ADAPTIVE HIGH BEAM SYSTEM FAIL-SAFE CHART


  1. FAIL-SAFE FUNCTION


    1. No. 1 headlight ECU sub-assembly


      1. The No. 1 headlight ECU sub-assemblies stop light operation if any of the following malfunctions are detected.

        Malfunction Multi-information Display Warning DTC Output
        Lighting on/off LED light source malfunction Low beam Displayed Output
        High beam Displayed Output
        Headlight fan malfunction Displayed Output
        Other than above (communication with main body ECU (multiplex network body ECU)) Displayed Output
        Automatic headlight beam level control system Displayed Output
        Adaptive high beam system Displayed Output
        Power supply IG voltage line malfunction Displayed Output
        Other than an IG voltage line malfunction Not displayed Not output

    2. Headlight light control ECU sub-assembly


      1. When any of the following conditions are met, the headlight light control ECU sub-assembly and LED array stops operating.


        • The power supply voltage is less than 6 V or 17 V or more

        • There is an open or short in the LED array

        • There is an open or short in the wire harness of the LED array

        • There is a LIN communication error between the headlight light control ECU sub-assembly and No. 1 headlight ECU sub-assembly

        • The temperature is excessively high

      2. When any of the following conditions are met, the headlight light control ECU sub-assembly reduces the current supplied to the LED array and the output of the headlights decreases.


        • The LED array fan is malfunctioning

        • The LED array fan circuit is malfunctioning

        • The LED array fan speed detection circuit is malfunctioning