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bill sachs
New User

Mar 14, 2021, 3:56 PM

Post #1 of 6 (773 views)
brake pedal Sign In

 Hi, I'm a first timer. I have a 2010 Town and Country, 3.8 liter with 101,000 miles. My break pedal is fine until the ABS is activated or I hit a really bumpy road. Then the pedal will sink quite a lot. After a few minutes the pedal returns to normal. I had the brakes professionally bled twice with the ABS activated. Do you know what could be causing this? Thanks


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 14, 2021, 5:56 PM

Post #2 of 6 (751 views)
Re: brake pedal Sign In

If the ABS is activating, then it is normal for the pedal to drop.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Mar 15, 2021, 12:39 AM

Post #3 of 6 (732 views)
Re: brake pedal Sign In

Q: Bill > you said it's activating even on a bumpy road or otherwise. Can you say it's justified to "activate" for the conditions? Roads can really stink here or there and or are slippery enough wet or other type of slippery for most drivers (I'm a driver as well as a tech) ice from left over, current snows and re-freezes is neve the same scene.
I don't think master cylinders do well nor other hydraulics for ABS if needed too much it will fail and need some serious bucks in parts or learn to drive without it but have proper working brakes.
Other issue is I don't find brakes work all too well on second part of their legal life of pads and rotors! That and if you drive assorted vehicles this brilliant idea of ABS isn't so brilliant on wet ice you lose pedal and fly thru intersections or watch others do the same, all 4 wheels locked up the thing doesn't know it's even moving if wheels aren't turning despite the vehicle is?


Not sure this idea was so brilliant from the get go owned an experimental 1968 Olds with ABS that worked discontinued NOT to go into production TMK the parts intended for Corvettes but can't know that.
Back: This van probably needs a brake job even if they appear not worn out enough??


T



bill sachs
New User

Mar 16, 2021, 7:33 PM

Post #4 of 6 (703 views)
Re: brake pedal Sign In

I should have mentioned in my first post that when the ABS activates the pedal goes almost to the floor, this is quite unsettling. The pedal will not pump back up. After a short amount of time the pedal will be normal again all on it's own. The bumpy roads that can cause the ABS activation are totally dry. Also the ABS light is not on.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Mar 17, 2021, 12:14 AM

Post #5 of 6 (689 views)
Re: brake pedal Sign In

"To the floor" sure is quite unsettling as you put it!
It's been professionally bled I would hope some basics ruled out, apparently not. Does the ABS light work? Key to just run, without engine actually running is a bulb check for most all cars - things out there.
That has to work, if not why not? If you got this used IDK maybe it was poked out shouldn't escape a code reading something is wrong with the circuit.


Back to this pedal to the floor crap. I/we are techs, don't drive every flipping vehicle ever made are NOT going to know every tiny behavior of each to say NORMAL or not.


I've driven tons of Caravans, one with a Mitsubishi engine (WHAT?) but yes it had one from new. Others, cargo versions all cardboard inside to the luxo-boat ones by assorted names "Grand Caravan" - "Town and Country" the same idea on that platform.
This and other makes will put pedal to floor if you play with ABS in a couple pushes you get NOTHING but screaming before the big crash. IF YOU CAN, READ OWNER'S MANUAL for use of ABS equipped vehicles IS UNIQUE for each sometimes! OMG, what do they expect if you drive assorted vehicles?


On a RANT - this stuff is nuts. They don't normally behave the same way and absolutely can do this this crap on dry roads then show nothing is wrong.
I may come back with an edit to this but for now suggest you go to a dealer for this van and have it checked. This isn't acceptable just may be on some hidden recall list unknown and they should find it?


Good luck, you have a valid complaint and problem so far unsolved via the web anyway,


Tom



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 17, 2021, 4:58 AM

Post #6 of 6 (682 views)
Re: brake pedal Sign In

It should pump back up immediately. There could be a problem with the ABS valve unit but that should be checked out professionally before replacing it. It's quite expensive.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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