Mitsubishi Montero (2002-2004). Manual — part 235

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54Ba-17

• TURN SIGNAL

• BUZZER

NOTE: The headlight automatic shutdown function
works in approximately one second after the lighting
monitor tone alarm starts sounding, and then the
tone alarm ceases sounding.

ITEM

ITEM
NO.

INPUT SIGNAL

DISPLAY ON SCAN TOOL NORMAL CONDITION

TURN-SIG.LH

10

Turn-signal light
switch (RH)

T/S RH SW

OFF

11

Turn-signal light
switch (LH)

T/S LH SW

ON

30

Ignition switch
(IG1)

IG SW (IG1)

ON

TURN-SIG.RH

10

Turn-signal light
switch (RH)

T/S RH SW

ON

11

Turn-signal light
switch (LH)

T/S LH SW

OFF

30

Ignition switch
(IG1)

IG SW (IG1)

ON

ITEMS

ITEM
NO.

INPUT SIGNAL

DISPLAY ON SCAN TOOL NORMAL CONDITION

CENTR.DIS.AL
M

43

Tone alarm

BUZZER

ON

60

BEEP DATA

beep data

ON (2 kHz) (only
momentarily when switch is
operated)

KEY
REMND.ALM

30

Ignition switch
(IG1)

IG SW (IG1)

OFF

32

Front door switch

FRONT DOOR SW

ON

43

Tone alarm

BUZZER

ON

LGT
MONI.ALM

00

Headlight switch

HEADLIGHT SW

Either is on

01

Tail light switch

TAILLIGHT SW

30

Ignition switch
(IG1)

IG SW (IG1)

OFF

32

Front door switch

FRONT DOOR SW

ON

35

Headlight
automatic
shutdown function

H/L AUTO-CUT

OFF

43

Tone alarm

BUZZER

ON

OTHER
ALARM

30

Ignition switch
(IG1)

IG SW (IG1)

ON

43

Tone alarm

BUZZER

ON

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54Ba-18

• SUNROOF

• THEFT-ALARM

PULSE CHECK

M1549015100216

1. The input signals (signals other than SWS

communication line signals), which are
compatible with the SWS monitor by using the
scan tool or voltmeter, can be confirmed by the
Pulse Check. (Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

P.00-

6

.)

2. Use the scan tool or voltmeter to check the

following input signals.
NOTE: If a problem is found the Pulse Check,
proceed to the Problems during Input Signal
Check <Scan tool or voltmeter> (Refer to

P.54Bc-

2

).

Switches and their conditions, which are applicable
for Pulse Check

ITEM

ITEM
NO.

INPUT SIGNAL

DISPLAY ON SCAN TOOL NORMAL CONDITION

SUNROOF
OPE.

30

Ignition switch
(IG1)

IG SW (IG1)

ON

72

Response by the
sunroof-ECU

S/R ECU ACK

INPUT CHECK (only
momentarily when switch is
operated)

ITEM

ITEM
NO.

INPUT SIGNAL

DISPLAY ON SCAN TOOL NORMAL CONDITION

THEFT-ALARM 45

Theft-alarm
headlight

THEFTALM. H/L

ON

70

Response by the
front-ECU

FRONT ECU ACK

NORMAL ACK

INPUT SIGNAL

REQUIREMENT FOR SOUNDING
TONE ALARM

Key reminder switch

When the inserted ignition key is pulled
out

Hazard light switch

When the switch is turned from off to on

Seat belt which

When the seat belt is fastened

All door switches (excluding front door switch)

Either of the doors (excluding front door)
is opened

Driver's, front passenger's or back door lock key cylinder switch When the key cylinder is locked or

unlocked

Driver's, front passenger's, rear or back door lock actuator

When the driver's key cylinder or inside
lock knob is unlocked or locked

Door lock switch (incorporated in the power window main
switch)

When a door is locked or unlocked by a
door lock switch

Hood switch

When the hood is opened

Keyless entry system transmitter

Switches

When the switch is turned from off to on

CHECK AT ECU TERMINAL

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54Ba-19

CHECK AT ECU TERMINAL

M1549001200436

1. ETACS-ECU

NOTE: *: The terminal 1 to 20 connectors can not be
measured as the ETACS-ECU is installed directly on
the junction block. Therefore, this information is only
for reference.

19 20

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

21 22 23 24 25 26 27 28 29 30

31 32 33 34 35 36 37 38 39 40

41 42 43 44 45 46 47 48

49 50 51 52 53 54 55 56

ACX01511

*

AB

TERMINAL
NO.

INSPECTION ITEM

INSPECTION CONDITION

NORMAL VALUE

1

Output to rear wiper

When rear wiper is operating

Battery positive voltage

2

Power supply to ignition switch
(ACC)

Ignition switch: "ACC"

Battery positive voltage

3

Output to rear washer

When rear washer is operating

Battery positive voltage

4

Output to door lock

When door lock actuator is
operating (doors locked)

Battery positive voltage

5

Input of automatic stop signal to
rear wiper

When rear wiper is operating

Battery positive voltage

6

Battery power supply (for ECU)

Always

Battery positive voltage

7

Input from door switches

Either of door switches: ON
(Door open)

0 V

8

Output to power window relay

When the power windows can
work

2 V or less

9

Input from driver's door switch

Driver's door switch: ON (Driver's
door open)

0 V

11

Battery power supply (for turn-
signal light)

Always

Battery positive voltage

12

Battery positive voltage (for
central door lock)

Always

Battery positive voltage

14

Output to turn-signal light (LH)

When turn-signal light (LH) is on Battery positive voltage

15

Output to turn-signal light (RH)

When turn-signal light (RH) is on Battery positive voltage

16

Power supply to ignition switch
(IG1)

Ignition switch: "ON"

Battery positive voltage

17

Output to door unlock (excluding
direr's door)

When door lock actuator is
operating (doors unlocked)

Battery positive voltage

18

Output to dome light

When dome light is on

2 V or less

19

Output to door unlock (for
driver's door)

When driver's door lock actuator
is operating (doors unlocked)

Battery positive voltage

20

Ground (for ECU)

Always

0 V

21

SWS communication line

Always

0

− 12 V (pulse signal)

22

Input of diagnosis indication
selection

When scan tool is connected

0 V

23

Ground (for sensor)

Always

0 V

CHECK AT ECU TERMINAL

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54Ba-20

24

Input from fog light switch

Fog light switch: ON (When the
switch is depressed)

0 V

25

Input of driver's seat belt switch
signal

Driver's seat belt switch: ON
(seat belts unfastened)

0 V

26

Input of key reminder switch
signal

Key reminder switch: ON
(ignition key removed)

0 V

27

Input of hazard warning light
switch signal

Hazard warning light switch: ON
(When the switch is depressed)

0 V

28

Input of back door lock key
cylinder switch (LOCK) signal

Back door lock key cylinder
switch: LOCK

0 V

29

Input of front passengers's door
switch signal

Front passenger's door switch:
ON (Front passenger's door
open)

0 V

31

Output of data request signal

Always

0

− 5 V (pulse signal)

34

Input of signal from windshield
intermittent wiper interval
adjusting knob

Ignition switch: "ACC,"
Windshield intermittent wiper
interval adjusting knob: "FAST"
→ "SLOW"

0

→ 2.5 V

35

Input of "R" position signal from
transmission range switch

Ignition switch: "ON,"
Selector lever: "R"

Battery positive voltage

36

Output to ignition key hole
illumination light

When ignition key hole
illumination light is on

2 V or less

37

Output to data link connector

When DTC sets

0

− 12 V (pulse signal)

When input check signal is
output

0

− 12 V (when input

pulse signal is
fluctuating)

39

Output to seat belt warning light When seat belt warning light is

on

2 V or less

40

Output to the theft-alarm
indicator light

When the theft-alarm indicator
light is on

2 V or less

42

Output to horn

When a horn sounds by the
keyless entry horn answerback
function or the theft-alarm
system

2 V or less

45

Input of back door lock key
cylinder switch (UNLOCK) signal

Back door lock key cylinder
switch: UNLOCK

0 V

46

Input of front passenger's door
lock actuator switch (UNLOCK)
signal

Front passenger's door lock
actuator switch: UNLOCK

0 V

47

Input of rear and back door lock
actuator switch (UNLOCK)
signals

Rear or back door lock actuator
switch: UNLOCK

0 V

48

Input signal from the hood switch Hood switch: ON (Hood open)

0 V

49

Output to the theft-alarm horn

When theft-alarm horn is
sounding

2 V or less

TERMINAL
NO.

INSPECTION ITEM

INSPECTION CONDITION

NORMAL VALUE