Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJEEP2002LIBERTY LIMITED EDITION 2WD V6-3.7L VIN KREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMCAMSHAFT POSITION SENSORDESCRIPTION AND OPERATION
2002 Jeep Liberty Limited Edition 2WD V6-3.7L VIN K
Camshaft Position Sensor: Description and Operation
2002 Jeep Liberty Limited Edition 2WD V6-3.7L VIN KSECTION Description and Operation
Fig.6 Camshaft Position Sensor - 3.7L:
The Camshaft Position Sensor (CMP) on this engine is bolted to the right-front side of the right cylinder head.
Fig.8 Camshaft Position Sensor Location - 3.7L:
The Camshaft Position Sensor (CMP) sensor contains a hall effect device referred to as a sync signal generator. A rotating target wheel (tonewheel) for the CMP is located at the front of the camshaft for the right cylinder head. This sync signal generator detects notches located on a tonewheel. As the tonewheel rotates, the notches pass through the sync signal generator. The signal from the CMP sensor is used in conjunction with the Crankshaft Position Sensor (CKP) 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 tonewheel notch enters the tip of the CMP, 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 tonewheel notch leaves then tip of the CMP the change of the magnetic field causes the sync signal voltage to switch low to 0 volts.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.