Crankshaft Position Sensor (Pos)

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

Loosen the fixing bolt of the sensor.
Disconnect crankshaft position sensor (POS) harness connector.
Remove the sensor.
Visually check the sensor for chipping.

Fig 1: Identifying Crankshaft Position Sensor
Courtesy of NISSAN MOTOR CO., U.S.A.
Check resistance as shown in Fig 2.

TERMINALS RESISTANCE SPECIFICATION

Terminal No. (Polarity)	Resistance Ω [at 25°C (77°F)]
1 (+) - 2 (-)	Except 0 or ∞
1 (+) - 3 (-)
2 (+) - 3 (-)

Fig 2: Checking Resistance Between Crankshaft Position Sensor Terminals

Courtesy of NISSAN MOTOR CO., U.S.A.