2002 JEEP LIBERTY 3.7 v6

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Page 1413 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual OPERATION
2.4L
Engine speed and crankshaft position are provided
through the CKP (Crankshaft Position) sensor. The
sensor generates pulses that are the input sent to the
Powertrain Control Module (PCM

Page 1414 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual INSTALLATION
2.4L
(1) Clean out machined hole in engine block.
(2) Apply a small amount of engine oil to sensor
o-ring.(3) Install sensor into engine block with a slight
rocking action. Do not twist s

Page 1418 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual REMOVAL
2.4L
The Idle Air Control (IAC) motor is located on the
rear side of the throttle body (Fig. 12).
(1) Disconnect electrical connector from IAC motor.
(2) Remove two mounting bolts (screws).
(3

Page 1419 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual The resistance values of the IAT sensor is the same
as for the Engine Coolant Temperature (ECT) sensor.
REMOVAL
2.4L
The intake manifold air temperature (IAT) sensor
is installed into the intake manif

Page 1420 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual INSTALLATION
2.4L
The intake manifold air temperature (IAT) sensor
is installed into the intake manifold plenum at the
rear end of the intake manifold.
(1) Check condition of sensor o-ring.
(2) Clean

Page 1421 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual The range of voltage output from the sensor is usually
between 4.6 volts at sea level to as low as 0.3 volts at
26 in. of Hg. Barometric pressure is the pressure
exerted by the atmosphere upon an obje

Page 1422 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual INSTALLATION
2.4L
The Manifold Absolute Pressure (MAP) sensor is
mounted into the rear of the intake manifold. An
o-ring is used to seal the sensor to the intake mani-
fold (Fig. 19).
(1) Clean MAP se

Page 1423 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual ronment that they operate in, that keep them from
being interchangeable.
Maintaining correct sensor temperature at all
times allows the system to enter into closed loop
operation sooner. Also, it allo