the powertrain control module, the A/C-ECU, the
SRS-ECU, the combination meter, the ABS-ECU,
and the middle-grade multi center display. These two
communications groups are connected to form a
dedicated network for sending multiplex data.

NOTE: *

ETACS: Electronic Time and Alarm Control

System

NOTE: *

CAN: Controller Area Network

NOTE: *

: For details on CAN, see Group 54C.

OPERATION

M1549013100566

TONE ALARM FUNCTION

TRIP COMPUTER TONE ALARM FUNC-
TION

The ETACS-ECU sounds the buzzer when the
buzzer signal is sent from the combination meter.

LAMP REMINDER TONE ALARM
FUNCTION

When the taillamps or headlamps are ON, if the igni-
tion key is on "OFF" and the driver's door is opened,
a tone alarm will sound continuously to warn that the
lamp is illuminated. However, if the taillamps or
headlamps have been turned off by the headlamp
automatic-shutdown function, the tone alarm will not
sound.

54DB042A

ETACS-ECU

FRONT-ECU

COLUMN SWITCH
(COLUMN-ECU)

SUNROOF-ECU

SWS

CAN

A/T-ECU

ENGINE-ECU

COMBINATION METER

MULTI CENTRE DISPLAY

Single-direction communication
Bidirectional communication

ABS-ECU

SRS-ECU

A/C-ECU

GENERAL DESCRIPTION

SIMPLIFIED WIRING SYSTEM (SWS)

54B-3

SEAT BELT TONE ALARM FUNCTION

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-seconds "on" and then three-seconds
"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 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.

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 igni-
tion is switched ON and the vehicle speed reaches 8
km/h or faster. The buzzer will continue to sound for
4 times even if the ignition, door status, or vehicle
speed requirements are not maintained.

MULTI CENTER DISPLAY OPERATION
TONE

The ETACS-ECU sounds the buzzer when the
buzzer signal is sent from the multi center display.

TURN-SIGNAL LAMP BUZZER

The ETACS-ECU sounds the buzzer in sync with the
turn-signal lamps or hazard warning lamps.

CENTRAL DOOR LOCKING SYSTEM

CENTRAL DOOR LOCKING SYSTEM
OPERATION

Door unlocking by operating the driver’s door lock
key cylinder:

• When the ignition key is inserted in the driver’s

door lock key cylinder and turned clockwise to
unlock the driver’s door, the ETACS-ECU oper-
ates its door unlock relay and passes a current
through the door lock actuator of the driver’s door
for 0.25 seconds to unlock only the driver’s door.

• When the ignition key is turned clockwise again,

the ETACS-ECU operates its door unlock relay
and passes a current through the door lock actu-
ators of all doors for 0.25 seconds and to unlock
all doors.

Door locking or unlocking by operating the driver’s or
front passenger’s door lock switch:

• When the door is locked by the driver’s or front

passenger’s door lock switch, the ETACS-ECU
operates its door lock relay and passes a current
through the door lock actuators of all doors for
0.25 seconds to lock all doors.

• When the door is unlocked by the driver’s or front

passenger's door lock switch, the ETACS-ECU
operates its door unlock relay and passes a cur-
rent through the door lock actuators of all doors
for 0.25 seconds to unlock all doors.

• When the door is locked and unlocked by driver’s

or front passenger's door lock switch consecu-
tively, the ETACS-ECU operates its door lock
relay and passes a current through the door lock
actuators of all doors for 0.25 seconds to lock all
doors. Then, the ETACS-ECU operates its door
unlock relay and passes a current through the
door lock actuators of all doors for 0.25 seconds
to unlock all doors. Due to this, there may be a
time lag between the driver’s or front passenger's
door lock switch actuation and the time when all
doors are unlocked.

GENERAL DESCRIPTION

SIMPLIFIED WIRING SYSTEM (SWS)

54B-4

FORGOTTEN KEY PREVENTION
FUNCTION

• If the driver's door is locked while it is open and

when the key is still in the ignition key cylinder,
approximately 0.3 second later the ETACS-ECU
activates the unlock relay output for 0.25 second
to prevent the door from being locked with the
key inside the vehicle. In addition, if locking the
door was not prevented, a re-try current is sent
(an unlock relay output ON is sent for 0.25 sec-
ond up to 5 times including the first attempt).

• If the passenger's door or driver's door are locked

while the passenger's door is open and when the
key is still in the ignition key cylinder, approxi-
mately 0.3 second later the ETACS-ECU acti-
vates the unlock relay output for 0.25 second to
prevent the door from being locked with the key
inside the vehicle. In addition, if locking the door
was not prevented, a re-try current is sent (an
unlock relay output ON is sent for 0.25 second up
to 5 times including the first attempt).

POWER WINDOW RELAY CONTROL

POWER WINDOW RELAY OPERATION

If the ignition switch is turned to "ON" or "ACC" posi-
tion, the power window relay is energized to activate
the power windows.

POWER WINDOW TIMER FUNCTION

Even after the ignition is switched off, the
ETACS-ECU keeps the power window relay acti-
vated for approximately 30 seconds, enabling raising
and lowering of the power windows by using the
power window switches. After approximately 30 sec-
onds, the power window relay is deactivated. During
this timed operation, if the driver or passenger doors
are opened, the power window relay is deactivated
from that moment.

KEYLESS ENTRY SYSTEM

KEYLESS ENTRY HAZARD ANSWER-
BACK FUNCTION

If the keyless entry transmitter is used to send a lock
signal to the ETACS-ECU, all doors, the liftgate, and
the glass hatch are locked and the hazard warning
lamps flash once. If an unlock signal is sent, the
driver's door is unlocked first, and if a second signal
is sent, all doors, the liftgate, and the glass hatch are
unlocked. Each time the unlock signal is sent, the
hazard warning lamps flash twice.

KEYLESS ENTRY HORN ANSWERBACK
FUNCTION

If the keyless entry transmitter is used to send 2 lock
signals to the ETACS-ECU, the first signal locks all
doors, while the second signal sounds the horn once.

TRUNK UNLOCK FUNCTION

Press the "TRUNK" button twice within 5 seconds
and the trunk lid will be unlocked.

TIMED LOCKING MECHANISM

After unlocking the doors with the keyless entry
transmitter, if no doors are opened or if the ignition
key is not inserted, the ETACS-ECU automatically
locks the doors in 30 seconds.

SUNROOF CONTROL

SUNROOF TIMER FUNCTION

The ETACS-ECU enables opening and closing of the
sunroof for 30 seconds after the ignition is switched
off. During this timed operation, if the driver's or front
passenger’s door is opened, the sunroof timer func-
tion is deactivated from that moment.

WINDSHIELD WIPERS AND WASHERS

LOW SPEED WIPER, HIGH SPEED WIPER
CONTROL

• When the ignition switch in at the ACC or ON

position, and the windshield low speed wiper
switch of the column switch is turned ON, the
front-ECU turns ON the windshield wiper drive
signal, turns OFF (LO) the windshield wiper
speed relay, and operates the windshield wiper at
low speed.

• When the windshield high speed wiper switch is

turned ON, the windshield wiper drive signal is
turned ON, the windshield wiper speed switching
relay is turned ON (HI), and the windshield wiper
is operated at high speed.

Content .. 1 2 3 ..