"Radar Cruise Control Not Available" message -- diagnose issue myself?
#1
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"Radar Cruise Control Not Available" message -- diagnose issue myself?
Recently purchased a 2017 GS 350 (F Sport). Everything has been wonderful for the past ~month or so, including the radar cruise control. However, last weekend I was on a longer drive and the radar cruise control turned off after ~3 hours with the "Radar Cruise Control Not Available" warning and yellow triangle. (It didn't say "clean sensor".)
Weather was clear and HOT, around 100F+. I washed the car since (there were a lot of bugs on the grill) and have tried it again a few times and I'm still getting the error. Is there any way for me to look and see myself what the problem might be (I don't have a diagnostic cable), or do I need to go into a dealer directly to have it looked at?
Weather was clear and HOT, around 100F+. I washed the car since (there were a lot of bugs on the grill) and have tried it again a few times and I'm still getting the error. Is there any way for me to look and see myself what the problem might be (I don't have a diagnostic cable), or do I need to go into a dealer directly to have it looked at?
#2
Lexus Champion
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Most Scanners should be able to tell you there is a problem. I would try cutting everything off in the car, then disconnecting the battery for 15mins then reconnect then drive and see what happens. I have also see where it was the Lasers needing realigned, (not sure if this is a Laser one?), some it was just the switch itself gone bad.
Last edited by jgscott; 07-05-23 at 12:23 PM.
#3
I'd start off with checking the module and connection itself. You should be able to access it by removing the top access panel (there should be 11 push clips to remove all the front panels).
Make sure connection is solid, leads don't look corroded, etc.
And ditto on the battery disconnect (for a few mins). Have your key in the car and door unlocked (or windows down) when you reconnect. Once reconnected, press the ON button (but don't start the engine) and let everything (start up). Then try starting the car.
Make sure connection is solid, leads don't look corroded, etc.
And ditto on the battery disconnect (for a few mins). Have your key in the car and door unlocked (or windows down) when you reconnect. Once reconnected, press the ON button (but don't start the engine) and let everything (start up). Then try starting the car.
#4
Advanced
I had this issue right after buying my car. It was L certified and literally happened to me on the way home from the dealer, so I called them up. They took care of it, said they did the calibration or alignment process on the sensor for the adaptive cruise. Has worked fine since. Not sure how much it would normally cost because it was covered.
#5
I had this issue right after buying my car. It was L certified and literally happened to me on the way home from the dealer, so I called them up. They took care of it, said they did the calibration or alignment process on the sensor for the adaptive cruise. Has worked fine since. Not sure how much it would normally cost because it was covered.
#6
Advanced
With Lexus you can use regular cruise control even if radar malfunctions. I think you hold the on button. Probably still throws the error message before you go to regular cruise though, if that bothers you. Maybe Audi also has a bypass to old style cruise.
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#8
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I wanted to quickly follow-up since I super appreciate the instructional advice (and also just in case someone finds this in a google search in the future): The radar cruise control just randomly started working again two days later before I had a chance to open it up and take a look (was planning to do it over the weekend since it wasn't urgent).
The change of functioning was correlated to the temperature dropping from 100+ to the 90 range. I don't necessarily think it was related, but it's maybe an interesting coincidence.
It's going to be 108 this weekend though, so if I'm forced to do any driving, we'll see if it goes out again! I'm guessing since it's intermittent it's probably more likely a loose connection than "it's too hot outside" though.
The change of functioning was correlated to the temperature dropping from 100+ to the 90 range. I don't necessarily think it was related, but it's maybe an interesting coincidence.
It's going to be 108 this weekend though, so if I'm forced to do any driving, we'll see if it goes out again! I'm guessing since it's intermittent it's probably more likely a loose connection than "it's too hot outside" though.
#9
Lexus Test Driver
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I wanted to quickly follow-up since I super appreciate the instructional advice (and also just in case someone finds this in a google search in the future): The radar cruise control just randomly started working again two days later before I had a chance to open it up and take a look (was planning to do it over the weekend since it wasn't urgent).
The change of functioning was correlated to the temperature dropping from 100+ to the 90 range. I don't necessarily think it was related, but it's maybe an interesting coincidence.
It's going to be 108 this weekend though, so if I'm forced to do any driving, we'll see if it goes out again! I'm guessing since it's intermittent it's probably more likely a loose connection than "it's too hot outside" though.
The change of functioning was correlated to the temperature dropping from 100+ to the 90 range. I don't necessarily think it was related, but it's maybe an interesting coincidence.
It's going to be 108 this weekend though, so if I'm forced to do any driving, we'll see if it goes out again! I'm guessing since it's intermittent it's probably more likely a loose connection than "it's too hot outside" though.
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jgscott (07-12-23)
#10
I had problems with the radar cruise several months ago. I ended up spraying WD-40 on a napkin and wiping down the threads of the gas cap. Screwed the gas cap back on and haven’t had the same problem since.
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bclexus (08-15-24)
#14
#15
Intermediate
Mine just pop up with the same message. Is there away to recalibrate this DIY? Or its take it to Lexus dealer?
I'm going to take the cover off on the weekend to see if there is anything there that needs to be dusted and cleaned like spider webs etc.
I'm going to take the cover off on the weekend to see if there is anything there that needs to be dusted and cleaned like spider webs etc.
Last edited by gripau1; 08-14-24 at 01:43 AM.