Mazda 2006 MX-5 - Crankshaft Position (Ckp) Sensor Construction;Operation [Lf]; Crankshaft Position (Ckp) Sensor Function [Lf]

CONTROL SYSTEM
01–40–43
01–40
CRANKSHAFT POSITION (CKP) SENSOR FUNCTION [LF]
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• Detects the pulse wheel rotation pulse as the engine crank angle signal.
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CRANKSHAFT POSITION (CKP) SENSOR CONSTRUCTION/OPERATION [LF]
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• The CKP sensor is installed on the engine front cover.
• The crankshaft position sensor pulse wheel has 30 projections with 10 ° of crank angle between the rising edge
of each projection.
• The crankshaft position sensor consists of a Hall element with a magnetic sensor, and a processing circuit that
performs signal amplification and identification.
• The projections on the plate installed to the crankshaft pulley cause a change in the magnetic flux when they
pass near the magnetic sensor of the CKP sensor by the rotation of the crankshaft. The CKP sensor converts
the change in magnetic flux to a digital waveform (rectangular waves) by the processing circuit. The PCM
detects the engine speed and crankshaft position based on the crankshaft position waveforms.
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CPU
PCM
360˚
16 TOOTH 13 TOOTH
10˚
30˚
30˚
CKP OUTPUT
SIGNAL
CKP SENSOR
CKP
SENSOR
OUTPUT
SIGNAL
CKP SENSOR
PAINT MARK AT
5TH TOOTH
CENTER LINE OF
CKP SENSOR
EMPTY SPACE
PULSE WHEEL
ROTATION
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