Crankshaft Position Sensor (POS)

Loosen the fixing bolt of the sensor.
Disconnect crankshaft position sensor (POS) harness connector. See Figure .
Remove the sensor.
Visually check the sensor for chipping.
Check resistance as shown in Fig 1 .

Fig 1: Checking 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.