2018 Toyota Prius Exterior Lighting

The automatic high beams will occasionally fail to operate and are stuck in low beams until about 2 minutes have passed, or until the automatic high beams switch is turned off to disable the system. This seems to be a software issue, as it seems to occur when an approaching vehicle passes by with bright lights. When this happens, all high beams are disabled for a couple of minutes, even if the high beam lever is switched to low beams and back to high.

AUTO HIGH BEAM FEATURE INTERMITTENTLY CUTS OUT AND THEN RESUMES, ESPECIALLY FREQUENTLY IN RAINY WEATHER. WHILE OFF, I CANNOT ENGAGE THE HIGH BEAM WITHOUT FIRST SHUTTING OFF THE AHB FEATURE. MANY SIMILAR REPORTS REGARDING TOYOTA VEHICLES; SEE HTTPS://WWW.RAV4WORLD.COM/THREADS/AUTO-HIGH-BEAM-ISSUES.242329/

AUTOMATIC HIGH BEAMS DIM AND THEN FAIL TO BRIGHTEN INTERMITTENTLY. WHEN DRIVING, AUTOMATIC HIGH BEAMS FUNCTION AS INTENDED THEN THE DASH INDICATOR SPONTANEOUSLY TURNS OFF AND THE HEADLIGHTS FAIL TO BRIGHTEN. VEHICLE HAS BEEN TO THE DEALERSHIP SERVICE DEPARTMENT TWICE FOR THIS. THE SECOND TIME , THE DEALER WAS ABLE TO DUPLICATE THE PROBLEM BOTH IN MY VEHICLE AND IN A 2019 PRIUS FROM THE INVENTORY. TOYOTA TECHNICAL ASSISTANCE IS ADAMANT THAT THE PROBLEM IS NORMAL FUNCTIONALITY. I FAIL TO UNDERSTAND HOW THE HIGH BEAMS NOT BRIGHTENING WHEN THEY SHOULD DURING NIGHT DRIVING IS NORMAL FUNCTIONALITY.