Camshaft Position Sensor Location for Wrangler L6-40L VIN S (2000)
The Camshaft Position Sensor (CMP) on the 4.0L, 6 - cylinder engine is bolted to the top of the oil pump drive shaft assembly. The sensor and drive
shaft assembly is located on the right side of the engine near the oil filter.
The CMP sensor contains a hall effect device called a sync signal generator to generate a fuel sync signal. This sync signal generator detects a rotating
pulse ring (shutter) on the oil pump drive shaft. The pulse ring rotates 180 degrees through the sync signal generator. Its signal is used in conjunction
with the crankshaft position sensor to differentiate between fuel injection and spark events. It is also used to synchronize the fuel injectors with their
respective cylinders.
When the leading edge of the pulse ring (shutter) enters the sync signal generator, the following occurs: The interruption of magnetic field causes the
voltage to switch high resulting in a sync signal of approximately 5 volts.
When the trailing edge of the pulse ring (shutter) leaves the sync signal generator, the following occurs: The change of the magnetic field causes the sync
signal voltage to switch low to 0 volts.
