Mitsubishi Galant (2004+). Manual - part 326

 

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Mitsubishi Galant (2004+). Manual - part 326

 

 

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-495

STEP 3. Check the ground circuit to the fog light switch. 
Measure the resistance at fog light switch connector 
C-128.

(1) Disconnect fog light switch connector C-128 and measure 

the resistance available at the wiring harness side of the 
connector.

(2) Measure the resistance value between terminal 2 and 

ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 5.
NO :  Go to Step 4.

STEP 4. Check the wiring harness between fog light switch 
connector C-128 (terminal 2) and ground.

Q: Is the wiring harness between fog light switch 

connector C-128 (terminal 2) and ground in good 
condition?
YES : 
No action is necessary and testing is complete.
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 fog light 
switch operates normally, a correct signal is sent from 
the fog light switch.

STEP 5. 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 6.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. If the fog light switch operates normally, a 

correct signal is sent from the fog light switch.

AC305231

AC305231

HARNESS SIDE

CONNECTOR: C-128

BS

1

2

4

5

3

6

AC210169

CONNECTOR C-128
(HARNESS SIDE)

AC

AC305231

AC305231

HARNESS SIDE

CONNECTOR: C-128

BS

AC305413AN

CONNECTOR: C-218

JUNCTION BLOCK
(REAR VIEW)

C-218 (GR)

HARNESS SIDE

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52

53

54

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INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-496

STEP 6. Check the wiring harness between fog light switch 
connector C-128 (terminal 1) and ETACS-ECU connector 
C-218 (terminal 54).

Q: Is the wiring harness between fog light switch 

connector C-128 (terminal 1) and ETACS-ECU connector 
C-218 (terminal 54) in good condition?
YES : 
Replace the ETACS-ECU. If the fog light switch 

operates normally, a correct signal is sent from the 
fog light switch.

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 fog light 
switch operates normally, a correct signal is sent from 
the fog light switch.

AC305231

AC305231

HARNESS SIDE

CONNECTOR: C-128

BS

AC305413AN

CONNECTOR: C-218

JUNCTION BLOCK
(REAR VIEW)

C-218 (GR)

HARNESS SIDE

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52

53

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INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-497

INSPECTION PROCEDURE M-4: ETACS-ECU does not receive any signal from the front door 
switches.

.

JUNCTION 
BLOCK

ETACS-
ECU

JUNCTION BLOCK SIDE

FRONT DOOR 
SWITCH (LH)

FRONT DOOR 
SWITCH (RH)

Front Door Switches Input Circuit

AC305233

CONNECTOR: C-13

AR

AC305415AL

CONNECTOR: C-204

JUNCTION BLOCK

(FRONT VIEW)

AC305413AB

CONNECTOR: C-219

JUNCTION BLOCK

(REAR VIEW)

AC305268

CONNECTORS: D-22, D-34

AM

D-22

D-34

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-498

CIRCUIT OPERATION
The ETACS-ECU operates the following functions or 
systems according to signal from the front door 
switches:

• Ignition key reminder tone alarm function <front 

door switch (LH)>

• Light reminder tone alarm function <front door 

switch (LH)>

• Door ajar warning buzzer

• Forgotten key reminder

• Power window timer function

• Sunroof timer function <front door switch (LH)>

• Keyless entry system

• Timed locking mechanism

• Headlight automatic shutdown function <front 

door switch (LH)>

• Dome light

• Interior light automatic-shutdown function

• Ignition key hole illumination light <front door 

switch (LH)>

• Door-ajar indicator light

.

TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the functions or systems 
described in "CIRCUIT OPERATION" do not work 
normally. If the signal is not normal, the front door 
switches or the ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The front door switches may be defective

• The wiring harness or connectors may have 

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

• 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

 

 

 

 

 

 

 

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