Mitsubishi Pajero Pinin. Manual - part 350

SWS –

General Information

54B-2

GENERAL INFORMATION

COMMUNICATION LINE

Data lines for multiplex communication are connected between the front-ECU, ETACS-ECU, column switch
assembly, multi-center display, power window main switch, and power window motors as illustrated below.

ETACS-ECU

MUT-

Column switch
(column-ECU)

Front-ECU

Multi-center display

Power window
main switch

Power window motor-ECU
(driver’s side)

Power window motor-ECU
(passenger’s side)

: Uni-directional communication line
: Bi-directional communication line

OPERATION

BUZZER

Light Reminder Warning Function

When the driver’s door is opened (driver’s door
switch ON) with light switch in the TAIL or HEAD
position, the buzzer will sound continuously to
remind the driver that the lights (taillights or
headlights) are ON.

Multi-center Display Buzzer Function

If there is a request from the multi-center display
to make the buzzer sound, the ETACS-ECU causes
the buzzer to sound.

CENTRAL DOOR LOCKING SYSTEM

Central Door Locking System Operation

If a door is locked or unlocked by using any one
of the key cylinders (driver’s door, passenger’s door
or back door), all of the doors are locked or unlocked.
In addition, all doors can be locked and unlocked
by using the driver’s door lock knob.

Forgotten Key Prevention Function

This function automatically release the door lock
if the inside door lock knob is placed in the lock
position with the door opened while the key is still
in the ignition switch, thereby preventing the key
from being left behind locked door.

SWS –

General Information

54B-3

POWER WINDOWS

Power Windows Operation

A signal line dedicated for transmission of multiplex
communication data is connected between the
power window main switches and the power window
motor-ECU.
Communication is uni-directional. The power
window main switches have a transmitting circuit
only, whereas the power window sub switches have
a receiving circuit only.

Power Window Timer Function

With the ignition switch in the ON position, the power
window relay and power window switch receipt
permission are turned ON [the power window switch
receipt permission signal remains ON for 30 seconds
after the ignition switch is turned LOCK (OFF)],
enabling opening and closing of the windows. The
power window relay goes ON for additional 30
seconds. If the driver’s door is subsequently closed
during this period, the receipt permission signal goes
OFF. The power window relay goes OFF 10 seconds
after the receipt permission signal goes OFF.

KEYLESS ENTRY SYSTEM

If the transmitter LOCK or UNLOCK switch is
pressed while the ignition key is removed and all
of the doors are closed, the doors can be locked
or unlocked. If the doors are closed, the hazard
warning lamps, the room lamp and the horn will
operate due to answerback function. Because of
the answerback function, the hazard warning lamps

flash twice, and the room lamp flashes twice when
the doors are locked. Meanwhile, when the doors
are unlocked, the hazard warning lamps flash and
the room lamp illuminate for 15 seconds. The hazard
answerback functions can be cancelled by using
the MUT-

WINDSHIELD WIPER AND WASHER

Windshield Low-speed (and High-speed)
Wiper Operation

If the windshield low-speed wiper switch is
turned to the ON position with the ignition switch
at the ACC or ON position, the column switch
sends a low-speed wiper ON and high-speed
wiper OFF signals to the front-ECU.
This turns the wiper signal on and the wiper
speed switching relay off (low-speed), causing
the wipers to operate at low-speed.

If the windshield high-speed wiper switch is
turned to the ON position, the column switch
sends a low-speed wiper OFF and high-speed
wiper ON signals to the front-ECU.
This turns both the wiper signal and the wiper
speed switching relay on (high-speed), causing
the wipers to operate at high-speed.

Windshield Intermittent Wiper Operation

The ETACS-ECU calculates the wiper operation
interval according to the voltage signal sent from
the column switch. (For vehicles without variable
intermittent wiper, the intermittent interval is fixed
at 4 seconds.) Then the ETACS-ECU sends a signal
to the front-ECU. The front-ECU determines the
wiper operation interval and turns on the wiper signal
relay. This causes the wiper auto stop relay to turn
on. Then the wiper auto stop relay will turn off after
the wipers reach the park position. This causes
the wiper signal relay and then the wipers to turn
off.
If the wiper signal relay remains off for the wiper
operation interval, the relay turns on again, causing
the wipers to operate in intermittent mode.

Windshield Mist Wiper Operation

If the windshield mist wiper switch of the column
switch is turned to the ON position with the
ignition switch at ACC or ON position, the mist
wiper high-speed operation signal is sent to
the front-ECU. This signal turns on the wiper
speed switching relay, causing the wipers to
work at high-speed while the mist switch is on.

While the windshield mist wiper switch remains
turned on when the intermittent mode is still
working, the wipers work as the mist wiper.
However, the wipers return to the intermittent
mode again when the wiper auto stop signal
turns on after the mist wiper switch is turned
off.

Windshield Washer Operation

If the windshield washer switch of the column switch
is turned to the ON position with the ignition switch
at ACC or ON position, the windshield washer ON
signal is sent to the front-ECU, causing the
windshield wiper signal to turn on after 0.3 seconds.
After the windshield washer switch signal turns off,
the windshield wiper signal turns off in three
seconds.
If the windshield wiper switch is turned to the ON
position while the windshield wiper is at intermittent
mode, the windshield washer works for that period
when the windshield washer switch remains on.
Then the wipers return to the intermittent mode.

SWS –

General Information

54B-4

REAR WIPER AND WASHER

Rear Wiper Operation

If the rear wiper switch is turned to the ON position
with the ignition switch at ACC or ON position, the
ETACS-ECU cause the rear wiper to operate
continuously two times then intermittently at
eight-second intervals.
If the shift lever <M/T> selector lever <A/T> is moved
to the R position when the rear wiper switch is turned
to the ON position and the ignition switch at ACC
or ON position, back-up lamp switch <M/T> or
inhibitor switch R <A/T> turns ON. One second later,
the ETACS-ECU causes the rear wiper to operate
two times continuously to ensure good rearward
visibility. The ETACS-ECU then causes the rear
wiper to again operate intermittently at eight-second
intervals.

Rear Washer Operation

If the rear washer switch is turned to the ON position
with the ignition switch at ACC or ON position, the
rear washer ON signal is sent to the ETACS-ECU,
causing the rear wiper signal to turn on after 0.3
seconds. After the rear washer switch signal turns
off, the rear wiper signal turns off in three seconds.
If the rear wiper switch is turned to the ON position
while the rear wiper is at intermittent mode, the
rear washer works for that period when the washer
switch remains on. Then the rear wipers return to
the intermittent mode.

HEADLAMP WASHER

If the headlamp washer switch of the column switch
assembly is turned to the ON position with the

ignition switch in the ACC or ON position, the
front-ECU turns on the headlamp washer relay.

HEADLAMP

Headlamp Auto-cut Function

If the ignition switch is turned to LOCK (OFF) or
ACC position, when the headlamps are on, the
headlamps will be switched off in three minutes.
If the driver’s door is opened within that three-minute
period, the headlamps will be switched off
automatically. This prevents the battery from
discharged.
In addition, if the headlamps are turned on when
the ignition switch is at LOCK (OFF) or ACC position,
the headlamps will not be switched off.

Headlamp Dimmer Switch Auto-reset
Function

This function allows the dimmer switch to be reset
to the low-beam position whenever the headlamp
switch is turned ON.

Daytime Running Lamp (DRL) Function

If the ignition switch is turned to ON when the
headlamps and tail lamps are off, the headlamps
(low-beam) and tail lamps turn on.

FLASHER TIMER

Turn-signal Lamp

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

Hazard Warning Lamp

The system detects a change from ON to OFF of
the hazard lamp input signal and activates the
hazard lamps if they are not in operation or
deactivates the lamps if they are operating (reversal
of state between activation and deactivation).

FRONT FOG LAMP

The front fog lamp switch becomes active only when
the tail lamps are on. Therefore, if the tail lamps
are turned off, the fog lamps will also be switched

off. Whenever the tail lamps are turned on at the
next time, the front fog lamps will always be off
regardless of the switch positions.

REAR FOG LAMP

The rear fog lamp switch becomes active only when
the headlamps or front fog lamps* are on. Therefore,
if the headlamps and front fog lamps* are turned
off, the rear fog lamps will also be switched off.
Whenever the headlamps or front fog lamps* are

turned on at the next time, the rear fog lamps will
always be off regardless of the switch positions.

NOTE
*:

In vehicles without front fog lamps, these
conditions apply to the headlamps only.

SWS –

General Information/Special Tools

54B-5

ROOM LAMP

With the room lamp switch in the DOOR position,
the ETACS-ECU controls the room lamp operation
as follows:

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

When a door is opened or closed with the ignition
switch in the ON position:
The room lamp illuminates 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:

When the ignition key is removed with all the
doors closed, the room lamp is illuminated at
an intensity of 65% and turned out approx. 30
seconds later. During that time (timer-controlled
period), the room lamp does out if the ignition
key is inserted and turned to ON position or
the door locking system is activated.

Room lamp’s answerback operation in response
to door lock control by keyless entry system:

To allow the driver to ascertain the result of
the door locking/unlocking control action by the
use of the keyless entry system, the
ETACS-ECU causes the room lamp to blink
twice when the doors are locked through the
system and to illuminate for approx. 15 seconds
when the doors are locked.
The room lamp’s answerback operation in
response to a keyless entry system control
action is accompanied by operation of the
hazard warning lamps.

SPECIAL TOOLS

Tool

Number

Name

Use

MB991502

MUT-

sub

assembly

Checking of the SWS
(Diagnosis code display and input check
with the MUT-

)

MB991529

Diagnosis code
check harness

Simple diagnosis

MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222

Harness set
A: Test harness
B: LED harness
C: LED harness

adapter

D: Probe

Measurement of terminal voltage at ECUs
A: Connector pin contact pressure inspec-

tion

B: Power circuit inspection
C: Power circuit inspection
D: Commercial tester connection

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