Mitsubishi Montero (2004+). Manual — part 810
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-497
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
. All the vehicle horn (including the theft-alarm
horn) should sound when the theft-alarm system is
triggered.
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.
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
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
SIMPLIFIED WIRING SYSTEM (SWS)
54B-498
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.
INSPECTION PROCEDURE N-3: Theft-alarm System: Headlights (high-beam) do not flash when the
theft-alarm system is triggered.
.
TECHNICAL DESCRIPTION (COMMENT)
If the headlights (high-beam) illuminate normally, the
front-ECU or the ETACS-ECU may be defective.
.
TROUBLESHOOTING HINTS
• The front-ECU may be defective
• The ETACS-ECU may be defective
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
DIAGNOSIS
STEP 1. Check the headlight (high-beam) operation.
Q: Do the headlights illuminate at high beam normally?
YES : Go to Step 2.
NO : Refer to Inspection Procedure J-3 "The headlights
(high-beam) does not illuminate normally
."
STEP 2. Replace the ECU.
(1) Replace the ETACS-ECU.
(2) The headlights should flash at high beam when the
theft-alarm system is triggered.
Q: Do the headlights flash at high beam when the
theft-alarm system is triggered?
YES : No action is necessary and testing is complete.
NO : Replace the front-ECU. The headlights should flash at
high-beam when the theft-alarm system is triggered.
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-499
INSPECTION PROCEDURE N-4: Theft-alarm System: Panic alarm function does not work.
.
TECHNICAL DESCRIPTION (COMMENT)
If the keyless entry system is normal, the
ETACS-ECU may be defective.
.
TROUBLESHOOTING HINTS
• The ETACS-ECU 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 Tools:
• MB991223: Harness Set
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B
STEP 1. Check the keyless entry system.
Q: Does the keyless entry system work normally?
YES : Go to Step 2.
NO : Refer to Inspection Procedure E-1 "Keyless entry
."
Panic Alarm Function
INPUT SIGNAL CHART
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-500
STEP 2. Check the input signal (by using the pulse check
mode of the monitor.)
Check the input signals from the transmitter "PANIC" switch:
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991502 to the data link connector
(16-pin).
(2) Operate scan tool MB991958 according to the procedure
below to display "PULSE CHECK."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "PULSE CHECK."
(3) Check that scan tool MB991958 sounds.
Q: Does scan tool MB991958 sound when the transmitter
"PANIC" switch is operated?
YES : Replace the ETACS-ECU. Verify that the panic alarm
works normally.
NO : Refer to Inspection Procedure P-10 "ETACS-ECU
does not receive any signal from lock, unlock, trunk or
panic switch
INPUT SIGNAL CHART
M1549024200062
<SWS monitor>
If a problem is found in the Service Data inspection,
observe the table below.
AC307591 AB
MB991911
DATA LINK
CONNECTOR
MB991824
MB991827
SYMPTOM
INSPECTION
PROCEDURE
REFERENCE
PAGE
ETACS-ECU does not receive any signal from the ignition switch (ACC).
O-1
ETACS-ECU does not receive any signal from the ignition switch (IG1).
O-2
ETACS-ECU does not receive any signal from the fog light switch.
O-3
ETACS-ECU does not receive "R" position signal from the transmission
range switch.
O-4
ETACS-ECU does not receive any signal from the driver's or the front
passenger's door switch.
O-5
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