Input Speed Sensor

The input speed sensor is installed to the front side of transaxle case.

Fig 1: Identifying Primary Speed Sensor
Courtesy of NISSAN NORTH AMERICA, INC.
The input speed sensor detects input shaft speed.
The input speed sensor generates an ON-OFF pulse signal according to the rotating body speed. TCM judges the rotating body speed from the pulse signal.

Fig 2: CVT Control System Operation Diagram (Primary Speed Sensor)
Courtesy of NISSAN NORTH AMERICA, INC.