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Reverse - RER - Failure new 2021 EXP SE

reverse RER Ski-doo Expedition SE cold

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#1 A_laskan

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Posted 05 November 2020 - 02:48 AM

Is there a certain temperature required (for the machine/engine to warm up to) before reverse works? I was out riding and went to reverse and no go. This was the first time I have ever used the reverse on this new machine, a 2021 Expedition SE 900 ACE. After I pressed the button to go into reverse, I just heard some clunking sounds then a RER Failure message came up on the display.

 

I tried a few more times, same thing. I tried in neutral, 1st, and 2nd. Same thing. You can see engine temp (I think?) in attached photo with the RER failure message. It was minus 15 F (15 degrees F below zero, or about minus 26 C) outside at the time. No snow or ice build up at all on the track. The machine was on fairly level, hard pack snow ground (snow covered dirt road). I had ridden the machine about .9 miles before trying reverse. The display readout showed 169F for engine temp.

 

I drove back home and tried it again and then reverse worked without issue, several times. Weird. I didn't happen to notice or get a photo of the display when the reverse did work, so didn't notice the engine temp readout at that point.

 

Thoughts? Anyone else experience this? What could cause this?

 

RER Error message - minus 15 - 20201104 sml.jpg


Edited by A_laskan, 05 November 2020 - 04:09 AM.

2006 Ski-Doo Skandic WT 550 SUV

2019 Ski-Doo Skandic WT 600 ACE

2021 Ski-Doo Exp SE 900 ACE


#2 Minnesota FreeRide

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Posted 05 November 2020 - 03:07 AM

Can't be "temp" or you would never get them out of the trailers without front doors. (If they built that, well, leave it at that. . .)

 

When reverse did not work, do you recall if you "slammed on the brake" and slid the track locked tight to a stop then attempted reverse? Even if that was not the case perhaps and attempt to slightly move forward would have helped? (I know, not the best thing when you need to go backwards!!!!)

 

Good luck!!!!


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Ride Right.

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#3 A_laskan

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Posted 05 November 2020 - 03:14 AM

Can't be "temp" or you would never get them out of the trailers without front doors. (If they built that, well, leave it at that. . .)

 

When reverse did not work, do you recall if you "slammed on the brake" and slid the track locked tight to a stop then attempted reverse? Even if that was not the case perhaps and attempt to slightly move forward would have helped? (I know, not the best thing when you need to go backwards!!!!)

 

Good luck!!!!

Ahh... yeah shouldn't be temperature related then... I didn't think about cold sleds in (or on) a trailer and needing to back out. I sure hope it's not a temperature deal! Having to drag a heavy sled backwards to offload all the time or having to let the thing sit there running to warm up a lot before reverse works would suck.

I am riding real easy, during break in period for the first 30 miles or so. So, no, didn't "slam on the brake." I did move forward some and retry reverse a few times though and same issue (RER Fail).

Thanks for the well wishes. Not what I wanted to experience with a brand new sled. Hopefully, it was just a quirk but it has me wondering big time what the heck!


Edited by A_laskan, 05 November 2020 - 04:00 AM.

2006 Ski-Doo Skandic WT 550 SUV

2019 Ski-Doo Skandic WT 600 ACE

2021 Ski-Doo Exp SE 900 ACE


#4 Minnesota FreeRide

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Posted 05 November 2020 - 03:50 AM

"Always something".

 

Old sleds like mine have "issues", then again like in your case brand new has you wondering. . . 

 

Nothing is perfect, over time the answer will come but for now enjoy!!!!


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#5 Judge64

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Posted 05 November 2020 - 05:29 AM

I'm not as familiar with the G4 900 reverse as I am with the XS 900 reverse system but I will offer up a couple thoughts.....

 

At those ambient temps, it is very possible that you had a relay fail. The relays aren't completely foolproof. If there is a little moisture inside the relay, it might be frozen / stuck in its current position and did not move when voltage was applied to it when you tried to engage reverse. There are two relays. One for forward and one for reverse. I carry spare relays with me when I am riding my Enduro.

 

If it happens again, try swapping the relays with each other. The sled then may go into reverse but not back into forward if it is a bad relay.

 

Shortly after I got my spring ordered '16 Enduro 900, I was backing out of the trailer on a very cold morning and it stayed stuck in reverse. I swapped the relays and it went back into forward (but then would not go into reverse). Once I replaced the relays, I didn't have the issue again.

 

There is also a Reverse Position Switch and a Forward Position Switch. There could be an issue with that switch or the reverse linkage could be out of adjustment preventing the switches from working properly.

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  • Screen Shot 2020-11-05 at 5.26.27 AM.png


#6 maddog223

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Posted 05 November 2020 - 07:36 AM

That is very unfortunate and disappointing on a new sled. This has happened to me also, it’s a bad relay. $20 at an automotive store.


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#7 MX-Z Man

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Posted 05 November 2020 - 07:41 AM

Sometimes, especially with a new belt, if the deflection is set a little too snug they won't shift.

Maybe try opening it up a little and see if it helps, or just the miles you've run may have already been enough.

The XP was the most fun sled ever made - but I liked my XR more. The 850 takes it to a whole different level. But darn, the 900T is Bad to The Bone! 

No Need to Freeze-buy a set of these! http://www.coldguards.com/


#8 chiaj144

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Posted 05 November 2020 - 07:59 AM

Could just be the deflection. Open the side panel and pull the secondary backwards a little bit then hit the reverse. If it goes in your deflection is too tight.

#9 1Evil55

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Posted 05 November 2020 - 10:08 AM

Reverse issues always seem to come up this time of year.  I have nothing to add other than a reverse failure, sorry OP.  Hope you get it worked out!

mJVsgqC.gif



#10 Minnesota FreeRide

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Posted 05 November 2020 - 12:14 PM

I roll on the floor every time I see that video!!! ( Folks, do not doo that, someone could get hurt!!!)

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#11 captain marvel

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Posted 15 December 2020 - 03:45 PM

If you have electric reverse, the belt adjustment could be the problem. See manual for the proper setting of the belt. Adjust the belt so that the top of the secondary sheave is at the bottom of the belt valley. This reverse problem is a constant headache. Bad relays, frosted relays, belt adjustment, reverse arm adjustment. Shutting down an engine on a very cold morning can cause the relay to frost up. Never shut down the engine until the first pee stop. If you have a frosted relay, you can remove it and warm it up in your hands. 



#12 gadejethro

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Posted 16 December 2020 - 08:47 AM

Could also need the mechanical linkage adjusted. Could be a lot of stuff, but your dealer should make it right.



#13 puddjpr

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Posted 16 December 2020 - 09:46 AM

Being that you heard some "clunking" I'm thinking your relays are probably fine. Possibly getting hung up mechanically.

#14 crk133

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Posted 16 December 2020 - 05:51 PM

I had it happen on my enduro last year once. thankfully it's only happened once. no idea what caused it it wasn't overly cold I had about a hundred miles on it for the day of course it happened at a very inopportune time but it hasn't happened again.

#15 bikeandsled

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Posted 16 December 2020 - 07:15 PM

My 1200 would frequently fail to shift when cold then work fine warmed up.,,, but its getting it out of the trailer is when you need it.  Relays all activating and a clunk sound but error message comes up.  I found opening the cowling and just moving the secondary a little would put in in gear.  This should not be going on with a new sled. End of story.





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