Diagnostic Doctor 20 The Diagnostic Doctor tackles ADAS camera recalibration This month, the Doctor is tasked with calibrating the ADAS camera in a Hyundai i30 PDE. Advanced Driver Assistance Systems (ADAS) are now standard across most modern vehicles. ADAS relies on accurate data from a front-mounted multi-function camera, positioned behind the windscreen, which actively influences vehicle control. As a result, even small changes to vehicle geometry can significantly affect how ADAS systems behave. That’s why calibration is a safety-critical procedure, not a finishing touch. ADAS cameras work alongside radars, ultrasonic sensors and steering angle inputs as part of a wider sensor fusion network. The camera continuously interprets vehicle position, lane markings, road curvature, distance and object location. Because of this interdependence, the camera’s reference point must match the vehicle’s true centre line and thrust angle. When this relationship changes – even slightly – the system’s interpretation can be skewed. self-calibration to compensate for wear over time. Once that wear is corrected – such as during a wheel alignment – those learned values must be reset using an approved calibration routine. When is camera recalibration required? For the Hyundai i30 PDE, Service Point Target Auto Calibration (SPTAC), which is available on Snap-on tools, is required in the following scenarios: O After a windscreen replacement O After steering or suspension component replacement affecting wheel alignment O Following a wheel alignment procedure O When camera self-learning tolerances need to be reset A common assumption is that if the camera itself has not been touched, calibration is unnecessary. However, when alignment is corrected back to a ‘zero wear’ condition, the camera must be recalibrated to match that reference point. Even minor misalignment at the camera can translate into significant errors at road speed. The result may be steering assistance that fights the driver during cornering, inconsistent lane-keeping behaviour and, of course, reduced confidence in the vehicle’s ADAS features. These concerns are often blamed on the technology itself, when the real issue is an incomplete repair process. Creating the right environment Successful ADAS calibration depends not just on the tool, but on the workspace. Key considerations include adequate space for target placement, consistent, even lighting, a level workshop floor, and a clear line of sight between the camera and the target For the Hyundai i30 PDE, the Doctor chose the SUN EZ-ADAS Recalibration System. It supports accurate target placement and workshop setup, helping technicians meet OEM requirements with confidence. The system’s guided workflow, combined with manufacturer-specific targets, is designed to reduce setup errors and improve first-time success. Correct calibration sequence matters Accurate ADAS calibration depends on completing each preparatory step in the correct order. Skipping or re-sequencing steps can lead to unsuccessful calibration or, worse, systems that appear calibrated but operate incorrectly on the road. The starting point is to complete a wheel alignment to the manufacturer’s specifications. Wheel alignment is essential and must be completed before any ADAS calibration is attempted. The front camera interprets vehicle direction based on thrust angle, steering angle, and chassis geometry. If the alignment is incorrect – or carried out after calibration – the camera’s reference point will be wrong. Next, it is important to ensure there is no bodywork damage, the windscreen is clean and undamaged, tyres are correctly inflated, ride height is correct, and vehicle loading meets manufacturer requirements. Then the battery must be supported throughout the procedure. ADAS calibration places high electrical demand on the vehicle. Maintaining stable voltage throughout the process is critical. Once these steps have been completed then we can set up the ADAS calibration equipment. In our example, the SUN EZ-ADAS Recalibration System is used to physically perform the ADAS calibration. It provides the calibrated targets, positioning accuracy, and the workshop setup required to meet OEM specifications. Next, a diagnostic tool is used to activate and control the Special Function, guiding the Service Point Target Auto Calibration (SPTAC) process, monitoring progress, and confirming successful completion. A pre-scan confirms system status before calibration, while a final post-scan and road test verify correct operation and ensure no new issues have been introduced. Following this sequence ensures the ADAS system is recalibrated against a correctly aligned vehicle, using the proper
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