Mitsubishi Galant (2004+). Manual - part 206

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-15

HOW TO USE SWS MONITOR

M1549020400150

To carry out troubleshooting, operate scan tool 
MB991958 (MUT-III Sub Assembly) as follows.

Interactive

Diagnosis

TIR

Technical Infomation

Retrieval

Tutorial

Maintenance

Power Down

Menu

Function Select Menu

CAN bus diagnosis

MUT-3 Function Select Menu

Special Function

System Select

POWERTRAIN

UNDER CAR

System Check

SRS-AIR BAG

AUTO A/C

ETACS

SWS

BODY

Select system

Drive Recorder

Simulated Vehicle Speed
Output

Actuator Test

SWS

Check Chart For Problem
Symptom

Select function

Self-diagnosis

Pulse Checking

Special Function

Voltmeter

Data List

SWS MONITOR

SWS

BODY

Pulse check

Pulse check

SWS

BODY

Simulated vehicle speed output

Pulse check

L

H

L

-10

0

SWS Ver.  Destination

Item

Value

Ver. 0

Ver. 1

Ver. 2

Ver. 3

PASSENGER CAR

MMMA PRODUCTS (GALANT, ECLIPSE)

MINI CARS

SWS monitor

SWS monitor

SWS

BODY

Check SWS version and destination and press "OK" button.

SWS Ver.

SWS Destination

1

NAS

SWS Ver. List

Item

Information

AC207214

Maintenance

Meter

Diplay

Resistor

Start-up the MUT-III system.

Select "Interactive Diagnosis"

Select "System Select".

Select "SWS" from the "BODY" tab.

For the SWS monitor, select
"SWS MONITOR".

For the pulse check, select
"Pulse Checking".

Confirm the SWS version and destination

AB

To next page

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-16

SWS monitor

ECU COMM Check

Function Diag.

SWS Ver.:1/SWS Destination:NAS

SWS

BODY

SWS monitor

Drive Recorder

Data List

SWS monitor

FCU COMM Check

SWS monitor

SWS

The number of item choices:4/4ECU, Group ECU COMM Check

The ECU which has been chosen

Name

Info.

No.

80

83

84

86

COLUMN ECU

ETACS ECU

FRONT ECU

SUNROOF ECU

The ECU which has been chosen

Name

Info.

No.

SWS monitor

ECU COMM Check

ECU COMM Check

Value

OK

OK

OK

OFF

-120

-100

-80

-60

-40

-20

0

-120

-100

-80

-60

-40

-20

0

-120

-100

-80

-60

-40

-20

0

-120

-100

-80

-60

-40

-20

0

ON

OFF

ON

OFF

ON

OFF

ON

OK

Graph

Info.

No.

80

83

84

86

Name

COLUMN ECU

ETACS ECU

FRONT ECU

SUNROOF ECU

"OK":Operating, "NG":Not operating or not installed.

SWS monitor

SWS

SWS Ver.:x/SWS Destinatino:NAS

SWS monitor

Data List

SWS monitor

SWS

Select an ECU.Choose the Select Item button, when you set up the display items. 

ECU List

ECU

Info.

No.

1

COLUM ECU

2

ETACS

3

Front-ECU, P/W, S/R

SWS monitor

Data List

Data List Reference Table

Value

OFF

OFF

OFF

OFF

-120

-100

-80

-60

-40

-20

0

-120

-100

-80

-60

-40

-20

0

-120

-100

-80

-60

-40

-20

0

-120

-100

-80

-60

-40

-20

0

ON

OFF

ON

OFF

ON

OFF

ON

OFF

Graph

Info.

No.

02

09

00

07

Name

DIMMER SW

FRONT WASH.SW

HEADLIGHT SW

HI WIPERSW

SWS monitor

SWS

SWS Ver.:x/SWS Destinatino:NAS

SWS monitor

Function Diag.

SWS monitor

SWS

Select Function.

Function Diag. List

Function

Info.

No.

1

WIPER

2

REAR WIPER

3

LIGHTING

4

TURN SIGNAL

5

BUZZER

SWS monitor

Function Diag.

SWS monitor

SWS

Select a detail function. Press Select Item button to set up the items.

Detail Function Diag. List

Detail Function

Info.

No.

1

F.WIPER INT

2

F.WIPER LO

3

F.WIPER HI

4

F.WIPER WASH

5

F.WIPER MIST

SWS monitor

Function Diag.

Highlighted No. doesn't meet operational requirements.

SWS monitor

SWS

SWS Ver.:x/SWS Destinatino:NAS

WIPER/F.WIPER HI

Value

OFF

OFF

OFF

OFF

-120

-100

-80

-60

-40

-20

0

-120

-100

-80

-60

-40

-20

0

-120

-100

-80

-60

-40

-20

0

-120

-100

-80

-60

-40

-20

0

ON

OFF

ON

OFF

ON

OFF

ON

OFF

Graph

Info.

No.

09

07

05

06

Name

FRONT WASH.SW
(COLUMN ECU)

HI WIPERSW
(COLUMN ECU)

INT WIPERSW
(COLUMN ECU)

LO WIPERSW
(COLUMN ECU)

AC207215

For the data list, select 
"Data List".

From previous page

For the ECU comm check, select 
"ECU COMM Check".

For the function diagnosis, select 
"Function Diag".

Press the "OK" button.

Select the ECU, and then press 
the "OK" button.

Select the desired item from "Function
and then press the "OK" button.

Select the desired function from "Deta
Function", and then press the 
"OK" button.

AB

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-17

HOW TO CHECK ECUs

M1549014900361

1. Use the scan tool MB991958 (MUT-III Sub 

Assembly) and the SWS monitor kit to check 
ECUs.

2. The following ECUs can be checked by using the 

scan tool MB991958 (MUT-III Sub Assembly) and 
the SWS monitor kit.

NOTE:  The "ECU COMM Check" function checks 
the communication status of ECUs. "NG" does not 
always mean ECU malfunction. If a malfunction is 
found by the "ECU COMM Check", proceed to 
"Symptom Procedure" (Refer to 

P.54B-59

).

SWS monitor kit-compatible ECUs and their conditions

NOTE: 

.

•

*

1

: If the ignition switch is turned to "LOCK" (OFF) 

or "ACC" when "NG" is displayed beside "ETACS 
ECU" or the signal request line is abnormal, the 
scan tool shows "NG" beside the "COLUMN 
ECU".

•

*

2

: When "NG" is displayed beside "ETACS 

ECU", the scan tool shows "NG" beside the 
"FRONT ECU" and "SUNROOF ECU".

SERVICE DATA CHECK

M1549015000383

Use the scan tool MB991958 (MUT-III Sub 

Assembly) and the SWS monitor kit to check 
"Data List" or "Function Diag.". This "Data List" or 
"Function Diag." check is applicable for signals, 
which are transmitted and received through the 
SWS communication line. For input signals, which 
are not compatible with the SWS monitor kit, refer 
to the Pulse Check procedure (by using the scan 
tool or voltmeter) 

P.54B-26

.

1. The following input signals can be checked by 

using the scan tool MB991958 (MUT-III Sub 
Assembly) and the SWS monitor kit.
NOTE:  If a problem is found in the "Service Data" 
check, refer to Input Signal Chart 

P.54B-63

.

ITEM 
No.

ECUS TO BE 
CHECKED

DISPLAY ON 
SCAN TOOL

NORMAL 
CONDITI
ON

ECU CONDITION

80

Column switch 
(column-ECU)

COLUMN ECU

OK*

1

All of the column switch, power supply, 
ground and interconnecting 
communication lines are normal

83

ETACS-ECU

ETACS-ECU

OK

All of the ETACS-ECU switch, power 
supply, ground and interconnecting 
communication lines are normal

84

Front-ECU

FRONT ECU

OK*

2

All of the front-ECU, power supply, ground 
and interconnecting communication lines 
are normal

86

Sunroof motor 
assembly 
(sunroof-ECU)

SUNROOF ECU

OK*

2

All of the sunroof motor assembly, power 
supply, ground and interconnecting 
communication lines are normal

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-18

<DATA LIST REFERENCE TABLE>

The table below shows the service data and their 
normal condition, which are displayed during the 
"Data List."

.

COLUMN ECU

.

CHECK 
ITEM

ITEM NO. DISPLAY ON 

SCAN TOOL

CHECK CONDITION

NORMAL 
CONDITION

Dimmer 
switch

02

DIMMER SW

Dimmer switch: ON

ON

Dimmer switch: OFF

OFF

Windshield 
washer 
switch

09

FRONT 
WASH.SW

Windshield washer switch: ON

ON

Windshield washer switch: OFF

OFF

Headlight 
switch

00

HEADLIGHT 
SW

Lighting switch: HEAD

ON

Lighting switch: Other than HEAD

OFF

Windshield 
high-speed 
wiper switch

07

HI WIPER SW

Wiper switch: HI

ON

Wiper switch: Other than HI

OFF

With or 
without 
windshield 
intermittent 
wiper interval 
adjusting 
knob

15

INT WIPE 
KNOB

Vehicles with intermittent wiper control

EQUIP

Vehicles without intermittent wiper control

NON

Windshield 
intermittent 
wiper switch

05

INT WIPER SW Wiper switch: INT

ON

Wiper switch: Other than INT

OFF

Windshield 
low-speed 
wiper switch

06

LO WIPER SW Wiper switch: LO

ON

Wiper switch: Other than LO

OFF

Windshield 
mist wiper 
switch

08

MIST WIPER 
SW

Wiper switch: Mist

ON

Wiper switch: Other than "Mist" position

OFF

Passing light 
switch

03

PASSING SW

Passing light switch: ON

ON

Passing light switch: OFF

OFF

Tail light 
switch

01

TAILLIGHT SW Lighting switch: TAIL

ON

Lighting switch: OFF

OFF

Turn-signal 
light switch 
(LH)

11

T/S LH SW

Turn-signal light switch: LH

ON

Turn-signal light switch: Other than LH

OFF

Turn-signal 
light switch 
(RH)

10

T/S RH SW

Turn-signal light switch: RH

ON

Turn-signal light switch: Other than RH

OFF