I read on the internet that 92 accord VSS Sensor has three wires.
+12 V Yellow
Signal (normally at 5V) Orange
Ground Black

When the car moves signal becomes the 5v pulses ranging from Ground to 5V.

My question is that is there any difference in the VSS signal of 98 accord automatic transmission ? is it same and works on same mechanism ?

 

Check that voltage. I would imagine it to be the same as the Civic/integra ones of the same generations. They are 0-12V pulse, which makes more sense than the VSS having some sort of voltage divider within it (ie if it outputs a 5V pulse you would feed it 5V).

You should be able to get all of this form the service manual.

 

This page says what i am saying. http://techauto.awardspace.com/vss.html#Solutions Actually your point is legitimate