Mitsubishi Montero (2002-2004). Manual — part 336

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

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SYMPTOM PROCEDURES

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INSPECTION PROCEDURE K-1: Flasher Timer: Turn-signal lights do not flash when the turn-signal
light switch is operated.

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

P.54Ba-8

."

Turn-signal Light Power Supply Circuit

AC204170

CONNECTOR : D-28

BB

AC204173

CONNECTORS : D-210, D-212, D-217, D-221

D-210

D-217

D-212

AW

D-221

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.

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 column-
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

• MB991502: Scan Tool (MUT-II)

• MB991862: SWS monitor kit

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.

AC204174

CONNECTOR : D-222

AE

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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

P.00E-2

. 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