Left me stranded! 06 M7 ECU started smoking and melted?

[samsquatch47]

So this happened to me on saturday in the North Door. Was playing around in a meadow and noticed the tach flickered funny so I stopped and popped the hood. Then I noticed the ECU ,or computer whatever you call it, had smoke billowing out of it. Shut the machine off, pulled firewall cover off and checked all wiring from handlebars to the computer. Couldn't find any rubbed through or even any warm wires. Pulled off the ECU and it has a bunch of stuff melted on the bottom side. Sled ran for another 200ft and then would not re-start. I had to tow it out. Any one know what could cause this? Maybe an internal failure in the box? Also apon closer inspection the ECU had a small crack on the bottom side. Maybe moisture got in and fried it? The day before I had snow ingestion problems with my bdx intake. Just don't want this to happen again computers are not cheap!:d
Thanks

 

[glengine]

Just a little note for yah, If you were riding in the north dore i wonder if you were aware that you were riding in a cariboo closure area. Which means a person aren't supposed to be riding there. The ministry people are useing this season as an information year to get the info out, next year they will be patroling it and handing out tickets. I just wanted to make sure you were aware that it was closed. Buit on the other item i have never heard of a M7 comp melting. I would say that it was a comp issue itself.

 

[samsquatch47]

Just a little note for yah, If you were riding in the north dore i wonder if you were aware that you were riding in a cariboo closure area. Which means a person aren't supposed to be riding there. The ministry people are useing this season as an information year to get the info out, next year they will be patroling it and handing out tickets. I just wanted to make sure you were aware that it was closed. Buit on the other item i have never heard of a M7 comp melting. I would say that it was a comp issue itself.

Many appologies. Our group was guided in and I had no idea it was closed. Our guide said something about it being closed earlier for skiers, but said nothing about caiboo closures. I know this isn't a great excuse but i want to make it clear that I am not one of those guys who dosen't care about the riding areas. I should know by now to get the info my self and not trust others. Awwwwg! The damn guide should have known. Anyway back to figuring out why my computer fried. Any more ideas?

 

[steveo10]

id say its a internal failure in the box itself

unfortately the computer is a common problem. those cpu's arent cheap

 

[Polarblu]

It was actually a comon problem with people who rode without the stock hood on. Voltage spikes fried the ecu cause there wasnt enough draw.

 

[samsquatch47]

It was actually a comon problem with people who rode without the stock hood on. Voltage spikes fried the ecu cause there wasnt enough draw.

I have never ran without the hood but I guess I dont know what the last guy did? It was running very erratic the day before I bet it was starting to screw up then and I didn't know it.

 

[glengine]

If you have removed the headlights you can fry the comp if you dont install a resistor into the system. We have maps available at out shop or visit Fish and Wildlife - Environment - Province of British Columbia The area's for around mcride concerning the dore are #20 cariboo river closure,#19 mt halverson closure. Just thought this might help as they also give gps co-ordinates for pinpointing closure limits.

 

[samsquatch47]

If you have removed the headlights you can fry the comp if you dont install a resistor into the system. We have maps available at out shop or visit Fish and Wildlife - Environment - Province of British Columbia The area's for around mcride concerning the dore are #20 cariboo river closure,#19 mt halverson closure. Just thought this might help as they also give gps co-ordinates for pinpointing closure limits.

Thanks Glen. Headlights are in. Will make sure to stop buy and get a map on the next trip.
Dustin

 

[glengine]

Cool. Do you know if any of the original electronic have been removed? Because if not then i'm really leanin towards it just bein the comp malfunctionin.

 

[magnet32]

my m8 fried ecu last year , didn't put wire's back properly under feul tank . check under there ,just held with tape from factory. mine wore through on bulkhead .good luck.

 

[samsquatch47]

my m8 fried ecu last year , didn't put wire's back properly under feul tank . check under there ,just held with tape from factory. mine wore through on bulkhead .good luck.

Were these the wires for the tailight? I don't have a tailight at the moment so there is no wires there... Good lead though. That means that a wire shorting out could have caused this. I will keep on hunting. Don't want to install a new ecu and blow another. Wait... If I don't have a tail light drawing all the time would that be enough load off the system to cook the the ecu? Hmmmmmm

 

[magnet32]

my coils and revers wiring under there,check voltage regulator,might be fried to.mine was. your tail light shouldn't be a problem ,unless it grounds out.

 

[mike5945]

Were these the wires for the tailight? I don't have a tailight at the moment so there is no wires there... Good lead though. That means that a wire shorting out could have caused this. I will keep on hunting. Don't want to install a new ecu and blow another. Wait... If I don't have a tail light drawing all the time would that be enough load off the system to cook the the ecu? Hmmmmmm

It will be enough of a lack-of-load. I know of two being fried from a broken wire to the speed sensor.

 

[samsquatch47]

It will be enough of a lack-of-load. I know of two being fried from a broken wire to the speed sensor.

Haven't had a chance to check out the sled but if there is no shorted wires this is starting to make sense. I installed a new d-drive and when I went to pull out the old speed sensor it broke so there isn't one installed. So now I have no tail light and no speed sensor to pull load on the system.

 

[cobbycat]

we have experienced this a couple times, both times it was related to a faulty voltage regulator. replace it before you fry another like we did!!!

 

[samsquatch47]

Eureka! Found the power wire for the power valve servo motor was rubbed through and shorting to ground. This would cause the sled to erratically go into limp mode and fry the ecu. I am also replacing the voltage reg just to be safe. Inspected the entire harness and nothing else is wrong. Hope this fixed it. Now just need to find an ecu. Anybody got one?