This was a job I won t soon forget. I was unable to get the speed sensor out. Up about a quarter of a inch a best. So I just replaced the head of the full sensor unit. This is the piece that contains the circuit. Same results, bad speed readings. Had a buddy with one of the diagnosis units which indicated the sensor was reporting correctly. Actually had to drive with the diagnostic unit on my lap. I tried a different cluster unit with similar problems. Road Test, I think your assessment is correct, there must be wiring issues between the cluster and the sensor since the sensor must be giving the correct reading for the diagnostics to report the correct speed.
Not sure how to handle the wiring bit.
For those of you looking for where the speed sensor is on the 93 corolla, it is on top of the trans behind engine. Almost a perfect 12 o clock position if you are standing in front of the car. You can only see it working for the right side of the hood.
Saturday, January 6th, 2007 AT 11:50 PM