Exterior Lights System Description
Headlights Function
The headlights are controlled by the relay control module, based on combination light switch input signals from the body control module.
Headlights Auto-OFF Function
When the headlights auto-off function is selected, the exterior lights automatically turn off when the vehicle is in to 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.
Headlight Fault Detection Function
When a low beam error is detected, the headlights send an error signal to the relay control module. When the relay control module receives the error signal, it sends an LED headlight system indicator signal to the gauge control module via B-CAN.
Turn Signal/Hazard Light Function
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, side*, 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 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.
*: With side turn signal light
One-Push Turn Signal Light
With the vehicle in the ON mode, and when there is a brief input from the turn signal switch, the body control module flashes the left or right turn signal three times in succession.
Fog Light Function (With Fog Light)
The front fog light is controlled by the relay control module and body control module, based on the switch input from the combination light switch.
Daytime Running Lights Function
For daytime running light control, the relay control module controls the daytime running light control circuit 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 with the vehicle in the ON mode and the parking brake released, the relay control module controls the daytime running light control circuit. 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.
Automatic Lighting ON/OFF Control
When the light ON delay time elapses after the automatic lighting control unit-sensor *1 or the automatic lighting/rain sensor *2 output voltage drops to the light ON luminance, the front parking lights, the side marker lights, the taillights, the license plate light, daytime running lights, and the headlights turn on. When the light OFF delay time elapses after the automatic lighting control unit-sensor *1 or automatic lighting/rain sensor *2 output voltage rises to the light OFF luminance, the front parking lights, the side marker lights, the taillights, the license plate light, daytime running lights, and the headlights turn off.
*1: Without automatic wiper
*2: With automatic wiper
Without Automatic Wiper
With Automatic Wiper
Wiper Linked Mode
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 FR WIPER AS signal (ON to OFF count within 20 seconds) from the body control module via B-CAN. After a total of 5 counts, it switches to wiper linked mode and turns on the headlights, the front parking lights, the taillights, inner taillights, daytime running light, and the side marker lights. The ON/OFF signals at the time of windshield washer operation are not counted. When a 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
Warning Function
The automatic lighting control unit-sensor *1 or the automatic lighting/rain sensor *2 sends an indicator signal to the gauge control module in case of a failure of the automatic lighting sensor or when the signal sent from the relay control module by B-CAN signal is abnormal.
*1: Without automatic wiper
*2: With automatic wiper
Interior Lights Brightness Change Control
Regardless of the combination light switch in the AUTO position, the body control module *1 or the automatic lighting/rain sensor *2 controls the brightness for daytime or nighttime brightness. The body control module *1 or the automatic lighting/rain sensor *2 sends the signal to the gauge control module using B-CAN.
*1: Without automatic wiper
2: With automatic wiper
Sensitivity Adjustment Function (For Some Models)
Sensitivity adjustment of the automatic lighting system can be customized with the gauge control module. You can select the customized timing from 5 types (Min, Lo, Mid, Hi, Max) of sensitivity.
Failsafe Function
Automatic Lighting System
When an automatic lighting sensor failure occurs, the system maintains the state before the failure, and a warning is displayed in the multi-information display (MID).