FUNCTION OF MAIN COMPONENTS
| Component | Function | |
|---|---|---|
| Main Body ECU (Multiplex Network Body ECU) | Receives the light control signal and transmits a signal to the LED driver module. | |
| Headlight Dimmer Switch Assembly | Light Control Switch | Outputs a light control signal and transmits it to the main body ECU (multiplex network body ECU). |
| Headlight Assembly | Light Emitting Diode (LED) Low Beam | The Light Emitting Diode (LED) low beam shine ahead over a broader area and further forward, increasing the area visible to the driver. |
| LED Driver Module | The LED driver module keeps a constant level of direct current applied to the LEDs, achieving stable LED illumination. | |
| Combination Meter Assembly | Taillight Indicator Light | Lights up to inform the driver when the taillights are on. |
| Master Warning Light | Flashes to alert the driver when a message is being displayed on the multi-information display. | |
| Buzzer | Sounds to alert the driver when a message is being displayed on the multi-information display. | |
| Multi-information Display | Shows a warning message to alert the driver, such as when the vehicle is being driven with the parking brake still engaged. | |
FAIL-SAFE
The LED driver modules operate the fail-safe functions listed below in accordance with the problem that has been detected.
| Problem | Outline |
|---|---|
| Abnormal Input Voltage | If the voltage that is input to the LED driver module deviates from the operating voltage (7 to 17 V), the LED driver module stops illuminating the headlights. It resumes illuminating the headlights once the voltage returns to the operating voltage range. |
| Abnormal Output (Open Circuit or Short Circuit) | If an abnormal condition (open or short) occurs in the voltage that is output by the LED driver module, an LED driver module stops illuminating the headlights and will maintain this state until power is reinstated. Power is reinstated by turning the headlight dimmer switch assembly (light control switch) from off to on. |
DIAGNOSIS
When the main body ECU (multiplex network body ECU) detects a malfunctions in the LED headlight system, Diagnostic Trouble Codes (DTCs) are stored in memory.
The DTCs can be read using the Global TechStream (GTS). For details, refer to the Repair Manual.