2001 speedometer and turn signal auto cancel

[Dpkal]

I have a 01 gl1800 and the speedometer quit working. The FI light informed me the VSS and all the fuel injectors were improperly functioning. Following the flow chart I found the ECM was bad because everything is functioning correctly. I replaced he ECM and nothing changed. The only other thing that I noticed the signal cancel is no operating. Any ideas I have checked all the fuses Please help

[WingAdmin]

Ah, ignore my previous post, just realized this is in the GL1800 section...teach me to answer these late at night.

OK, so a faulty VSS will cause both the speedometer and auto cancel to not work. Your DTC shows the VSS is faulty, so that jives. But it could be a bad VSS or bad connector or wire.

Curious that it's also showing a problem in ALL of your fuel injectors, which makes it more likely that there is not a problem with any of these things, and that the errors are in fact erroneous.

Looking at the ECM, the fuel injectors and the VSS are on separate connectors, so there's no commonality there.

Concentrating on the VSS, did you follow the steps in the service manual to the point where you're detecting a 5 volt pulse at the ECM?

[Dpkal]

yes, but the after more investigating, what are they considering a pulse? I have a background in electronic engineering and I would consider a pulse in the range of a full volt or the full 5v range. I pulled the VSS out and tested it to another piece of metal, I am not even getting 1/10th of a volt change, more or less I am getting a constant voltage of 5v DC. I figure the VSS is creating a square wave off the sprocket and the distance measured in time from the top of the waves determines the speed (I am purely guessing here). I figured that if the VSS is not giving off the correct "speed", the ECM would not be able to generate the correct signal to the fuel injectors causing an over or under fueling. I was able to clear out the fuel injector codes and they have not returned. the last time I rode I noticed over fuel consumption in the low range of -20mpg..

am I on the right track???

[WingAdmin]

yes, but the after more investigating, what are they considering a pulse? I have a background in electronic engineering and I would consider a pulse in the range of a full volt or the full 5v range. I pulled the VSS out and tested it to another piece of metal, I am not even getting 1/10th of a volt change, more or less I am getting a constant voltage of 5v DC. I figure the VSS is creating a square wave off the sprocket and the distance measured in time from the top of the waves determines the speed (I am purely guessing here). I figured that if the VSS is not giving off the correct "speed", the ECM would not be able to generate the correct signal to the fuel injectors causing an over or under fueling. I was able to clear out the fuel injector codes and they have not returned. the last time I rode I noticed over fuel consumption in the low range of -20mpg..

am I on the right track???

I don't know what the VSS component itself is, but if I were to make a guess, it would be the same as is used by Honda for ABS, pulse generators, crank position sensors etc: hall effect sensors. That means it is not going to put out voltage on its own, but will modulate voltage based on the presence of metal adjacent to the sensor.

You're no longer getting the fuel injector codes, but are you still getting the VSS code (11)?

[WingAdmin]

Also, did you put the ECM into test mode and test for the +5v pulse that way, on the test harness?

[Dpkal]

I followed the manual didn't have the nock out box they talked about but followed the directions for not having one. The voltage pulse I got from the VSS. Was 5vDC to 5.1vDC. You are saying something about test mode? Are you asking if I retrieved the fault codes with the jumper wire? Yes I used the jumper wire in the plug under the seat to retrieve the codes and to reset them to see what would pop back in there. Working on card I know the sometimes grab any code for any reason even when there is no problem

[WingAdmin]

I followed the manual didn't have the nock out box they talked about but followed the directions for not having one. The voltage pulse I got from the VSS. Was 5vDC to 5.1vDC. You are saying something about test mode? Are you asking if I retrieved the fault codes with the jumper wire? Yes I used the jumper wire in the plug under the seat to retrieve the codes and to reset them to see what would pop back in there. Working on card I know the sometimes grab any code for any reason even when there is no problem

That sure sounds to me like a failed VSS. You should be seeing from close to 0V to 5V.

[Dpkal]

I followed the manual didn't have the nock out box they talked about but followed the directions for not having one. The voltage pulse I got from the VSS. Was 5vDC to 5.1vDC. You are saying something about test mode? Are you asking if I retrieved the fault codes with the jumper wire? Yes I used the jumper wire in the plug under the seat to retrieve the codes and to reset them to see what would pop back in there. Working on card I know the sometimes grab any code for any reason even when there is no problem

That sure sounds to me like a failed VSS. You should be seeing from close to 0V to 5V.

Ok we are on the same page I will give updates when the parts come in

[WingAdmin]

Ok we are on the same page I will give updates when the parts come in

Make sure you replace the O-ring as well. See: viewtopic.php?f=7&t=29467#p169506

[Dpkal]

Speed sensor replaced and everything works great!!! Now to get it all back together haven't been on the bike in a few weeks time to ride!!

Thank you for all your help