Ok, here is the deal. I have a obd 0 car converted to obd 1.
Several months ago, I blew the differential in my tranny. This damaged my tranny casing.
And prevents me from using my vehicle speed sensor, since the hole where the vss sits, is no longer straight. It was no big deal, since I had the VSS turned off with a obd 0 chip.
However hondata tells me that I have to have VSS working to use S200 obd 1 hondata.
Does one know how to create a fake VSS signal? Or know how to bypass it.
Thanks in advance.

 

im in this same predicament. My brother and i demolished a stock OBD0 cluster to try and find out how the VSS outputs signal. the speedo cable turns a little wheel that has a magnet inside it and once the magnet spins past a small pickup, it outputs a pulse. Now, i havent actually made the simulator yet, but i assume that its a simple Hz value based on the MPH the car is traveling. Im sure you could make a small circuit with an IC that would output 2 different values (stopped and moving) via a switch on the clutch pedal or the like. This is for using ECU controlled launch control which uses VSS signal.

I dont know if this will help you, but i shall keep all of you updated when i find out the specific values etc.

 

I thought the same thing. But I dont think a constant value will work. My understanding is that
the VSS is a load sensor. And the ecu is looking for changing values. I have an electrical VSS from a obd 1 car, and was thinking of spining it with a small electric motor and feeding that signal
to the ECU. If a constant value is ok. then what your saying will work also. Good luck.
Anyone with any other ideas would be appreciated.

 

Hmm... Did you read that write-up I did on bypassing a knock sensor? Seems like that may work here. Do a search for "knock sensor bypass".


Following my lead - the piezo transducers would create higher voltage as your RPMs rise, which would also be as your actual speed rises. And maybe you could wire the transducers into your brake pedal switch so they would cut out when you hit the brakes. That way, the ECU would think "okay, his foot's on the brakes and there is no VSS signal, so he must be at a stop and his RPMs are at idle". And that would be true, except the ECU will think you are at a complete stop while you are still actually decelerating.