FUNCTION AND CONTROL BY ETACS-ECU.


Following functions are controlled by ETACS-ECU.

Function
Function description
Headlamp
Headlamp automatic-shutdown function

Auto lamp function <vehicles with lighting control sensor or vehicles with LDW>

Auto lamp function <vehicles with photo sensor>

Wiper-linked auto lamp function <vehicles with photo sensor>

Daytime running lamp function

Welcome light function

Coming home light function

Flasher timer function
Turn-signal lamp

Comfort flasher function

Hazard warning lamp

ESS (Emergency Stop signal System)

Fog lamp
Front fog lamp function

Rear fog lamp function

Interior lamp
Interior lamp dimmer control function

Interior lamp automatic-shutoff function

Ignition key cylinder illumination lamp control function


HEADLAMP



HEADLAMP AUTOMATIC-SHUTDOWN FUNCTION (INITIAL CONDITION: WITH FUNCTION)




Even when the lighting switch (tail lamp switch or headlamp switch) is ON, the headlamp (including the tail lamps) turns off automatically with any of the following conditions to prevent the battery discharge caused by unattended operation.

note This function can be cancelled through customisation (Refer to Customisation Function ).

AUTO LAMP FUNCTION (INITIAL CONDITION: ILLUMINATES IN STANDARD AMBIENT BRIGHTNESS) <vehicles with lighting control sensor or vehicles with LDW>




  • Auto lamp function automatically turns ON/OFF the headlamp and tail lamp according to the signal from the lighting control sensor (lamp sensor) attached to the windshield when the lighting switch is in the AUTO position.
  • The lamp sensor and the rain sensor are incorporated into the lighting control sensor. The lamp sensor is used for the auto lamp function, and the rain sensor for the rain sensitive wiper function *.
    note *: For the rain sensitive wiper function, refer to GROUP 51, Windshield Wiper and Washer .
  • The lighting control sensor (lamp sensor) detects the front and surrounding brightness of the vehicle. With this detection, it is judged that the vehicle enters a tunnel or just drives under a bridge. When it is judged that the vehicle drives through a tunnel, the headlamp and tail lamp are automatically turned ON. When it is judged that the vehicle drives under a bridge, the headlamp and tail lamp are not turned ON automatically. When the vehicle surroundings get dark in case such as evening, the headlamp and tail lamp are automatically turned ON.
  • The timing that the headlamp and tail lamp are automatically turned ON when the vehicle surroundings get dark in case such as evening can be adjusted by the customisation function. (Refer to Customisation Function .)

AUTO LAMP FUNCTION (INITIAL CONDITION: ILLUMINATES IN STANDARD AMBIENT BRIGHTNESS) <Vehicles with photo sensor>




When the lighting switch is turned to the AUTO position with the ignition switch turned to the ON position, the ETACS-ECU controls the tail lamp relay and headlamp relay output depending on the photo sensor voltage (varies with the ambient brightness) and automatically controls ON/OFF operation of the tail lamp and headlamp.
Headlamp and tail lamp illumination conditions
Tail lamp and headlamp turning OFF condition
note
  1. If a malfunction such as open circuit occurs to the auto-light sensor, the headlamp is kept ON by the fail-safe function.
  2. Through customisation, the sensitivity of auto-light sensor can be adjusted (Refer to Customisation Function ).
  3. To reduce the electrical load at cranking, headlamp illumination is prohibited for 3 seconds after the ignition key is turned ON while the engine is not running (for the cranking of 3 seconds or less, the headlamp is illuminated after the cranking operation is completed).

WIPER-LINKED AUTO LAMP FUNCTION (INITIAL CONDITION: WITHOUT FUNCTION) <Vehicles with photo sensor>




When the lighting switch is in AUTO position, the headlamp will illuminate 3 seconds after the windshield wiper has been turned on.
note Using a customisation function, this function can be enabled or disabled. For more information about the customisation function. (Refer to Customisation Function ).

DAYTIME RUNNING LAMP FUNCTION




The ETACS-ECU illuminates the low-beam headlamps when the ignition switch is turned "ON" with the headlamp switch is at the "OFF" or "TAIL" position. It illuminates the low-beam headlamps at a normal brightness when the headlamps are turned on with the daytime running lamp on.

WELCOME LIGHT FUNCTION (INITIAL CONDITION: TAIL LAMP ILLUMINATES)


When the lighting switch is in the OFF or AUTO position, unlock operation by the keyless entry system lights up the tail lamp or headlamp. The lighting control sensor operates at nighttimes only.
note Using the customisation function, it is possible to adjust that either the tail lamp or headlamp lights up. For more information about the customisation function feature, refer to .

COMING HOME LIGHT FUNCTION (INITIAL CONDITION: 30 SECONDS)


When the ignition switch is in the LOCK (OFF) position, passing operation lights up the headlamp for a certain period.
note Using the customisation function, the illumination time can be adjusted to 15 seconds, 30 seconds, 60 seconds, or 180 seconds. For more information about the customisation function feature, refer to .

FLASHER TIMER FUNCTION



TURN-SIGNAL LAMP (INITIAL CONDITION: TURN SIGNAL LAMP CAN BE OPERATED WHEN THE IGNITION SWITCH IS IN THE ON POSITION)



When the turn-signal lamp switch is ON (LH or RH) with the ignition switch is ON, the turn-signal lamp output (flash signal) is turned ON.
If the lamp bulb of the front or rear turn-signal lamp has burned out, the flashing speed becomes faster to alert the driver that the lamp bulb has burned out.
note Using a customisation function, this function becomes available even when the ignition switch is in the ACC position. For more information about the customisation feature. (Refer to Customisation Function ).

COMFORT FLASHER FUNCTION (INITIAL CONDITION: WITH FUNCTION)



With the ignition switch in the ON position, when the turn signal switch is turned ON momentarily (0.4 second or less), ETACS-ECU turns ON the turn signal lamp output, and flashes the turn signal lamp three times.
note Using the customisation function, "with function/without function" of the comfort flasher function and the switch acceptance time can be set. For more information about the customisation function. (Refer to Customisation Function ).

HAZARD WARNING LAMP



ETACS-ECU detects the signal that changes the hazard lamp switch from OFF to ON, and reverses the flashing state by the signal (to the flashing state when the hazard lamp is not flashing, and to the turned OFF state when flashing).
note
  1. The push-return switch has been adopted for the hazard lamp switch.
  2. Even if the lamp bulb has burned out, the flashing speed of the hazard lamp is not changed.

ESS (EMERGENCY STOP SIGNAL SYSTEM)*


When the ETACS-ECU receives the ESS activation request signal from the ABS-ECU or the ASC-ECU, it flashes the turn-signal lamps at high speed to inform the following car that the driver is applying the brake suddenly.
note *: For further details on the ESS, refer to GROUP 35B - ABS-ECU <vehicles without ASC> or GROUP 35C - ASC-ECU <vehicles with ASC>.

FOG LAMP



FRONT FOG LAMP FUNCTION




When the fog lamp switch is turned to ON with the tail lamp or the headlamp lit (the tail lamp switch or the headlamp switch is ON), the front fog lamp relay turns ON, and the front fog lamps turn on.
If the tail lamp or the headlamp is turned off with the lighting switch OFF while the front fog lamps lit, the front fog lamps turn off the same time to prevent unattended operation.
If the tail lamp is turned off by the headlamp automatic-shutdown function, the front fog lamps turn off at the same time. However, if the tail lamps turn on again, the front fog lamps do not.

REAR FOG LAMP FUNCTION




If the fog lamp switch is turned ON while the front fog lamp is ON, the rear fog lamp illuminates. The rear fog lamp is switched ON or OFF by turning on or off the fog lamp switch.
If the tail lamp is turned OFF, the front fog lamp and the rear fog lamp are turned OFF at the same time.

INTERIOR LAMP



INTERIOR LAMP DIMMER CONTROL FUNCTION (INITIAL CONDITION: 15 SECONDS)




When the interior lamp switch is on the door position, ETACS-ECU controls the interior lamp as follows.

  1. When the ignition switch is OFF:
    By opening any door or tailgate, the lamp turns ON (100%), and dims (50%) when the door or tailgate is closed, then and turns off after 15 seconds.
    However, when the ignition switch is turned ON or the door lock is operated, the lamps turn off at that time.
  2. When the ignition switch is ON:
    By opening any door or tailgate, the lamp (100%) turns ON and OFF when the door or tailgate is closed.
  3. When all doors and the tailgate are closed, and the ignition key is removed*:
    With all the doors closed, when the ignition key is removed, the lamp turns ON (100%) after approximately 1 second (after the engine is stopped), and then gradually dims down to OFF after 15 seconds.
    By inserting the ignition key again or operating the door lock with the lamp lit, the lamps turns off.
note
  • *: For the vehicles with KOS, it is operated the same way when the steering lock is locked or when the emergency key is removed from the key cylinder.
  • For the vehicles with the keyless entry system, the delayed lamp-off time and the operation times of the keyless entry interior lamp answer back can be changed by the customisation function. (Refer to Customisation Function ).

INTERIOR LAMP AUTOMATIC-SHUTOFF FUNCTION (INITIAL CONDITION: 30 MINUTES)




When the interior lamp such as the room lamp [all interior lamps connecting to the room lamp fuse (the front room lamp, the rear room lamp, the luggage compartment lamp, and the ignition key cylinder illumination lamps)] is lit, but either one of the conditions is met, the interior lamp is turned off automatically for preventing the battery discharge caused by the unattended operation or the door-ajar.

note The interior lamp automatic shut-off time can be adjusted by the customisation function. (Refer to Customisation Function ).

IGNITION KEY CYLINDER ILLUMINATION LAMP CONTROL FUNCTION




The ETACS-ECU controls the ignition key cylinder illumination lamp as described below.