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CAMSHAFT POSITION (CMP) SENSOR CONSTRUCTION/OPERATION [L8, LF, L3]

id0140a5105000
• 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.

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1 | CMP sensor
2 | Camshaft
3 | Rotation
4 | Main relay
5 | CMP output signal