Mitsubishi Montero (2004+). Manual — part 779
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-373
.
CIRCUIT OPERATION
• The turn-signal light switch sends any signal
through the column-ECU (incorporated in the col-
umn switch) to the ETACS-ECU. If the col-
umn-ECU sends a turn-signal light switch "ON"
signal to the ETACS-ECU, the ETACS-ECU turns
on the flasher timer (incorporated in the
ETACS-ECU), thus causing the turn-signal lights
to flash.
• The ETACS-ECU operates the turn-signal lights
according to the following signals:
• Ignition switch (IG1)
• Turn-signal light switch
.
TECHNICAL DESCRIPTION (COMMENT)
Is the turn-signal lights do not flash normally, the
input circuits from the switches described in "CIR-
CUIT OPERATION" or the ETACS-ECU may be
defective. If the hazard warning lights do not flash,
the power supply line to the ETACS-ECU (dedicated
to the turn-signal lights) may be defective.
.
TROUBLESHOOTING HINTS
• The column switch (turn-signal light and lighting
switch) 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
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
• MB991813: SWS Monitor Kit
• MB991806: SWS Monitor Cartridge
• MB991812: SWS Monitor Harness (For Column-ECU)
• MB991822: Probe Harness
AC204170
CONNECTOR : D-28
BB
AC204173
CONNECTORS : D-210, D-212, D-217, D-221
D-210
D-217
D-212
AW
D-221
AC204174
CONNECTOR : D-222
AE
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-374
STEP 1. Verify the hazard warning light operation.
Q: Does the hazard warning light work normally?
YES : Go to Step 7.
NO : Go to Step 2.
STEP 2. Verify the turn-signal light operation.
Q: Does either of the turn-signal lights illuminate?
YES (illuminates at only one side) : Go to Step 3.
NO (do not illuminate at all) : Go to Step 4.
STEP 3. Check ETACS-ECU connector D-222, junction
block connectors D-210, D-212 and D-217 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Are ETACS-ECU connector D-222, junction block
connectors D-210, D-212 and D-217 in good condition?
YES : Replace the ETACS-ECU. Verify that the turn-signal
lights illuminate normally.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Verify that the turn-signal lights illuminate
normally.
AC204191
CONNECTORS : D-210, D-212, D-217
D-210
AG
HARNESS SIDE
HARNESS SIDE
D-217
D-210
HARNESS SIDE
D-212
D-212
D-217
1
2
7 6
3
9
4
11
12
10
13
5
8
8
1
11 10
3
4
12
9
2
13
14
6 5
15
7
7 6 5
2 1
9 8
11 10
4 3
AC204174
CONNECTOR : D-222
AB
1
2
3
5
6
4
9 8
121110
13
15 14
16
17
7
19
20
18
JUNCTION BLOCK SIDE
D-222
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-375
STEP 4. Check ETACS-ECU connector D-222 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector D-222 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 turn-signal lights illuminate
normally.
STEP 5. Check the battery power supply circuit to the
ETACS-ECU. Test at ETACS-ECU connector D-222.
(1) Disconnect ETACS-ECU connector D-222 and measure the
voltage available at the junction block side of the connector.
(2) Measure the voltage between terminal 11 and ground.
• The voltage should be approximately 12 volts (battery
positive voltage).
Q: Is the measured voltage approximately 12 volts (battery
positive voltage)?
YES : Replace the ETACS-ECU. Verify that the turn-signal
lights illuminate normally.
NO : Go to Step 6.
STEP 6. Check the wiring harness between ETACS-ECU
connector D-222 (terminal 11) and the battery.
AC204174
CONNECTOR : D-222
AB
1
2
3
5
6
4
9 8
121110
13
15 14
16
17
7
19
20
18
JUNCTION BLOCK SIDE
D-222
AC204174
CONNECTOR : D-222
AB
1
2
3
5
6
4
9 8
121110
13
15 14
16
17
7
19
20
18
JUNCTION BLOCK SIDE
D-222
ACX01589
19
20
1817 1615 141312 1110 9 8 7
6 5 4 3 2 1
AB
CONNECTOR D-222
(JUNCTION BLOCK SIDE)
AC204174
CONNECTOR : D-222
AB
1
2
3
5
6
4
9 8
121110
13
15 14
16
17
7
19
20
18
JUNCTION BLOCK SIDE
D-222
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-376
NOTE: Also check intermediate connector D-28 and junction
block connector D-221 for loose, corroded, or damaged termi-
nals, or terminals pushed back in the connector. If intermediate
connector D-28 or junction block connector D-221 is damaged,
repair or replace the damaged component(s) as described in
GROUP 00E, Harness Connector Inspection
Q: Is the wiring harness between ETACS-ECU connector
D-222 (terminal 11) and the battery in good condition?
YES : No action is necessary and testing is complete.
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. Verify that
the turn-signal lights illuminate normally.
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
AC204173
CONNECTOR : D-221
AJ
HARNESS SIDE
3
1
4
6 5
7
8
2
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