lexman52

So when i step on the brakes to slow down its like i slam them down. The second i touch them they lock up.Whats up?

Anfanger

Did it just start happening or you always had it?

lexman52

Went out for breakfast when i left it started. Very hard to drive. Just touch the brake pedal it like u slammed on them. Will not slow down.

Anfanger

Do you have any drag from brakes while driving? If you recently serviced your brakes double check your work.

lexman52

No dragging. Wheels spin good. Maybe master cylinder?

Striker223

Do an offset relearn? The system doesn't really have a connection to the pedal in the traditional sense, it uses a sensor to determine how much brake force you want. If it's out of calibration or broken it may give too much as a failsafe

THE_CEO

What year is your Lexus?

lexman52

2010 460L air shocks

lexman52

How do u do that?

swfla

iTrader: (1)

A simple reset is disconnecting the battery for 15 minutes. The cpu will reset to factory, you then drive the car a few days for it to relearn your driving style. It may fix the brake issue. Like Striker said, the brake pedal pushes/pulls an electronic switch. That may be bad. While the symptoms aren't typical to indicate a brake booster/valve body fail, it could be that as well. Nothing is simple in these cars.

miket000

Interesting failure...
I believe this is what Striker was referring to, specifically the linear valve offset procedure. It's a little more involved than disconnecting the battery. If that doesn't work I'd grab a big hammer and smack the brake actuator

https://www.clublexus.com/forums/ls-...-messages.html

Striker223

My car was working "normally" before I did 5 flushes and two offset learns.......however afterwords it went from having IMO worse peddle feel than my 430s and A8 to exactly on par with the A8. I was not expecting a difference but I most certainly got one.