Mitsubishi Montero (2002-2004). Manual — part 232
GENERAL DESCRIPTION
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SIMPLIFIED WIRING SYSTEM (SWS)
54Ba-5
HEADLIGHT
.
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
.
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
.
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.
THEFT-ALARM SYSTEM
.
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 sec-
onds.
.
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
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SIMPLIFIED WIRING SYSTEM (SWS)
54Ba-6
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
M1549000500359
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.
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.
SWS DIAGNOSIS
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SIMPLIFIED WIRING SYSTEM (SWS)
54Ba-7
HOW TO CONNECT SWS MONITOR
M1549014800212
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502. Connect
the DLC harness before connecting the column-ECU har-
ness. Be sure to connect SWS monitor kit MB991862 after
turning on scan tool MB991502.
SWS communication line connecting method <SWS monitor
harness (for 13-pin)>
• Connect the SWS monitor harness (for 13-pin) to the data
link connector (13-pin).
SWS communication line connecting method <SWS monitor
harness (for column-ECU)>
1. Remove the steering column cover.
2. Remove the steering column switch connector.
3. Connect the SWS monitor harness (for column-ECU).
AC204222AB
16-pin
13-pin
MB991502
MB991862
AC102200
COLUMN SWITCH
CONNECTOR
COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE
SWS MONITOR
HARNESS (FOR
COLUMN-ECU)
AB
SWS DIAGNOSIS
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SIMPLIFIED WIRING SYSTEM (SWS)
54Ba-8
HOW TO USE SWS MONITOR
M1549020400097
Troubleshooting with SWS monitor showing sample scan tool (MUT-II) screens.
AC102123
SELECT "ECU COMM CHK"
SELECT "FUNCTION DIAG."
AB
SELECT "DATA LIST"
SELECT
SWS SUB SYSTEM
SELECT ITEM
SELECT
FUNCTION
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