Staff Answer
Jul 28, 2026 - 04:27 PM
Millimeter-wave radar transceiver modules mounted behind the rear bumper corners are blocked or misaligned.
Key Specifications:
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Sensor Location: Blind spot radar modules inside the left and right rear bumper fascias.
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Radar Frequency: Millimeter-wave bands.
How to Diagnose It:
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Inspect the rear bumper quarter panels for mud, heavy dirt, or ice buildup.
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Scan the Blind Spot Monitor Master Module for alignment and communication codes.
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Check if the rear bumper has a physical shift from a minor parking impact.
How to Fix It:
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Wash the rear bumper thoroughly with soap and water to clear radar blocking grime.
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Remove the interior trunk or bumper trim to straighten and re-torque the sensor mounting brackets.
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Run the Blind Spot Radar Calibration procedure using an advanced scan tool.
For comprehensive troubleshooting steps, fluid capacities, and part cross-references, visit the https://www.autouserguide.com/toyota/...
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