Mitsubishi Montero (2002-2004). Manual — part 357
SYMPTOM PROCEDURES
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SWS SYMPTOM PROCEDURES
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INSPECTION PROCEDURE N-1: Theft-alarm System: Theft-alarm system is not armed (theft-alarm
indicator light does not illuminate).
NOTE: This troubleshooting procedure requires the
use of scan tool MB991502 and SWS monitor kit
MB991862. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor
Theft-alarm Indicator Light Drive Circuit
ACX02274
FUSIBLE LINK (1)
AE
BATTERY
AC204170
CONNECTORS : D-02, D-28, D-105
BJ
D-28
D-105(B)
D-02
SYMPTOM PROCEDURES
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SWS SYMPTOM PROCEDURES
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.
CIRCUIT OPERATION
• When the ETACS-ECU receives a "LOCK" signal
from the door lock actuator switch, it illuminates
the security indicator light for approximately 18
seconds, and then set the theft-alarm system.
• The ETACS-ECU sets the theft-alarm system
according to the input signals from the following
signals:
• Ignition key reminder switch: ON
• Driver's and front passenger's door switch:
OFF
• Rear door switches: OFF
• Driver's, front passenger's and back door lock
key cylinder switch: OFF
• Driver's, front passenger's, rear and back
doors actuator switch: LOCK
• Hood switch: OFF
• Transmitter switch: LOCK
• Vehicle condition:
• Ignition key: Removed from the ignition key
cylinder
• All doors: Closed
• Driver's, front passenger's and back door lock
key cylinder: Not being operated
• Hood: Closed
• Transmitter: Turn to the "LOCK" position
.
TECHNICAL DESCRIPTION (COMMENT)
If the theft-alarm system is set normally, the input sig-
nal circuit, the "SECURITY" indicator light or the
ETACS-ECU may be defective.
.
TROUBLESHOOTING HINTS
• The theft-alarm indicator light may be defective
• The ignition key reminder switch may be defec-
tive
• The driver's or front passenger's door switch may
be defective
• The door switches may be defective
• The driver's, the front passenger's or the back
door lock key cylinder switch may be defective
• The driver's, front passenger's, the rear or the
back door lock actuator switch may be defective
• The hood switch may be defective
• The transmitter 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
AC204174
CONNECTOR : D-224
D-224(B)
AG
SYMPTOM PROCEDURES
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SWS SYMPTOM PROCEDURES
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DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991502: Scan Tool (MUT-II)
• MB991862: SWS monitor kit
STEP 1. Use scan tool MB991502 to select "ECU COMM
CHK" on the SWS monitor display.
Check the ETACS-ECU.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector
(16-pin).
(2) Connect SWS monitor kit MB991862 to the data link
connector (13-pin).
(3) Turn the ignition switch to the "LOCK" (OFF) position.
(4) Operate scan tool MB991502 according to the procedure
below to display "ECU COMM CHK."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "ECU COMM CHK."
(5) Scan tool MB991502 should show "OK" on the "ECU
COMM CHK" menu for the "ETACS ECU" menu.
Q: Is "OK" displayed on the "ETACS ECU" menu?
YES : Go to Step 2.
NO : Refer to Inspection Procedure A-3 "Communication
with the ETACS-ECU is not possible
."
AC204222AB
16-pin
13-pin
MB991502
MB991862
SYMPTOM PROCEDURES
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STEP 2. Check at ETACS-ECU connector D-224 in order to
check the theft-alarm indicator light circuit.
(1) Disconnect ETACS-ECU connector D-224, and measure at
the wiring harness side.
(2) The theft-alarm indicator light should illuminate when
terminal 40 is grounded.
Q: Does the theft-alarm indicator light illuminate?
YES : Go to Step 9.
NO : Go to Step 3.
STEP 3. Check the theft-alarm indicator light.
(1) Remove the RV meter. Refer to GROUP 54A, RV meter
(2) Disconnect theft-alarm indicator light connector D-105.
(3) The theft-alarm indicator light should illuminate when
battery voltage is applied between terminals 1 and 2.
Q: Does the theft-alarm indicator light illuminate?
YES : Go to Step 4.
NO : Replace the theft-alarm indicator light. The theft-alarm
indicator light should illuminate, and the theft-alarm
system should be set normally.
AC204174
CONNECTOR : D-224
AD
D-224(B)
D-224(B)
HARNESS SIDE
21
23
24
22
32
3433
31
26
27
28
3029
38
39
40
36
37
25
35
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
AC100319AB
CONNECTOR D-224
(HARNESS SIDE)
AC204170
CONNECTOR : D-105
AL
HARNESS
SIDE
D-105(B)
D-105(B)
1
2
ACX02296
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