Won't run 2001 RC51 - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 14 (permalink) Old 11-12-2008, 09:04 PM Thread Starter
 
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Won't run 2001 RC51

So I have a 2001 RC51 that won't run. Ordered a new ecu from a salvage yard. Tested the coils. Kick stand switch, oil pressure switch, neutral switch, etc.. all good. I can't get spark. Maybe a crank trigger, or the computer I have just got is bad too?
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post #2 of 14 (permalink) Old 11-13-2008, 02:47 PM
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2 bad computers? No way

When you flip the kill switch to on is your fuel pump priming?

Check your fuel cutoff and bank angle relays in the back. There will be one on each side of the bike strapped to the subframe underneith the seat cowl.
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post #3 of 14 (permalink) Old 11-13-2008, 03:40 PM Thread Starter
 
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I will check. The fuel tank pump was replaced when I got it. I gess this bike has been through 3 owners who got sick of trying to figure it out. I just want to fix it and have fn at the track!
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post #4 of 14 (permalink) Old 11-13-2008, 06:47 PM Thread Starter
 
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Ok I hooked up the fuel tank, and switched the 2 relays. Fuel pump primed. I switched them back and it still worked fine. I have 0 voltage going to the coils. I need spark. Wish I had a schematic.
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post #5 of 14 (permalink) Old 11-13-2008, 09:16 PM
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Do you have a service manual? I think it tells you how to test that stuff.

If not let me know and I can email it to you.
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post #6 of 14 (permalink) Old 11-13-2008, 09:24 PM Thread Starter
 
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No and yes please!!!!!!!!! lol
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post #7 of 14 (permalink) Old 11-13-2008, 09:36 PM
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let me think about it ???
just jerkin with ya

pm me your email address and I'll send it right over
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post #8 of 14 (permalink) Old 11-17-2008, 06:50 PM Thread Starter
 
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Ok well I got tired of waiting, and got the book. Jumped the plug to get the trouble shoot codes. 2,3,4,5,8,9..... The throttle positioning sensor, and TI are the 2 codes that are the major ones. Followed the book down to the harness computer factory trouble shooting harness needs. Everything checks out fine to the ECU. So I tried to follow the trigger wires off the cam and the crank. Not getting any signal from the ECO. Not getting signal to the coils. Swapped out ECU, and Converter unit. Still nothing. So any guesses? I tried bypassing the neutral safety, clutch switch, kick stand switch, nothing! The Angle relays are all good, and working. I get no ignition!!! GRRRRRR The fuel pump is priming.
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post #9 of 14 (permalink) Old 11-18-2008, 12:05 AM
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just a quickie but have you checked the start stop switch n make sure when in the run pos> it switches the ecu power to 12v? look in your wiring diagram and find the hot wire going to the ecu that comes of the run stop switch n check it with a meter ti make sure that in fact it does power the ecu when turned to run also do the same with the ignition switch< if you got no fire you need to follow the path of electricity from its source to designation, keep this in mind and it will help to not over complicate things. by this i mean the power starts at the battery make sure you hav correct voltage if good, then where does the voltage go to next? is it there? if so where does it go to next? and so on till you find where it doesnt go. yes there are shirt cuts but if not familiar with this type of work and i mean on a daily basis then this is the best way to go about it.
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post #10 of 14 (permalink) Old 11-18-2008, 11:10 AM
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