Beyond the Scan: Solving Calibration Challenges Without Diagnostic Trouble Codes

2019 Mazda 3 Blind Spot Radar Calibration


A 2019 Mazda 3, equipped with advanced safety features including a Blind Spot Warning System, was brought to Smart AVR for calibration. The vehicle's owner, concerned about the system's erratic behaviour, sought a solution to ensure the safety and reliability of this critical safety feature.

Issue Identification:

Upon inspection, our expert technicians discovered that the Blind Spot Radar would not calibrate successfully despite multiple attempts. Notably, there were no Diagnostic Trouble Codes (DTCs) present during the pre-scan, and the warning lights on the instrument cluster did not indicate any issues, highlighting the complexity of modern vehicle diagnostics.

Root Cause Analysis:

To uncover the root cause, our technicians meticulously removed the rear bumper to access the wiring and blind spot modules. It was then determined that the mount bracket for the LH side module, responsible for securing it to the bumper, was broken. This structural issue resulted in an incorrect mounting angle of the blind spot radar, potentially leading to misleading and inaccurate warnings to the driver.

Solution Implementation:

Understanding the criticality of the situation, our team swiftly replaced the broken mount bracket with an OE-spec component. Following this, a meticulous calibration process was undertaken to ensure the Blind Spot Warning System functions accurately.

Outcome and Road Test:

Post-repair, the vehicle underwent extensive road testing to validate the accuracy and reliability of the Blind Spot Warning System. The results were reassuring, with the system performing as intended, providing the driver with accurate and timely warnings of potential blind spot hazards.

Expert Insights and Recommendations:

This case underscores the importance of thorough diagnostics and calibration for modern vehicles equipped with ADAS components. Even in the absence of visible faults or warning indicators, regular maintenance and calibration are essential to ensure the safety and performance of these systems.

Industry Expertise and Best Practices:

At Smart AVR, we pride ourselves on our industry-leading expertise in ADAS calibration and automotive diagnostics. Our commitment to excellence ensures that vehicles leaving our facility meet or exceed OE specifications, providing peace of mind to drivers and workshop owners alike.


This case study exemplifies our dedication to providing high-quality, reliable ADAS calibration services. By leveraging our expertise and industry knowledge, we were able to diagnose and resolve a complex issue, highlighting Smart AVR as the go-to partner for insurance assessors and panel shop owners seeking expert ADAS solutions.

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