Mitsubishi Montero (2004+). Manual — part 802
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-465
STEP 1. Use scan tool MB991958 to select "ECU COMM
CHK" on the SWS monitor display.
Check the ETACS-ECU.
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 the special tool. Refer to "How to connect SWS
monitor
.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Operate scan tool MB991958 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."
(4) Scan tool MB991958 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 ETACS-ECU is not possible
AC309091
MB991911
MB991827
MB991824
AB
MB991806
MB991862
DATA LINK
CONNECTOR
(16-PIN)
DATA LINK
CONNECTOR
(13-PIN)
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-466
STEP 2. Check the input signal by using "DATA LIST"
menu of the SWS monitor.
Check the input signals from the following switches:
• Ignition switch: OFF
• Driver's door: open
• Front passenger's door: closed
Operate scan tool MB991958 according to the procedure below
to display "ETACS ECU."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "DATA LIST."
5. Select "ETACS ECU."
Check that normal conditions are displayed on the items
described in the table below.
Q: Are normal conditions displayed on the "IG SW (IG1)"
and "FRONT DOOR SW"?
YES : Go to Step 3.
Normal condition is not displayed "IG SW (IG1)" : Refer
to Inspection Procedure O-2 "ETACS-ECU does not
receive any signal from the ignition switch (IG1)
Normal condition is not displayed "FRONT DOOR SW" :
Refer to Inspection Procedure O-5 "ETACS-ECU
does not receive any signal from the driver's or the
front passenger's door switch
."
ITEM NO.
ITEM NAME
NORMAL CONDITION
ITEM 30
IG SW(IG1)
OFF
ITEM 32
FRONT DOOR SW
ON
AC309091
MB991911
MB991827
MB991824
AB
MB991806
MB991862
DATA LINK
CONNECTOR
(16-PIN)
DATA LINK
CONNECTOR
(13-PIN)
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-467
STEP 3. Check the input signal (by using the pulse check
mode of the monitor.)
Check the input signals from the key reminder switch.
Operate scan tool MB991958 according to the procedure below
to display "PULSE CHECK."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "PULSE CHECK."
• Check whether scan tool MB991958 sounds or not when
the ignition key is removed and reinserted.
Q: Does scan tool MB991958 sound when the ignition key
is removed and reinserted?
YES : Go to Step 4.
NO : Refer to Inspection Procedure P-1 "ETACS-ECU does
not receive any signal from the key reminder switch
STEP 4. Check ETACS-ECU connector D-224 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector D-224 in good condition?
YES : Go to Step 5.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Verify that the ignition key hole illumination
light illuminates normally.
AC307591 AB
MB991911
DATA LINK
CONNECTOR
MB991824
MB991827
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
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-468
STEP 5. Check at ETACS-ECU connector D-224 in order to
check the line from the ignition key hole illumination light.
(1) Disconnect ETACS-ECU connector D-224, and measure at
the wiring harness side.
(2) Connect terminal 36 to ground.
Q: Does the ignition key hole illumination light illuminate?
YES : Replace the ETACS-ECU. Verify that the ignition key
hole illumination light illuminates normally.
NO : Go to Step 6.
STEP 6. Check the ignition key hole illumination light bulb.
Q: Is the ignition key hole illumination light bulb in good
condition?
YES : Go to Step 7.
NO : Replace the bulb. Verify that the ignition key hole
illumination light illuminates normally.
STEP 7. Check key reminder switch connector D-202 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is key reminder switch connector D-202 in good
condition?
YES : Go to Step 8.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Verify that the ignition key hole illumination
light illuminates 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
ACX01584AB
CONNECTOR D-224
(HARNESS SIDE)
AC204172
CONNECTOR: D-202
AK
HARNESS SIDE
4
5
3
1
6
7
2
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