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No spark c24,c25 turns over connectors good

330 Views 13 Replies 4 Participants Last post by  Fixnride
Hi, new to site and could use some guidance on troubleshooting no spark issue - both coils. Engine turns over, have power to coils (but no signal to fire coils from ecu). Checked and cleaned harness connections and all look good. In dealer mode it shows codes 24 and 25. Also show FI light after cranking. Fuel pump cycles fine. Fuses not blown. Do not have crank position error, but was planning to pull magneto cover to check wiring. Only other thought was bad ECU. Wanted to check if there’s more I can check…
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May be a good idea to put a 'hello' in the new members section rather than a request for help as a first post.
I did a quick Google search and found C24 indicates low voltage on front coil, looking for C25 found a few mentions of issues on Green connector. I'd be checking here first.
There’s no obligation to reply if you don’t have any technical guidance, but sorry for missing the hello. Wish you well…
There’s no obligation to reply if you don’t have any technical guidance, but sorry for missing the hello. Wish you well…
In addition to advising you on polite forum etiquette I also conveyed what I had found about the message you are receiving, just trying to be helpful with both of these. I’ll be more careful in future. Good luck with your issue.
There’s no obligation to reply if you don’t have any technical guidance, but sorry for missing the hello. Wish you well…
You did get a reply to your enquiry.
True! I should have mentioned that I had already looked up the codes. The harness connectors were checked and cleaned. Thankfully the green one was fine. Also read all of the coil related posts on this forum which were helpful and narrowed the search. Was hoping to run into a fellow SV’er that had lived the same situation and could give experience-based guidance. I’ll pull the magneto cover tonight and will post anything I find that may help someone with this issue. I think it’s either the CPS/CKS which is part of the magneto or it’s the ECU. Could be a magnet came off and broke a signal wire, but we’ll see…
Wiring and magneto are fine under cover. Sensor tested working at 192ohms. Have continuity to first connector and connector is fine. Will continue to trace from connector to ECU tomorrow… Will later check voltage while cranking. If it has voltage, it would seem to be the ECU unless someone has insight otherwise. Had a similar situation with another bike, but it was the fuel pump instead of coils and culprit turned out to be the starter relay. And yes, I replaced the ECU while trying to figure it out and don’t want to unnecessarily buy a bunch of parts… Looking forward to reviving and riding this twin!
Make sure the rotor gets the standard fix first.....
I haven’t heard of a rotor fix. Will search the site. Thanks
Ok, the magnets are all firmly attached. That was checked last night. I put it back together. Did hear they could come loose and thought that could have disconnected crank sensor. Looks like no one has had this same issue. More to follow. May be unusual enough that the fix may not be helpful to others…
Я бы начал с простого - реле в блоке предохранителей и датчик падения.
Ok, the magnets are all firmly attached. That was checked last night. I put it back together. Did hear they could come loose and thought that could have disconnected crank sensor. Looks like no one has had this same issue. More to follow. May be unusual enough that the fix may not be helpful to others…
A word of warning, those magnets will let go at some point, and its expensive if it goes real ugly. Get some JB Weld and do the fix.
Agreed, I’ll get the magnets JB’ed! Will get back to the wire chasing and testing afterward…
Never mind, I got this!
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