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2019 Acura MDX Owners Manual - Auto High-Beam



Auto High-Beam

Using a camera mounted to the inside of the windshield, this system detects light sources ahead of the vehicle. Depending on the light source, the system automatically switches the headlights to high beam for optimal visibility at night.

The auto high-beam determines when to change the headlight beams by responding to the brightness of the lights ahead of your vehicle. In the following cases, the system may not respond to the lights properly:

  • The brightness of the lights from the preceding or oncoming vehicle is intense or poor.
  • Visibility is poor due to the weather (rain, snow, fog, windshield frost, etc.).
  • Other light sources, such as street lights and electric billboards are illuminating the road ahead.
  • The brightness level of the road ahead constantly changes.
  • The road is bumpy or has many curves.
  • A vehicle cuts in front of you, or a vehicle in front of you is not in the preceding or oncoming direction.
  • Your vehicle is tilted with a heavy load in the rear.

If you find the timing of beam changes inconvenient for driving, change the headlight beams manually.

If you do not want the system to be activated at any time when the headlight switch is in AUTO, consult a dealer or disable the system.

■ Operating the System


To activate the system, turn the headlight switch to AUTO and then set the headlights to low beam. The auto high-beam indicator will come on.

The high beams remain on unless:

  • You have been driving below 45 mph (72 km/h) for an extended amount of time.
  • The speed of the vehicle drops below 30 mph (48 km/h).
  • The windshield wipers have been running at a high speed for more than a few seconds.
  • You enter a well lit location.

 The high beams come back on once the condition that caused them to turn off no longer exists.

If needed, you can temporarily turn the system off manually. Turn on the high beams by pushing the lever forward until you hear a click, or flash the high beams once by pulling the lever toward you. To turn the system back on, repeat one of the procedures.

For the auto high-beam to work properly:

  • Do not place an object that reflects light on the dashboard.
  • Keep the windshield around the camera clean.
  • Do not attach an object, sticker or film to the area around the camera.

If the camera receives a strong impact, or repairing of the area near the camera is required, consult a dealer.

If the Some Driver Assist Systems Cannot Operate: Camera Temperature Too High message appears:

  • Use the climate control system to cool down the interior and, if necessary, also use defroster mode with the airflow directed toward the camera.
  • Start driving the vehicle to lower the windshield temperature, which cools down the area around the camera.

 If the Some Driver Assist Systems Cannot Operate: Clean Front Windshield message appears:

  • Park your vehicle in a safe place, and clean the windshield. If the message does not disappear after you have cleaned the windshield and driven for a while, have your vehicle checked by a dealer.

 ■ Disabling or Re-enabling the System


Disable or re-enable the system when the vehicle is parked with the power mode in ON and the light switch is in the AUTO position.
Disabling the system: Pull the light switch lever toward you and hold it for at least 40 seconds. The auto high-beam indicator in the meter will blink twice.
Re-enabling the system: Pull the light switch lever toward you and hold it for at least 30 seconds. The auto high-beam indicator in the meter will blink once.

The auto high-beam is in the previously selected disabled or re-enabled setting each time you start the engine.


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