Lane Keeping System Operation

WARNING: This page is about a different car, the 2017 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

The lane keeping system is turned on and off using the lane keeping system switch located on the center console. The last known on/off setting for the lane keeping system is recalled every time the key is turned on. When a MyKey ® is in use, the system defaults the lane keeping alert mode to on and cannot be turned off. When the system is on, it is active only when the vehicle speed is above 40 mph (64 km/h) and at least one lane marking can be detected by the camera. The system can be turned off at any time by pressing the lane keeping system switch. If the lane keeping system switch is pressed when a MyKey ® is in use, the IPC message center will display a message informing the driver that the system is on.

The system can be temporarily suppressed at any time by the following:

Rapid braking or acceleration
Evasive steering maneuver
Using the turn signal indicator (only for the side the indicator is on)

Lane Keeping Alert

The lane keeping alert generates vibration through the steering wheel when a lane departure is detected by the IPMA. When commanded by the IPMA, the PSCM rapidly oscillates the power steering left to right, simulating the vehicle driving on a rumble strip. The intensity of the steering wheel vibration can be adjusted using the Driver Assist options in the message center. The system also provides a visual alert in the message center when a lane departure is detected.

Lane Keeping Aid

The lane keeping aid provides steering torque to help the driver keep the vehicle in the lane when a lane departure is detected. The IPMA sends the road curvature and calculated steering angle messages to the PSCM. The PSCM uses these messages to calculate and generate the intervention torque.

Hands-Off Warning

When the lane keeping aid is active, the PSCM continuously monitors the torque sensor in the EPAS system to determine if a hand is on the steering wheel and sends the data to the IPMA. If the IPMA detects that the driver's hands are off the wheel for more than a few seconds, the hands-off warning is generated.

The hands-off warning is generated in 2 levels. The first level is a message center warning only and is triggered after 3 seconds of hands-off driving is detected. The second level warning consists of a message center warning and an audio chime and is generated after 6 seconds of hands-off driving.

NOTE: Due to certain road conditions and the driver's individual grip/touch on the steering wheel, the system may generate a hands-off warning when hand(s) are still on the steering wheel.

Camera Windshield Defrost Heater

The camera windshield defrost heater keeps the windshield in front of the IPMA clear of frost and ice. The IPMA uses input from the front camera and the ambient air temperature to turn the camera windshield defrost heater on and off. Voltage and ground is supplied to the heater by the IPMA. The heater may be commanded on if the ambient temperature is below 41 °F (5 °C).

System Display

When the lane keeping system is turned on, an overhead graphic of a vehicle and lane markings is displayed in the message center display. If the lane keeping aid mode is selected when the system is on, a separate icon will also appear in the IPC. When the system is off, the lane marking graphics are not displayed. The overhead vehicle graphic may still be displayed if adaptive cruise control is enabled. While the system is on, the color of the lane markings change to indicate the system status.

Gray: Indicates the system is temporarily unable to provide lane keeping aid or alert activation on the indicated side(s). This may be caused by:

The vehicle speed is under the activation limit
High sunload on the IPMA camera lens
Too close to lane markings
Lane markings are too narrow or wide
Road has no or poor lane markings in the camera field-of-view
Following vehicle in front too closely
IPMA camera blocked
Windshield dirty or damaged
Standing water on road
Environmental conditions (significant sun angles, shadows, snow, heavy rain or fog)
Turn signal is active
Vehicle is in a dynamic maneuver
Tight curves on the road

Green: Indicates the system is available or ready to provide a lane keeping aid or alert activation on the indicated side(s).

Yellow: Indicates the system is providing or has just provided a lane keeping aid activation.

Red: Indicates the system is providing or has just provided a lane keeping alert activation.

Message Center Settings

The system has 2 optional setting menus available through the Driver Assist menu in the message center. The last-known selection for each setting is stored by the IPMA and does not need to be set again after the key is cycled.

The Mode setting allows the driver to select which of the system features will be enabled and turned on when the button is pressed. The 3 options in this menu are:

Lane Keeping Alert only - provides a steering wheel vibration when an unintended lane departure is detected.
Lane Keeping Aid only - provides steering input toward the center of the lane when an unintended lane departure is detected.
Lane Keeping Alert and Lane Keeping Aid - provides both a warning and steering input towards the center of the lane.

The Intensity setting allows the driver to select the intensity of the steering wheel vibration used in lane keeping alert mode. This setting does not impact the lane keeping aid mode. The 3 options in this menu are:

Low
Normal
High

NOTE: The steering wheel performs a test vibration after the intensity setting is changed through the Driver Assist menu in the message center.

Camera Alignment

Camera alignment is required for the lane keeping alert and lane keeping aid to function correctly. The procedure is initiated using the diagnostic scan tool and requires about 10 minutes of driving above 40 mph (64 km/h) to complete.

NOTE: The alignment completion is indicated on the diagnostic scan tool. If the alignment is unsuccessful, check the interior mirror for proper installation.

NOTE: The FRONT CAMERA MALFUNCTION - SERVICE REQUIRED message in the IPC disappears when the system is aligned.

The IPMA camera alignment procedure should be performed when any of the following occur:

Windshield replacement
Change in tire size
Suspension repair or alignment
Front air bag deployment
Interior mirror replacement