I-CAR - Inter-Industry Conference on Auto Collision Repair Certified ADAS Calibration and Repair Questions and Answers — Questions and Answers
Question 1: 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?
- Bright, direct sunlight to ensure maximum target visibility.
- A floor that is level within OEM specifications. (Correct answer)
- Reflective surfaces behind the targets to amplify the pattern.
- Any available open space, regardless of background clutter.
Correct 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.
Question 2: After completing a four-wheel alignment on a vehicle equipped with ADAS, which of the following is the MOST critical next step?
- Test drive the vehicle to ensure it drives straight.
- Perform a dynamic calibration of the rear-view camera.
- Check for and perform any required ADAS calibrations. (Correct answer)
- Clear all diagnostic trouble codes (DTCs) from the system.
Correct 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.
Question 3: A vehicle requires a dynamic calibration of its lane-keeping assist system. Which of the following is a typical requirement for this procedure?
- Setting up specific patterned targets in front of the vehicle.
- Driving the vehicle under specific conditions, such as at a certain speed on well-marked roads. (Correct answer)
- Having the vehicle remain stationary in a bay with controlled lighting.
- Placing the vehicle on an alignment rack to ensure it is perfectly level.
Correct 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.
Question 4: 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?
- A pre-repair scan is not necessary if there are no warning lights.
- The sensor may be misaligned from the impact even without setting a code. (Correct answer)
- DTCs for ADAS will only appear after the repairs are completed.
- Calibration is only necessary when the bumper is replaced, not repaired.
Correct 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.
Question 5: Which of the following repair events MOST commonly triggers the need for a forward-facing camera calibration?
- Tire rotation.
- Oil change.
- Windshield replacement. (Correct answer)
- Rear bumper cover replacement.
Correct 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.
Question 6: 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?
- Over-inflating the tires by 10 psi.
- Disconnecting the vehicle's 12-volt battery.
- Ensuring the vehicle has a full tank of fuel.
- Removing all cargo and ensuring tire pressures are set to specification. (Correct answer)
Correct 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.
I-CAR - Inter-Industry Conference on Auto Collision Repair Certified ADAS Calibration and Repair Questions and Answers
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?