Part 2

TONE ALARM

GENERAL DESCRIPTION CONCERNING THE TONE ALARM

The tone alarm functions are as follows. These functions 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 position,) 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 ignition 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.

Seat belt tone alarm function

If any of the following conditions is met with the ignition 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 second) if any of the following conditions is met when sixty seconds or more have elapsed since the ignition switch is turned "ON." One cycle consists 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 vehicle 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 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 status, 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).

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 multi-center display.

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

NOTE: The turn-signal light buzzer can be customized on vehicles equipped with a multi-center display (middle-grade type).

General Circuit Diagram For Ignition Key Reminder Tone Alarm Function:

General Circuit Diagram For Light Reminder Tone Alarm Function:

General Circuit Diagram For Seat Belt Tone Alarm Function:

CENTRAL DOOR LOCKING SYSTEM

GENERAL DESCRIPTION CONCERNING CENTRAL DOOR LOCKING SYSTEM
The following ECUs affect the functions and control of the central door locking system.

CENTRAL DOOR LOCKING SYSTEM

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 second to unlock only the driver's door.

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 second 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 current through the door lock actuators of all doors for 0.25 second to unlock all doors.

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 for 0.25 second 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 second 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.

FORGOTTEN KEY PREVENTION FUNCTION

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

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 second up to 5 times including the first attempt).

NOTE: The dotted line indicates that the system is trying to turn on the unlock relay if the door cannot be unlocked.

If the front passenger's door is open when it is locked with the driver's door switch

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).

NOTE: The dotted line indicates that the system is trying to turn on the unlock relay if the door cannot be unlocked.

General Circuit Diagram For The Central Door Locking System (Part 1):

General Circuit Diagram For The Central Door Locking System (Part 2):

POWER WINDOWS

GENERAL DESCRIPTION CONCERNING THE POWER WINDOWS
The following ECUs affect the functions and control of the power windows.

POWER WINDOW MAIN SWITCH FUNCTION
The main switch is located on the driver's door.

Raises the driver's power window

When the driver's power window switch on the power window main switch is pulled up, the system energizes its respective power window motor, and then the driver's window glass rises.

Lowers the driver's power window

When the driver's power window switch on the power window main switch is pushed down, the system energizes its respective power window motor, and then the driver's window glass lowers.

Lowers the driver's power window by one-touch down function

When the driver's power window switch on the power window main switch is pushed down fully, the system energizes its respective power window motor, and then the driver's window glass moves to its lowest position.

Raises the passenger's power window

When the passenger's power window switch on the power window main switch is pulled up, the system energizes its respective power window motor, and then the passenger's window glass rises.

Lowers the passenger's power window

When the passenger's power window switch on the power window main switch is pushed down, the system energizes its respective power window motor, and then the passenger's window glass lowers.

POWER WINDOW SUB SWITCH FUNCTION
The sub switches are located on the passenger's doors. Raises the passenger's power window

When the power window sub switch is pulled up, the system energizes its respective power window motor, and then the passenger's window glass rises.

Lowers the passenger's power window

When the power window sub switch is pushed down, the system energizes its respective power window motor, and then the passenger's window glass lowers.

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 and 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.

General Circuit Diagram For The Power Windows:

KEYLESS ENTRY SYSTEM

GENERAL DESCRIPTION CONCERNING THE KEYLESS ENTRY SYSTEM
The following ECUs affect the functions and control of the keyless entry system.

ALL DOOR LOCK FUNCTION

PRESSING THE TRANSMITTER LOCK BUTTON

When the transmitter lock button is pressed, the ETACS-ECU energizes its door lock relay to operate all the door lock actuators for 0.25 second, locking all doors.

DRIVER'S DOOR UNLOCK FUNCTION

PRESSING THE TRANSMITTER UNLOCK BUTTON ONCE

When the transmitter unlock button is pressed once, the ETACS-ECU energizes its door unlock relay to operate the door lock actuator of the driver's door for 0.25 second, thus unlocking only the driver's door.

ALL DOOR UNLOCK FUNCTION

PRESSING THE TRANSMITTER UNLOCK BUTTON TWICE

When the transmitter unlock button is pressed twice, the ETACS-ECU energizes its door unlock relay to operate the driver's door lock actuator and the other door lock actuators for 0.25 second each in succession. All the doors will be unlocked.

NOTE: If the timed locking function is available, the doors will be locked in 30 seconds after the initial unlocking. Therefore, the second door unlocking should be done within 30 seconds after that initial unlocking.

TRUNK UNLOCK FUNCTION

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

KEYLESS ENTRY HAZARD ANSWERBACK AND HORN ANSWERBACK FUNCTION

KEYLESS ENTRY HAZARD ANSWERBACK

FUNCTION*1

If the keyless entry transmitter is used to send a lock signal to the ETACS-ECU, all doors are locked and the hazard warning lights flash once. If an unlock signal is sent, the driver's door is unlocked first,*2 and if a second signal is sent, all doors are unlocked. Each time the unlock signal is sent, the hazard warning lights flash twice.

NOTE:
- The hazard answerback function can be customized using the keyless entry transmitter or by using the multi center display (middle grade type).
- Vehicles with a multi center display (middle grade type) can be customized so that a single unlock operation will unlock all doors.

KEYLESS ENTRY HORN ANSWERBACK FUNCTION

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

NOTE: The horn answerback function can be customized by using the keyless entry transmitter or by using the multi center display (middle grade type).

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

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

General Circuit Diagram For The Keyless Entry System (Part 1):

General Circuit Diagram For The Keyless Entry System (Part 2):

SUNROOF

GENERAL DESCRIPTION CONCERNING THE SUNROOF
The following ECU affects the functions and control of the sunroof.

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 door or passenger's door is opened, the sunroof timer function is deactivated from that moment.

General Circuit Diagram Regarding The Sunroof:

WINDSHIELD WIPER AND WASHER

GENERAL DESCRIPTION CONCERNING THE WINDSHIELD WIPER AND WASHER
The following ECUs affect the functions and control of the windshield wiper and washer.

Windshield wiper and washer control function

INTERMITTENT CONTROL (VEHICLE SPEED-DEPENDENT VARIABLE TYPE)

ETACS-ECU uses the dial position of the variable intermittent wiper control switch and the vehicle speed signal sent by the combination meter to calculate the interval to be sent to the front-ECU.

NOTE: The speed-sensitive wiper can be customized on vehicles equipped with a multi center display (middle grade type).

The front-ECU determines the intermittent time T1 from the input SWS data signal, and turns ON the windshield wiper drive signal. When the wiper is at the STOP position, the windshield wiper auto-stop signal goes OFF, then turns OFF the windshield wiper drive signal. After the intermittent time T1 seconds from when the windshield wiper drive signal turned ON, the windshield wiper drive signal is turned ON again and the above operation is repeated.

NOTE: If the intermittent time T1 is within 2 seconds, the wiper is operated consecutively at LOW-speed by the front-ECU.

Mist wiper control

When the ignition switch is in the ACC or ON position, and the windshield mist wiper switch is turned ON, the front-ECU turns ON the windshield wiper drive signal. At the same time, the wiper speed switching relay is turned ON (HIGH-SPEED). While the windshield mist wiper switch is ON, the windshield wiper will operate at high speed. Then, if the windshield mist wiper switch is turned off, the wiper operates at low speed until it stops at the predetermined park position.

When the windshield mist switch is turned on briefly, the wiper operates once at low speed.

At the point the windshield mist switch is turned ON, if the windshield wiper has been operating intermittently, the same operations as the above will be performed while the windshield mist wiper switch is ON. After the windshield mist wiper switch goes OFF, the intermittent operations will be set again T1 seconds after the last windshield wiper auto-stop signal turning ON.

Low speed wiper and high speed wiper control

When the ignition switch is 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. Next, 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.

Washer control

When the ignition switch is in the ACC or ON position, and the windshield washer switch is turned ON, the front-ECU turns ON the windshield washer relay. The windshield wiper drive signal is turned ON after 0.15 second until 2 seconds after the windshield washer switch goes OFF to operate the windshield wiper continuously. When the windshield washer switch is turned ON, if the windshield wiper is operating intermittently, intermittent operations will be continued after continuous operations.

NOTE: The wiper drive signal output time varies according to the conditions. Refer to the following table for details.

General Circuit Diagram For The Windshield Wiper And Washer:

HEADLIGHT AND TAILLIGHT

GENERAL DESCRIPTION CONCERNING THE HEADLIGHTS AND TAILLIGHTS
The following ECUs affect the functions and control of the headlights and the taillights.

Taillights and headlights illumination

TAILLIGHTS

If the column switch sends a taillight switch "ON" signal to the front-ECU, the front-ECU turns on its taillight relay, causing the taillights to illuminate.

NOTE: This description covers the taillights only. In actual driving, the taillights may be turned off due to the headlight automatic shut-off function. For the details refer to the headlight automatic shut-off function.

Headlights

If the column switch sends a headlight switch "ON" signal to the front-ECU, the front-ECU turns on its headlight relay (LOW), causing the low-beam headlights to illuminate. If the dimmer switch is turned on while the headlight relay (LOW) is on, the front-ECU turns on the headlight relay (HIGH), causing the high-beam headlights to illuminate.

NOTE: This description covers the headlights only. In actual driving, the headlights may be turned off due to the headlight automatic shut-off function. For the details refer to the headlight automatic shut-off function.

High-beam indicator light
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.

Headlight automatic-shutdown function

Even if the lighting switch (taillights switch or headlight switch) is ON, the headlights (including the taillights) will automatically go off in the following conditions to prevent the battery from discharging as a result of forgetting to turn off lights.

If 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.

NOTE: The headlight automatic-shutoff function can be customized on vehicles equipped with a multi center display (middle grade type).

Dimmer automatic reset function

If the headlight switch is turned off while the high-beam headlights are on, the dimmer switch will be reset. Because of this, the headlights will illuminate at low beam the next time that they are turned on. The dimmer switch will be also reset if the dimmer switch is turned on unintentionally while the passing switch is operated.

Daytime running light function

The ETACS-ECU outputs the daytime running light forced-OFF signal to the front-ECU based on the input signal sent via CAN communication. The front-ECU controls illumination and extinction of the daytime running light according to the daytime running light forced-OFF signal.

Illumination control of daytime running lights
- If the engine is started when the parking brake is not pulled, the headlights illuminate with the brightness reduced.
- If the engine is started while the parking brake is pulled, the daytime running light function OFF mode is entered and the headlights do not illuminate. If the parking brake is released, the OFF mode is cancelled and the headlights illuminate.

General Circuit Diagram For The Taillights:

General circuit diagram for the headlights

General Circuit Diagram For The Headlights:

General Circuit Diagram For The Headlights (Part 1):

General Circuit Diagram For The Headlights (Part 2):

FLASHER TIMER

GENERAL DESCRIPTION CONCERNING THE FLASHER TIMER
The following ECUs affect the functions and control of the flasher timer.

FLASHER TIMER FUNCTION

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.

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.

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.

NOTE: The hazard warning light switch is a push-return type toggle switch.