Mitsubishi Galant 9G. Manual - part 5

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 
"Detail Function", and then press 
the "OK" button.

AB

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-17

HOW TO CHECK ECUS

M1549014900640

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

M1549015000714

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

.

<DATA LIST REFERENCE TABLE>

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

.

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

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

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-19

ETACS

NOTE:  For item No.43, the scan tool MB991958 
(MUT-III Sub Assembly) also displays "ON" when the 
light reminder tone alarm or the seat belt tone alarm 
function is triggered.

.

CHECK 
ITEM

ITEM NO. DISPLAY ON 

SCAN TOOL

CHECK CONDITION

NORMAL 
CONDITION

Tone alarm

43

BUZZER

1.  Ignition switch: LOCK (OFF)
2.  Key reminder switch: ON
3.  Front door switch: ON (front door open)

ON

When requirements for sounding each 
warning tone alarm are not satisfied

OFF

Front fog 
lights

36

F.FOG LIGHT

1.  Lighting switch: HEAD
2.  Fog light switch: ON

ON

Other than the condition above

OFF

Driver’s door 
switch

32

FRONT DOOR 
SW

Driver’s door switch and Front passenger’s 
door switch is on 

ON

Driver’s door switch and Front passenger’s 
door switch is off

OFF

Headlight 
automatic 
shutoff 
function

35

H/L AUTO-CUT 1.  Lighting switch: Other than OFF

2.  Ignition switch: from ON or START to 

LOCK (OFF) or ACC

3.  Front door switch: ON (front door open)

 OFF to ON (after 
approximately one 
second)

When requirements for the headlight 
automatic shutoff are not satisfied

OFF

Ignition 
switch (ACC)

31

IG SW (ACC)

Ignition switch: ACC or ON

ON

Ignition switch: LOCK (OFF) or START

OFF

Ignition 
switch (IG1)

30

IG SW (IG1)

Ignition switch: ON or START

ON

Ignition switch: LOCK (OFF) or ACC

OFF

Windshield 
intermittent 
wiper interval

37

INT WIPE 
TIME

1.  Ignition switch: ACC or ON
2.  Operate the intermittent wiper control, 

and change the wiper interval

The scan tool 
MB991958 
(MUT-III Sub 
Assembly) 
displays 
intermittent wiper 
interval in 
response to the 
intermittent wiper 
control positions.