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Does changing a vehicle’s ride height impact ADAS?

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LIMITED PROTECTION POLICY original vehicle design, the systems need to be recalibrated. This can be somewhat tricky as there are no OEM repair procedures for recalibrating a vehicle with a modified ride height.

The other thing to keep in mind is that even removing the front bumper cover, adding a bumper guard, changing the grill or replacing the windshield will potentially require a recalibration of the ADAS.

What are two or three things that tire/wheel installers need to know about ADAS?

Zenteno (Autel): As mentioned before, when you alter the vehicle’s position or direction of travel, you are altering the system’s performance and response time.

There are many scenarios that can lead to malfunctions — for example, a truck that had a lift kit installed and now the adaptive cruise control no longer detects the vehicle in front of it due to the new position of the forward-facing radar; the vehicle that was recently aligned and the ACC kept braking because the forward-facing sensor was seeing the vehicle in the lane beside it, thinking it was directly in front; or the lane departure system that was warning too early.

McKinney (Bosch): ADAS are vehicle technologies designed to improve driver safety by assisting drivers on the road.

A few examples include lane-keeping assist, automatic emergency braking and the very common rear back-up camera, which has been required on all new vehicles under 10,000 pounds since 2018.

ADAS technology works through the combination of cameras and sensors to collect and process information to assist in a safe driving experience.

Recalibrating ADAS sensors can be quite difficult as electrical signals from other components in a vehicle may interfere with the tech.

This can make it appear that the ADAS sensor has an issue when this may not be the case — causing confusion and frustration for technicians who are unfamiliar with recalibration techniques. When recalibrating a sensor, it’s best practice to determine the working status of other sensors in the vehicle to eliminate the possibility of electrical signals from other components interfering.

Gerber (Hunter): ADAS is an opportunity to increase driver safety, as well as an opportunity to realize a new revenue stream. Like all new technology, there is a (learning) curve, and it’s not altogether difficult. ADAS is now mandatory with automatic emergency braking (AEB), so it is on all cars.

Krebs (Snap-on): ADAS stands for advanced driver assistance systems — with the key word being “assistance.” These systems are only a partial solution for automated driving. When it comes to vehicle driving automation, there are six levels:

• Level Zero: No automation whatsoever;

• Level 1: Mode-specific minor assistance of steering, braking or accelerating;

• Level 2: Mode-specific increased assistance or takeover of steering, braking and accelerating;

• Level 3: Mode-specific automated driving of all dynamic tasks with human intervention, when requested;

• Level 4: Mode-specific automated driving of all dynamic tasks, even when human does not respond, and;

• Level 5: Full-time automated driving under all road/ weather conditions, without the need for any human interaction.

There are two types of ADAS on cars today: active and passive. Active systems will work to reduce accidents, such as automatic emergency braking, lane keep assist and automatic cruise control. Passive systems are just there to inform the driver, such as pedestrian recognition, traffic sign recognition, surround view, backup camera and night vision.

Similarly, there are two types of ADAS calibrations for systems on cars today and they vary by manufacturer and model: static and dynamic.

Static calibrations typically take place in a controlled environment — in a shop bay where targets are positioned in key locations around the vehicle and the vehicle is told to initialize a calibration and look for said targets to calibrate. These are most of your Asian import vehicles.

Dynamic calibrations are performed while driving the vehicle in a target-rich environment, but are subject to longer calibration times if there is inclement weather, a lack of traffic or too much traffic. These are most of your domestic vehicles.

TEXA: One essential ADAS calibration lesson is not all calibration systems are created equal.

Daughtery (VSG): Examples of systems are adaptive cruise control, blind spot monitoring, cross traffic alert, advanced collision warning, AEB, lane keep, etc. There are two classifications for these systems: passive and active.

A passive system will simply alert the driver to an impeding situation by giving an audible sound and/or flash a light or display a message.

Examples of these are blind spot warning or lane assist. An active system will actually take some type of action automatically without driver intervention.

Examples of active systems are adaptive cruise control, AEB, lane centering, etc. Since September 2022, every vehicle manufacturer has agreed to make AEB standard on all new vehicles made.

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