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Diagnostic Test

CHECK CRANKSHAFT POSITION SENSOR (POS)-I
1. Turn ignition switch OFF.
2. Loosen the fixing bolt of the sensor.
3. Disconnect crankshaft position sensor (POS) harness connector.
4. Remove the sensor.
5. Visually check the sensor for chipping.
  
  Fig 1: Identifying Crankshaft Position Sensor
  Courtesy of NISSAN NORTH AMERICA, INC.
Is the inspection result normal?

YES

GO TO STEP 2 .

NO

Replace crankshaft position sensor (POS). Refer to REMOVAL AND INSTALLATION .

CHECK CRANKSHAFT POSITION SENSOR (POS)-II

Check resistance between crankshaft position sensor (POS) terminals as follows.

Terminals (Polarity)	Resistance (Ω)
1 (+) - 2 (-)	Except 0 or ∞ [at 25°C (77°F)]
1 (+) - 3 (-)
2 (+) - 3 (-)

Is the inspection result normal?

YES

INSPECTION END

NO

Replace crankshaft position sensor (POS). Refer to REMOVAL AND INSTALLATION .