ECM - SV650.org

DJ123 · 10-08-11, 03:24 PM

Is there a test you can perform to show if the ECM is not operating as it should or is completely buggered

10-08-11, 03:46 PM

Generally not, what bike and what symptoms. Most of the time if the ecu is buggered the bike wont go.

DJ123 · 10-08-11, 03:49 PM

SV650 K3. It now won't bring the starter motor in or pressurise the fuel pump on ignition switch on. I have checked every wire, connection and safety switch and all is working well. Also checked the relays and they too are also good. Every part seems to work fine individually, leading me to think the ECU is now the culprit.
Is there a test of power or continuity i can do across the ecu to see if power is getting there, or being sent out?

10-08-11, 04:06 PM

Have you checked/replaced the main fuse (worth changing as not always obvious its gone) and checked the fuse holder connections?.

10-08-11, 04:09 PM

also have you removed the pc3 you have for sale and has this issue occured since you removed it?.

DJ123 · 10-08-11, 04:12 PM

yeah i have checked all fuses and connections. All fuses look good and have power going to them. Nope, pc3 is still on the bike and wired in.
I don;t know if this is relevant r not, when turning off the ignition a few dashes of led take a slight delay in clearing off the screen. could this be a sign of anything?

DJ123 · 10-08-11, 04:13 PM

could the rectifier/regulator be causing this issue?

10-08-11, 07:52 PM

Do u know someone with an SV that you can do a quick swap and see it the symptoms follow the ECM?

muzikill · 10-08-11, 09:12 PM

have you checked the fuel pump actually is getting power and not just checked it at the fuel pump connector fly lead. could it be shorted? im sure there is a way to check the pump is working by bypassing the ecm and disconnecting the fuel line and allowing fuel to run into a measuring jug by powering the pump direct from the battery.

DJ123 · 10-08-11, 09:31 PM

it's all sorted out now, thankfully the ecm wasn't at fault, neither was any other part.
it now runs and makes a glorious noise! fingers crossed for MOT time tomorrow.
Thanks for your help guys!

10-08-11, 03:24 PM	#1
DJ123 Member Mega Poster Join Date: Jul 2011 Location: Somewhere over there Posts: 3,245	ECM Is there a test you can perform to show if the ECM is not operating as it should or is completely buggered

10-08-11, 03:46 PM	#2
SV650Racer Guest Posts: n/a	Re: ECM Generally not, what bike and what symptoms. Most of the time if the ecu is buggered the bike wont go.

10-08-11, 03:49 PM	#3
DJ123 Member Mega Poster Join Date: Jul 2011 Location: Somewhere over there Posts: 3,245	Re: ECM SV650 K3. It now won't bring the starter motor in or pressurise the fuel pump on ignition switch on. I have checked every wire, connection and safety switch and all is working well. Also checked the relays and they too are also good. Every part seems to work fine individually, leading me to think the ECU is now the culprit. Is there a test of power or continuity i can do across the ecu to see if power is getting there, or being sent out?

10-08-11, 04:06 PM	#4
SV650Racer Guest Posts: n/a	Re: ECM Have you checked/replaced the main fuse (worth changing as not always obvious its gone) and checked the fuse holder connections?.

10-08-11, 04:09 PM	#5
SV650Racer Guest Posts: n/a	Re: ECM also have you removed the pc3 you have for sale and has this issue occured since you removed it?.

10-08-11, 04:12 PM	#6
DJ123 Member Mega Poster Join Date: Jul 2011 Location: Somewhere over there Posts: 3,245	Re: ECM yeah i have checked all fuses and connections. All fuses look good and have power going to them. Nope, pc3 is still on the bike and wired in. I don;t know if this is relevant r not, when turning off the ignition a few dashes of led take a slight delay in clearing off the screen. could this be a sign of anything?

10-08-11, 04:13 PM	#7
DJ123 Member Mega Poster Join Date: Jul 2011 Location: Somewhere over there Posts: 3,245	Re: ECM could the rectifier/regulator be causing this issue?

10-08-11, 07:52 PM	#8
hardhat_harry Guest Posts: n/a	Re: ECM Do u know someone with an SV that you can do a quick swap and see it the symptoms follow the ECM?

10-08-11, 09:12 PM	#9
muzikill Member Mega Poster Join Date: Jul 2005 Location: Dunfermline Posts: 1,712	Re: ECM have you checked the fuel pump actually is getting power and not just checked it at the fuel pump connector fly lead. could it be shorted? im sure there is a way to check the pump is working by bypassing the ecm and disconnecting the fuel line and allowing fuel to run into a measuring jug by powering the pump direct from the battery. __________________ Learn to maintain your bike, take it apart, rebuild the engine & more (using better bolts ), drop it & fix it again! K3 Job c.v: Engine:remove/split/rebuild/refit. Replace:Gearbox,Fuel pump,Gaskets. Piston clean,rings. Overhaul:Throttle body,Injectors,Brakes,Forks. Remove/refit:Exhaust,Radiator,Oil cooler,Throttle,Air filter,Tank. Replace: Oil,Coolant,grease,brake hoses & bleed.

10-08-11, 09:31 PM	#10
DJ123 Member Mega Poster Join Date: Jul 2011 Location: Somewhere over there Posts: 3,245	Re: ECM it's all sorted out now, thankfully the ecm wasn't at fault, neither was any other part. it now runs and makes a glorious noise! fingers crossed for MOT time tomorrow. Thanks for your help guys!