ADAS Calibration and Repair Flashcards

A technician is performing a static ADAS calibration for a forward-facing camera. Which of the following is an essential environmental requirement for the service bay?

Answer: A floor that is level within OEM specifications.

OEM procedures for static ADAS calibration require a controlled environment. A critical requirement is a level floor, as an unlevel surface can affect the vehicle's position and orientation, leading to an inaccurate calibration of the sensors and cameras. Bright sunlight, reflective surfaces, and background clutter can interfere with the camera's ability to correctly see the targets and must be avoided.

After completing a four-wheel alignment on a vehicle equipped with ADAS, which of the following is the MOST critical next step?

Answer: Check for and perform any required ADAS calibrations.

Changing the vehicle's alignment, specifically the thrust angle, directly impacts how the ADAS sensors, particularly forward-facing cameras and radar, perceive the vehicle's direction of travel. Many OEMs mandate that an ADAS calibration be performed after a wheel alignment to ensure systems like Lane Keep Assist and Adaptive Cruise Control function correctly and safely.

A vehicle requires a dynamic calibration of its lane-keeping assist system. Which of the following is a typical requirement for this procedure?

Answer: Driving the vehicle under specific conditions, such as at a certain speed on well-marked roads.

Dynamic calibration, by definition, requires the vehicle to be in motion. The procedure involves driving the vehicle under OEM-specified conditions, which often include certain speeds and clearly marked roads, allowing the system's sensors and cameras to calibrate using real-world data. The other options describe requirements for static calibration.

During a pre-repair scan on a late-model vehicle with minor front bumper damage, no ADAS-related DTCs are found. Why might a calibration of the forward-facing radar sensor still be required?

Answer: The sensor may be misaligned from the impact even without setting a code.

A physical impact can easily knock a sensor out of its precise alignment without causing an electrical fault that would trigger a Diagnostic Trouble Code (DTC). Because ADAS features rely on exact sensor positioning for accuracy, OEM procedures often require calibration after a collision, regardless of whether DTCs are present, to ensure the system functions safely.

Which of the following repair events MOST commonly triggers the need for a forward-facing camera calibration?

Answer: Windshield replacement.

The forward-facing camera is typically mounted to the windshield. When the windshield is replaced, the camera's position and angle are altered. To ensure the accuracy of systems that rely on this camera, such as lane departure warnings and automatic emergency braking, a calibration is required. This is the single most common trigger for this type of calibration.

A technician is setting up for a static calibration of a vehicle's blind-spot monitoring system. According to most OEM procedures, what step must be performed on the vehicle itself before positioning the targets?

Answer: Removing all cargo and ensuring tire pressures are set to specification.

OEM procedures often specify vehicle prerequisites to ensure the ride height and vehicle level are correct before starting calibration. This typically includes setting the tire pressures to the placard specification and ensuring the vehicle is in an unloaded state by removing any significant cargo from the passenger cabin or trunk. These steps ensure the vehicle's stance is neutral and matches the conditions under which the system was designed to operate.