4.7L V-8
The CMP sensor on the 4.7L engine contains a hall
effect device called a sync signal generator to gener-
ate a fuel sync signal. This sync signal generator
detects notches located on a tonewheel. The tone-
wheel (4) is located at the front of the camshaft for the
right cylinder head (2). As the tonewheel rotates, the
notches (1) pass through the sync signal generator.
The pattern of the notches (viewed counter-clockwise
from front of engine) is: 1 notch, 2 notches, 3 notches,
3 notches, 2 notches 1 notch, 3 notches and 1 notch.
The signal from the CMP sensor is used in conjunc-
tion 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.
REMOVAL
3.7L V-6
The Camshaft Position Sensor (CMP) on the 3.7L V-6
engine (3) is bolted to the front/top of the right cylinder
head (1).
1. Disconnect electrical connector at CMP sensor.
2. Remove sensor mounting bolt (2).
3. Carefully twist sensor from cylinder head.
4. Check condition of sensor o-ring.
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IGNITION SYSTEM - SERVICE INFORMATION
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