PCS [pre-collision system]

My dash warning light is on after snow & ice’d on my tk in 25-30° weather. It’s been on 3+ days now. I can’t turn on or change any settings. The vehicle is clear of the elements now.

 

Welcome. Usually the PCS warning will clear after the sensor has been cleaned and driven a few miles with the clean sensor.

 

Thank you!!!

 

Welcome

 

Had this turn on for me driving the PA turnpike on saturday. Wiping away all the snow/slush had it back in order.

 

Welcome aboard!

 

Welcome from the center of the bourbon universe.

 

I’ve noticed in heavy rain the pcs unavailable warning will come on. Seems to clear up fairly quickly.

 

New here. Ran into a similar problem where in heavy weather my PCS would disable while driving. I have a 2021 4runner SR5. This past fall the system was disabled for the majority of November. My frustration is that the cruise control would not function. I started to look in to see what the issue might be. I found the wire harness behind the sensor was full of water. So much that it started draining onto my leg when I pulled it out. I didn't see any issue with the loom or with any of the connectors so I was confused why so much water was in there. I dried the harness out I inspected it for corrosion it seemed to be OK. When i reinstalled it i used heavy electric tape. Home Depot sells some that is rated for outdoor use. Needless to say I wrapped the **** out of it connectors and all. We've had some heavy rain and snow in the Chicago land area since then. No problems whatsoever. I didn't need to replace the harness or the sensor or anything. I figured I would put this out there so that frustrated owners have something look for when troubleshooting.

 

Interesting, my PCS alert just showed up for the first time yesterday, a couple times in very heavy rain but also went away not long after.

Just in case, you can revert to “classic” cruise by holding down the cruise button and I personally use it more due to my sense (unconfirmed) that adaptive cruise is a bit too brake happy.

 

You can unplug it and clean it up as well.