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Home >> Subaru >> 2004 >> Legacy F4-2.5L SOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Camshaft Position Sensor >> Description and Operation
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Camshaft Position Sensor: Description and Operation

CAMSHAFT POSITION SENSOR

- The camshaft position sensor is located on the left-hand camshaft support. This sensor detects the combustion cylinder at any given moment.




- The sensor generates a pulse when one of the bosses on the back of the left-hand camshaft drive sprocket passes in front of the sensor. The ECM determines the camshaft angular position by counting the number of pulses.
Internal construction and the basic operating principle of the camshaft position sensor are similar to those of the crankshaft position sensor. Two bosses are arranged on the sprocket as shown.