Learn why and how to perform ADAS windscreen calibration with this handy guide.
Why Is ADAS Calibration Necessary?
Advanced driver assistance systems (ADAS) have become standard in modern vehicles. They improve safety through features like lane departure warnings (LDW), adaptive cruise control, and automatic emergency braking systems. Many of these systems rely on a forward-facing camera mounted on the windshield. If the windshield is replaced or the camera is disturbed, the system needs to be recalibrated for accuracy.
ADAS cameras process real-time road data, so even slight misalignments are problematic. Without proper calibration, these systems can:
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Provide incorrect lane departure warnings.
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Fail to accurately detect vehicles or pedestrians.
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Misinterpret traffic signs.
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Incorrectly apply emergency braking.
How to Perform Windshield ADAS Calibration
Manufacturers specify one of two calibration methods depending on the vehicle. Some models require both. Here’s how to approach each one.
Static Calibration
Static calibration is performed in a controlled environment, like a repair shop, with specialized equipment. This method is used when the vehicle manufacturer requires precise positioning of calibration targets in a stable setting.
Considerations
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Must be conducted indoors with adequate space and proper lighting.
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Requires exact measurements for target placement.
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Best suited for vehicles that do not self-calibrate through driving.
Requirements
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A level, indoor workspace with controlled lighting
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OEM-approved calibration targets (charts, boards, or mats)
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A scan tool compatible with the vehicle’s ADAS systems
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A properly inflated set of tires and a full fuel tank for the correct vehicle stance
Steps
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Prepare the workspace: Make sure your shop floor is level and that lighting conditions meet manufacturer specifications. Remove any obstructions in the camera’s view.
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Position the vehicle: Park the vehicle in a designated calibration area and align it according to manufacturer guidelines.
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Connect the diagnostic tool: Use an OEM-approved scan tool to start the calibration process.
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Measure and mark target positions: Use laser tools or measurement guides to set up calibration targets at the exact height and distance required.
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Position the targets: Follow the calibration procedure on the scan tool to position the targets. Make sure the target is at the correct height and angle relative to the vehicle’s camera.
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Run the calibration process: Follow the scan tool’s prompts to begin calibration. The system will make necessary internal adjustments to correct the camera’s position.
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Verify results: Once calibration is complete, the diagnostic tool should confirm success. If errors persist, recheck the target placement and rerun the calibration.
Dynamic Calibration
Dynamic calibration, also known as on-road calibration, requires driving the vehicle under specific conditions to allow the ADAS camera to recalibrate itself. This method relies on real-world driving scenarios for the system to adjust and learn new parameters.
Considerations
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Requires an open road with clear lane markings and minimal traffic.
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Must be performed under proper weather and lighting conditions.
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Works best in daylight with good visibility.
Requirements
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A compatible tool to initiate calibration mode.
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A road with clear lane markings, minimal obstructions, and a stable speed limit.
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A trained technician to monitor the process and maintain compliance with manufacturer guidelines.
Steps
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Connect the scan tool: Hook up the diagnostic tool and enter the ADAS calibration menu.
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Select the calibration mode: Choose dynamic calibration and follow the instructions on the tool’s interface.
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Drive the vehicle: The manufacturer will specify the required speeds and distances (e.g., maintaining 40-60 MPH for several miles). Keep the vehicle steady in the lane and avoid sudden movements.
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Monitor progress: The scan tool will track calibration status in real time. If an error occurs, it will prompt corrective actions. It is helpful to have two technicians, one to drive and the other to monitor the diagnostic tool.
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Complete the process: Once the system confirms successful calibration, stop the vehicle and turn off the scan tool.
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Test ADAS functions: Perform a final test to make sure that all safety features function correctly.
Windshield Camera Calibration Best Practices
Here are a few things to keep in mind as you calibrate ADAS cameras and sensors:
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Follow OEM specifications and always use manufacturer-approved tools and targets.
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Work in proper environmental conditions. Incorrect lighting or an uneven surface can cause errors, especially with static calibration.
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Verify that the ADAS systems work as intended before releasing the vehicle to the customer. Perform a test drive or system check to confirm proper operation.
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Keep your scan tool software updated to support newer vehicle models.
When Do Windshield Sensors Need to be Recalibrated?
Windshield ADAS recalibration is required in several scenarios for optimal system accuracy and safety:
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Windshield replacement: Any time a windshield with an ADAS camera is replaced, recalibration is necessary to make sure the camera is still properly aligned.
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Camera detachment or replacement: If the forward-facing camera is removed or replaced, recalibration is needed to restore accurate system readings.
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Collision repairs: Even minor fender benders can affect sensor alignment and require recalibration.
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Suspension or alignment work: Changes in ride height due to suspension repairs or modifications can alter the camera’s field of view.
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Dashboard warning lights: If ADAS-related warning lights appear, recalibration may be necessary to solve misalignment issues.
Common Calibration Challenges & Troubleshooting
Let’s take a look at a few common issues you might run into while performing windshield ADAS recalibration.
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Misalignment errors: Double-check target placement and vehicle positioning.
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System won’t enter calibration mode: Make sure the scan tool is compatible with the vehicle, its software is up to date, and it’s properly connected to the vehicle.
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Calibration repeatedly fails: Inspect the windshield for improper installation or camera obstructions.
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Environmental interference: Poor lighting conditions, reflections, or uneven flooring can disrupt static calibration.
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Non-ideal driving conditions: If dynamic calibration fails, make sure the test drive meets the manufacturer’s specifications for speed, distance, and road quality.
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ADAS system updates: Some vehicles require software updates before calibration can be performed.
Your One-Stop Shop for ADAS Calibration
Looking to bring ADAS calibration in-house for your repair or collision shop? ADAS Depot provides a wide range of OEM-approved calibration equipment, scan tools, and expert support. We’re ready to help you find the right tools for your shop.
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