LIGHTING SYSTEM FAIL-SAFE CHART


  1. LED HEADLIGHT SYSTEM (for LED Headlight)

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

    Item Abnormal Detection Condition Return Condition Warning
    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. A warning message is displayed
    Abnormal input voltage (Low input voltage) If the power source voltage is excessively low (8.5 to 10 V), LED output current will be limited. (Headlight will remain illuminated.) Normal power source voltage (10 to 16 V) returns (output current limit is canceled). A warning message is displayed
    If the power source voltage is excessively low (below 6 V), headlight operation will stop. Power source voltage increases to 8.5 V or more (headlight operation will resume). A warning message is displayed
    Abnormal output

    • Open in output circuit

    • Short between an output terminal and body ground

    • Short between output terminals (Hi and Lo)

    		 The light control switch is turned from off to the head position. A warning message is displayed

  2. 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.