Crankshaft Position Sensor
Faults in crankshaft position sensor circuit may set Code 11. To test system, see CODE 11 diagnostic procedures in TESTS W/CODES - 2.4L article.
Crankshaft position sensor is mounted on flywheel end of left cylinder head (Maxima VE30DE engine), or on front end of left cylinder head (300ZX). On all other vehicles, crankshaft position sensor is part of distributor.
- To test crankshaft position sensor, remove crankshaft position sensor (or distributor). Leave wiring harness connected. On vehicles with distributor, disconnect secondary coil wire from distributor cap, and then connect wire to ground. On all vehicles, turn ignition on.
- Connect logic probe or DVOM with an analog bar graph function to ground. While slowly rotating sensor shaft by hand, backprobe specified wire terminals of sensor connector. See CRANKSHAFT POSITION SENSOR VOLTAGE TEST table.
- If voltage does not fluctuate between 0 and 5 volts, check for damaged or dirty signal plate in crankshaft position sensor, and for shorted or open harness. If harness and signal plate are okay, replace crankshaft position sensor.
NOTE:
It is possible to measure crankshaft position sensor voltage with a conventional DVOM without bar graph function; however, it may be difficult to determine peak voltage signal due to averaging of signal.
CRANKSHAFT POSITION SENSOR VOLTAGE TEST (1)
| Application | Wire Color (1 Degree Signal) | Wire Color (120/180 Degree Signal) | ||||
|---|---|---|---|---|---|---|
| Altima | Yellow | Blue | ||||
| Maxima | Green/Yellow | Green/Black | ||||
| NX & Sentra | Yellow | Blue | ||||
| Pathfinder & Pickup | Green/Black | Green/Yellow | ||||
| Quest | Red/Blue | Red/White | ||||
| 240SX | (2) Black | White | ||||
| 300ZX | Green/Yellow | Green/Black | ||||
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