nauti1
Veteran
Look at the sticky note at the top of the first page and click on fuses and relays. It tells you how to run a diagnosis on your system. Follow the directions and go to code 51, the ECU will activate your cooling fan for you with out running the engine. This is a easy check to see if everything is working, ie fan motor, relay, ect. You would get a code if you temp sending unit was faulty as I beileve the ECU reads this to activate the fan.
09nytro
TY 4 Stroke God
Thanks Grimm I will shop around alittle to see what I can findGrimm said:
Well, I had the light come on this weekend and I'm somewhat concerned. It came on the first time after my buddies and I did several long drag races. We were on a hard packed lake with some crust on top...I assumed I had just beat on it a bit to much with out really letting cool down.
The next day we trail rode and hit a section of road that was 7km with zero to little good snow for cooling...the light came on so I pulled over and shut her down for a couple of mintues...started it up, no light so I dorve on...came back on just as I hit good trail and went out shortly after...kept riding an no issues. we made a couple 10 minute stops and then one more tht was about 20 min..no light. We crossed a lake that had little snow cover ( 3 miles ) and jumped back onto a trail that had soft packing snow...light came on but I kept on riding to see if it would coll down in the trail...it came on and off 2 more times. I stopped for gas and then let it cool down for 15-20 min and decided to head back as I was only 35 mies from the cottage....I went through verying condidtions on the trail, railbed and road side...teh light came on and off 5 more times, so when I foound a good field I got into some deep snow and goooed it to get the snow up front...then let it sit for 30 min with the top cowl off..I also held a chunk of packed snow to the front het exchanger. I drove home and the light never came on again ( 20 miles with 90 good snow for cooling) I've checked the fan fuse and it was fine...but I never checked if the fan actually was coming on...didn't think of it at the time...so I may replace the relay...but would driving it with the light coming on and off hurt anything? I took it out the next day and it seemd to run and sound fine. I checked for leaks and everything is dry. I did notice the the coolant resevoir has fluxuated...it was between the full and add lines when we first rode, after racing and the light came on the tank was full...it then fluxuated a tad the next day but never boiled over...any thoughts?
The next day we trail rode and hit a section of road that was 7km with zero to little good snow for cooling...the light came on so I pulled over and shut her down for a couple of mintues...started it up, no light so I dorve on...came back on just as I hit good trail and went out shortly after...kept riding an no issues. we made a couple 10 minute stops and then one more tht was about 20 min..no light. We crossed a lake that had little snow cover ( 3 miles ) and jumped back onto a trail that had soft packing snow...light came on but I kept on riding to see if it would coll down in the trail...it came on and off 2 more times. I stopped for gas and then let it cool down for 15-20 min and decided to head back as I was only 35 mies from the cottage....I went through verying condidtions on the trail, railbed and road side...teh light came on and off 5 more times, so when I foound a good field I got into some deep snow and goooed it to get the snow up front...then let it sit for 30 min with the top cowl off..I also held a chunk of packed snow to the front het exchanger. I drove home and the light never came on again ( 20 miles with 90 good snow for cooling) I've checked the fan fuse and it was fine...but I never checked if the fan actually was coming on...didn't think of it at the time...so I may replace the relay...but would driving it with the light coming on and off hurt anything? I took it out the next day and it seemd to run and sound fine. I checked for leaks and everything is dry. I did notice the the coolant resevoir has fluxuated...it was between the full and add lines when we first rode, after racing and the light came on the tank was full...it then fluxuated a tad the next day but never boiled over...any thoughts?
I had almost an identical experience this weekend. Lake runs, rough roads with no snow, etc. Light went off at identical times as yours. I wonder if this is a future issue, or is it somehow fixable.
Grimm
TY 4 Stroke God
As long as you're not riding with the temp light on for too long, say a minute, I'd say you didn't cause damage.
I think that you just hit prime conditions for overheating...warm temps with bulletproof trails and little loose snow for cooling. Scratchers should help. I plan on doing this for days like these, which seem to be happening far too often lately.
I think that you just hit prime conditions for overheating...warm temps with bulletproof trails and little loose snow for cooling. Scratchers should help. I plan on doing this for days like these, which seem to be happening far too often lately.
Grimm said:
I rode for more than a minute...but the light would go out so I kept riding...would the sled not go into limp mode if it over heated? I drove for 10-15 miles with the light constantly coming on and going off...it never boiled over at all and seemed to be fine once I got it completely cooled down. I even rode it the next day for a short blast...pinned it across a lake for a mile at WOT, ran fine.
Grimm
TY 4 Stroke God
If the light would go out, then great, keep riding.
I just wouldn't push it.
I just wouldn't push it.
I took a closer look this morning and it looks as though coolant has come out the over flow tube...just a few drops and I'm sure it was from the first time the light came on and the overflow tank was full...but the system did take it back in, so it was running pretty hot but now for very long... caue I basically shut it down when I saw the light. I don't think I have hurt the motor as it ran fine the next day...at least until the light started coming on again...but that was 50 miles into the ride.
09nytro
TY 4 Stroke God
The relay may be bad and fan may not be coming on if the fuse is good
xtxcited
Newbie
I'm thinking this is a problem and am thinking the best remedy is another heat exchanger under the tunnel. In Feb of this year, I was riding the day after 10" of powder fell and it was 30-40 degrees F. a little warm, but I was still very dissapointed. Before this ride, I had installed a Digital temp gauge and 3 vents in the hood. one vent in the nose in front of the radiator and 1 4" diameter vent on each side of the fuel tank above and behing the radiator.
light would come on at 210 several times running in and out of the wet powder ditch, and had to cruise on the edge of the road about 50mph to get the temp to come down. at one point, I pulled the hood off and I couldn't get it to overheat.
I called yamaha customer support and the guy on the other end of the phone had not even rode a snowmobile before...very dissapointed. He also said I was the first report of a Nytro overheating...other than this issue, I love the sled. Just can't believe I have to plug in $300 bucks to keep it from overheating on a day with plenty of snow!
I'm not even sure the MTX exchanger will be enough some days...it's a liquid cooled 4-stroke, it's should stay cool!
light would come on at 210 several times running in and out of the wet powder ditch, and had to cruise on the edge of the road about 50mph to get the temp to come down. at one point, I pulled the hood off and I couldn't get it to overheat.
I called yamaha customer support and the guy on the other end of the phone had not even rode a snowmobile before...very dissapointed. He also said I was the first report of a Nytro overheating...other than this issue, I love the sled. Just can't believe I have to plug in $300 bucks to keep it from overheating on a day with plenty of snow!
I'm not even sure the MTX exchanger will be enough some days...it's a liquid cooled 4-stroke, it's should stay cool!
jb_008
Extreme
- Joined
- May 21, 2012
- Messages
- 50
- Location
- Sault Ste. Marie, On
- Country
- Canada
- Snowmobile
- Yamaha Nytro RTX SE 09
I actually just picked up the heat exchanger myself because of overheating last year, don't want the same problem. I ended up picking mine up for $240+tax. Usually I pick up my parts at the dealer on the US side, but the quote I got was nearly $100 more than buying it in Canada at the closest dealer. Just have to install it now and wait for snow to try it out.
SRXSRULE2
Expert
I'm thinking if you want a easy way to test the fan just jump the relay. Do this often when working on cars to make sure the fan(s) are working. Best thing to do is get a fused wire (doesn't have to be heavy guage 14-16 is fine with whatever size fuse the fan uses) remove the relay, find the 2 pins for the switch side (usually a diagram with numbers on the relay) and jump the 2 pins. Fan should run with the key on.
I can go check my nytro later to tell you exactly which pins if anyone wants to know.
I can go check my nytro later to tell you exactly which pins if anyone wants to know.
1975FA
Expert
My 08 way using coolant and it turned out to be the waterpump shaft seal. There is a weep hole in the pump if the seal leaks. I used a presure testor and let it set whith the presure on. It was easy to see the leak.
Dano
TY 4 Stroke Master
A big factor causing the nytro overheat light to come on is ice build up on front exchanger. Whenever I ride in -20 or colder temps, I often have ice build up on front exchanger thus not letting fresh snow hit exchanger. The 2 exchanger protectors hold on to the ice so the heat doesn't easily melt off the block of ice. There is also a gap between ice and exchanger not allowing the ice to cool exchanger. When the ice falls off, the temp light goes off because engine cools again only to heat up again when new block of ice is formed. I only found this issue when smooth trail riding in cold temps.
Dan
Dan
