Mitsubishi Galant (2004+). Manual - part 328

INPUT SIGNAL PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-503

STEP 10. Check ETACS-ECU connector C-218 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector. 

Q: Is ETACS-ECU connector C-218 in good condition?

YES : Go to Step 11.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. If the functions described in "CIRCUIT 

OPERATION" work normally, the input signal from the 
front door switch (RH) should be normal.

STEP 11. Check the wiring harness between front door 
switch (RH) connector D-34 (terminal 1) and ETACS-ECU 

connector C-218 (terminal 65).

AC305413AN

CONNECTOR: C-218

JUNCTION BLOCK
(REAR VIEW)

C-218 (GR)

HARNESS SIDE

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AC305413AN

CONNECTOR: C-218

JUNCTION BLOCK
(REAR VIEW)

C-218 (GR)

HARNESS SIDE

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AC305264

HARNESS SIDE

CONNECTOR: D-34

AJ

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-504

NOTE: Also check intermediate connector C-13 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate connector C-13 is damaged, repair or 
replace the connector as described in GROUP 00E, Harness 
Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between front door switch (RH) 

connector D-34 (terminal 1) and ETACS-ECU connector 
C-218 (terminal 65) in good condition?
YES : Replace the ETACS-ECU. If the functions described 

in "CIRCUIT OPERATION" work normally, the input 
signal from the front door switch (RH) should be 
normal.

NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. If the 
functions described in "CIRCUIT OPERATION" work 
normally, the input signal from the front door switch 
(RH) should be normal.

AC305233 AC

CONNECTOR: C-13

INPUT SIGNAL PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-505

INSPECTION PROCEDURE M-5: Column Switch: ETACS-ECU does not receive any signal from the 
taillight switch, the headlight switch, the passing light switch, the dimmer switch or the turn-signal 
light switch.

NOTE: This troubleshooting procedure requires the 
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

."

.

CIRCUIT OPERATION
The ETACS-ECU operates the following equipment 
or functions according to signal from the column 
switch (turn-signal light and lighting switch):

• Light reminder tone alarm function

• Turn-signal light buzzer

• Headlight

• Turn-signal light

• High-beam indicator

• Turn signal indicators

.

TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the equipment or functions 
described in "CIRCUIT OPERATION" do not work 
normally. If the signal is not normal, the column 
switch (turn-signal light and lighting switch) or the 
ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The column switch (turn-signal light and lighting 

switch) may be defective

• The ETACS-ECU may be defective

Turn-signal Light and Lighting Switch Input Circuit

AC004262

INPUT SIGNAL PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-506

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