Lane Keeping Aid (LKA) – operation

Updated 2023-06-08

The LKA function is designed to help reduce the risk of accidents in situations where the vehicle unintentionally leaves its lane and there is a risk of driving off the road or into the opposite lane.

LKA is active at speeds above 40 mph (65 km/h) on highways or other major roads with clearly marked side/lane marker and center lines. On narrow roads where the distance between side/lane marker lines is less than approximately 8.5 feet ( 2.6 meters), LKA will be temporarily deactivated.

P3-1320-ALL-USA-lane departure warning — LKA monitors and follows the marker lines (the red lines in the illustration)

White side marker lines: the function is active and "sees" one or both of the road's side marker lines.
Gray side marker lines: the function is active but cannot "see" one or both of the road's side marker lines.

P3-1346-USA-S60/V60 LKA red and white lines — LKA intervening on the right side (the red line)

When LKA is working actively, this is indicated by:

Red side marker line: the line being crossed.

On/Off

LKA can be switched on or off by pressing the button on the center console. A light in the button illuminates when the function is on.

Depending on the number of optional features installed in the vehicle, there may not be space for the On/Off button on the center console. If this is the case, LKA can be switched on or off in the MY CAR menu system.

The following LKA-related settings can also be made in MY CAR, under Settings → Lane Keeping Aid settings → Assistance mode:

Vibration only: Warning by vibrations in the steering wheel On or Off.
Steering assist only: Active steering On or Off.
Full function: Both vibrations and active steering On or Off.

Steering assist

LKA attempts to keep the vehicle within the lane's side marker lines.

P4-1220-LKA Princip Styrhjälp — LKA provides steering assistance

If the vehicle approaches one of the lane's side marker lines and the turn signals are not being used, LKA will attempt to steer the vehicle back into the lane.

Vibration warnings

P4-1220-LKA Princip Varning+Styrhjälp — LKA provides vibrations in the steering wheel and steering assistance1.

If the vehicle crosses a marker line, LKA provides a warning in the form of vibrations in the steering wheel. This occurs even if the steering assist function has been deactivated.

Dynamic cornering

P4-1220-LKA Princip Gena i kurva — LKA does not intervene in sharp left curves

In certain cases, LKA allows the vehicle to cross marker lines without providing a vibration warning or steering assistance, for example, during dynamic cornering as shown in the illustration where the driver's view of the road and traffic conditions make this possible.