The headlights are controlled by the body control module, based on combination light switch input signals.

When the headlights auto-off function is selected, the exterior lights automatically turn off when the vehicle is in the OFF (LOCK) mode, and the driver's door is opened and closed. The timing for turning off the exterior lights can be customized to suit the customer needs.

When a low beam error is detected, the headlights send an error signal to the body control module. When the body control module receives the error signal, it sends an LED headlight system indicator signal to the gauge control module via the B-CAN.

The turn signal/hazard warning lights are controlled by the body control module, using input from the combination light switch or hazard warning switch signal. When the body control module receives a left turn or right turn command from the combination light switch, it blinks the front and rear turn signal lights for the left or right side of the vehicle. When the body control module receives a hazard warning command from the hazard warning switch, it blinks the front and rear turn signal lights for both sides of the vehicle. The system also includes wire break detection by monitoring the current values using the body control module. An abnormal value is registered as a wire break (open) or faulty bulb or LED. When this occurs, the body control module increases the turn signal lighting frequency. If the break detection shows that the current value has returned to the correct value, the body control module returns to the normal frequency.

The fog light is controlled by the body control module, based on the switch input from the combination light switch.

For daytime running light control, the body control module controls the daytime running light relay based on the combination light switch signal, the parking brake signal, and the automatic lighting signal, and then turns on the light. When the combination light switch is in the OFF position or the AUTO position at the time of the vehicle ON mode, and the parking brake is released, the body control module controls the daytime running light relay. When the combination light switch is in the ON position or the AUTO position, and the low beam output signal from the automatic lighting control unit-sensor or the automatic lighting/rain sensor are inputted to the body control module, daytime running light control is not performed.

When the light ON delay time elapses after the automatic lighting control unit-sensor or the automatic lighting/rain sensor output voltage drops to the light ON luminance, the front parking lights, the side marker lights, the taillights, the license plate lights, and the headlights turn on. When the light OFF delay time elapses after the automatic lighting control unit-sensor or automatic lighting/rain sensor output voltage rises to the light OFF luminance, the front parking lights, the side marker lights, the taillights, the license plate lights, and the headlights turn off.

When the wiper switch is in a position other than OFF, the automatic lighting control unit-sensor^*1 or automatic lighting/rain sensor^*2 counts and records the windshield wiper motor ON to OFF signal (edge count) within 20 seconds from the body control module (FR WIPER AS signal) via the B-CAN. After a total of 5 counts^*1 or 4 counts^*2, it switches to wiper linked mode and turns on the headlights, the front parking lights, the taillights, inner taillights, and the side marker lights. The ON/OFF signals at the time of windshield washer operation are not counted. When an edge count is not received for 30 seconds or more, the count is reduced by 1, and shifting to normal mode is done when the count reaches 0. The wipers return to normal when the vehicle is stopped, or when the respective switch is set to OFF.

*1: Without automatic wiper
*2: With automatic wiper