Speedo is going nuts... (Check Engine Light!), (Updated!) Options

[[Freemantle]]

Topic sums it up pretty well. My speedo jumps sporadically and eventually dies at zero, bouncing up sporadically. Whenever I had problems with this before it was always electricity problems screwing up the voltage readings from the Hall effect sensors. No dice, I tested it thourougly; my electrical system is running strong.

My next stop is the vehicle speed sensor. On my CRX it's right over the transmission housing, but I can't seem to find it on this 7A-FE. Is Toyota hiding it or am I just looking right past it?


Edit I threw a solid CEL today! I the car was slow to start, and then after about 10 minutes of driving i threw a solid CEL (but no limp mode). Where do I jump to pull the CEL and is there a directory of CEL definitions anywhere around?

This post has been edited by [Freemantle]: Jan 16, 2006 - 2:49 PM

[1900WattCelica]

I have this exact problem on my 93 Geo Prizm (4A-FE). I threw a code 42 which is the VSS code. I changed the VSS on the tranny and the ECU and the behavior remains the same. Lagos, you say it may be the guage cluster eh? Suprised an output would throw a CEL.