Can't Get Auto High Beams Back On
Thread Starter
Instructor
Joined: Jul 2021
Posts: 115
Likes: 34
Can't Get Auto High Beams Back On
I have put car in the On position with engine running, put light switch in low beam and in the Auto position, held the light switch towards me for 30 secs and the Auto high beam indicator blinks once. The indicator does not illuminate, and the auto high beams don't seem to work anymore. Haven't taken the car on dark roads though so maybe it senses I don't need it until then?
Pro
Joined: Mar 2010
Posts: 667
Likes: 108
From: Ontario (Canada)
Auto high beam operation is complicated... Many conditions have to be met, see following extract from the service manual:Auto High-Beam (High-Beam Support System) Description
Overview
The system operates by switching the high beam and low beam automatically depending on the road condition of vehicles running ahead and opposite vehicles, using the multipurpose camera unit.
Operating Conditions
The combination light switch is in the AUTO position. The headlight low beam is turned on.
White and red light sources are not detected ahead. 2 or more streetlights have not been detected.
The vehicle speed is above 45 mph (72 km/h). There is no halation state in front of the vehicle.
There is no manual operation input of the combination light switch.
NOTE: Weather and road conditions (undulation, curve, or environment illuminance etc.) may affect system operation.
Stopping Condition
The system stops operation under the following conditions.
When the combination light switch is turned to other than the AUTO position.
When the dimmer switch is operated. Driving in a winding road
Driving in a up and down road
Conditions that the System Switches to Low Beam
When there are objects that are emitting lights such as streetlights, house lights, advertising display lighting, signages, vending machines, or other reflecting light.
When there are objects emitting lights on the road similar to the taillights of vehicles driving ahead or headlights of opposite vehicles.
When the red lights of the traffic signals are detected.
When the front wiper motor operates at HIGH for 5 seconds.
Conditions that Switching Timing to Low Beam is Changed
When the taillights of the vehicle driving ahead are bright or dark. When the headlights of the opposite vehicle are bright or dark.
In rainy, snowy, and foggy weather.
Detection Range and Limits
The multipurpose camera unit recognizes and reacts within the range of 25 ° horizontally (total 50 °).
Overview
The system operates by switching the high beam and low beam automatically depending on the road condition of vehicles running ahead and opposite vehicles, using the multipurpose camera unit.
Operating Conditions
The combination light switch is in the AUTO position. The headlight low beam is turned on.
White and red light sources are not detected ahead. 2 or more streetlights have not been detected.
The vehicle speed is above 45 mph (72 km/h). There is no halation state in front of the vehicle.
There is no manual operation input of the combination light switch.
NOTE: Weather and road conditions (undulation, curve, or environment illuminance etc.) may affect system operation.
Stopping Condition
The system stops operation under the following conditions.
When the combination light switch is turned to other than the AUTO position.
When the dimmer switch is operated. Driving in a winding road
Driving in a up and down road
Conditions that the System Switches to Low Beam
When there are objects that are emitting lights such as streetlights, house lights, advertising display lighting, signages, vending machines, or other reflecting light.
When there are objects emitting lights on the road similar to the taillights of vehicles driving ahead or headlights of opposite vehicles.
When the red lights of the traffic signals are detected.
When the front wiper motor operates at HIGH for 5 seconds.
Conditions that Switching Timing to Low Beam is Changed
When the taillights of the vehicle driving ahead are bright or dark. When the headlights of the opposite vehicle are bright or dark.
In rainy, snowy, and foggy weather.
Detection Range and Limits
The multipurpose camera unit recognizes and reacts within the range of 25 ° horizontally (total 50 °).
Thread Starter
Instructor
Joined: Jul 2021
Posts: 115
Likes: 34
Thank you for this info - I learned a bit more on this system.
I solved my issue. In addition to the process in my first post " I have put car in the On position with engine running, put light switch in low beam and in the Auto position, held the light switch towards me for 30 secs and the Auto high beam indicator blinks once", when driving at night in Auto position on the light switch, I pulled the lever towards me once as if to flash high beams and the A in the dash came back on and now have auto high beams again.
I solved my issue. In addition to the process in my first post " I have put car in the On position with engine running, put light switch in low beam and in the Auto position, held the light switch towards me for 30 secs and the Auto high beam indicator blinks once", when driving at night in Auto position on the light switch, I pulled the lever towards me once as if to flash high beams and the A in the dash came back on and now have auto high beams again.
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