Mitsubishi Galant (2004+). Manual - part 1684

MULTI-DISTRIBUTION INPUT/OUTPUT BY CIRCUIT

SIMPLIFIED WIRING SYSTEM (SWS)

54B-7

Sunroof

•

Sunroof timer function

AC305318

Circuit and Input Switch and Sensor

ECUs and Switches 
Connected by Multi-
Distribution

Output Side

AB

Sunroof-ECU
(Sunroof motor 
assembly)

• 

Ignition switch (IG1)

• 

Driver's door switch

• 

Passenger's door switch

• 

Ignition switch (IG2)

ETACS-ECU

Combination meter

• 

Ignition switch (IG1)

: CAN communication line

: SWS communication line

DIAGNOSTIC FUNCTION

SIMPLIFIED WIRING SYSTEM (SWS)

54B-8

DIAGNOSTIC FUNCTION

M2541003000211

DIAGNOSTIC TROUBLE CODE SET

If there is a problem with the communication line, the 
ETACS-ECU sends a diagnosis code when the scan tool 
(MUT-III) is connected.
NOTE: 

*1

: For vehicles that do not have a sunroof, the diagno-

sis code is always sent but it does not indicate a problem.
NOTE: 

*2

: The diagnosis code for the current problem is not 

sent.
NOTE: 

*3

: For vehicles that do not have a multi center display 

(middle grade type), the diagnosis code is always sent but it 
does not indicate a problem.

CODE NUMBER

TROUBLE CONTENT

001

Malfunction of SWS communication line 
or ETACS-ECU

002

Malfunction of column switch

003

Malfunction of front-ECU

004

*1

Malfunction of sunroof-ECU

010

*2

Bus Off

011

Powertrain control module time-out 
(related to engine)

012

Powertrain control module time-out 
(related to A/T)

013

A/C-ECU time-out

014

Combination meter time-out

015

*3

Multi center display unit (middle-grade 
type) time-out

021

Failure information on combination 
meter

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

DIAGNOSTIC FUNCTION

SIMPLIFIED WIRING SYSTEM (SWS)

54B-9

SWS INPUT SIGNAL CHECK BY SCAN 
TOOL

While performing a "Pulse Check" with the MUT-III, 
the computer buzzer will sound when the switches 
shown in the table below are operated.

INPUT SIGNALS THAT CAN BE CHECKED

INPUT SIGNAL

CONDITION FOR SOUNDING TONE 
ALARM 

Ignition switch (ACC)

Turn from "LOCK" (OFF) to "ACC" position

Ignition switch (IG1)

Turn from "ACC" to "ON" position

Key reminder switch

Remove the ignition key from ignition key 
cylinder (form inserted position)

Hazard warning light switch

Turn from OFF to ON

Fog light switch
Driver’s, front passenger’s or rear door switch

Open the door

Door lock key cylinder switch

Turn the key to the lock or unlock position

Driver's or front passenger’s door lock actuator switch

Move the door lock knob from lock position to 
unlock position

Door lock switch (incorporated in power window main switch 
and power window sub switch)

Press "LOCK" or "UNLOCK" side

Trunk lid latch assembly

Open the trunk

Column 
switch

Taillight switch

When the lighting switch is turned from one 
position to the taillight position

Headlight switch

When the lighting switch is turned from one 
position to the headlight position

Dimmer switch

When the switch is turned from the OFF to 
the ON position

Passing switch
Turn signal light LH switch
Turn signal light RH switch
Windshield mist wiper switch
Windshield intermittent wiper switch
Windshield low speed wiper switch
Windshield high speed wiper switch
Variable intermittent wiper control switch

When turned from FAST to SLOW ( A pulse 
is output around the center)

Windshield washer switch

When the switch is turned from the OFF to 
the ON position

Interior light loaded signal

Illuminates the interior lights

ECU FUNCTIONS AND CONTROLS IN THE SWS

SIMPLIFIED WIRING SYSTEM (SWS)

54B-10

ECU FUNCTIONS AND CONTROLS IN THE SWS

M2541004000269

The SWS has the following functions and system 
controls:

FUNCTION

CONTROL ECU

FUNCTION 
DESCRIPTION

Tone alarm

Ignition key reminder tone alarm 
function

ETACS-ECU

P.54B-11

Light reminder tone alarm function

ETACS-ECU, column 
switch

P.54B-11

Seat belt tone alarm function

ETACS-ECU

P.54B-11

Door ajar warning buzzer

ETACS-ECU

P.54B-13

Multi center display operation tone 
<vehicles with multi center display 
(middle grade type)>

ETACS-ECU

P.54B-14

Turn-signal light buzzer

ETACS-ECU, column 
switch

P.54B-14

Central door locking 
system

Door unlocking by operating the 
driver’s door lock key cylinder

ETACS-ECU

P.54B-14

Door locking or unlocking by operating 
the driver’s or front passenger’s door 
lock switch

P.54B-14

Reminder preventing key from being 
left in ignition

P.54B-15

Power window

Power window timer function

ETACS-ECU

P.54B-16

Keyless entry system

Keyless entry hazard answerback 
function

ETACS-ECU

P.54B-17

Keyless entry horn answerback 
function

P.54B-17

Trunk unlock function

P.54B-17

Timed locking mechanism

P.54B-17

Sunroof

Sunroof timer function

ETACS-ECU, 
sunroof-ECU

P.54B-17

Windshield wiper and 
washer

Intermittent control (Vehicle 
speed-dependent variable type)

ETACS-ECU, front-ECU, 
column switch

P.54B-18

Mist wiper control

P.54B-18

Low speed wiper, high speed wiper 
control

P.54B-19

Washer control

P.54B-19

Headlights and taillights

Taillights

ETACS-ECU, front-ECU, 
column switch

P.54B-21

Headlights 

P.54B-21

Headlight automatic-shutoff function

P.54B-21

High-beam indicator

P.54B-22

Daytime running light function

P.54B-22