Clutch sensor problem

[warp9.9]

T2046018 looks like it comes attach to the switch harness. About 108 USD which compared to the whole assembly it is less then half the price.

 

[Stillserving]

I don't think having a working switch is any different then having the wires joined with a good proper solder joint or a good splice. The ECU looks for a ground on that wire (happens when you pull the lever in and activate the switch). That tells the ECU the clutch is in, go ahead and allow the start sequence to begin. No ground on that wire, the dumb knucklehead rider is trying to start w/out pulling the clutch in-don't do it. There should be no difference between grounding that wire by joining the two together and/or pulling in on the lever.

My keyless ignition sequence starts when I pull in the clutch to ground that wire and get the chain reaction started. Once I get needle sweeps, I hit the starter and she's alive. Sometimes I give the clutch a quick pull and let it out while putting on my gloves and sometimes I'm already on the seat so I pull it in and wait till I can hit the button. Therefore sometimes the computer sees initial power up with the clutch out and sometimes with the clutch in. NO difference from my perspective. No matter which way it's done, the ECU needs to see that ground whenever you want to activate the starter. I know there are a few members here who have bypassed that switch, just can't remember who off the top of my head.

You want to leave it off, leave it off. Just make sure you have a good solid electrical connection. Get that tackled and then move to the next step of the fuel gauge - if it's still broke.

 

[TURBO200R4]

very true the clutch switch just informs the ecu
however there was one person that made the claim that keeping that clutch switch circuit closed all the time cause problems with running because ecu always recognized that the clutch was pulled in.
i do not know if this is a fact or not and i am to forgetful to by pass mine.

just a lame idea
if it were mine (i never use horn) i would use that horn button to replace the clutch switch.
just pull in clutch lever and press horn.

of coarse u can leave it like it is (if u have a good memory ) and just engage clutch when necessary.
and find out if it causes a running problem on your bike.

 

[Stillserving]

That I could see. The running issue with it appearing to be pulled in all the time. But it doesn't seem to effect it when sitting at a stop light or if you have it pulled in when sitting there talking to someone for a short time or other similar instance. The OP's issue appeared to deal with starting issues and fuel gauge though.
I don't know enough or have a logic tree to evaluate exactly what the ECU does when the clutch is in, but my bet would be that it's only a logic gate that tells the system it's OK to start - safety issue/switch. But who knows for sure - except the thousand pound heads that wrote the ECU software....

 

[warp9.9]

Ya for 60 bucks I found a used on on ebay. You could see the wire nut right where the switch used to be.

 

[ArekDeBoss]

I have ordered one and will try to implant it into existing wiring. We will see what happens

 

[Stillserving]

May have to rethink my previous statement if this is true. Looks like what you guys were talking about:

How to by pass/void clutch sensor

 

[TURBO200R4]

i make it two guys say dont bridge it with a couple saying that their bike ran okay.
50/50 chance
i carry a piece of striped wire in case mine fails.

 

[motolink]

I had a clutch switch problem a year ago, like someone else said, I could get the motor to start if I kept the start button pushed in and pulled the clutch in and out a few times. The fix I did was, pulled the switch off the perch, Pulled the rubber cover back as far as I could, soaked the switch in a mixture of vinegar and salt for 15 minutes, that removed any corrosion inside the switch, then soaked it in a mixture of bicarbonate of soda to neutralise the acid effect of the vinegar, smeared some electrical grease into the switch and reassembled. Been 100% ever since.

 

[Mr Mike]

very true the clutch switch just informs the ecu
however there was one person that made the claim that keeping that clutch switch circuit closed all the time cause problems with running because ecu always recognized that the clutch was pulled in.
i do not know if this is a fact or not and i am to forgetful to by pass mine.

just a lame idea
if it were mine (i never use horn) i would use that horn button to replace the clutch switch.
just pull in clutch lever and press horn.

of coarse u can leave it like it is (if u have a good memory ) and just engage clutch when necessary.
and find out if it causes a running problem on your bike.

I had this happen on my Busa. Had the clutch wires tied together, would run for 10 minutes, then go into limp mode.