P0717 Input/Turbine Speed Sensor Circuit No Signal

[CTScott]

Originally Posted by canadian deacon

I had a problem like that with a dodge caravan. I put the van up on jackstands, started it and put it in drive. I read the voltage off the sensor with a voltmeter. Checked for the voltage at the ecm and had it there. Turned out to be a bad ground rather than the sensor.

On the Yaris the Turbine sensor is a hall effect sensor with both ends being connected directly to the ECM, so this particular issue would not be a ground issue on the Yaris, but it could be corrosion of the connector terminals that plug into the sensor.