LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2006 >> ES 330 >> Repair and Diagnosis >> Electrical >> Body Electrical >> OEM System Circuits >> Light Auto Turn Off System >> System Outline
April 5, 2026: LEMON Manuals is launched! Read the announcement.

System Outline

  1. Normal Lighting Operation 

    <Turn taillight on>

    With the light control SW turned to TAIL position, a signal is input into TERMINAL (A) 8 of the body ECU. Due to this signal, the current flowing to TERMINAL 14 of the ECU flows to TERMINAL (A) 8 to TERMINAL 14 of the light control SW to TERMINAL 16 to GROUND, and TAIL relay causes taillights to turn on.

    <Turn headlight on>

    With the light control SW turned to HEAD position, a signal is input into TERMINALS (A) 8 and (A) 9 of the body ECU. Due to this signal, the current flowing to TERMINAL 15 of the ECU flows to TERMINAL (A) 9 to TERMINAL 13 of the light control SW to TERMINAL 16 to GROUND in the headlight circuit, and causes taillight and HEAD relay to turn the lights on. The taillight circuit is same as above.

  2. Light Auto Turn Off Operation 

    * When the other lamps than headlamps are lit under 'TAIL' or 'AUTO' condition of the light control SW, the tail lamps and front fog lamps are turned OFF if the ignition SW is turned from ON to OFF, and the driver side door is opened from closed condition.

    * When the headlamps are lit under 'HEAD' or 'AUTO' condition of the light control SW, if the ignition SW is turned from ON to OFF, and the light OFF delay time (30 seconds) has passed since all the doors are closed from open condition or under all the door locked condition, operating the wireless door lock function turns OFF the headlamps, tail lamps and front fog lamps.