Component Description

When the shift lever position is Neutral, park/neutral position (PNP) switch is ON. (M/T models)

When the shift lever position is P or N, transmission range switch is ON. (CVT models)

ECM detects the position because the continuity of the line (the ON signal) exists.

Fig 1: Identifying Transmission Range Switch And PNP Switch

Courtesy of NISSAN NORTH AMERICA, INC.