Hi there. 2017 LS460 SWB RWD needs some help with the windshield washer. One day temperature dropped into the low single digits and my washer fluid started to break down leaving some white residue on the windshield. I flushed it and replaced it but ever since I’m having some weird issue with the windshield washer. Both driver, and the passenger side nozzles spraying low (lower third of the window). I thought something got clogged up and took nozzles and the check valve off, nothing found, nozzles are clean and unobstructed, with nozzles removed flow from the hose appears to be adequate, check valve checked out OK. Still spraying low, feels like not enough pressure. Replaced check valve with the new from the dealer, same thing. Replaced both nozzles. Original nozzles are “neutral”, I’ve installed nozzles +2 degrees up hoping to get better spray aim, almost the same thing. Passenger side got little bit better, driver’s side just making more mess with most of the fluid lands on the lower portion of the windshield and some of it gets on the roof and driver’s door. Any ideas? Maybe some kind of aftermarket solution with adjustable nozzles? Is there any way for the washer pump not to produce full pressure? Appreciate any ideas.

 

Maybe the washer bottle is all gunked up or perhaps the motor. Since the problem started only after the fluid went bad it stands to reason. Replacement motor is not horribly expensive but don't throw parts at the problem until you know what is causing your issue.
https://www.lexuspartsnow.com/parts/...330-60190.html

I've never seen washer fluid break down, what type/brand was it? Seen summer versions freeze of course.

 

Yea, I was looking at new pump, thanks for the link. Not too expensive if it comes to it. I believe it was Prestone Bug Wash. It is summer fluid, which I neglected to dump hoping that I will use it out before it gets below 30. Wishful thinking. LOL.

 

Summer formula in singles digit weather equals freezing damage. It could be anywhere fluid touches. But sounds like low pressure. A leak somewhere or the pump not crating enough pressure.