Mitsubishi Montero (2004+). Manual — part 687

GENERAL DESCRIPTION

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-5

SEAT BELT WARNING LIGHT

If any of the following conditions is met with the igni-
tion switch at "ON" or "ST", the ETACS-ECU illumi-
nates the indicator light by using the driver's seat belt
switch signal.

• The ETACS-ECU illuminates the indicator light

for six seconds if the ignition switch is turned
"ON" while the seat belt switch is on (the driver's
seat belt is not fastened).

• The ETACS-ECU flashes the indicator light 12

cycles (after 0.5 seconds) if the seat belt switch is
on (driver's seat belt is not fastened) when sixty
seconds or more have elapsed since the ignition
switch is turned "ON". One cycle consists of
five-second "on" and then three-second "off".

NOTE: The ETACS-ECU stops flashing the indicator
light immediately when the seat belt witch is off
(driver's seat belt is fastened) or the ignition switch is
turned to the "OFF" or "ACC" position while the seat
belt tone alarm function is working.

HEADLIGHT

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Headlight automatic shutdown function
When the headlights or taillights are on, and the igni-
tion switch is turned from "ON" to "LOCK" (OFF) or
"ACC" position or the ignition key is removed, the
headlights will be switched off in three minutes. If the
driver's door is opened within that three-minute
period, the headlights will be switched off automati-
cally. This prevents the battery from discharging.
NOTE: The headlight automatic shutdown function
can be disabled by the SWS configuration function.
Refer to

P.54B-635

.

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Headlight dimmer switch automatic resetting
function
This function allows the dimmer switch to be reset to
the low-beam position whenever the headlight switch
is turned to the ON position.

FLASHER TIMER

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Turn-signal light
When the ignition switch is turned to the "ON" posi-
tion and turn-signal light switch is placed in the ON
position for right or left turn-signaling, the system
generates turn-signal light drive signals (flashing sig-
nals). The system also notifies of a blown turn-signal
light bulb by shortening the flashing intervals of the
corresponding indicator light.

.

Hazard warning light
The system detects a change from OFF to ON of the
hazard warning input signal and activates or shuts off
the hazard warning lights accordingly.

FOG LIGHT

The fog light switch becomes active only when the
headlights are at the low-beam mode. Therefore, if
the headlights are turned off, the fog lights will also
be switched off. When the headlights are turned on
during the next key cycle, the fog lights will be off
regardless of the fog light switch position.

DOME LIGHT

With the dome light switch in the "door controlled
operation" (middle) position, the ETACS-ECU con-
trols the dome light operation as follows:

• When a door is opened from outside or inside

[with the ignition switch turned to "LOCK" (OFF)]:
When a door is opened, the ETACS-ECU causes
the dome light to be illuminated at 100% intensity.
When the door is closed, it dims the dome light to
65% intensity and approximately 30 seconds
later, turns out the light completely. During this
period (timer controlled period), the dome light
goes out if the ignition switch is turned "ON" or
the doors are locked.

• When a door is opened or closed with the ignition

switch in the "ON" position: The dome light illumi-
nates at 100% intensity when a door is opened
and turned out when it is closed.

• When no door is opened and the ignition key is

removed: The dome light is illuminated at 100%
intensity and turned off approximately 30 sec-
onds later. During that time (timer-controlled
period), the dome light goes out if the ignition key
is inserted and turned to "ON" or the door locking
system is activated.

• Dome light's answerback operation in response

to door lock control by keyless entry system: To
allow the driver to confirm the doors have locked
by the keyless entry system, the ETACS-ECU
causes the dome light to blink twice when the
doors are locked by the RKE system and to illu-
minate for approximately 15 seconds when the
doors are locked. The dome light's answerback
operation in response to a keyless entry system
control action is accompanied by flashing of the
hazard warning lights.

SWS DIAGNOSIS

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-6

THEFT-ALARM SYSTEM

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Theft-alarm System Operation
If a door, back door or hood is opened, when the
theft-alarm system has been armed the horn
(theft-alarm horn and horn) will sound and headlights
flash (high-beam) intermittently for a period of 180
seconds.

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Panic Alarm Function
With the theft-alarm function armed, pressing the
panic button on the keyless entry system transmitter
causes the horn (theft-alarm horn and horn) to sound
for about 180 seconds in an attempt to prevent theft.
The alarm is turned off by pressing any switch on the
transmitter.

CONFIGURATION FUNCTION

The keyless entry hazard answerback function and
the headlight automatic shutdown function can be
adjusted by the special operation. Or they can be
returned to the initial condition.

SWS DIAGNOSIS

GENERAL DESCRIPTION

BEFORE CARRYING OUT TROUBLESHOOTING

M1549014700204

Before carrying out troubleshooting, check the fol-
lowing two items.

• Make sure that the ETACS-ECU, the junction

block (J/B), the front-ECU and the engine com-
partment relay box are connected securely.

• Make sure that fuses and fusible links related to

relevant systems are not blown.

SWS DIAGNOSTIC TROUBLESHOOTING STRATEGY

M1549000500638

1. Gather information about the problem from the

customer.

2. Verify that the condition described by the

customer exists.
NOTE: If an error occurs in the SWS communica-
tion line, the ECU isolated from the communica-
tion line performs a fail-safe or backup operation,
so the problem may not match the one shown in
the Trouble Symptom Chart. However, the cause
of the failure can be tracked down by performing
the following troubleshooting with the SWS moni-
tor.

3. Version number and destination check

Check whether the SWS version number (0) and
destination (North America) meet the vehicle
specifications. If they are different, replace the
ETACS-ECU with a correct one.

4. Use scan tool to select "ECU COMM CHK" on the

SWS monitor display.
Check whether the communication status of the
input- or output-signal-side ECU associated with
the defective function is normal.

• If "OK" is displayed for all related ECUs, they

communicate with each other normally and the
input or output signal circuit system may be
defective. Therefore, check SWS monitor service
data.

• If "NG" is displayed for any of the related ECUs,

something may be wrong with the ECU for which
"NG" appears, its power supply or grounding sys-
tem, or a wiring harness or connector between
the SWS monitor and the ECU. Check the wiring
harness and connectors associated with the ECU
and examine the ECU itself.

5. Service data on the SWS monitor

Select the defective function from the
function-specific diagnostic menu, and check the
service data that appears for each function item.
NOTE: In addition to the function-specific diag-
nostic menu, a service data menu is available for
SWS monitor service data to check all items for
each ECU.
(1) When the SWS communication line is

monitored.

SWS DIAGNOSIS

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-7

(2) You can determine whether the problem lies in

the input or output signal circuit system by
checking whether communication data is
correct.

• The switch condition does not meet the service

data display: Input signal system related to defec-
tive functions

• The switch condition meets the service data dis-

play: Output signal system related to defective
functions

6. Check of input signal circuit system

Check relevant switch, sensor, input signal-side
ECU and their wiring harness and connector.

7. Check of output signal circuit system

Check an output signal-side ECU, electrical load
components and their wiring harness and
connector.

HOW TO CONNECT SWS MONITOR

M1549014800494

Required Special Tools:

• 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

• MB991863: SWS Monitor Harness (For 13-pin)

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. Connect
the main harness B MB991911 before connecting the SWS
monitor harness (for 13-pin) MB991862 or the SWS moni-
tor harness (for column-ECU) MB991812. Be sure to con-
nect SWS monitor cartridge MB991806 after turning on the
V.C.I. MB991924.

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SWS DIAGNOSIS

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-8

SWS communication line connecting method <SWS
monitor harness (for 13-pin)>
1. Ensure that the ignition switch is at the "LOCK" (OFF)

position.

2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824

and the personal computer.

4. Connect special tool MB991911 to special tool MB991824.
5. Connect special tool MB991911 to the data link connector

(16-pin).

6. Connect special tool MB991812 to data link connector

(13-pin).

7. Connect special tool MB991862 to special tool MB991806.
8. Connect special tool MB991806 to special tool MB991824.
9. Turn the power switch of special tool MB991824 to the "ON"

position.
NOTE: When special tool MB991824 is energized, special
tool MB991824 indicator light will be illuminated in a green
color.

10.Start the MUT-III system on the personal computer.

.

AC309091

MB991911

MB991827

MB991824

AB

MB991806

MB991862

DATA LINK
CONNECTOR
(16-PIN)

DATA LINK
CONNECTOR
(13-PIN)

AC208681

MB991806

AD

MB991862

MB991824

MB991911

MB991827