Impreza L Sport Wagon F4-2.2L SOHC (1999)
Camshaft Position Sensor: Description and Operation
Except California
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The camshaft position sensor is located on the left-hand camshaft support to detect the combustion cylinder at any one moment.
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It is designed so that the ECM accurately reads the number of pulses which occur when protrusions provided on the back of the left hand
camshaft-drive sprocket cross the sensor Internal construction and the basic operating principle of the camshaft position sensor are similar to those
of the crankshaft position sensor. A total of seven protrusions (one each at two locations, two at one location and three at one location) are
arranged in four equal parts of the sprocket, as shown.
