Crankshaft Position Sensor - Dodge Dakota Sport 2001 Service Manual

AN
ACCELERATOR PEDAL (Continued)
When installing the plastic retainer to the accelera-
tor pedal arm, note the index tab on the pedal arm
(Fig. 23). Align the index slot (Fig. 23) on the plastic
cable retainer to this index tab.
Fig. 23 Index Tab and Slot
1 - INDEX TAB
2 - INDEX SLOT
3 - CABLE RETAINER
4 - PEDAL ARM
CRANKSHAFT POSITION
SENSOR
DESCRIPTION - 2.5L
The Crankshaft Position (CKP) sensor is located
near the outer edge of the flywheel (or starter
ringear).
DESCRIPTION - 3.9L
The Crankshaft Position (CKP) sensor is located
near the outer edge of the flywheel (starter ringear).
DESCRIPTION - 5.2L/5.9L
The Crankshaft Position (CKP) sensor is located
near the outer edge of the flywheel (starter ringear).
DESCRIPTION - 4.7L
The Crankshaft Position Sensor (CKP) is mounted
into the right-rear side of the engine block (Fig. 24).
OPERATION - 2.5L
Engine speed and crankshaft position are provided
through the CKP sensor. The sensor generates pulses
that are the input sent to the Powertrain Control
Module (PCM). The PCM interprets the sensor input
to determine the crankshaft position. The PCM then
uses this position, along with other inputs, to deter-
mine injector sequence and ignition timing.
Fig. 24 CKP Sensor Location—4.7L V–8 Engine

1 - CRANKSHAFT POSITION SENSOR

2 - MOUNTING BOLT
The sensor is a hall effect device combined with an
internal magnet. It is also sensitive to steel within a
certain distance from it.
The flywheel/drive plate has groups of four notches
at its outer edge. On 2.5L 4-cylinder engines there
are two sets of notches (Fig. 25).
The notches cause a pulse to be generated when
they pass under the sensor. The pulses are the input
to the PCM. For each engine revolution there are two
groups of four pulses generated on 2.5L 4-cylinder
engines.
The trailing edge of the fourth notch, which causes
the pulse, is four degrees before top dead center
(TDC) of the corresponding piston.
The engine will not operate if the PCM does not
receive a CKP sensor input.
OPERATION - 3.9L
Engine speed and crankshaft position are provided
through the CKP sensor. The sensor generates pulses
that are the input sent to the Powertrain Control
Module (PCM). The PCM interprets the sensor input
to determine the crankshaft position. The PCM then
uses this position, along with other inputs, to deter-
mine injector sequence and ignition timing.
The sensor is a hall effect device combined with an
internal magnet. It is also sensitive to steel within a
certain distance from it.
The flywheel/drive plate has groups of notches at
its outer edge. On 3.9L V-6 engines, there are three
FUEL INJECTION 14 - 35