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Lane Keeping System Operation

The lane keeping system is turned on and off using the lane keeping system switch on the LH steering column multifunction switch. The last known on/off setting for the lane keeping system is recalled any time the ignition is cycled OFF then ON. When a MyKey® is in use, the system defaults the lane keeping alert mode to on at each ignition cycle. When the system is on, it is active only when the vehicle speed is above 65 km/h (40 mph) 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.

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

Lane Keeping Alert 

The lane keeping alert generates vibration through the steering wheel when an unintended 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 an unintended 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.

IPMA Camera Heated Windshield Element 

The IPMA camera heated windshield element keeps the windshield in front of the IPMA clear of condensation, frost and ice. The IPMA can activate the IPMA camera heated windshield element at any time. The IPMA uses input from the camera to determine when to request the IPMA camera heated windshield element on and off. When the IPMA detects that the image from the camera has not changed for a predetermined amount of time, based on statistics and object detection capabilities, the IPMA determines that the camera is blocked and sends the camera heater request message to the BCM. The BCM supplies ground to the BJB front window defrost relay based on the camera heater request message from the IPMA. The BJB front window defrost relay then provides voltage to the IPMA camera heated windshield element.

System Display 

When the lane keeping system is turned on, an overhead graphic of a vehicle and lane markings is displayed in the IPC message center. If the lane keeping aid mode is selected when the system is on, a separate icon also appears in the message center. 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 a lane keeping aid or alert activation on the indicated side(s). This may be caused by:

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 ignition is cycled.

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

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:

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 driving for a distance of 1-10 km (1- 6 miles) above 65 km/h (40 mph) to complete. If the alignment is unsuccessful, check the IPMA for proper installation. The IPMA camera alignment procedure should be performed when any of the following occur:

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