7 Step ADAS: Radar Alignment on 2020 Toyota Corolla
Precision Radar Setup Using Tire Pressure, Target Height, and 7 Step Geometry
Intro To This Calibration
In this live calibration session, we perform a radar alignment on a 2020 Toyota Corolla using the 7 Step ADAS method. This session highlights how critical tire pressure, target height, and initial geometry setup are for vehicles with fixed-mount radar sensors — where no bracket adjustments are possible.
Watch how slight changes in setup influence beam deviation, and how to correct issues without replacing components.
Background
The 2020 Toyota Corolla’s radar sensor is a fixed-mount system, meaning it has no mechanical adjustments available for beam angle or tilt. Successful alignment depends entirely on preparation and layout accuracy.
We explore:
- Target height sensitivity at the recommended 850mm level
- Tire pressure’s effect on beam reading
- The importance of laser-verified left line geometry
Preparation and Setup
We completed the first five steps of the 7 Step ADAS Method before beginning calibration:
- Tire Pressure Verification – Confirmed before setting baselines.
- Rear Plumb Bob Setup – Established rear center reference.
- Left Side Line Laser Alignment – Using laser and square for vehicle side geometry.
- Front Line at 3000mm – Front cross-line set exactly to specification.
- Target Placement on Centerline – Positioned using laser sight lines.
Additional checks:
- Target height set at 850mm, matching the Toyota specification.
- Beam axis deviation reading taken before any software calibration attempt.
Results and Observations
- Initial Setup
- Tire pressure was correctly set.
- Target placed exactly on centerline at 850mm.
- Deviation Reading
- Initial beam axis deviation reading was slightly outside ideal, despite perfect geometric setup.
- Testing Target Height Variations
- Raising and lowering the target marginally affected deviation, but sensor behavior indicated minimal sensitivity to height.
- Final Resultion
- Even with all geometry verified, physical radar sensor position may be slightly shifted due to bumper deformation, factory tolerance, or bracket tension.
- The software allowed calibration, but without physical adjustment ability, spec-based perfection was unachievable.
Conclusion
This session demonstrates that when dealing with fixed-mount radars like on the 2020 Corolla, your initial 7 Step setup determines success.
Tire pressure, target placement, and precise laser alignment are critical — especially when no hardware adjustment options exist.
By applying the 7 Step ADAS Method, we ensured minimal deviation and successful calibration readiness, without any additional parts, resets, or bracket adjustments.