Fail-Safe Chart [08/2013 - ]
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
- AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM
- The headlight leveling ECU assembly operates in fail-safe mode if an abnormal condition such as those listed below has been detected, and keeps the last low beam status.
Item Abnormality Detection Condition Return Condition Warning Indicator Height control sensor power source voltage Abnormal height control sensor power source voltage (4.6 V or less, or 6.25 V or more) is detected. Abnormal voltage is not detected for 5 seconds consecutively Illuminated Height control sensor signal voltage Abnormal height control sensor signal voltage (0.25 V or less, or 4.75 V or more) is detected. High power source voltage Abnormal high IG supply voltage (18.5 V or more) is detected. Voltage of 17.5 V or less is detected Not illuminated Low power source voltage Abnormal low IG supply voltage (9.0 V or less) is detected. Voltage of 9.3 V or more is detected for 0.1 seconds consecutively Not illuminated Reset while running Reset by a temporary loss of power etc. while driving. Vehicle is stopped Not illuminated
- The headlight leveling ECU assembly operates in fail-safe mode if an abnormal condition such as those listed below has been detected, and keeps the last low beam status.