Crankshaft Position Sensor (POS)

Loosen the fixing bolt of the sensor.
Disconnect crankshaft position sensor (POS) harness connector.
Remove the sensor.
Visually check the sensor for chipping.
Check resistance as shown in Fig 2.

Fig 1: Testing Crankshaft Position Sensor Resistance
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Identifying Crankshaft Position Sensor Terminal Specifications
Courtesy of NISSAN MOTOR CO., U.S.A.