Mitsubishi Galant 9G. Manual - part 104

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-412

STEP 3. Using scan tool MB991958, read the combination
meter diagnostic trouble code.
(1) Check whether a combination meter-related DTC is set.
(2) Turn the ignition switch to the "ON" position.

Check whether the combination meter-related DTC is set.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Diagnose the combination meter. Refer to

P.54A-52

NO : Go to Step 4.

AC305412

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-413

STEP 4. Use scan tool MB991958 to select "ECU COMM
Check" on the SWS monitor display.
Check the ETACS-ECU.

CAUTION

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 SWS monitor. Refer to "How to connect SWS

monitor

P.54B-13

(2) Turn the ignition switch to the "ON" 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 5.
NO : Refer to Inspection Procedure A-3 "Communication

with the ETACS-ECU is not possible

P.54B-78

STEP 5. Replace the combination meter.
(1) Replace the combination meter.
(2) Check that the fog light indicator light illuminates normally.
Q: Is the fog light indicator light operating properly?

YES : No action is necessary and testing is complete.
NO : Replace the ETACS-ECU. Check that the fog light

indicator light illuminates normally.

AC305411AB

MB991910

DATA LINK

CONNECTOR

MB991827

MB991824

MB991806

MB991812

AC302210

COLUMN SWITCH
CONNECTOR

COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE

MB991812

NEXT>>

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-414

54B

INTERIOR LIGHT

GENERAL DESCRIPTION CONCERNING THE INTERIOR LIGHT

M1549021800236

The following ECUs affect the functions and control
of the interior lights.

Interior light control function

The ETACS-ECU controls the interior lights by turn-
ing them on and off in the following way:

• When a door is opened with the ignition switch

off, the interior lights up to a luminance of 100
percent. When a door is closed, the interior lights
dims at a luminance of 65 percent, and goes off
30 seconds later. However if the ignition switch is
turned ON or if a door is locked while the interior
lights is dimming, the dome light will go off at that
point.

• When a door is opened with the ignition switch

ON, the interior lights up at a luminance of 100
percent. When a door is closed, the interior lights
go off.

• When the ignition key is removed with all doors

closed, the interior lights up at a luminance of 100
percent, and goes off 30 seconds later. However
if the ignition key is inserted again or if a door is
locked while the interior lights is lighting, the inte-
rior lights will go off at that point.

• To check keyless entry operations more easily,

the interior lights is flashed once when the doors
are locked. When the doors are unlocked, the
interior lights at a luminance of 100 percent, and
go off 15 seconds later.

NOTE: The dimmer function can be customized on
vehicles equipped with a multi center display (middle
grade type). Refer to

P.54B-555

NOTE: The dotted lines indicate that lighting mode
when the ignition switch is turned ON, door is locked,
or any door is opened during the timer illumination
time.

FUNCTION

CONTROL ECU

Interior light control function

ETACS-ECU

Interior light automatic-shutoff function

ETACS-ECU

Ignition key hole illumination light function

ETACS-ECU

Door ajar indicator

ETACS-ECU

Seat belt indicator

ETACS-ECU

AC101555AF

ACC

LOCK (OFF)

Key removed

ON (Any door is open)

OFF (All doors are closed)

LOCK

OFF

UNLOCK

100

t1: 30 seconds
t2: 15 seconds

Ignition switch

Door switch

Keyless entry system
door lock or unlock signal

Interior light intensity

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SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-415

Interior light automatic-shutoff function

Illuminated interior lights such as the front dome
light, etc. (all lights using the dome light fuse as the
power supply) will automatically go off in the follow-
ing conditions to prevent the battery from discharging
as a result of forgetting to turn off the lights or incom-
plete closing of the door.

• When the ignition switch is turned off and more

than 30 minutes pass with the interior light illumi-
nated, the interior lights will go off automatically.

• When the ignition switch is turned off and one of

the door switches remains open for 30 minutes
continuously, the interior lights will go off auto-
matically.

NOTE: The interior light automatic shutoff function
can be customized on vehicles equipped with a multi
center display (middle grade type). Refer to

P.54B-555

Ignition key hole illumination light function
The ignition key hole illumination light illuminates when the
driver's door is opened with the ignition switch off, and for 30
seconds after the driver's door is closed. It also illuminates for
30 seconds after the ignition key is pulled out. In any case, it
goes out when the ignition switch is turned on.
Door ajar indicator
The combination meter receives the signal sent from the
ETACS-ECU about whether each door is open or closed and
turns the door ajar indicator on and off. While the door ajar indi-
cator is illuminated, the door ajar warning function is activated
and the door ajar indicator flashes 4 times. If the door remains
open even after the 4 warning flashes, the door ajar indicator
will be illuminated again. And when the interior light auto-
matic-shutoff function is activated, the door ajar indicator is
extinguished.

AC210856 AB

ON (Any door is open)

Illuminated

ACC

OFF

Extinguished

Ignition switch

Door switch

Interior light

DOOR

Dome light switch

T1: 30 minutes
T2: Within 30 minutes

OFF (All doors are closed)

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