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CRANKSHAFT POSITION (CKP) SENSOR CONSTRUCTION/OPERATION [L3 Turbo]

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1 | CKP sensor
2 | Crankshaft pulley

• Installed on the side surface of the cylinder block (driver's side). Assembled at the twentieth pulse position (120 °) from the area where there is no single projection on the crankshaft position sensor pulse wheel.
• The crankshaft position sensor pulse wheel has 58 projections with 6 ° of crank angle between the rising edge of each projection.
• Consists of an IC with a giant magneto resistive (GMR) element and an integrated signal processing circuit, and a magnet. Signal reliability has been improved with the adoption of the GMR element resulting in the signal amplitude being wider compared to the hall element.
• Signal detection uses the special characteristics of GMR to change the electrical resistance corresponding to the magnetic field.
• The size of the magnetic field detected by the GMR element is changed into short waves at the signal processing circuit, and then input to the PCM as a sensor output signal.
• If the crankshaft position sensor is removed/installed or replaced, magnetized objects such as metal shavings adhering to the sensor could cause fluctuation in the magnetic flux of the magnetic pickup coil, causing abnormal sensor output which could adversely affect engine control.

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1 | Rotation
2 | CKP sensor
3 | Empty space
4 | Pulse wheel
5 | CKP output signal
6 | CKP sensor
7 | Main relay