This bulletin applies to 2010-2017 Lincoln MKS vehicles equipped with adaptive cruise control and collision warning radar, providing set-up and completion steps for proper horizontal alignment of the cruise control module (C-CM) radar sensor.
Check DTCs, tires, cruise control module attachment/vertical alignment. Refer to workshop manual section 419-03. If any DTCs are found in an on-demand self-test of the C-CM, the horizontal alignment procedure may not run or may abort. If the C-CM (radar sensor) is detached from the bracket on one or more nylon ball socket joints, it must be re-attached and leveled per the workshop manual prior to performing the horizontal alignment procedure.
Once the C-CM calibration procedure is activated, a message will appear in the dual display instrument cluster. The vehicle must be driven in the same key cycle. If a key cycle or power loss occurs before completion of the alignment procedure, the sensor will exit the procedure. The message will change to “adaptive cruise not available” for dual display clusters.
If the vehicle does not have the original equipment tires, check that the tire size matches what is programmed in the PCM. If there is a mismatch, the adaptive cruise control alignment process may not complete, or the customer may experience stuttering or surging during usage of the cruise control. Upon successful completion of the alignment procedure, the “front sensor not aligned” message will clear and normal instrument cluster display will resume. For older clusters, the amber light will cease blinking.
While driving the vehicle during horizontal alignment mode, the radar is constantly scanning for stationary targets. Once it detects enough targets (around 250) it will align and the “front sensor not aligned” message will disappear from the cluster. Note that driving in areas with more stationary metallic objects will align the radar faster than in areas with fewer metallic objects.