jwilliamson0927

So I have looked through many post and can't seem to find exactly what is going on.. So my 93 4runners speedometer and odometer don't work. I have replaced both speed sensors. It is an automatic transmission. Does anybody have an idea as to where I should go next.

rustypigeon

Do you have an electronic or cable driven speedometer? I am not sure what year they switched over but the test procedure is going to be different depending on which one you have.

jwilliamson0927

I have an electronic speedometer. Both speed sensors on the transmission have been replaced.

rustypigeon

Here is how to test the electronic speed sensor, make sure it is sending out a signal before you do anything else...
-Unplug the VSS#2. This is the one with 3 wires going to it (black/orange, green/blue, green/red).
-Hook up the sensor as shown below. Make sure not to short the positive jumper wire to ground or you will melt a wire. I use fused jumper wires when doing these types of tests.
-Raise the rear wheels and put on jackstands. Rotate the driveshaft.
-The multimeter should switch from 0 volts to battery voltage 4 times for every revolution of the drive shaft.

Edit for clarity... Pin 1 of the VSS is the one that would normally have the black/orange wire connected to it when the harness is connected. This is the VSS pin that will receive + battery voltage.