LIGHTING SYSTEM FAIL-SAFE CHART


  1. AUTOMATIC LIGHT CONTROL SYSTEM

    If the main body ECU (multiplex network body ECU) detects a malfunction in the automatic light control sensor, the main body ECU (multiplex network body ECU) performs fail-safe control to prohibit the automatic light control. If the low beam headlights and taillights are on, the lights will remain on until the light control switch is turned off.

  2. LED HEADLIGHT SYSTEM

    The light control LED ECU operates in fail-safe mode if any of the following abnormalities are detected.

    Item Abnormality Detection Condition Return Condition Multi-information Display

    Abnormal input voltage

    (High input voltage)

    		 Abnormal power source voltage (more than 17 V) is detected. Normal power source voltage (10 to 16 V) is detected. "CHECK HEADLIGHT SYSTEM"*1 or "Check Headlight System"*2 message is displayed

    Abnormal input voltage

    (Low input voltage)

    		 If the power source voltage is too low (8.5 to 10 V), LED output current will be limited. (Headlights will remain illuminated.) Output current limit is canceled when the voltage returns to the specified operating voltage (10 to 16 V). "CHECK HEADLIGHT SYSTEM"*1 or "Check Headlight System"*2 message is displayed
    If the power source voltage is too low (below 6 V), headlight operation will stop. If the voltage returns to 8.5 V or more, headlight operation will resume.
    Abnormal output

    • Open in output side circuit

    • Short between output terminal and body ground

    • Short between output terminals (Hi and Lo)

    		 Light control switch is turned from off to head position. "CHECK HEADLIGHT SYSTEM"*1 or "Check Headlight System"*2 message is displayed

    • *1: Multi-information Display (for Monochrome Type)

    • *2: Multi-information Display (for Color Type)