1994 Toyota Corolla 4 cyl Front Wheel Drive Manual 175000 miles
I have checked the voltage going to the speed sensor and it is reading voltage. I have checked the speed sensor by the Haynes manual and it is reading like the manual states. I have purchased a used instrument cluster and is still not working correctly. While the ignition is in the on position the speed needle bounces back and forth 60 to 20 or bounces all over the place. It has done this when the speed sensor is unplugged too. When I crank it the speedometer reads anywhere from 20 to 80 and as soon as I drive forward or backward it goes to 0 and as I increase speed it increases very fast. When I am running 60 it shows 70 to 85mph. Is it the ECM, bad speed sensor(even though it checks good), or instrument cluster? Thank you.
Monday, September 29th, 2008 AT 10:34 AM