vocaldog
VocalDog
Ok. TPS and stepper motor adjustment complete. Coil leads checked. I'm getting a 'speed sensor circuit malfunction' error code from Tune ECU. Any ideas where to go from here? The bike won't start!
Speed Sensor Curcuit Malfunction
- Thread starter vocaldog
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- speed sensor circuit
R3Tex
Living Legend
No mate...you're f#cked 
On a more serious note...have you tried clearing the code?
On a more serious note...have you tried clearing the code?
vocaldog
VocalDog
I also have the tach and speedo disconnected to dry out. Could that be causing it not to start for some strange reason?
yup. Several times.No mate...you're f#cked
On a more serious note...have you tried clearing the code?
vocaldog
VocalDog
Also took sensor out to make sure it was clean. Anybody know where the sensor connects on the other end so that I can check the connection?
Idaho Red Rocket 3
Living Legend
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- 2006 RIII Standard Bagger w/Fairing
What do you mean by "dry out" ? Having the clocks disconnected could have something to do with it.
vocaldog
VocalDog
I noticed a lot of moisture inside the speedo and tach, so I disconnected and blew out with compressed air, now letting them dry fully.
R3Tex
Living Legend
I would bet that having part of the electrical system disconnected would be an issue
DEcosse
If it's no Scottish it's CRAP!
You do not need the clocks connected (on a classic*) in order for it to start.
However that is indeed source of the 'speed sensor' error message you are getting - the power to the speed sensor actually originates from the gauge.
So now gauge connected means no power to the sensor means error detected by the ECU.
But that error will not prohibit anything regards to its ability to run
*different story on a CANBUS model i.e. Roadster or Touring.
So ignore the speed sensor error for now - it will be resolved when you reconnect working speedo gauge
And has nothing to do with ability to start or run.
When you say 'won't start' - what do you mean exactly?
Won't crank or won't fire?
If it is cranking over but won't fire, you need to look to whatever you might have done with your TPS & Stepper cal.
And also look to your hoses to the MAP sensor to be sure nothing leaking there.
However that is indeed source of the 'speed sensor' error message you are getting - the power to the speed sensor actually originates from the gauge.
So now gauge connected means no power to the sensor means error detected by the ECU.
But that error will not prohibit anything regards to its ability to run
*different story on a CANBUS model i.e. Roadster or Touring.
So ignore the speed sensor error for now - it will be resolved when you reconnect working speedo gauge
And has nothing to do with ability to start or run.
When you say 'won't start' - what do you mean exactly?
Won't crank or won't fire?
If it is cranking over but won't fire, you need to look to whatever you might have done with your TPS & Stepper cal.
And also look to your hoses to the MAP sensor to be sure nothing leaking there.
Last edited:
vocaldog
VocalDog
It cranks but won't fire. I checked the hoses and even cleaned the MAP sensor. It wouldn't start even before my TPS and stepper adjustments. The stepper control arm was kind of jammed and wouldn't return fully closed. I lubed it, set the gap to .5mm, and correctly adjusted the TPS and stepper voltages. Should I do a TPS or ISCV reset after all that?
