Camshaft Position Sensor (3.1L VIN M)

On 3.1L (VIN M), sensor is a Hall Effect sensor, located on the front top of the engine. See component "G" in Figure . As the camshaft sprocket turns, a magnet in it activates a Hall Effect switch in camshaft sensor. This signal is generated whenever cylinder No. 1 is at TDC of its compression stroke. This signal is used by PCM, in conjunction with the 3X and 24X crankshaft position sensors signals, to trigger the fuel injectors in sequential firing order. If sensor should fail while engine is running, engine will continue to run using the last calculated camshaft sensor signal to maintain sequential fuel injection mode. Upon restart, engine will run with a one in 6 chance of being correct. Vehicle will run, but it may run rough.