11X

AC204183

CONNECTOR : A-11X

RELAY BOX SIDE

AE

2 1

5

4

3

A-11X

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

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SWS SYMPTOM PROCEDURES

54Bb-490

STEP 10. Check the wiring harness between theft-alarm
horn relay connector A-11X (terminal 1) and ETACS-ECU
connector D-223 (terminal 49).

NOTE: Also check intermediate connector D-27 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connectors D-27 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 theft-alarm horn relay

connector A-11X (terminal 1) and ETACS-ECU
connector D-223 (terminal 49) in good condition?
YES : Go to Step 11.
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 11. Check the fit of the theft-alarm horn.
NOTE: The theft-alarm horn is grounded to the vehicle body via
its mounting bolt.
Q: Is the theft-alarm 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 theft-alarm horn correctly. All the vehicle

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

AC204183

CONNECTOR : A-11X

RELAY BOX SIDE

AE

2 1

5

4

3

A-11X

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-27

AH

10

4

8

7

3

9

5

1

6

2