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Old 10-24-2021, 05:55 PM   #1
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Is RVI System causing lock up?

We have a 2019 Greyhawk 29MV and flat tow a 2017 Chevy Spark with the RVI braking system which the local Jayco dealer ordered and installed for us. On a few occasions, we have had the sensation of the tow vehicle braking when brakes were NOT being applied in the MH. We have only experienced this while in a curve. Not all curves. Not always a hairpin curve. Some while going uphill, some while going downhill, and some on flat, gentle curves while going 60mph. We have contacted RVI and they say it must be a power supply issue from the car to the RVI system, and they suggest having it hardwired in instead of using the plug in to the cigarette lighter. Anyone have any experience with this or input on what else it might be? If it's a supply issue as RVI suggests, why doesn't it happen while going straight as well?
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Old 10-24-2021, 05:59 PM   #2
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I qould say it is a supply issue as well, but is probably a brake wire getting power sending a signal in the umbilical when turning. I would bet there is some wires that are scraped or shorting when the cord stretches on a turn.
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Old 10-24-2021, 06:10 PM   #3
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Thanks for the reply. The power for the RVI system comes from the battery in the toad (via plugin to car's cigarette lighter socket) so not sure what would get stretched in a turn. There is wiring from the MH to the car to keep the car battery charged though.
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Old 10-24-2021, 06:12 PM   #4
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Where does the brake signal come in? Does it not have an umbilical that plugs into the rv and the car?
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Old 10-24-2021, 06:45 PM   #5
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The RVI brake is an inertial/accelerometer based system like many removable units. There is no wired braking signal from the coach.

NewRVforme -

Do you use the tablet? If so, is it showing the unit being activated? It might be worthwhile to have a passenger watch it closely while doing some of the trigger actions and see what it says.

If it is going off when it shouldn’t be, I would suspect

1. The installation - is it staying put? If not that would be a problem.

2. The inertial switch/accelerometer. It could be mis-aligned or loose or just plain faulty leading to non straight-line accelerations incorrectly triggering the device.

3. Who knows…

In any case, give RVi a call! I’ve been using an RVibrake3 for 4 years and have never experienced what you describe.

Regards,

Randy
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Old 10-24-2021, 08:28 PM   #6
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I had a similar problem with my Roadmaster Evenbrake, their tech support suggested extending the front legs on the unit a bit so it will tilt back a little, so has to keep the accelerometer from engaging the brake as easily.
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Old 10-25-2021, 10:25 AM   #7
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Groswald, thanks for the detailed reply and explanation of the system. We have the TPMS system also installed so we have that screen up while driving. Wish we would have thought of checking the brake screen at the time! We will definitely check that when we start camping again next spring. Thanks for the reminder! If we don't come up with other ideas/solutions on the forums we will definitely be getting back in touch with RVI again. Contacting them was our first step along with going into our local Jayco dealer.
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Old 10-25-2021, 12:19 PM   #8
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Quote:
Originally Posted by NewRV4me View Post
Groswald, thanks for the detailed reply and explanation of the system. We have the TPMS system also installed so we have that screen up while driving. Wish we would have thought of checking the brake screen at the time! We will definitely check that when we start camping again next spring. Thanks for the reminder! If we don't come up with other ideas/solutions on the forums we will definitely be getting back in touch with RVI again. Contacting them was our first step along with going into our local Jayco dealer.
Even on the TPMS screen the monitor will tell you if the brakes are being activated.
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Old 10-26-2021, 01:56 PM   #9
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Thanks Airboss68. Can you explain where on this TPMS screen we should be seeing the brakes being activated?
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Old 10-26-2021, 02:15 PM   #10
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When in drive mode, when monitoring tire pressures, I also get an indication when the brakes are activated.
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Old 10-26-2021, 05:55 PM   #11
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As mentioned above you should travel in drive mode. It will show all your tire pressures and when the toad brakes are activated you will see a slider bar on the screen that tells you they are active and how strong the activation is.

Also go here…..

http://https://rvibrake.com/pages/user-guide-downloads

And download a user guide
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Old 10-27-2021, 05:51 PM   #12
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Well, we learned something!! Thank you for the insight! We couldn't make the link work, but I did pull up the tablet and go through the tutorials there. We never drove in 'drive mode'. That will be an easy fix once we start up again next year and will give us the info we need on the brakes while driving. Thank you for that. We just relied on the tutorial the local dealer guys gave us on the system/tablet when they installed it. Newbie mistake.
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Old 10-28-2021, 07:00 AM   #13
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Did you configure the RVi system for your toad? You have to tell it how heavy the toad is so that the accelerometer will work correctly.
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