ETACS-ECU FUNCTIONS AND CONTROLS

The following functions are controlled by ETACS-ECU:

Function		Control ECU	Explanation of function
Headlamp	Headlamp automatic-shutdown function	ETACS-ECU, column switch
	High-beam indicator
	Daytime running lamp function
Flasher timer function	Turn-signal lamp control	ETACS-ECU, column switch
	Comfort flashing function
	Turn-signal lamp indicator
	Hazard warning lamp control
Front fog lamp	Front fog lamp control	ETACS-ECU, column switch
Front fog lamp	Front fog lamp indicator	ETACS-ECU, column switch
Rear fog lamp	Rear fog lamp control	ETACS-ECU, column switch
Rear fog lamp	Rear fog lamp indicator	ETACS-ECU, column switch
Interior lamp	Room lamp dimmer control function	ETACS-ECU
Interior lamp	Ignition key illumination lamp control function	ETACS-ECU

HEADLAMP

HEADLAMP AUTOMATIC-SHUTDOWN FUNCTION <INITIAL CONDITION: WITH FUNCTION>

Even when the lighting switch (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.

While the headlamp illuminates, turn the ignition switch from ON to OFF and open the driver’s door for 1 seconds or longer, the headlamp and tail lamp are turned off automatically.

note The above control is activated only once after the ignition switch is turned from the "ON" position to the "OFF" position.

note If only the tail lamp illuminates, it is not turned off automatically.
While the headlamp illuminates, turn the ignition switch from "ON" to "OFF", and close the driver’s door for 3 minutes or longer, the headlamp and tail lamp are turned off automatically.
If the headlamp switch is turned ON while the ignition switch is in the "OFF" position, the automatic-shutdown function does not operate.

After the headlamp automatic-shutdown function, when the lighting switch is turned OFF and then ON or, the ignition switch is turned ON, the headlamps turn on again.

note

Using a customisation function, the headlamp automatic-shutdown function can be enabled or disabled (Refer to

HIGH-BEAM INDICATOR

The ETACS-ECU outputs the high-beam indicator ON signal in synchronization with the high-beam headlamp operation.

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" position. It illuminates the low-beam headlamps at a normal brightness when the headlamps are turned on with the daytime running lamp on. If the lighting switch is turned to "TAIL" or "HEAD" position, the illumination works as usual.

FLASHER TIMER FUNCTION

TURN-SIGNAL LAMP CONTROL <INITIAL CONDITION: OPERATES WHEN IGNITION SWITCH IS "ON".>

When the turn-signal lamp switch is ON (LH or RH) with the ignition switch 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 the customisation function, the operating conditions of turn-signal lamp function can be adjusted (Refer to

COMFORT FLASHING FUNCTION <INITIAL CONDITION: WITHOUT FUNCTION>

When the turn-signal lamp switch is turned ON momentarily (0.4 second or less) while the ignition switch is in the "ON" position, the turn-signal lamp (selected side) flashes 3 times.

note

Using a customisation function, the comfort flashing function can be enabled or disabled (Refer to

TURN-SIGNAL LAMP INDICATOR

ETACS-ECU outputs the turn-signal lamp indicator ON signal in synchronization with the turn signal lamp illumination.

HAZARD WARNING LAMP CONTROL

When the hazard lamp switch input signal turning from OFF to ON is detected, the flashing states turns over by the signal (When the hazard lamp is not blinking, it blinks. If it is blinking, it turns off).

note

The push-return switch is adopted for the hazard lamp switch.
Even if the lamp bulb has burned out, the flashing speed of the hazard lamp is not changed.

FRONT FOG LMP

FRONT FOG LAMP CONTROL

When the fog lamp switch is turned to ON with the tail lamp or the headlamp lit (the tail lamp switch, the headlamp switch is ON or daytime running light is operating), 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.

FRONT FOG LAMP INDICATOR

ETACS-ECU outputs the front fog lamp indicator ON signal in synchronization with the front fog lamp illumination.

REAR FOG LAMP

REAR FOG LAMP CONTROL

If the fog lamp switch is turned ON again while the front fog lamps are ON, the rear fog lamps illuminate. <Vehicles with front fog lamp and rear fog lamp>
If the fog lamp switch is turned ON while the headlamps are ON, the rear fog lamps illuminate. <Vehicles without front fog lamp and with rear fog lamp>

If the headlamp and the front fog lamp or the tail lamp are turned OFF, the rear fog lamp is turned OFF at the same time.

REAR FOG LAMP INDICATOR

ETACS-ECU outputs the rear fog lamp indicator ON signal in synchronization with the rear fog lamp illumination.

INTERIOR LAMP

ROOM LAMP DIMMER CONTROL FUNCTION (THE INITIAL CONDITION: 15 SECONDS <vehicles with central door locking system> or 7.5 SECONDS <vehicles without central door locking system>)

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

When the ignition switch is OFF:
By opening any door, the lamp turns ON (100%), and dims (60%) when the door is closed, then and turns off after 15 seconds <vehicles with central door locking system> or 7.5 seconds <vehicles without central door locking system>.
However, when the ignition switch is turned ON or the door lock is operated, the lamps turn off at that time.
When the ignition switch is ON:
By opening any door, the lamp (100%) turns ON and OFF when the door is closed.
When all doors are closed, and the ignition key is removed <vehicles with keyless entry system>:
By removing the ignition key with all doors closed, the lamp turns ON 100%, and turns off after 15 seconds.
By inserting the ignition key again or operating the door lock with the lamp lit, the lamps turns off.
Keyless entry room lamp answerback <vehicles with keyless entry system>:
For easy keyless entry operation check, room lamp flashes once when the door is locked. When the door is unlocked, the lamp lights ON for 15 seconds (100%), and then turns OFF.

note

Using the M.U.T.-III customise function, settings for the delayed lamp-off time and the operation times of the keyless entry room lamp answerback can be changed (Refer to

IGNITION KEY CYLINDER ILLUMINATION LAMP CONTROL FUNCTION

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

When the driver’s door is opened or for 30 seconds after the driver’s door is closed, the ignition key cylinder illumination lamp flashes.
Also when the ignition key is removed from the ignition key cylinder, the lamp illuminates for 30 seconds. <vehicles with keyless entry system>
When the ignition key cylinder illumination lamp is operating with the doors closed, it goes out if the ignition switch is turned ON.