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RX - 4th Gen (2016-2022) Discussion topics related to the 2016 and up RX350 and RX450h models

ACC quit in slow traffic?

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Old Aug 27, 2018 | 02:49 PM
  #1  
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guxu
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Default ACC quit in slow traffic?

On my way to work, there is always a section with very slow traffic. Sometimes I turned on ACC and let the RX following the car in front of me. It happened twice on me that after a while, RX displayed something about radar not available with a beep. Then, it cancelled the ACC by itself. I could not even turn back on ACC right after that. But after like 5 minutes, I could turn on ACC and it worked just fine. I thought even if the radar had problem, we still should be able to use "dumb" cruise control, right?
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Old Aug 28, 2018 | 11:51 AM
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Mine has done the same thing a few times. Usually something happened right before to confuse it before canceling like someone cutting in front of me at a very close distance or for some reason motorcycles seem to occasionally cause this too. It seems that it is maybe resetting itself after one of these incidents which is why it is not immediately available?
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Old Aug 28, 2018 | 12:05 PM
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I think you have to engage the DUMB cruise control by holding the button for more than one second. Then it operates the old fashioned way.
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