Output Speed Sensor

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

The output speed sensor is installed to back side of transaxle.
The output speed sensor detects final gear speed.
The output speed sensor generates the ON-OFF pulse (short waveform) in proportion to the rotating body speed which is "The higher the rotating body speed is, the faster the change cycle is". The TCM judges the rotating speed from the changing cycle of this pulse signal.

Courtesy of NISSAN NORTH AMERICA, INC.