Crankshaft Position Sensor (Pos)

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. 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: Inspecting Crankshaft Position Sensor Visually
Courtesy of NISSAN NORTH AMERICA, INC.
Check resistance as shown in the figure.

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

Fig 2: Checking Resistance Between CKP Terminals 1, 2 And 3

Courtesy of NISSAN NORTH AMERICA, INC.