Input Speed Sensor Circuit Check: Notes

The input sensor is of the magnetic induction type and is located on the left side of the transmission, forward of center. Serrations in the forward clutch housing induce a small A/C current as they pass by the input sensor. While there is no specific code for an input sensor problem, the PCM/TCM uses input sensor readings to calculate gear ratio, turbine speed, TCC slip, and determine if the engine is running.

NOTE: Test numbers refer to test numbers on diagnostic chart.

This test checks the input sensor circuit up to the PCM/TCM.
This test checks the sensor output.