Hey guys, I have a 18' z 1000 with a no crank situation.  Battery fuses and relays are all good. Dash lights up fine, it dies cycle the MIL light fast three times. Not a code but a quick flash. No fuel pump or spark even when jumping out the solenoid. I can get it to turn over by grounding the G/W wire from the ecu to the auxiliary start relay.
Any help would be great that's guys!

[2015 Z Force 800 53/Trail EPS]

Check the kill switch?

Yes seems to be working properly.

Did anyone ever find a fix for this problem. I have the exact same problem. No crank, fuel pump doesn't run, when the key is turned on the light blinks fast three times and hear relays click fast three times.

No crank could be caused by several things. Bad relays, bad connections. First test is to check the connections from the battery to the relay and relay to the starter. Tight?  Then jump the starter at the relay to get it to spin.

If it doesn't spin, then either there isn't enough juice in the battery, a cable is bad, or the starter has an issue.

If it spins,  jump the signal wire post on the relay to see if it will trip the relay and get the starter to spin.
If it doesn't spin, the relay is bad.

If it does spin, then there is an issue with the starter signal circuit. This could be caused by many things.

First make sure all the fuses are pulled and reseated. Test them while they are out, and check for weak connections when re-inserted.

After that, it could be  an interlock issue.  The simple check is the kill switch. Then I would check the ignition switch.

After that, check the Park/Neutral and Brake interlocks. It should always spin when the brake is depressed regardless of gear selection.

If all else fails, would need to test that the ECU is signaling the EFI and starter circuits.

When you turn the key on the MIL light blinks three times real fast. He fuel pump doesn't run. I can jump the starter solenoid and it will crank but no spark. When I hook up to the data link is won't communicate.

The data stream is specific to the ECU manufacturer. The dealer will have the correct device.

A worn ignition switch can do this. The contacts inside get dirty and burnt. Easy to replace, my 2018 had this issue.