Mitsubishi Galant (2004+). Manual - part 311

 

  Index      Mitsubishi     Mitsubishi Galant - service repair manual 2004 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  309  310  311  312   ..

 

 

Mitsubishi Galant (2004+). Manual - part 311

 

 

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-435

.

CIRCUIT OPERATION
The ETACS-ECU operates the dome light according 
to the following signals:

• Ignition switch (IG1): ON or OFF

• Key reminder switch: ON or OFF

• Door switches: ON or OFF

• Driver’s door lock actuator switch: ON or OFF

• Interior light loaded signal: ON

.

TECHNICAL DESCRIPTION (COMMENT)
If the dome light does not illuminate normally, a 
burned-out dome light bulb, the input circuits from 
the switches described in "CIRCUIT OPERATION", 
the power supply line to the switches or the 
ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• Trouble in input signal system

• 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

• MB991813: SWS Monitor Kit

• MB991806: SWS Monitor Cartridge

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

• MB991822: Probe Harness

AC305415

CONNECTOR: C-205

AM

AC305413AB

CONNECTOR: C-219

JUNCTION BLOCK

(REAR VIEW)

AC305264

AC305264

CONNECTORS: D-02, D-03

D-02
D-03

AH

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-436

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 "LOCK" (OFF) position.
(3) Operate 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

."

AC305411AB

MB991910

DATA LINK

CONNECTOR

MB991827

MB991824

MB991806

MB991812

AC302210

COLUMN SWITCH 
CONNECTOR

COLUMN SWITCH 
CONNECTOR AT 
HARNESS SIDE 

MB991812

AB

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-437

STEP 2. Check the input signal by using "DATA LIST" 
menu of the SWS monitor.

Check the input signals from the following switches:

• Ignition switch: ON or START

• Driver’s or front passenger’s door: open

(1) Operate scan tool MB991958 according to the procedure 

below to display "ETACS ECU."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Data List."
f. Select "ETACS ECU."

(2) Check that normal conditions are displayed for the items 

described in the table below.

Q: Does the scan tool MB991958 display the items "IG SW 

(IG1)" and "FRONT DOOR SW" as normal condition?
Normal conditions are displayed for all the items : 
Go to 

Step 3.

Normal condition is not displayed for "IG SW (IG1)" : 

Refer to Inspection Procedure M-2 "ETACS-ECU 
does not receive any signal from the ignition switch 
(IG1) 

P.54B-490

."

Normal condition is not displayed for "FRONT DOOR 
SW" : 
Refer to Inspection Procedure M-4 "ETACS-ECU 

does not receive any signal from the front door 
switches 

P.54B-497

."

ITEM NO.

ITEM NAME

NORMAL CONDITION

ITEM 30

IG SW (IG1)

ON

ITEM 32

FRONT DOOR SW

ON

AC305411AB

MB991910

DATA LINK

CONNECTOR

MB991827

MB991824

MB991806

MB991812

AC302210

COLUMN SWITCH 
CONNECTOR

COLUMN SWITCH 
CONNECTOR AT 
HARNESS SIDE 

MB991812

AB

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-438

STEP 3. Check the input signal (by using the pulse check 
mode of the monitor).

Check the following switches and input signals:

• Key reminder switch

• Interior light loaded signal

• Door switches

(1) Operate scan tool MB991958 according to the procedure 

below to display "Pulse check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "Pulse Checking."

(2) Check if scan tool MB991958 sounds or not.

Q: When the key reminder switch, any door switch or 

interior light is operated, does scan tool MB991958 
sound?
Buzzer of scan tool MB991958 sounds normally. : 
Go to 

Step 4.

Scan tool MB991958 does not sound when the ignition 
key is removed and reinserted : 
Refer to Inspection 

Procedure N-1 "ETACS-ECU does not receive any 
signal from the key reminder switch 

P.54B-518

."

When one of the interior lights is illuminated, scan tool 
MB991958 does not sound : 
Refer to Inspection 

Procedure N-9 "ETACS-ECU does not receive any 
interior light loaded signal 

P.54B-565

."

When one of the doors is opened and closed, scan tool 
MB991958 does not sound : 
Refer to Inspection 

Procedure N-3 "ETACS-ECU does not receive any 
signal from any of the door switches 

P.54B-527

."

ITEM NAME

CONDITION

key reminder switch

Remove and reinsert the ignition 
key

interior light loaded signal Turn on one of the interior lights

door switches

Open or close one of the doors

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

 

 

 

 

 

 

 

Content   ..  309  310  311  312   ..