2002 JEEP LIBERTY fuel pressure

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Page 222 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual CONDITION POSSIBLE CAUSES CORRECTION
5. Pressure cap not installed tightly.
If cap is loose, boiling point of
coolant will be lowered. Also refer
to the following Step 6.5. Tighten cap
6. Poor seals a

Page 305 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual ²RKE antenna (two circuits) - premium with
RKE only
²Tailgate ajar switch sense
²Tailgate cylinder lock switch sense
²Vehicle speed sensor
Refer to the appropriate wiring information for
additiona

Page 310 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual POWERTRAIN CONTROL
MODULE
DESCRIPTION
DESCRIPTION - PCM
The Powertrain Control Module (PCM) is located
in the engine compartment (Fig. 8). The PCM is
referred to as JTEC.
DESCRIPTION - MODES OF OPERAT

Page 311 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual ²The fuel pump is energized through the fuel
pump relay by the PCM. The fuel pump will operate
for approximately three seconds unless the engine is
operating or the starter motor is engaged.
²The O2

Page 312 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual ²Battery voltage
²Engine coolant temperature sensor
²Crankshaft position sensor
²Intake manifold air temperature sensor
²Manifold absolute pressure (MAP) sensor
²Throttle position sensor (TPS)

Page 313 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual ²Fuel injectors
²Ignition coil(s)
²Certain relays/solenoids
²Certain sensors
DESCRIPTION - SENSOR RETURN
The Sensor Return circuits are internal to the Pow-
ertrain Control Module (PCM).
Sensor Re

Page 314 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual ²Transmission convertor clutch circuit. Driven
through J1850 circuits.
OPERATION - 5 VOLT SUPPLIES
Primary 5±volt supply:
²supplies the required 5 volt power source to the
Crankshaft Position (CKP)

Page 404 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual INSTRUMENT CLUSTER
TABLE OF CONTENTS
page page
INSTRUMENT CLUSTER
DESCRIPTION..........................2
OPERATION............................4
DIAGNOSIS AND TESTING - INSTRUMENT
CLUSTER..............
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