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Lane-keep Assist System (Some Models)
The lane-keep assist system alerts the driver that the vehicle may be deviating from its lane and it provides steering assistance to help the driver stay within the vehicle lanes.
The forward sensing camera (FSC) detects the white lines (yellow lines) of the vehicle lane in which the vehicle is travelling and if the system determines that the vehicle may deviate from its lane, it operates the electric power steering to assist the driver's steering operation. The system also alerts the driver by activating a lane departure warning sound, vibrating the steering wheel, and indicating an alert in the display.
Refer to Forward Sensing Camera (FSC) (Search).
The steering wheel operation of the lane-keep assist system has “Late” and “Early” steering assist timing functions.
For the “Late” function, the system assists the driver's steering operation if there is the possibility of the vehicle deviating from its lane.
For the “Early” function, the system assists the driver's steering operation constantly so that the vehicle stays near the centre of the vehicle lane.
The “Late” and “Early” functions can be changed (timing at which steering assist is provided) by changing the setting.
Refer to Personalisation Features (Search).
Do not rely completely on the lane-keep assist system:
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The lane-keep assist system is not an automatic driving system. In addition, the system is not designed to compensate for a driver's lack of caution, and over-reliance on the system could lead to an accident.
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The detection ability of the lane-keep assist system is limited. Always stay on course using the steering wheel and drive with care.
Do not use the lane-keep assist system in the following cases:
The system may not operate adequately according to the actual driving conditions, resulting in an accident.
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Driving on roads with tight curves.
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Driving under bad weather conditions (rain, fog, and snow).
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Slippery roads such as ice or snow-bound roads.
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Roads with heavy traffic and insufficient distance between vehicles.
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Roads with no white (yellow) lane lines.
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Narrow roads resulting from road construction or lane closures.
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The vehicle is driven on a temporary lane or section with a closed lane resulting from road construction where there may be multiple white (yellow) lane lines or they are interrupted.
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The tyre pressures are not adjusted to the specified pressure.
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Tyres of a different specified size are used, such as an emergency spare tyre.
Heed the following cautions so that the lane-keep assist system can operate normally.
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Do not modify the suspensions.
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Always use wheels of the specified type and size for the front and rear wheels. Consult an expert repairer, we recommend an Authorised Mazda Repairer for tyre replacement.
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When the direction indicator lever is operated for a lane change, the lane-keep assist system is automatically disabled. The lane-keep assist system becomes operational again when the direction indicator lever is returned and the system detects white (yellow) lane lines while the vehicle is being driven normally within its vehicle lane.
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If the steering wheel, accelerator pedal, or brake pedal is operated abruptly and the vehicle moves close to a white (yellow) line, the system determines that the driver is making a lane change and the lane-keep assist system operation is temporarily cancelled. The lane-keep assist system becomes operational again when the system detects white (yellow) lane lines while the vehicle is being driven normally within its vehicle lane.
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If the vehicle deviates from its lane repeatedly within a short period of time, the lane-keep assist system may not operate.
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When white (yellow) lane lines are not detected, the lane-keep assist system does not operate.
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Under the following conditions, the lane-keep assist system may not be able to detect white (yellow) lane lines correctly and it may not operate normally.
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If an object placed on the instrument panel is reflected in the windscreen and picked up by the camera.
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Heavy luggage is loaded in the luggage compartment or on the rear seat and the vehicle is tilted.
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The tyre pressures are not adjusted to the specified pressure.
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Tyres other than conventional tyres are equipped.
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When the vehicle is driven on the guiding branch to or from the rest area or tollgate of a highway.
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The white (yellow) lane lines are less visible because of dirt or fading/patchiness.
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A vehicle in front of your vehicle is running near a white (yellow) lane line making it less visible.
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A white (yellow) lane line is less visible because of bad weather (rain, fog, or snow).
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The vehicle is driven on a temporary lane or section with a closed lane resulting from construction where there may be multiple white (yellow) lane lines or they are interrupted.
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A misleading line is picked up on the road such as a temporary line for construction, or because of shade, lingering snow, or grooves filled with water.
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The surrounding brightness suddenly changes such as when entering or exiting a tunnel.
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The illumination of the headlights is weakened because of dirt or the optical axis is deviated.
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The windscreen is dirty or foggy.
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The windscreen, camera is fogged (water droplets).
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Back-light is reflected off the road surface.
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The road surface is wet and shiny after rain, or there are puddles on the road.
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The shade of a guardrail parallel to a white (yellow) lane line is cast on the road.
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The width of the driving lane is narrow (less than about 2.5 m (98 in)) or wide (more than about 4.5 m (178 in))
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Driving on roads with tight curves.
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The road is excessively uneven.
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The vehicle is shaken after hitting a road bump.
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There are two or more adjacent white (yellow) lane lines.
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There are various road markings or lane markings of various shapes near an intersection.
