RAM 2500 Truck 2WD L6-5.9L DSL Turbo VIN 6 (1998)
Camshaft Position Sensor: Description and Operation
CAMSHAFT POSITION SENSOR (CMP)-ECM INPUT
Camshaft Position Sensor (CMP)
The Camshaft Position Sensor (CMP) contains a hall effect device called a sync signal generator to generate a sync signal.
The sync signal generator detects a machined hole on the rear face of the camshaft drive gear. The signal is used to verify the position of the #1
cylinder during engine operation.
When the leading edge of the machined hole enters the tip of the CMP the interruption of magnetic field causes the voltage to switch high resulting
in a signal of approximately 5 volts.
When the trailing edge of the machined hole leaves the tip of the CMP the change of the magnetic field causes the voltage to switch low to 0 volts.
Camshaft Position Sensor (CMP) Location
The CMP is located below the fuel injection pump. It is attached to the back of the timing gear cover housing.
The CMP is not used for any control of fuel system. It is used only for diagnostic purposes.
