2002 JEEP LIBERTY Powertrain control

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Page 218 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual The cooling system also provides a means of heat-
ing the passenger compartment and cooling the auto-
matic transmission fluid (if equipped). The cooling
system is pressurized and uses a centrifugal w

Page 235 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual The ECT sensor is a two-wire Negative Thermal
Coefficient (NTC) sensor. Meaning, as engine coolant
temperature increases, resistance (voltage) in the
sensor decreases. As temperature decreases, resis-

Page 241 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual RADIATOR FAN - ELECTRIC
DESCRIPTION
The fan (Fig. 12) is electrically controlled by the
powertrain control module (PCM) through the fan
control relay. This relay is located on the left wheel
house in

Page 249 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual OPERATION
OPERATION - COOLING SYSTEM
The cooling system regulates engine operating tem-
perature. It allows the engine to reach normal oper-
ating temperature as quickly as possible. It also
maintains

Page 268 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual ENGINE COOLANT
TEMPERATURE SENSOR
DESCRIPTION
The Engine Coolant Temperature (ECT) sensor is
used to sense engine coolant temperature. The sensor
protrudes into an engine water jacket.
The ECT sensor

Page 273 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual RADIATOR FAN - ELECTRIC
DESCRIPTION
The fan (Fig. 11) is electrically controlled by the
powertrain control module (PCM) through the fan
control relay. This relay is located on the left wheel
house in

Page 295 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual A chime warning system is standard factory-in-
stalled equipment on this model. The chime warning
system uses a single chime tone generator that is sol-
dered onto the electronic circuit board that is

Page 300 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual ELECTRONIC CONTROL MODULES
TABLE OF CONTENTS
page page
ELECTRONIC CONTROL MODULES
STANDARD PROCEDURE - PCM/SKIM
PROGRAMMING.......................1
BODY CONTROL MODULE
DESCRIPTION.....................
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