Mitsubishi Galant (2004+). Manual - part 247

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-179

IGNITION
SWITCH (IG1)

ETACS-
ECU

POWER
WINDOW
RELAY

FUSIBLE
LINK

5

RELAY 
BOX
(FUSE     )

FRONT
DOOR 
SWITCH

(LH)

FRONT
DOOR 
SWITCH

(RH)

FRONT
POWER 
WINDOW
SUB 
SWITCH

(RH)

FRONT DOOR WINDOW
REGULATOR MOTOR 

(LH)

FRONT DOOR WINDOW
REGULATOR MOTOR 

(RH)

REAR DOOR WINDOW
REGULATOR MOTOR

(LH)

REAR DOOR WINDOW
REGULATOR MOTOR

(RH)

REAR
POWER 
WINDOW
SUB 
SWITCH

(LH)

REAR
POWER 
WINDOW
SUB 
SWITCH

(RH)

DATA LINK
CONNECTOR

POWER WINDOW MAIN SWITCH

22

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-180

INSPECTION PROCEDURE D-1: Power Windows: Power windows do not work at all.

NOTE: This troubleshooting procedure requires use 
of scan tool MB991958 and SWS monitor kit 
MB991813. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor 

P.54B-15

."

5

FUSIBLE LINK

FRONT DOOR 
WINDOW
REGULATOR
MOTOR 

(RH)

FRONT DOOR 
WINDOW
REGULATOR
MOTOR 

(LH)

REAR DOOR 
WINDOW
REGULATOR
MOTOR 

(LH)

REAR DOOR 
WINDOW
REGULATOR
MOTOR 

(RH)

POWER WINDOW
MAIN SWITCH

ETACS-
ECU

JUNCTION
BLOCK SIDE

POWER
WINDOW
RELAY

Power Window Relay Circuit

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-181

.

CIRCUIT OPERATION
The ETACS-ECU turns on the power window relay 
(installed on the junction block) to activate the power 
windows when the ignition switch (IG1) is turned to 
the "ON" position.

.

TROUBLESHOOTING HINTS

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

• The power window relay may be defective

• The power window main switch may be defective

• The ETACS-ECU may be defective

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• 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

• MB991813: SWS Monitor Kit

• MB991806: SWS Monitor Cartridge

• MB991812: SWS Monitor Harness (For Column-ECU)

• MB991822: Probe Harness

AC305015

FUSIBLE LINK No.5

AC

AC305231AB

CONNECTOR: C-26

AC305415AB

C-212

CONNECTORS: C-203, C-211,C-212,C-215

C-203

C-211

C-215

JUNCTION BLOCK

(FRONT VIEW)

AC305413AB

CONNECTOR: C-219

JUNCTION BLOCK

(REAR VIEW)

AC305262AB

CONNECTOR: E-12

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-182

STEP 1. Use scan tool MB991958 to select "ECU COMM 
Check" on the SWS monitor display.

Check the ETACS-ECU.

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. Connect 
special tool MB991910 before connecting special tool 
MB991812. Be sure to connect special tool MB991806 after 
turning on special tool MB991824.
(1) Connect the special tool. Refer to "How to connect SWS 

monitor 

P.54B-13

."

(2) Turn the ignition switch to the "ON" position.
(3) Operate the scan tool MB991958 according to the 

procedure below to display "ECU COMM Check."
a. Select "Interactive Diagnosis."
b. Select "System Select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "ECU COMM Check."

(4) Scan tool MB991958 should show "OK" on the "ECU 

COMM Check" menu for the "ETACS ECU" menu.

Q: Is "OK" displayed for the "ETACS ECU" menu?

YES : Go to Step 2.
NO :  Refer to Inspection Procedure A-3 "Communication 

with the ETACS-ECU is not possible 

P.54B-79

."

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC302210

COLUMN SWITCH 
CONNECTOR

COLUMN SWITCH 
CONNECTOR AT 
HARNESS SIDE 

MB991812

AB