Yep, I've checked BL/W, Y/BL from the transmission all through the kick panel and dash...

I've had no speed compensator or other devices installed, so I have no splices or breaks in my wiring.

Sleeper

 

OKay. . . so this gets wierd now! Is the S2000 VSS a hall sensor or a geared piece? I did diff, trans and engine oils last night. Today I drove to Seattle. Cruise and speedo worked FLAWLESSLY the whole way.

My only theory I have is that it's a hall-effect sensor in the trans, which leads me to think that there's metal floating in my trans that was flicking past the sensor, screwing it up. ALL i changed was the fluid, didn't touch any wiring, nothing. Trans works okay, but maybe it's time to find a new one if there's random crap floating in it?

Of course, if it's a gear-driven sensor, this theory all goes out the window, so i'd love to know.

 

The cruise control in the S2000 uses a cable. If there is too much slack in the cable, it could cause the speeds to go up or down. I would check the cable freeplay and adjust if nescessary. Hope this helps.

 

but now it's flawlessly working when all i did was change fluid. The cable's not really freeplaying, it pulls with plenty of force when the car's speed changes (to the computer anyhow.)

 

Its a hall-effect sensor.

 

I've had the same cruise control issue for over a year. I've replaced the VSS which did not fix the problem. I've also swapped the instrument cluster which also did not solve the problem.
A few observations from my specific issue:
- The speed read by the cruise control is fluctuating. Happens so fast that you usually won't see a change on the speedometer.
- I believe the cruise control is seeing these fluctuations and trying to compensate, hence the surges.
- After prolonged driving (1+ hours) my speedo sometimes bounces all over and sometimes drops to zero. I think this is the same issue but for some reason with time (or maybe heat), it gets more dramatic.
- This also affects the power steering as it thinks the car is now going zero mph and ups the power assist - this is an odd feeling when racing at the track and your steering gets extrememly light in a high speed corner.

I also have a yellow box speed compensator but I have un-wired it which did not fix the issue.

Regarding the hall effect sensor and transmission fluid change: I've changed tranny fluid several times with no resolution.
For those with this problem, what transmission fluid are you using?

 

It is a HES, huh? Craaap. That sucks.

I'm using Honda MTF both before and after the change.

 

[QUOTE=Tgr_Ree,Jun 4 2008, 06:39 PM]The cruise control in the S2000 uses a cable.