SupaSupraSE
08-13-2005, 12:40 AM
Q- Alright, so what exactly is a "thrown speed sensor signal"?
A- A "thrown speed sensor signal" is a signal that sometimes can get thrown by removing your dash, messing with the ECU improperly, and working on the car with the battery on. You'll know if your speed sensor signal is thrown, by any or all of the following symptoms. 1) You SAFC/SAFC-2 will continually read 0% throttle, and won't read any throttle your giving it. 2) The car will idle irregularily, you will sometimes stall and spudder at stoplights. 3) Your car will have a "stumbling" feeling between shifts after given increased throttle.
This is a "trick" you can try that will only take a few minutes, that does NOT require any money, splicing wires, or hacking up the car.
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1) Leave your battery cables on, along with everything else. Turn your ignition so your electronics will display, but do not turn on your car.
2) Pull off the top part of your dash, and disconnect all of your guages. (Tach, Speedo, etc.) Disconnect them from their plastic clips, and pull out the top part of your dash so you can hold it in your hand.
3) Leave it removed for 1 minute. While its removed, turn your car completely off, and then turn it back on to where you had it before. (Only electronics, air, CD, etc will play)
4)Put your dash back in place, clip back on everything. Put everything back together so your car is in driving condition.
5) Once everythings put back, reset your ECU. Do this by pulling out the 30 watt fuse from the fuse box
6) It should work
If this doesn't fix it, redo the entire process, sometimes it takes a few tries.
This should fix your problem without having to actually go buy a thing or cut up any wires.
This process took me TWO tries before it worked. The first try was with the battery disconnected, and it didn't work. The second try was with the battery was in, and it worked.
I have an SAFC-2 on the % throttle display. When the speed sensor was thrown, it would read 0%, no matter what % the throttle was engaged. The second I got the speed sensor working, it would read exactly what % throttle I was pressing.
It also quit stumbling, stalling, and idling bad.
*This was tested on an OBD1 1995 MKIV 5 speed supra. I am not sure if it will work on your OBD2*
A- A "thrown speed sensor signal" is a signal that sometimes can get thrown by removing your dash, messing with the ECU improperly, and working on the car with the battery on. You'll know if your speed sensor signal is thrown, by any or all of the following symptoms. 1) You SAFC/SAFC-2 will continually read 0% throttle, and won't read any throttle your giving it. 2) The car will idle irregularily, you will sometimes stall and spudder at stoplights. 3) Your car will have a "stumbling" feeling between shifts after given increased throttle.
This is a "trick" you can try that will only take a few minutes, that does NOT require any money, splicing wires, or hacking up the car.
--------------------------------------------------------------------------
1) Leave your battery cables on, along with everything else. Turn your ignition so your electronics will display, but do not turn on your car.
2) Pull off the top part of your dash, and disconnect all of your guages. (Tach, Speedo, etc.) Disconnect them from their plastic clips, and pull out the top part of your dash so you can hold it in your hand.
3) Leave it removed for 1 minute. While its removed, turn your car completely off, and then turn it back on to where you had it before. (Only electronics, air, CD, etc will play)
4)Put your dash back in place, clip back on everything. Put everything back together so your car is in driving condition.
5) Once everythings put back, reset your ECU. Do this by pulling out the 30 watt fuse from the fuse box
6) It should work
If this doesn't fix it, redo the entire process, sometimes it takes a few tries.
This should fix your problem without having to actually go buy a thing or cut up any wires.
This process took me TWO tries before it worked. The first try was with the battery disconnected, and it didn't work. The second try was with the battery was in, and it worked.
I have an SAFC-2 on the % throttle display. When the speed sensor was thrown, it would read 0%, no matter what % the throttle was engaged. The second I got the speed sensor working, it would read exactly what % throttle I was pressing.
It also quit stumbling, stalling, and idling bad.
*This was tested on an OBD1 1995 MKIV 5 speed supra. I am not sure if it will work on your OBD2*