What process did you go through to figure out you needed a new part?
I have a 2006 650 Commando and 4wd is not engaging. I pushed the button on the dash. That is the extent of my checking out what the problem is so far.
I realized the 4wd wasn't working when I went to move the machine and got stuck in a little bit of snow and the front wheels were not moving.
I am still re-habing the machine and this would be the next on the list.
Thanks for any info.
Thanks for your replies guys. I might have fixed it. I changed the idle air control valve. That seems to have fixed it although I have only gotten to test it briefly as the temp here is cold. I had forgotten that these fuel injected ones have an idle air control valve. The old one seemed to be stuck as to not feed any air while trying to start the engine.
Thanks again and will update thread if appears to not be fixed upon further testing.
I think that Dave's on the right track here. I'd definitely test that particular sensor. And also verify the actual temperature. The thermostat is activated by heat. So if its working, the motor should be heating up.