Speed Sensor

My S light is blincking on my 90 accord EX Coupe. I know this means the speed sensor is out or about ot go out. Where is the sensor located?? Is it an easy replacment or will it require torn knuckles na dmany cuss words??

I'm pretty sure you know how to pull your own codes, but just in case I'm just copy pasting an old post in it's entirity.

You want to make sure it is your VSS, as it could also be your TCU/TCM (tranny control unit/module).

To learn how to pull your own codes, go here and read everything:
http://www.hondapitstop.com/accord/technotes1/engine/error_codes/error_codes.html

If for some reason that isn’t sufficient for you, you may want to look at this:
http://www.automotiveforums.com/vbulletin/showthread.php?t=19102&highlight=P1259+VTEC+system+malfunction

Now you should have a code. Between these 4 pages you will DEFINANTLY find your code and what part of the car it refers to.


http://www.automotiveforums.com/vbulletin/showthread.php?t=19102&highlight=P1259+VTEC+system+malfunction

http://www.automotiveforums.com/vbulletin/showthread.php?t=369819&highlight=P1259+VTEC+system+malfunction

http://www.hondaswap.com/forums/index.php?showtopic=29806

http://www.hondata.com/techecucodes.html

VSS(vehicle speed sensor): Hopefully, you took the advice above and scanned the ECU for codes. If it is your VSS causing the problem, you will get a ‘17’ code. If you didn’t scan it for codes, you will notice problems with your tach, your speedometer, your cruise control, they will work intermittently if at all. If this is the case, check these out:
http://www.cybertrails.com/~bestinthewest/autotips/999VSSTestLocation.html
AND
http://www.hondapitstop.com/accord/technotes1/engine/speed_pulser/speed_pulser.html

If you buy a new speed sensor from the dealership, expect to pay WAY too much. Most people opt for a used one, either from another board member selling parts from their old Hondas (like I did), or going to a junkyard and getting it for $5-20. At a dealership, it could run well over $100. If you do some searching online, I found some remanufactured ones for ~$50 that came with some sort of warranty, but I’m sorry, I don’t recall the website.


TCU/TCM (tranny control module/unit): Similar symptoms as the VSS, yet this may cause shifting problems, you may lose 4th gear, and you wont have issues with cruise control/speedo/or tachometer. If you do a search for TCU or TCM, you can find quite a bit of info, but basically it is a little electronic box under the kickboard of the passenger seat (where the passenger's feet would be up near the dash) You pull back the carpet, and behind that metal shield there are 2 computer boxes...I forget which is the TCU (I want to say the one on the right, but double check that before you take my word on it). Anyway, the dealership will charge huge amounts of money for a new one. So go to your local junkyard or ask around on here. Typically you can find a used one for $50 or less. It takes 15 minutes for the average person to swap.





Basically, if you are sure it's the VSS and not the TCU. Just go here:
http://www.hondapitstop.com/accord/technotes1/engine/speed_pulser/speed_pulser2/speed_pulser2.html