Pre Collision Camera

[Bernard Foy]

Was attending a soccer match tonight and the temperatures were-2Cel so I immediately noticed a red warning symbol showing the pre-collision system is off and also noticed that the automatic headlights dipping system didn’t work either. But after driving a couple of miles on the way home it righted itself. I just put it down to the frost possibly cause a problem for the camera, because I directed the heating towards the windscreen. Any of you guys who are more savvy than me tell me if I was correct in assuming that. Or has anyone had a similar experience.??

[Hornet3D]

The hand book gives a few example of when the PCS may not be available, one is if the area around the sensor is cold as in a extremely cold environment and another cause can be when the windshield is fogged up or covered with condensation or ice.    I guess they mean the area in front of the camera being fogged up and therefore blocking it's vision.

I wonder if the same camera is used to 'see' oncoming vehicles,if ti does then that would explain the auto dippig malfunction as well. 

[G L J]

I had the same symptoms the other morning when the car had a thick layer of frost on it. The Lane assist and the speed sign indicator failed to work. 

I also assumed it was frost as it cleared when the car warmed up.

[FROSTYBALLS]

We had something similar occur once on our i20 where the windscreen misted up quite badly in foggy weather - so it isn't just limited to Toyota models. 

[Hornet3D]

Which seems to suggest that this is normal if the camera involved has a restricted view, which makes sense really.

[Big_D]

I've also had this in cold weather 

[Starensis]

The front screen camera is used for LDW, AHBA and RSR. Adaptive cruise uses radar behind front grille. At least that’s what they were 2 years ago before I left the industry. 😬

[flash22]

The camera has a heater, it takes a while to warm up, the reason for the warning is the camera was unable to see