Tech Tip Corner
WA933A & WA933B Crank Angle Sensors
Nissan hard start, no start
Nissan hard start, no start, improper fuel control, pinging, no power and
surging can be caused by a faulty CRANK ANGLE SENSOR, this is a
common problem with these vehicles.
The problems seen can be intermittent and even heat related failures.
Sometimes the vehicle will display a failure code 11 , but many times there
won't be any code.
An intermittent crank angle sensor can be verified using an oscilloscope,
logic probe or fast updating frequency counter - duty cycle meter.
If testing indicates the crank angle sensor is at fault replacement sensors
are now available, the need for a complete distributor replacement is no
longer required.
The sensor connector is labeled with A,B,C,D on its end face.
A: Is Key on Reference Voltage.
B: Is 180/120 Degree Signal Pulse.
C: Is 1 Degree Signal Pulse.
D: Is Ground.
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