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Park Brake Message Troubleshooting and Solution

Park brake rev xm xs message diy

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#1 pcontant

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Posted 04 January 2017 - 09:08 PM

If you are getting the 'Park Brake' message on your sled while riding and can't figure out why, then this may help your troubleshooting and may be a solution for you.

Last year I got the 'Park Brake' message a few times on my 2015 Summit 600 ETEC. It would go away by itself. This year it started doing it again. I researched the issue and didn't find much other than it could be a faulty switch, wire or connection. Oddly, the brake light isn't on when this occurs yet the ECM thinks so and displays the message and beeps annoyingly while I ride.

I read that dealers can program the ECM to ignore this feature but this year I decided to troubleshoot this annoying issue further.

After reviewing the wiring diagram and a bit of testing, I found a permanent solution to my problem without spending a dime.

To understand the fix, let me me first explain how the system works.

The brake light microswitch is fed by a battery positive (red wire feed - this feed is also used for the headlights). The output to the switch is a white wire that goes back to the tail light. In fact the microswitch wire colors are brown and grey but becomes red and white at the first connector at the handle bar. I did a continuity test on my switch and all was good. BTW, this freakin microswitch is $65 CDN!

The white output wire runs from the handle bar harness through the main harness to eventually get to the taillight. In the main harness there is a splice and one wire goes to the ECM and the other goes to the taillight. This white wire goes to pin 30 on the ECM connector J1A or pin 25 on an 800 ETEC. When the brakes are off and the microswitch is open, 0v should be present on the white wire going to the ECM and the taillight. When the brakes are pressed and the microswitch contact is closed, +12v (more like 14.4v with mag) is sent to turn on the brake light and informs the ECM the brake is on.

In my case, I did not have 0v when the brakes were off, I had around +5v. At first I thought this a reference voltage such as in the automotive world but latter realized it wasn't. This ghost voltage was giving the ECM indication that the parking brake was on when in fact it was not. I disconnected both the brake light switch and taillight to rule them out and yet there was still a ghost voltage on the white wire. I had no clue where this voltage was coming from and since I could not come up with any logical reason why the ECM needs to know the Brakes are on, the solution was quite simple. Cut the white wire going to the ECM and it will never know when the brakes are on. So that is what I did.

I did a quick Youtube of this for those who want see. Again, note in the video I'm saying the 5v is a reference voltage but that is not the case as I discovered later.

I still plan on verifying the wire run between the handle bar harness all the way to the taillight next time I take the hood off to understand where this voltage is coming from, but for now I'm good to go!

Since this modification I have yet to get the message or an engine code.

Hope this can be of use should this happen to you.




#2 kidinloghouse

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Posted 05 January 2017 - 02:33 PM

thanks for that, i've had the motor lay down because the ecm thought the park brake was on. took awhile to figure out the wires to the micro switch were broke. 


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#3 jordan

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Posted 23 January 2018 - 09:33 PM

I am having the same problem with mine, changed the micro switch  and still having problem.  i am going to cut the wire like you have but just want to check with you to see if everything is still good since you did this.  I also cant see any reason the computer would need to know the brake is on.  Thanks for your help.



#4 pcontant

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Posted 23 January 2018 - 09:38 PM

I am having the same problem with mine, changed the micro switch  and still having problem.  i am going to cut the wire like you have but just want to check with you to see if everything is still good since you did this.  I also cant see any reason the computer would need to know the brake is on.  Thanks for your help.


A1! Never got the message since I cut the wire nor have I encountered any other issue. Fixed the problem permanently.

#5 Sorcerer

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Posted 24 January 2018 - 07:28 PM

Probably rubbing into the tail light wire in the tunnel somewhere. If the ecm sees the 5v, i would imagine the same 5v are beeing sent to the brake light.
So cutting the wire going to the ecm, will not prevent the brake light from still malfunction...


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#6 pcontant

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Posted 24 January 2018 - 09:53 PM

Probably rubbing into the tail light wire in the tunnel somewhere. If the ecm sees the 5v, i would imagine the same 5v are beeing sent to the brake light.
So cutting the wire going to the ecm, will not prevent the brake light from still malfunction...


The short may be in the tunnel but It has no impact on the brake light, it works perfectly.

#7 Gonetfx

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Posted 24 January 2018 - 10:13 PM

Mine was doing this at the end of last season but hasn’t happened yet this season but will know what to do if it comes back thanks


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#8 toomanysleds

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Posted 06 January 2019 - 11:19 AM

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Posted Today, 10:19 AM

Im having this issue and the local dealer says they have never heard of this. does anyone know what the BRP validation code is so i can make them aware? dont want them wasting time and money throwing parts at an ECM issue.



#9 pcontant

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Posted 06 January 2019 - 11:37 AM

I beleive the Fault Code may be P2299, not sure if this is what you are asking by validation code. If you have a Multi-Function display you can read the code if it is set.

Multifunction Analog/Digital Display Only
To read any active fault code, press and hold MODE (M) Button and simultaneously depress the HI/LOW beam switch repeatedly several times.
If two or more codes are registered, use SET (S) or MODE (M) to scroll. To exit the fault codes mode, press and hold MODE (M) button.

The dealer may want to change the brake switch and this may solve your issue.

The lowest cost solution if your brake lights work and have the problems as I descirbed it is just to cut the wire. I’ve done it on a few sleds with this issue and it fixed the problem.

Good luck and let us know how this gets resolved.

Thanks.

#10 Bkstraub

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Posted 19 January 2020 - 11:01 PM

I have a 2015 summit 800. It looks like you are working with the top connector on the ECM. Pin 27 on mine with the white wire is on the bottom plug. Can you confirm this is the correct wire? I’ll have my multimeter with me tomorrow.. also, will this cause the motor to retard timing or pull fuel? Yesterday was the first time I saw the message. It was on and off the whole ride, and at high RPM the engine would bog.

#11 pcontant

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Posted 20 January 2020 - 07:32 PM

I have a 2015 summit 800. It looks like you are working with the top connector on the ECM. Pin 27 on mine with the white wire is on the bottom plug. Can you confirm this is the correct wire? I’ll have my multimeter with me tomorrow.. also, will this cause the motor to retard timing or pull fuel? Yesterday was the first time I saw the message. It was on and off the whole ride, and at high RPM the engine would bog.


It’s should be the bigger plug SH If I recall. WMS is the smaller one.

#12 Bkstraub

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Posted 20 January 2020 - 11:31 PM

I got it figured out. On the 800 it’s J1B pin 25 not J1A. Snipped and stowed. No more error message. Tore apart the pump canister and found the jet pump clogged up. Sticking a new pump in while I have it apart. Cheap insurance for $60. Hopefully this cures all my issues. Still trying to find the correct fuel blend for my 872.

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Edited by Bkstraub, 20 January 2020 - 11:32 PM.


#13 Daag44

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Posted 26 January 2020 - 10:57 AM

Once the wire is cut you can measure the voltage on both snipped ends to confirm where the 5V is being fed. It's not worth doing with the wires covered in shrink tube, but anyone else that experiences this problem could do this.


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#14 Nathan78

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Posted 11 February 2021 - 07:48 PM

Has anyone encountered any adverse effects at all after cutting? I love my sled and want it for a few more years but can’t stand driving a slot machine

#15 00PowderSpecial

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Posted 15 March 2021 - 07:13 PM

Can anyone confirm if the all white wire is the one that needs to be cut? I’m on a 14 backcountry x 800. I can’t find any markings for pin 30, but read in a previous response that it was the white wire in the lower connector.

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