Cobalt L4-2.0L SC VIN P (2005)
Camshaft Position Sensor: Description and Operation
CAMSHAFT POSITION (CMP) SENSOR
The camshaft position (CMP) sensor is triggered by a notched reluctor wheel built onto the exhaust camshaft sprocket. The CMP sensor provides four
signal pulses every camshaft revolution. Each notch, or feature of the reluctor wheel is of a different size which is used to identify the compression stroke
of each cylinder and to enable sequential fuel injection. The CMP sensor is connected to the PCM by the following circuits:
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A 5-volt circuit
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A low reference circuit
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A signal circuit
