HBC (HIGH BEAM CONTROL)

id921000000700

Purpose of Adoption

• The HBC system recognizes headlights (on-coming vehicles), taillights (vehicles ahead), and street lights (travel through cities/towns) using the monocular camera installed in the windshield and automatically switches the headlights between high and low beams for improved use-frequency of the high beams and assured visibility while driving at night.

Service point

System operation conditions

• When the following conditions (1) to (3) are met simultaneously while driving, the headlights are switched automatically between high and low beams.

1. Headlight switch is in AUTO and HI position

2. Headlights are illuminated by the auto-light function

3. System determines that it is night by the surrounding level of brightness

*When conditions (1) to (3) are met, the headlights are switched between high and low beams as follows.

• Low beam illumination conditions

1. Vehicle speed is less than 25 km/h

2. Forward sensing camera detects lamp types of vehicles ahead and on-coming vehicles

3. When driving in areas with continuos line of street lamps, or in cities where the road surface is bright.

• High beam illumination condition

1. Vehicle speed is 30 km/h or more and the low beam illumination conditions are not met

System cancel (operation stop) conditions

• If any of the following conditions (1) to (3) are met, the automatic control is canceled.

1. Headlight switch is position other than AUTO or HI

2. Headlights are turned off by auto-light function

3. System determines that it is not night by the surrounding brightness

The HBC system functions can be personalized as follows.(*1)

• Non-operation of HBC function: HBC system does not operate even if system operation conditions indicated in 1. above are met(*1) User personalization possible only on instrument cluster with center display equipped. Otherwise, personalization can be performed at dealerships.

Common Inquiry

• Operation may be delayed due to the narrower camera angle compared to the driver's eyesight.

• In particular, if an oncoming vehicle suddenly appears from around a tight corner, the on-coming vehicle may not be in the camera's angle of view and headlight switching from high to low may not be performed.

• High to low switching cannot be performed against pedestrians. This is because high/low switching is performed by detection of light source.

• The system may not operate correctly

― Weather conditions:

• Rain, fog, blizzards, snow-covered roads, wet roads (light is reflected), full moon (moonlight is reflected off road surface), lightening (mistaken as light source).

• Large amount of pitching while driving on a wet road (light distribution unstable).

• Light distribution of detecting vehicle is not correct (malfunction, bulb change, eye-line installation, change in vehicle height)

• Mistaken switching from high to low beams.

• Mis-operation due to confusing light from which camera cannot discern vehicles (light emitting object*, reflecting object*).*

• Light-emitting object: Street lights, light-emitting street signs, traffic signals, driving lane border lines, corner guidance lights, factories, vending machines, signs, distant street lights*

• Light reflecting objects: Reflectors, reflecting signs, cat-eyes, markers, highly luminous white lines or road paint, mirrors, stopped vehicles.

• High to low switching delay/No high to low switching

― Detection delay or no detection of on-coming vehicle/vehicle ahead due to headlight/taillight abnormality (not illuminated, dark, bulb burned out, use of colored bulbs, light distribution deviation, light axis deviation, weak reflection from reflector).

― Two-wheeled vehicles/bicycles may not be detected even if headlight and taillight are illuminated.

― Low to high beam switching delay/No low to high beam switching.

― Road surface is bright from street lights even if not in a city/town area.

― Reflectors or reflecting signs even though there are no street lights.

Other

• Sensor type: Forward sensing camera

ac5jjn00000037