Brake noise? - Page 2 - 2017+ Chrysler Pacifica Minivan Forums
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Old 05-05-2017, 07:45 AM
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Join Date: Oct 2016
Location: Auburn Hills, MI
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Quote:
Originally Posted by vdubpower View Post
so if i have my adaptive cruise control on and the car is coming to a stop under its own power there is a grinding sounds as it slows/stops from the front,e very time...
if i take over and brake myself there are no sounds

no idea wtf
Hi vdubpower,

We'd recommend visiting your local dealership for further diagnosis, since it happens every time Adaptive Cruise Control is on they should be able to duplicate it. You could also offer to go for a test drive with a service technician or advisor so you can demonstrate the conditions when the noise happens. Feel free to PM our page with your VIN if you need assistance!

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Old 05-05-2017, 11:10 PM
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I have a Pac Hybrid and ditto for the same sounds. I would say I hear it more when first starting out in the morning. It seems common regardless of trim.

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DRIVING - 17 Pacifica Hybrid Platinum CDN Granite Grey, Chargepoint EVSE & 240V OEM, Full WeatherTech Sunroof Deflector + Mats, Front MOPAR Mudflaps, Winter RWC 17" + MOPAR TPMS + Michelin Xi2
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Old 05-06-2017, 10:09 AM
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I definitely noticed it when driving with the stereo off.
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Old 05-12-2017, 12:25 AM
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if the dealer tells u this is normal - they are lying - cause in my neighborhood there are a gzillion pacificas, three on my block alone, and i drove a few and they dont make the sound, it sounds like the electric vacuum pump for the power breaks which is in that area, that goes off when the vehicle speed sensor value goes to 0, for many years now, the Vehicle Speed Sensor, "VSS" signal (created by a hall-effect transducer on the transmission) gets fed around to all the computers including the speedometer, and in this case i think it tells the pump when to stop,

the weird noises the car makes when auto-following the car head in start stop traffic with adaptive cruise - those are normal, and using a different breaking circuit, and the transmission is doing rapid down-shifts so lots of noise making mechanical things are happening behind the scenes

by the way : there is a dangerous bug in adaptive cruise - if ur tracking a vehicle in front and u get cut off the computer picks that up perfectly OK, and if the vehicle right in front leaves ur lane it will track the next one perfectly, but only as long as its moving, if its stopped, it will plow right into it!!! even though if u were tracking and it stopped u would stop also , a really dumb bug!!!!
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Old 05-12-2017, 09:27 AM
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Quote:
Originally Posted by iceman View Post
by the way : there is a dangerous bug in adaptive cruise - if ur tracking a vehicle in front and u get cut off the computer picks that up perfectly OK, and if the vehicle right in front leaves ur lane it will track the next one perfectly, but only as long as its moving, if its stopped, it will plow right into it!!! even though if u were tracking and it stopped u would stop also , a really dumb bug!!!!
One of the mods should post a sticky with a collection of these safety issues: e.g. hybrid starting the engine while pre-conditioning in the garage, stow-n-go assist button issue, etc.
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Old 05-14-2017, 10:06 PM
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I believe pretty much no acc systems will pick up a stopped vehicle when the car being tracked leaves your lane. Our bmw explicitly stated that in the manual but I don't remember reading that in the Pacifica manual. For example : https://electrek.co/2016/05/26/tesla...topilot-video/ . Acc is meant to lock onto a car and follow it at a safe distance and that's it. It's not a "stupid bug".
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Old 07-07-2017, 06:42 AM
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i will pick up a vehicle moving 1mph, i think i figured out why, cause it has to ignore stationary object otherwise it will freek when u r going around turns and stationary object appear to be rapidly approaching, this will have to wait until real self driving cars can actually see and discern my system is not that sophisticated,
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Old 07-07-2017, 06:46 AM
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in the end they resurfaced the rotors which cut it down a lot but not completely, i intend to buy my own super high quality rotors as these appear to be junk, they has distortions, and dont want my life depending on them
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Old 07-08-2017, 07:43 PM
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The brake components on the Pacifica are sourced from Brembo (seriously). They are widely regarded as really good by reviewers & owners alike. Sounds like you got some bad parts. Insisting on replacement rather than resurfacing is a reasonable request.
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Old 07-21-2017, 07:44 PM
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I am experiencing a similar issue - the whooshing sound when braking at a stop sign/stop light. I have about 1100 miles on the Pacifica (Touring L) and never had the issue until this week. It started immediately after I put the parking brake on (for the first time that I can recall). I wonder if the parking brake hasn't completely released and is causing the noise somehow?

Would seem strange if this is the case as I can't hear the noise other than when braking but the first time application of the parking brake and this noise suddenly appearing seems too proximate for the two events not to be related.
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