Mitsubishi Montero (2002-2004). Manual — part 355

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

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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 MB991502 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.
NO :

• 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)

P.54Bc-7

."

• 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

P.54Bc-23

."

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 MB991502 according to the procedure below
to display "PULSE CHECK."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "PULSE CHECK."

• Check whether scan tool MB991502 sounds or not when

the ignition key is removed and reinserted.

Q: Does scan tool MB991502 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

P.54Bc-49

."

ITEM NO.

ITEM NAME

NORMAL CONDITION

ITEM 30

IG SW(IG1)

OFF

ITEM 32

FRONT DOOR SW

ON

AC204222AB

16-pin

13-pin

MB991502

MB991862

AC204222AB

16-pin

13-pin

MB991502

MB991862

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

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STEP 4. 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 5.

STEP 5. Check the ignition key hole illumination light bulb.
Q: Is the ignition key hole illumination light bulb in good

condition?
YES : Go to Step 6.
NO : Replace the bulb. Verify that the ignition key hole

illumination light illuminates normally.

STEP 6. Check the key reminder switch (ignition key hole
illumination).
(1) Disconnect key reminder switch connector D-202.
(2) Remove the ignition key hole illumination light bulb. Then

measure the resistance value between the bulb terminals.

(3) Install a bulb to the key remainder switch, and measure the

resistance between connector D-202 terminal 1 and 2.The
measured resistance value should be roughly the same as
the value measured in Step (2).

Q: Are these two resistance values extremely different?

YES : Replace the key reminder switch. Verify that the

ignition key hole illumination light illuminates normally.

NO (roughly the same) : Go to Step 7.

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

AB

HARNESS SIDE

4

5

3

1

6

7

2

D-203

SYMPTOM PROCEDURES

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STEP 7. Check the fusible link (1) line of the power supply
circuit to the key reminder switch. Test at key reminder
switch connector D-202.
(1) Disconnect key reminder switch connector D-202 and

measure at the voltage available at the wiring harness side
of the connector.

(2) Measure the voltage between terminal 2 and ground.

• The voltage should be approximately 12 volts (battery

positive voltage).

Q: Is the measured voltage approximately 12 volts (battery

positive voltage)?
YES : Go to Step 10.
NO : Go to Step 8.

STEP 8. 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 9.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. Verify that the ignition key hole illumination

light illuminates normally.

AC204172

CONNECTOR : D-202

AB

HARNESS SIDE

4

5

3

1

6

7

2

D-203

5 4 3

2

1

7 6

AC100253AB

CONNECTOR D-202
(HARNESS SIDE)

AC204172

CONNECTOR : D-202

AB

HARNESS SIDE

4

5

3

1

6

7

2

D-203

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

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STEP 9. Check the wiring harness between key reminder
switch connector D-202 (terminal 2) and fusible link (1).

NOTE: Also check intermediate connector D-28 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connectors D-28 is damaged, repair
or replace the damaged component(s) as described in GROUP
00E, Harness Connector Inspection

P.00E-2

.

Q: Is the wiring harness between key reminder switch

connector D-202 (terminal 2) and fusible link (1) 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 ignition key hole illumination light illuminates
normally.

ACX02274

FUSIBLE LINK (1)

AE

BATTERY

AC204172

CONNECTOR : D-202

AB

HARNESS SIDE

4

5

3

1

6

7

2

D-203

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