Massimo MSU 500 not starting/no spark

[Kierobi]

New to owning a UTV and got myself a project one as my first one. 

Changed out the clutch and clutch housing etc. as the UTV was having problems going up hills and getting up to speed but now in the process of putting it all back together it won't start. Also changed fan gears for shifter

Here's what I've found so far (apologies for the bullet points);

• Motor will crank over and makes good turnover speed. 
• If I use spark plug tester or ground to engine, no spark. 
• At the connector to the ignition coil I get consistent 12v on the white wire and nothing at the black. Read in one of the posts that the 12v to the white wire should be intermittent when trying to get a spark at the plug?
• Tested ignition coil using a multimeter on resistance setting. Between two pins I get 0.46 ohms or thereabouts. Between either pin and spark plug boot I get somewhere around 16k ohms. Not really found a good video on testing these coils but think those are good readings. 
• Checked fuses in fuse box and are all good. 
• Fuel pump cycles on when I turn key to on position. 
• I disconnected the ignition coil to remove the clutch etc. to get it out the way but don't think I've damaged anything in the process. 

Can anyone point me in the direction of what to try next? Been trying to use the manual but considering the test procedure for the ignition coil is for the wrong type of coil, it's not been too helpful. I've read on another post about checking the ECM the two pins with 12v etc so will take a look at that next but any ideas that could get this machine started again are welcome!

[Kierobi]

So managed to get out to the UTV after work today and after struggling with the connections for a few minutes was able to test the inputs to the ECM. Everyone who said to read the fine print, you're not wrong!

Tested 12v constant at pin 18 and 12v at pin 15 when ignition switch turned on. When the ignition switch is turned off the 12v disappears. 

Is this looking as though the ECM is faulty or is there more than I can test with the ECM to make sure it's giving the correct outputs. Been reading through the threads in this forum trying to find an answer but there is a lot of information to go through!

[Kenh]

I had the same problem with my 2017 Massimo MSU500 side by side.

I replaced the ecu it controls everything 

[Connie White]

What is code 201 or 505 on my Massimo 500 UTV? 

CONNIE

[Don W]

Like Kent said, replace the ECU..

[Kierobi]

Should have posted an update but got it running a few weeks ago. 

Replaced the ignition coil and HT lead, cleaned all connections out with electroclean and tightened a few connections and she fired right up. 

Now it's on to all the other issues I have with this third hand machine

[Don W]

Awesome. I use electronics cleaner on all sorts of electrical equipment, its great.