Headlamp: Description and Operation

HEADLIGHT AND TAILLIGHT







The ECU related to the headlight and taillight and various control functions are as follows.








TAILLIGHT
The front ECU will light up the taillight when the taillight switch signal from the column switch is in the ON state and the built-in taillight replay is in the ON state.

NOTE: This item only considers the taillight light up function and does not take into consideration the other functions. In actual driving, the taillights may be turned off due to the headlight automatic shut-down function.

Headlights And High-beam Indicator Light:

Headlights and High-Beam Indicator Light
The front ECU lights up the headlight (LOW) when the signal from the column switch to the headlight switch is in the "ON" state and the built-in head light relay (LOW) is in the ON state. 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.

What's more, ETACS-ECU lights up the high beam indicator light when the acknowledgment signal from the front ECU is in the "HI-BEAM ACK" state or the head light switch signal from the column switch is in the "PASS" state.

NOTE: This item only considers the headlight light up function and doesn't take into consideration the other functions. In actual driving, the headlights may be turned off due to the headlight automatic shut-down function. For the details of the headlight automatic shut-down function, refer to its Section.







Headlight Automatic-Shutdown Function
Even if the lighting switch (taillight switch or headlight switch) is ON, the head light (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. 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.

NOTE: This function can be disabled by the configuration function







Dimmer Automatic Reset Function
The column switch (column ECU) resets the dimmer switch and prevents the high beam from lighting up when turning on the headlight again if the headlight switch is put in the OFF position while the high beam of the headlight is on (including the instance when the dimmer switch is erroneously put in the ON state upon passing operations) and resets the dimmer switch.