Mitsubishi Montero (2004+). Manual - part 688

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-9

SWS communication line connecting method <SWS 
monitor harness (for column-ECU)>
1. Ensure that the ignition switch is at the "LOCK" (OFF) 

position.

2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824 

and the personal computer.

4. Connect special tool MB991911 to special tool MB991824.
5. Connect special tool MB991911 to the data link connector.

6. Remove the steering column cover.
7. Remove the steering column switch connector.
8. Connect special tool MB991812 to column switch connector.

9. Connect special tool MB991812 to special tool MB991806.
10.Connect special tool MB991806 to special tool MB991824.
11.Turn the power switch of special tool MB991824 to the "ON" 

position.
NOTE: When special tool MB991824 is energized, special 
tool MB991824 indicator light will be illuminated in a green 
color.

12.Start the MUT-III system on the personal computer.

AC307591 AB

MB991911

DATA LINK

CONNECTOR

MB991824

MB991827

AC102200

COLUMN SWITCH 
CONNECTOR

COLUMN SWITCH 
CONNECTOR AT
HARNESS SIDE

SWS MONITOR 
HARNESS (FOR 
COLUMN-ECU)

AB

AC208681

MB991806

AC

MB991812

MB991824

MB991911

MB991827

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-10

HOW TO USE SWS MONITOR

M1549020400235

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

Drive Recorder

Simulated Vehicle Speed
Output

Actuator T

Actuator Test

est

SWS

Check Chart For Problem
Symptom

Select function

Self-diagnosis

Pulse Checking

Special Function

Voltmeter

Data List

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-11

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-12

HOW TO CHECK ECUs

M1549014900424

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

Assembly) and the SWS monitor kit to check 
ECUs. (Refer to MUT-III Operating Instructions)

2. The following ECUs can be checked by using the 

scan tool and the SWS monitor kit.

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

P.54B-22

).

SWS monitor kit-compatible ECUs and their conditions

NOTE: 

.

•

*

1

: If the ignition switch is turned to the "LOCK" 

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

•

*

2

: When "NG" is displayed beside the "ETACS 

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

•

*

3

: If "NG" is displayed beside the "COLUMN 

ECU," "NG" is displayed on the "CENTER DISP."

SERVICE DATA CHECK

M1549015000446

1. Use the scan tool and the SWS monitor kit to 

check "Service Data."
This "Service Data" 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-21

.

2. The following input signals can be checked by 

using the scan tool and the SWS monitor kit.
NOTE: If a problem is found in the "Service Data" 
check, refer to the Problems during Input Signal 
Check <SWS monitor>. (Refer to 

P.54B-500

.)

ECUs TO BE CHECKED

DISPLAY ON SCAN 
TOOL

NORMAL 
CONDITION

ECU CONDITION

Column switch 
(column-ECU)

COLUMN ECU

OK*

1

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

ETACS-ECU

ETACS ECU

OK

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

Front-ECU

FRONT ECU

OK*

2

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

Sunroof motor assembly 
(sunroof-ECU)

SUNROOF ECU

OK*

2

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

RV meter

CENTER DISP.

OK*

3

All of the RV meter, power supply, 
ground and interconnecting 
communication line are normal

Other SWS-related ECUs

Other ECUs

NG

ECUs are not used