P500 ECU replacement

[Neohio]

So is there a chance my Ecm is good and the wiring after is causing the short?

Correct. Something would have made the ECM go bad.
Can you post a pic of the ECM? you might be able to see the PCB for a bad spot.

 

[Admin]

 

[Chooglin]

Yepper. That's the little bugger. Chooglin you do good work. I don't care what trigger says about you. LMAO

Is he talking about me again?

 

[rtn001]

So is there a chance my Ecm is good and the wiring after is causing the short?

If I remember my electrical trouble shooting 101 it just could be. I would do everything I could to make sure before I spent the $$$ for a new one. I had good luck with eday and Amazon parts for my Kawasaki. I would attempt to get a Honda part if it is to be had.

 

[rtn001]

Is he talking about me again?

Just could be. You know how he is. LMAO

 

[Gambled22]

Correct. Something would have made the ECM go bad.
Can you post a pic of the ECM? you might be able to see the PCB for a bad spot.

 

[Neohio]

View attachment 118758 View attachment 118759 View attachment 118760

bummer, pretty sealed unit

 

[Gambled22]

If water got into one of those connectors could that of caused it to just turn off while riding, and blow the fuse???

 

[rtn001]

If water got into one of those connectors could that of caused it to just turn off while riding, and blow the fuse???

If water completed the circuit between the power lead and a groung yes it could blow the fuse. If you got water in a connector dry it with a heat gun or a hair dryer. Put dielectric grease on the connector. Plug it in and see if it blows. If you haven't done it yet you need to put dielectric grease in all the connectors. You can get it at any parts store. I get mine at Walmart in the automotive section where the head light bulbs are. They call it bulb grease. Just wondering. Have you checked to see if you are throwing any trouble codes? I don't know how it works but there is a thread on here about it.

 

[906UP]

It's highly unlikely to be the ECU, my guess is you've got a short in something that is energized by the ECU....fuel pump relay, ignition circuit, etc. The sealed units used in powersport applications rarely fail...it can happen but as others said, check everything else first.

 

[DG Rider]

What year is this 500?

 

[Gambled22]

What year is this 500?

It's a 2015 , I checked all wires and I don't see anything, but leaning towards the water got in and blew it, just ordered a new ECU, wasn't to bad, so will see what happens when it gets herw

 

[oldfortyfive]

Don’t overdue the dielectric grease. It’ll hydraulically push the connector pins out of the housing.

 

[Eltobgi]

So I have been working on my 2015 P5 over the past week and removed interior plastics and floor and unplugged my PGM-FI (ECU) and set it aside on the work bench. Completed wiring to support dual battery and turned my dual battery switch from Off to On to restore power to electrical. Tried to turn the key to check power and...nothing. Mounted the fuse block up front so checked for power and I had AUX power. Then checked stock battery where I extended power and ground and I had power. Hmmmmm

Sat there contemplating what I could have done wrong and then realized I did not have the (ECU) connected. So I grabbed it from the bench and carefully plugged it in and the turned the battery switch again from Off to On and then tried turning the ignition switch again and this time...

Power...Glorious Power

So I told this story after reading the last few posts about disconnecting it and the P5 still wanting to start.

Assuming they can’t start with a disconnected PGM-FI (ECU) as mine could not. I think this would indicate a short somewhere. What do you guys think

 

[Gambled22]

Hey everyone and sorry about the delay, i just got the ecm i ordered, plugged it in and everything works now, i am definitely going to make those connectors stay dry from now on and hit them with the grease. Just want to say thanks for all the help narrowing this down.. cant wait to have it out riding again in

 

[Chooglin]

Hey everyone and sorry about the delay, i just got the ecm i ordered, plugged it in and everything works now, i am definitely going to make those connectors stay dry from now on and hit them with the grease. Just want to say thanks for all the help narrowing this down.. cant wait to have it out riding again in

Great news , glad to hear she's running again!