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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 160 (Automatic Headlights & Lighting) >> Component Tests >> Automatic Light Control Sensor

Automatic Light Control Sensor

WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. Auto ON -  Turn the ignition switch ON. Turn the light control switch to AUTO. Gradually cover the top of the sensor. Verify that the accessory lights and the headlights turn ON.
  2. Auto OFF -  Gradually expose the sensor. Verify that the headlights and the accessory lights turn OFF.
  3. Light-Off Condition - 
    • Turn the ignition switch ON.
    • Lights auto ON: Gradually cover the top of the sensor.
    • Verify that the lights will go out when the light control switch position is OFF or the area surrounding the sensor gets bright or when opening the driver's door while the ignition switch is OFF.
  4. Light-On Condition - 
    • Open the driver's door while the ignition switch is OFF.
    • Turn the light control switch to AUTO leaving the door open and cover the top of the sensor, and verify that the lights go on when the ignition switch is turned ON.
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