Variations in manufacturer statements include Ford/Lincoln defining a collision as, “damage that exceeds
minor outer body panel cosmetic distortion.” Similarly, but open to interpretation from Toyota is, “Repairers
should perform a ‘Health Check’ diagnostic scan since a capable scan tool is the only way to identify and
document DTCs (Diagnostic Trouble Code). It is necessary for repairers perform a ‘Health Check’ diagnostic
scan before and after every repair if a vehicle has sustained damage because of a collision.” These potential
gray areas in manufacturer requirements support working with a professional insurance claim adjuster and
the vehicle owner doing his/her own research where possible. Personal research is not as challenging as it
might sound. An internet search that includes make/model/year of the vehicle along with “ADAS components
damaged in front [substitute for your situation] collision” provides a good start to learning more about the
advanced driver safety systems on your vehicle and the calibration procedures that may be required to bring
the vehicle back to full functionality.
2. Wheel Alignment
Many collisions can cause some type of suspension damage, and that means wheel alignment will be
necessary. For ADAS equipped vehicles, these systems need to know what direction the vehicle is travelling
down the road to accurately make safety corrections and predictions.
Vehicles equipped with ADAS, especially lane keeping assistance and automatic emergency braking, need
to be properly aligned with how the vehicle is traveling down the road. This ensures the vehicle thrust line, an
imaginary centerline drawn lengthwise through the car, points straight down the road when the steering
wheel is centered. ADAS sensors are then calibrated to be in alignment with the vehicle’s thrust line.
Cameras and sensors use different inputs from the vehicle, such as inputs from the steering angle sensor. If
the steering angle sensor is adjusted during a wheel alignment, the forward-facing camera, which controls
the lane departure warning, may think the steering wheel is turned. This can signal the vehicle to correct the
steering to stay on the road, even though the vehicle is traveling between the lines. That leads to a
requirement to calibrate the forward-facing camera, which may include all cameras in a 360° view camera
system.
3. Calibration of ADAS Components and Systems
Almost all ADAS sensors require calibration and some, such as forward-facing radars and cameras mounted
behind the windshield, require extremely precise aiming. A tiny misalignment on the vehicle will aim the
sensor significantly off axis 100 or more feet down the road.
Calibration cannot be ignored. Sensors that are out of alignment generate faulty information that will cause
ADAS to operate improperly or not at all—creating a safety hazard. In addition, out-of-calibration sensors
may cause a warning light or message on the instrument panel or driver information screen and/or set a
diagnostic trouble code (DTC) in the vehicle’s computer memory. This DTC is what the pre-repair scan
checks for, and what is expected to be cleared up when the post-repair scan is done.
ADAS sensor calibration is a precision process that requires specialized information from the vehicle
manufacturer, training, tools, and even physical facilities that can be extremely expensive. Exact procedures
vary with the vehicle and sensor type, but most are both complex and time consuming. While some sensors
can be calibrated in the shop, others require that a vehicle be driven under specific conditions, and many
must undergo both processes.