Mitsubishi Galant (2004+). Manual - part 228

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-103

TONE ALARM

GENERAL DESCRIPTION CONCERNING THE TONE ALARM

M1549021000155

The tone alarm functions are as follows. These func-
tions are controlled by relevant ECUs.

Ignition key reminder tone alarm function
When the driver’s door is opened with the ignition key inserted 
in the ignition key cylinder (ignition switch is in the OFF posi-
tion,) the tone alarm sounds intermittently to indicate that the 
ignition key has not been removed.

Light reminder tone alarm function
When the taillights or headlights is the ON position, if the igni-
tion key is removed and the driver's door is opened, a tone 
alarm will sound continuously to warn that the lights are on. 
However, if the taillights or headlights have been turned off by 
the headlight automatic-shutoff function, the tone alarm will not 
sound.

FUNCTION

CONTROL ECU

Ignition key reminder tone alarm function

ETACS-ECU

Light reminder tone alarm function

ETACS-ECU, column switch

Seat belt tone alarm function

ETACS-ECU

Door ajar warning buzzer

ETACS-ECU

Center display operation tone <vehicles with multi center 
display (middle-grade type)>

ETACS-ECU

Turn-signal light buzzer

ETACS-ECU, column switch

AC005427AB

ON

OFF

ON

 (Key removed)

OFF

 (Key inserted)

ON (Open)

OFF (Closed)

ON (Tone alarm 

sounds)

OFF (Tone alarm 

does not sound)

Ignition switch
(IG1)

Key 
reminder 
switch

Driver's
door
switch

Ignition key 
inserted 
reminder 
tone alarm 
output

AC005428

AB

ON

OFF

ON 

(Key removed)

OFF 

(Key inserted)

ON (Open)

OFF (Closed)

ON (Tone alarn 

sounds)

OFF (Tone alarm 

does not sound)

Tail light or 
headlight

Key 
reminder 
switch

Driver's
door
switch

Light 
reminder 
tone
alarm output

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-104

Seat belt tone alarm function

AC305326 AC

ON

OFF

ON (UNFASTENED)

OFF (FASTENED)

ON (TONE ALARM SOUNDS)

OFF (TONE ALARM DOES 

NOT SOUND)

IGNITION SWITCH (IG1)

SEAT BELT 
TONE ALARM 
OUTPUT

T

T

T

T

T

T: 6 SECONDS

T1: 1 SECOND

T

T1

t t t

T1

T1

T1

T1

T1

t1

t: 0.16 SECOND

t1: 0.52 SECOND

SEAT BELT 
TONE ALARM 
OUTPUT

ON (TONE ALARM 

SOUNDS)

OFF (TONE ALARM

DOES NOT SOUND)

SEAT BELT SWITCH
(DRIVER'S SIDE)

T

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-105

If any of the following conditions is met with the igni-
tion switch at "ON" or "ST", the ETACS-ECU sounds 
the tone alarm by using the driver's seat belt switch 
signal and the vehicle speed signal sent from the 
combination meter.

• Sounds the tone alarm for six seconds when the 

ignition switch is turned "ON" with the seat belt 
switch on (the driver's seat belt is not fastened). 
This is called "Timer function".

• Sounds the tone alarm 12 cycles (after 0.5 sec-

onds) if any of the following conditions is met 
when sixty seconds or more have elapsed since 
the ignition switch is turned "ON". One cycle con-
sists of five-second "on" and then three-second 
"off".

a. The vehicle speed has reached 8 km/h (5 

mph) while the seat belt switch is turned on 
(driver's seat belt is not fastened) with the 
ignition switch "ON.

b. The seat belt switch has been turned on 

(driver's seat belt has not been fastened) for 
at least ten seconds while the ignition switch 
has been turned "ON" and the vehicle speed 
has been 8 km/h (5 mph) or more.

NOTE: Once the tone alarm has sounded 12 

cycles, it does not sound again until the vehi-
cle speed reduces to 3 km/h (2 mph) or less 
even if any of the following conditions is met.

• The tone alarm stops sounding if the ignition 

switch or the seat belt switch is turned off (the 
driver's seat belt is fastened) while the timer 
operation is active. 

AC305374

ON

OFF

ON (UNFASTENED)

OFF (FASTENED)

ON (TONE ALARM 

SOUNDS)

IGNITION SWITCH (IG1)

SEAT BELT 
SWITCH
(DRIVER'S SIDE)

SEAT BELT 
TONE ALARM 
OUTPUT

a: 0.5 SECOND

b: 5 SECONDS

c: 3 SECONDS

d: 60 SECONDS  OR MORE

8 km/h (5 mph)

0 km/h (0 mph)

VEHICLE SPEED

d

e: 10 SECONDS

AC

3 km/h (2 mph)

T: 6 SECONDS

T1: 1 SECOND

t: 0.16 SECOND

t1: 0.52 SECOND

b

T1

t t t

T1

T1

T1

T1

t1

SEAT BELT 
TONE ALARM 
OUTPUT

ON (TONE ALARM 

SOUNDS)

OFF (TONE ALARM

DOES NOT SOUND)

OFF (TONE ALARM

DOES NOT SOUND)

T

b

b

c

c

a

a

a

12 CYCLES

1 CYCLE

e

12 CYCLES

12 CYCLES

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-106

Door ajar warning buzzer
The buzzer is sounded 4 times by the ETACS-ECU to warn the 
driver if any door is open when the ignition is switched ON and 
the vehicle speed reaches 8 km/h (5 mph) or faster. The buzzer 
will continue to sound for 4 times even if the ignition, door sta-
tus, or vehicle speed requirements are not maintained.
NOTE: The warning buzzer can be customized on vehicles 
equipped with a multi center display (middle grade type.)  Refer 
to 

P.54B-578

.

Multi center display operation tone <vehicles with multi 
center display (middle-grade type)>
The ETACS-ECU sounds the buzzer when the buzzer signal is 
sent from the center display.

Turn-signal light buzzer
The ETACS-ECU sounds the buzzer in sync with the turn sig-
nal lights or hazard warning lights.
NOTE: The turn-signal light buzzer can be customized on vehi-
cles equipped with a multi center display (middle grade type).  
Refer to 

P.54B-578

.