Camshaft Position (Cmp) Sensor Function [Lf]; Camshaft Position (Cmp) Sensor Construction/Operation [Lf] - Mazda 2006 MX-5 Service Highlights

CAMSHAFT POSITION (CMP) SENSOR FUNCTION [LF]

• Detects the rotation angle of the intake-side camshaft.
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CAMSHAFT POSITION (CMP) SENSOR CONSTRUCTION/OPERATION [LF]

• Installed on the engine head cover.
• Six pulses per one camshaft rotation are detected by a wide projection and a narrow projection installed on the
intake air side camshaft.
• The camshaft 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 camshaft cause a change in the magnetic flux when they pass near the magnetic sensor
of the CMP sensor by the rotation of the camshaft. The CMP sensor converts the change in magnetic flux to a
digital waveform (rectangular waves) by the processing circuit. The PCM detects the engine speed and
camshaft position based on the camshaft position waveforms.
CMP SENSOR
°
60
ROTATION
°
30
°
60
°
30
CMP SENSOR
OUTPUT SIGNAL
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01–40–44
CONTROL SYSTEM
CAMSHAFT
°
90
90˚ 90˚
30˚
CMP SENSOR
CMP
SENSOR
OUTPUT
SIGNAL
90˚
30˚
E5U014018230N01
E5U014018230N02
PCM
CPU
90˚
E5U140ZT5660