Mitsubishi Galant (2004+). Manual - part 204

SPECIAL TOOL

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-7

SPECIAL TOOL

M1549000300612

TOOL

TOOL NUMBER 
AND NAME

SUPERSESSION

APPLICATION

MB991958

A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991914
F: MB991825
G: MB991826

MUT-III sub 
assembly

A: Vehicle 

communication 
interface (V.C.I.)

B: MUT-III USB 

cable

C: MUT-III main 

harness a 
(vehicles with 
CAN 
communication 
system)

D: MUT-III Main 

Harness B 
(Vehicles without 
CAN 
communication 
system)

E: MUT-III main 

harness C (for 
daimler chrysler 
models only)

F: MUT-III 

measurement 
adapter

G: MUT-III trigger 

harness

MB991824-KIT
NOTE: G: MB991826 
MUT-III Trigger 
Harness is not 
necessary when 
pushing V.C.I. ENTER 
key.

SWS communication line check 
(ECU check and service data)

CAUTION

For vehicles with CAN 
communication, use MUT-III 
main harness A to send 
simulated vehicle speed. If you 
connect MUT-III main harness B 
instead, the CAN 
communication does not 
function correctly.

MB991910

MB991826

MB991958

MB991911

MB991914

MB991824

MB991827

MB991825

DO NOT USE

A

B

C

D

E

F

G

DO NOT USE

SPECIAL TOOL

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-8

MB991813

A: MB991806
B: MB991812
C: MB991822

SWS monitor kit

A: SWS monitor 

cartridge

B: SWS monitor 

harness (for 
column-ECU)

C: Probe harness

-

SWS communication line check 
(ECU check and service data)

MB991529
Diagnostic trouble 
code check harness

Tool not necessary if 
the scan tool (MUT-III) 
is available

Checking input signal when using 
a voltmeter

MB991223

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

Harness set

A: test harness
B: LED harness
C: LED harness 

adaptor

D: Probe

General service tools Making voltage and resistance 

measurement during 
troubleshooting

A: Connector pin contact 

pressure inspection

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

TOOL

TOOL NUMBER 
AND NAME

SUPERSESSION

APPLICATION

B991862

A

B

C

MB991529

MB991223

A

D

C

B

AD

SWS DIAGNOSIS

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-9

SWS DIAGNOSIS

GENERAL DESCRIPTION

BEFORE CARRYING OUT TROUBLESHOOTING

M1549014700408

 Before carrying out troubleshooting, check the fol-
lowing two items.

•  Make sure that the ETACS-ECU, the junction 

block (J/B), the front-ECU and the engine com-
partment relay box are connected securely.

•  Make sure that fuses and fusible links related to 

relevant systems are not blown.

DIAGNOSTIC FUNCTION

M1549028900096

ON-BOARD DIAGNOSTICS

If an error occurs in the ECU or the SWS or CAN 
communication line which performs the SWS or CAN 
communication, the DTC is memorized in 
ETACS-ECU. The DTCs have 11 items. The DTCs 
are checked to connect scan tool MB991958 
(MUT-III sub assembly). The memorized DTCs are 
not erased even if the ignition switch is turned to the 
LOCK (OFF) position. The DTCs are erased to oper-
ate scan tool MB991958 (MUT-III sub assembly).

NOTE: 

*1

: For vehicles that do not have a sunroof, 

the diagnosis code is always sent but it does not indi-
cate a problem.
NOTE: 

*2

: The diagnosis code for the current prob-

lem is not sent.
NOTE: 

*3

: For vehicles that do not have a multi cen-

ter 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

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-10

HOW TO CONNECT THE SCAN TOOL (MUT-III)

Required Special Tools:

•  MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
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 MB991910 to special tool MB991824.
5. Connect special tool MB991910 to the data link connector.
6. 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.

7. Start the MUT-III system on the personal computer.
NOTE: Disconnecting scan tool MB991958 is the reverse of the 
connecting sequence, making sure that the ignition switch is at 
the "LOCK" (OFF) position.

HOW TO READ AND ERASE DIAGNOSTIC 
TROUBLE CODES

Required Special Tools:

•  MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827