Part 1

GENERAL INFORMATION




COMMUNICATION METHOD
As shown in the figure, SWS communications connect the ETACS*1-ECU, the column switch (in the column-ECU), the front-ECU, and the sunroof-ECU. CAN*2*3 communications connect the ETACS-ECU, the powertrain control module, the A/C-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: *1. ETACS: Electronic Time and Alarm Control System

NOTE: *2. CAN: Controller Area Network

NOTE: *3. : For details on CAN, see Information Bus.

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 operates 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 actuators of all doors and the liftgate for 0.25 seconds and to unlock all doors and the liftgate.

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 and the liftgate for 0.25 seconds to lock all doors and the liftgate.
- 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 current through the door lock actuators of all doors and the liftgate for 0.25 seconds to unlock all doors and the liftgate.
- When the door is locked and unlocked by driver's or front passenger's door lock switch consecutively, the ETACS-ECU operates its door lock relay and passes a current through the door lock actuators of all doors and the liftgate for 0.25 seconds to lock all doors and the liftgate. Then, the ETACS-ECU operates its door unlock relay and passes a current through the door lock actuators of all doors and the liftgate for 0.25 seconds to unlock all doors and the liftgate. 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 and the liftgate are unlocked.

FORGOTTEN KEY PREVENTION FUNCTION
- If the driver's door is locked while open and 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 second 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, 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 second up to 5 times including the first attempt).

LIFTGATE AND GLASS HATCH

Liftgate Control*1
Activating the liftgate handle when it is unlocked*2 and the glass hatch is closed and when the glass hatch handle is OFF while the vehicle is stopped will activate the liftgate relay for 0.5 second.
Glass Hatch Control*1 Activating the glass hatch handle when the liftgate is closed and unlocked*2 and when the lift gate handle is OFF while the vehicle is stopped will activate the glass hatch relay for 0.5 second.

NOTE: *1: The liftgate and glass hatch cannot be opened simultaneously.

NOTE: *2: Determination of whether the liftgate is locked or unlocked is performed as follows. (Because it is a dual-mode latch, the logic is based on assumed locked and unlocked states):
- If all door lock actuators are sent unlock currents, the liftgate is unlocked.
- If all door lock actuators are sent lock currents, the liftgate is locked.

DOOR-AJAR INDICATOR LIGHT

The combination meter receives the signal sent from the ETACS-ECU about whether each door (including the tailgate and glass hatch) is open or closed and turns the door ajar indicator light on and off. While the door ajar indicator is illuminated, the door ajar warning function is activated and the door ajar indicator light flashes 4 times. If the door remains open even after the 4 warning flashes, the door ajar indicator light will be illuminated again.

FLASHER TIMER

TURN SIGNAL LIGHT
The turn signal light output (flashing signal) is turned ON when the ignition switch is ON and the turn signal light switch is ON (LH or RH). If the front turn signal light or rear turn signal light bulb has burned out, the flashing speed increases to indicate that the bulb has burned out.

HAZARD WARNING LIGHT
Detects the signal where the hazard warning light switch input changes from OFF to ON, and reverse the flashing state according to this signal. The hazard warning lights toggle on and off whenever the hazard warning light switch is operated.

TURN SIGNAL INDICATORS
At the same time that the turn-signal lights are illuminated, the ETACS-ECU sends a signal to illuminate the turn-signal light indicator via the CAN bus line. The combination meter receives the transmitted signal and turns the turn-signal light indicator on and off.

FOG LIGHT

The fog lights will illuminate only when the fog light switch is operated while the low-beam headlights are on. The fog lights will be switched off when any of the following conditions is met. The fog lights will also be switched off automatically by headlight automatic shutdown function.
- When the high-beam headlights are switched on, the fog lights will be switched off. If the low-beam headlights are switched on again, the fog lights will illuminate again.
- When the headlight switch is turned off while the tail lights are on or the tail lights and headlights are off, the fog lights will be switched off. If the low-beam headlights are switched on again, the fog lights will not illuminate again.

FOG LIGHT INDICATOR
At the same time that the fog lights are illuminated, the ETACS-ECU sends a signal to illuminate the fog light indicator via the CAN bus line. The combination meter receives the transmitted signal and turns the fog light indicator on and off.

HEADLIGHT

HEADLIGHT AUTOMATIC SHUTDOWN FUNCTION
Even if the lighting switch (tail light switch or head-light switch) is ON, the headlights and tail lights will automatically go off in the following conditions to prevent the battery from discharging:

When the ignition key is turned from "ON" to "LOCK" (OFF) or "ACC" position with the lighting switch turned ON, and this state continues for three minutes, the light will automatically be turned off. If the driver's seat door is opened during these three minutes, the light will go off one second later.

HIGH-BEAM INDICATOR
At the same time that the high beams are illuminated, the ETACS-ECU sends a signal to illuminate the high-beam indicator via the CAN bus line. The combination meter receives the transmitted signal and turns the high-beam indicator on and off.

INTERIOR LIGHT

ETACS-ECU makes it possible to force operation of all ON and OFF light switches in the overhead console (the dome light, reading light, cargo area light, rear personal lights, front door lights, and front foot lights). This function is assigned higher priority than the controls for the interior light switch that are performed when the doors are in certain positions.
- When the lights are forced on, the illumination level is 100% as all interior lights are switched on (the dome light, reading light, cargo area light, rear personal lights, front door lights, and front foot lights). Even when all lights are forced on, the interior light automatic shutoff function is active.
- When the lights are forced off, all interior lights are immediately switched off (the dome light, reading light, cargo area light, rear personal lights, front door lights, and front foot lights).

When the interior light switch is at DOOR position, the ETACS-ECU controls the interior lights as follows:
- 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 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 go off 30 seconds later. However, if the ignition key are inserted again or if a door is locked while the interior lights is lighting, the interior lights will go off at that point.
- To check keyless entry operations more easily, the interior lights will flash twice when doors are locked. When doors are unlocked, the interior lights up at a luminance of 100 percent, and goes off 15 seconds later.

INTERIOR LIGHT AUTOMATIC SHUTDOWN 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 following conditions to prevent the battery from discharging as a result of forgetting to turn off the lights or incomplete closing of the door.
- When the ignition switch is turned off and more than 30 minutes pass by with the interior light illuminated, 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 automatically.

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 lights 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 lights flash twice.

KEYLESS ENTRY HORN ANSWER BACK FUNCTION
If the keyless entry transmitter is used to send a driver's door lock signal to the ETACS-ECU, the tone alarm sounds when the ETACS-ECU receives the lock signal.

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.

POWER WINDOW RELAY CONTROL

POWER WINDOW RELAY OPERATION
If the ignition switch is turned to "ON" position, 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 activated for approximately 30 seconds, enabling raising or lowering of the power windows by using the power window switches. After approximately 30 seconds, 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.