Interesting and you are probably 99.99% correct. Who wants to be the 1st to verify Andy's conclusions? 
I've been verifying it for years.Interesting and you are probably 99.99% correct. Who wants to be the 1st to verify Andy's conclusions?![]()
wrong.There was some discussion about whether or not permanently shorting the clutch switch would affect the way the bike runs. There was some discussion about whether or not the ECM can tell if the clutch switch is closed all the time. Short story, no, the ECM can't "see" the clutch switch.
I took a look at the circuits for first generation and 2003 SVs (those are the schematics I have). The clutch is a simple interrupt between the starter button and the relay. There is a hot supply that comes from the run/stop switch that provides power to the start button, power to both coils, and connects to a pole on the ECM. But there is no signal available from the clutch switch to the ECM.
Looking at it another way, the circuit is the same electrically when the clutch is engaged and/or when the starter button is not depressed: open circuit. To complete the circuit the clutch has to be disengaged AND the starter button has to be pushed.
Ok, so why does the ECU listen to this and where can I cut the wire to the ECU so it doesn't know I've shorted the switch... and ... will the bike be hard to start cold or something if I do so?wrong.
first generation clutch switch is simply in line on power wire from starter button to starter relay.
second generation clutch switch is not in line with power or anything else. it is ground for relay with tail of it going to ECU. when you pull clutch relay and ECU gets grounded.
first generation rev limiter is cutting power.
second generation rev limiter is cutting fuel supply.
I believe reason ECM listen to this is to give more fuel for starting.Ok, so why does the ECU listen to this and where can I cut the wire to the ECU so it doesn't know I've shorted the switch... and ... will the bike be hard to start cold or something if I do so?
Alright, but isn't there a fuel mapping over these sensors anyways ? (a changed one I mean).I don't think it matters that you bypassed it, once motor starts running water sensor and air sensor and rest of system take over.
basic map is IAP, CKP and TPS. other sensors are compensation.Alright, but isn't there a fuel mapping over these sensors anyways ? (a changed one I mean).
Oh s**t, I'm starting to believe it again ... ;D
J
I thought you looked at 03 schematic??If you have a later model schematic send it to me and I can look at it.
+1. Six to be exact...I've been verifying it for years.
not guts if you know your sh!t.Wow man, you've got guts ... ;D
J
Clutch position switch on the SV1000 K5- shorts pin 48 on the ECUs second plug (the larger one) to ground.Short story, no, the ECM can't "see" the clutch switch.
If uses a different ignition map (and presumably fuel map) when the clutch is in, or the bike is in neutral. You'd have to check bozo's work for details though.Ok, so why does the ECU listen to this and where can I cut the wire to the ECU so it doesn't know I've shorted the switch... and ... will the bike be hard to start cold or something if I do so?