2002 JEEP LIBERTY connectors

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 allows the system to remain
in closed loop operation during periods of extended
idle.
In Closed Loop operation, the PCM monitors cer-
tain O2 sensor input(s) along with other inputs, and
adjusts the injector pulse width accordingly. During
Open Loop operation, the PCM ignores the O2 sensor
input. The PCM adjusts injector pulse width based
on preprogrammed (fixed) values and inputs from
other sensors.
Upstream Sensor - 2.4L Engine:The upstream
sensor (1/1) provides an input voltage to the PCM.
The input tells the PCM the oxygen content of the
exhaust gas. The PCM uses this information to fine
tune fuel delivery to maintain the correct oxygen con-
tent at the downstream oxygen sensor. The PCM will
change the air/fuel ratio until the upstream sensor
inputs a voltage that the PCM has determined will
make the downstream sensor output (oxygen content)
correct.
The upstream oxygen sensor also provides an input
to determine catalytic convertor efficiency.
Downstream Sensor - 2.4L Engine:The down-
stream oxygen sensor (1/2) is also used to determine
the correct air-fuel ratio. As the oxygen content
changes at the downstream sensor, the PCM calcu-
lates how much air-fuel ratio change is required. The
PCM then looks at the upstream oxygen sensor volt-
age and changes fuel delivery until the upstream
sensor voltage changes enough to correct the down-
stream sensor voltage (oxygen content).
The downstream oxygen sensor also provides an
input to determine catalytic convertor efficiency.
Upstream Sensors - 3.7L Engine:Two upstream
sensors are used (1/1 and 2/1). The 1/1 sensor is the
first sensor to receive exhaust gases from the #1 cyl-
inder. They provide an input voltage to the PCM. The
input tells the PCM the oxygen content of the
exhaust gas. The PCM uses this information to fine
tune fuel delivery to maintain the correct oxygen con-
tent at the downstream oxygen sensors. The PCM
will change the air/fuel ratio until the upstream sen-
sors input a voltage that the PCM has determined
will make the downstream sensors output (oxygen
content) correct.
The upstream oxygen sensors also provide an input
to determine mini-catalyst efficiency. Main catalytic
convertor efficiency is not calculated with this pack-
age.
Downstream Sensors - 3.7L Engine:Two down-
stream sensors are used (1/2 and 2/2). The down-
stream sensors are used to determine the correct air-fuel ratio. As the oxygen content changes at the
downstream sensor, the PCM calculates how much
air-fuel ratio change is required. The PCM then looks
at the upstream oxygen sensor voltage, and changes
fuel delivery until the upstream sensor voltage
changes enough to correct the downstream sensor
voltage (oxygen content).
The downstream oxygen sensors also provide an
input to determine mini-catalyst efficiency. Main cat-
alytic convertor efficiency is not calculated with this
package.
Engines equipped with either a downstream sen-
sor(s), or a post-catalytic sensor, will monitor cata-
lytic convertor efficiency. If efficiency is below
emission standards, the Malfunction Indicator Lamp
(MIL) will be illuminated and a Diagnostic Trouble
Code (DTC) will be set. Refer to Monitored Systems
in Emission Control Systems for additional informa-
tion.
REMOVAL
CAUTION: Never apply any type of grease to the
oxygen sensor electrical connector, or attempt any
soldering of the sensor wiring harness.
Refer to (Fig. 20), (Fig. 21) or (Fig. 22) for O2S
(oxygen sensor) location.
Fig. 20 OXYGEN SENSORS - 2.4L
1 - ELECTRICAL CONNECTORS
2 - UPSTREAM SENSOR (1/1)
3 - ELECTRICAL CONNECTORS
4 - DOWNSTREAM SENSOR (1/2)
KJFUEL INJECTION 14 - 41
OXYGEN SENSOR (Continued)

Fig. 21 OXYGEN SENSORS - UPSTREAM - 3.7L
1 - RIGHT UPSTREAM SENSOR (2/1)
2 - ELECTRICAL CONNECTORS3 - LEFT UPSTREAM SENSOR (1/1)
4 - ELECTRICAL CONNECTORS
Fig. 22 OXYGEN SENSORS - DOWNSTREAM - 3.7L
1 - ELECTRICAL CONNECTORS
2 - ELECTRICAL CONNECTORS3 - LEFT DOWNSTREAM SENSOR (1/2)
4 - RIGHT DOWNSTREAM SENSOR (2/2)
14 - 42 FUEL INJECTIONKJ
OXYGEN SENSOR (Continued)

WARNING: THE EXHAUST MANIFOLD, EXHAUST
PIPES AND CATALYTIC CONVERTER BECOME
VERY HOT DURING ENGINE OPERATION. ALLOW
ENGINE TO COOL BEFORE REMOVING OXYGEN
SENSOR.
(1) Raise and support vehicle.
(2) Disconnect wire connector from O2S sensor.
CAUTION: When disconnecting sensor electrical
connector, do not pull directly on wire going into
sensor.
(3) Remove O2S sensor with an oxygen sensor
removal and installation tool.
(4) Clean threads in exhaust pipe using appropri-
ate tap.
INSTALLATION
Threads of new oxygen sensors are factory coated
with anti-seize compound to aid in removal.DO
NOT add any additional anti-seize compound to
threads of a new oxygen sensor.
(1) Install O2S sensor. Tighten to 30 N´m (22 ft.
lbs.) torque.
(2) Connect O2S sensor wire connector.
(3) Lower vehicle.
THROTTLE BODY
DESCRIPTION
The throttle body is located on the intake manifold.
Fuel does not enter the intake manifold through the
throttle body. Fuel is sprayed into the manifold by
the fuel injectors.
OPERATION
Filtered air from the air cleaner enters the intake
manifold through the throttle body. The throttle body
contains an air control passage controlled by an Idle
Air Control (IAC) motor. The air control passage is
used to supply air for idle conditions. A throttle valve
(plate) is used to supply air for above idle conditions.
Certain sensors are attached to the throttle body.
The accelerator pedal cable, speed control cable and
transmission control cable (when equipped) are con-
nected to the throttle body linkage arm.
A (factory adjusted) set screw is used to mechani-
cally limit the position of the throttle body throttle
plate.Never attempt to adjust the engine idle
speed using this screw.All idle speed functions are
controlled by the PCM.
REMOVAL
2.4L
A (factory adjusted) set screw is used to mechani-
cally limit the position of the throttle body throttle
plate.Never attempt to adjust the engine idle
speed using this screw.All idle speed functions are
controlled by the Powertrain Control Module (PCM).
(1) Remove air cleaner tube at throttle body.
(2) Disconnect throttle body electrical connectors
at IAC motor and TPS.
(3) Remove all control cables from throttle body
(lever) arm. Refer to the Accelerator Pedal and Throt-
tle Cable section for removal/installation procedures.
(4) Disconnect necessary vacuum lines at throttle
body.
(5) Remove 3 throttle body mounting bolts (Fig.
23).
(6) Remove throttle body from intake manifold.
(7) Check condition of old throttle body-to-intake
manifold o-ring.
3.7L
A (factory adjusted) set screw is used to mechani-
cally limit the position of the throttle body throttle
plate.Never attempt to adjust the engine idle
speed using this screw.All idle speed functions are
controlled by the Powertrain Control Module (PCM).
(1) Remove air cleaner tube at throttle body.
(2) Disconnect throttle body electrical connectors
at IAC motor and TPS.
Fig. 23 THROTTLE BODY MOUNTING BOLTS - 2.4L
1 - THROTTLE BODY
2 - IGNITION COIL
3 - MOUNTING BOLTS (3)
KJFUEL INJECTION 14 - 43
OXYGEN SENSOR (Continued)

(3) Remove all control cables from throttle body
(lever) arm. Refer to the Accelerator Pedal and Throt-
tle Cable section for removal/installation procedures.
(4) Disconnect necessary vacuum lines at throttle
body.
(5) Remove 3 throttle body mounting bolts (Fig.
24).
(6) Remove throttle body from intake manifold.
(7) Check condition of old throttle body-to-intake
manifold o-ring (Fig. 25).
INSTALLATION
2.4L
(1) Check condition of throttle body-to-intake man-
ifold o-ring. Replace as necessary.
(2) Clean mating surfaces of throttle body and
intake manifold.(3) Install throttle body-to-intake manifold o-ring.
(4) Install throttle body to intake manifold.
(5) Install 3 mounting bolts. Tighten bolts to 12
N´m (105 in. lbs.) torque.
(6) Install control cables.
(7) Install electrical connectors.
(8) Install necessary vacuum lines.
(9) Install air cleaner duct at throttle body.
3.7L
(1) Check condition of throttle body-to-intake man-
ifold o-ring. Replace as necessary.
(2) Clean mating surfaces of throttle body and
intake manifold.
(3) Install throttle body-to-intake manifold o-ring.
(4) Install throttle body to intake manifold.
(5) Install 3 mounting bolts. Tighten bolts to 12
N´m (105 in. lbs.) torque.
(6) Install control cables.
(7) Install electrical connectors.
(8) Install necessary vacuum lines.
(9) Install air cleaner duct at throttle body.
Fig. 24 THROTTLE BODY MOUNTING BOLTS - 3.7L
1 - THROTTLE BODY
2 - MOUNTING BOLTS (3)
Fig. 25 THROTTLE BODY O-RING - 3.7L
1 - INTAKE MANIFOLD
2 - THROTTLE BODY O-RING
14 - 44 FUEL INJECTIONKJ
THROTTLE BODY (Continued)

LATCH
REMOVAL
(1) Remove the waterdam. (Refer to 23 - BODY/
DOOR - FRONT/WATERDAM - REMOVAL)
(2) Disconnect the exterior handle rod at the han-
dle.
(3) Disconnect the lock and lock cylinder rods at
the latch.
(4) Remove the screws and remove the latch
assembly. (Fig. 6)
(5) Disconnect the electrical connectors.
INSTALLATION
(1) Connect the latch electrical connectors.
(2) Install the latch assembly into the door and
install the screws.
(3) Tighten the latch screws to 11 N´m (95 in. lbs.).
(4) Connect the lock cylinder and lock actuator
rods at the latch.
(5) Connect the exterior handle actuator rod at the
handle.
(6) Adjust the latch as needed. (Refer to 23 -
BODY/DOOR - FRONT/LATCH - ADJUSTMENTS)
(7) Install the waterdam. (Refer to 23 - BODY/
DOOR - FRONT/WATERDAM - INSTALLATION)
ADJUSTMENTS
ADJUSTMENT
(1) Locate access hole and remove the mylar tape
covering it. (Fig. 7)
(2) Insert a 5/32-inch hex-wrench through hole and
into adjustment screw. Loosen screw.
(3) Operate outside handle several times to release
any restriction because of mis-alignment.
(4) Tighten adjustment screw to 3 N´m (30 in.
lbs.).
(5) Test handle and lock cylinder for proper opera-
tion.
LATCH STRIKER
REMOVAL
(1) Remove the bolts. (Fig. 8)
(2) Remove the latch striker and the spacer, if
equipped.
INSTALLATION
(1) Install the striker and spacer, if equipped.
(2) Install the bolts and tighten to 28 N´m (21 ft.
lbs.).
(3) Adjust the door as necessary. (Refer to 23 -
BODY/BODY STRUCTURE/GAP AND FLUSH -
SPECIFICATIONS)
Fig. 6 LATCH
1 - LOCK ACTUATOR ROD
2 - PLASTIC COVER
3 - LATCH ASSEMBLY
4 - DOOR
5 - SCREWS
Fig. 7 LATCH ADJUSTMENT SCREW
1 - DOOR LATCH
2 - MYLAR TAPE
3 - ADJUSTMENT SCREW
23 - 124 DOOR - FRONTKJ

LOCK CYLINDER
REMOVAL
(1) Remove the exterior handle. (Refer to 23 -
BODY/DOOR - FRONT/EXTERIOR HANDLE -
REMOVAL)
(2) Remove the clip and remove the lock cylinder
lever and switch, if equipped.
(3) Remove the screw and remove the lock cylin-
der. (Fig. 9)
INSTALLATION
(1) Install the lock cylinder and install the retain-
ing screw.
(2) Install the lock cylinder switch, if equipped,
lever and retaining clip.
(3) Install the exterior handle. (Refer to 23 -
BODY/DOOR - FRONT/EXTERIOR HANDLE -
INSTALLATION)
TRIM PANEL
REMOVAL
(1) Remove the inside handle screw plug and
remove the screw. (Fig. 10)
(2) Remove the pull handle screw.(3) Using a trim stick C-4755 or equivalent, disen-
gage the trim panel clips and remove the trim panel.
(4) Disconnect the electrical connectors and the
inside handle actuator rod. (Fig. 11)
Fig. 8 LATCH STRIKER
1 - B-PILLAR
2 - SPACER
3 - STRIKER
4 - BOLTS (2)
Fig. 9 LOCK CYLINDER
1 - SCREW
2 - LOCK CYLINDER ASSEMBLY
3 - EXTERIOR HANDLE
Fig. 10 TRIM PANEL
1 - ALIGNMENT PIN HOLES
2 - LATCH ACTUATOR ROD
3 - SCREWS (2)
4 - TRIM PANEL CLIPS
5 - INSIDE HANDLE SCREW PLUG
KJDOOR - FRONT 23 - 125
LATCH STRIKER (Continued)

INSTALLATION
(1) Connect the inside handle actuator rod and the
electrical connectors.
(2) Position the trim panel and seat the clips fully.
(3) Instal the screws and install the screw plug.
WATERDAM
REMOVAL
(1) Remove the trim panel. (Refer to 23 - BODY/
DOOR - FRONT/TRIM PANEL - REMOVAL)
(2) Remove the door speaker.
(3) Peal waterdam away from inner door panel
and off of the latch linkages (Fig. 12).
INSTALLATION
(1) Position the wire harness and actuator rods
through the holes in the waterdam.
(2) Place waterdam onto the door.
(3) Install the trim panel. (Refer to 23 - BODY/
DOOR - FRONT/TRIM PANEL - INSTALLATION)
WINDOW REGULATOR -
MANUAL
REMOVAL
(1) Remove the door glass. (Refer to 23 - BODY/
DOOR - FRONT/DOOR GLASS - REMOVAL)
(2) Loosen the bolts. (Fig. 13)
(3) Disconnect the runout tube clip and remove the
regulator.
INSTALLATION
(1) Install the regulator assembly.
(2) Tighten the bolts to 9 N´m (80 in. lbs.) using
the sequence shown. (Fig. 14)
(3) Install the door glass. (Refer to 23 - BODY/
DOOR - FRONT/DOOR GLASS - INSTALLATION)
WINDOW REGULATOR -
ELECTRIC
REMOVAL
(1) Remove the door glass. (Refer to 23 - BODY/
DOOR - FRONT/DOOR GLASS - REMOVAL)
(2) Loosen the bolts. (Fig. 15)
(3) Disconnect the runout tube clip.
(4) Disconnect the electrical connector and remove
the regulator.
INSTALLATION
(1) Install the regulator assembly.
(2) Connect the electrical connector.
Fig. 11 TRIM PANEL CONNECTIONS
1 - ELECTRICAL CONNECTORS
2 - ALIGNMENT PINS
3 - LATCH ACTUATOR ROD
4 - TRIM PANEL
Fig. 12 FRONT DOOR WATERDAM
1 - DOOR
2 - LOCK ACTUATOR ROD
3 - INSIDE HANDLE ACTUATOR ROD AND HOLE
4 - ELECTRICAL CONNECTOR
23 - 126 DOOR - FRONTKJ
TRIM PANEL (Continued)

HINGE
REMOVAL
(1) Remove the door. (Refer to 23 - BODY/DOORS
- REAR/DOOR - REMOVAL)
(2) Remove the upper b-pillar trim. (Refer to 23 -
BODY/INTERIOR/B-PILLAR UPPER TRIM -
REMOVAL)
(3) Remove the two door hinge bolts from the
inside of the b-pillar.
(4) Remove the exterior bolts attaching the door
hinges to the b-pillar.
INSTALLATION
(1) Install the hinges.
(2) Install the exterior bolts and tighten to 28 N´m
(21 ft. lbs.).
(3) Install the two inner hinge bolts and tighten to
28 N´m (21 ft. lbs.).
(4) Adjust the door as necessary. (Refer to 23 -
BODY/BODY STRUCTURE/GAP AND FLUSH -
SPECIFICATIONS)
(5) Install the upper b-pillar trim. (Refer to 23 -
BODY/INTERIOR/B-PILLAR UPPER TRIM -
INSTALLATION)
(6) Install the door. (Refer to 23 - BODY/DOORS -
REAR/DOOR - INSTALLATION)
LATCH
REMOVAL
(1) Remove the door glass. (Refer to 23 - BODY/
DOORS - REAR/DOOR GLASS - REMOVAL)(2) Disconnect the actuator rods.
(3) Remove the screws and remove the latch
assembly. (Fig. 7)
(4) Disconnect the electrical connectors.
INSTALLATION
(1) Connect the latch electrical connectors.
(2) Install the latch assembly into the door and
install the screws.
(3) Tighten the latch screws to 11 N´m (95 in. lbs.).
(4) Connect the actuator rods.
(5) Install the door glass. (Refer to 23 - BODY/
DOORS - REAR/DOOR GLASS - INSTALLATION)
(6) Adjust the latch as needed. (Refer to 23 -
BODY/DOORS - REAR/LATCH - ADJUSTMENTS)
ADJUSTMENTS
ADJUSTMENT
(1) Locate access hole and remove the mylar tape
covering it. (Fig. 8)
(2) Insert a 5/32-inch hex-wrench through hole and
into adjustment screw. Loosen screw.
(3) Operate outside handle several times to release
any restriction because of mis-alignment.
(4) Tighten adjustment screw to 3 N´m (30 in.
lbs.).
(5) Test handle and lock cylinder for proper opera-
tion.
Fig. 6 GLASS RUN CHANNEL
1 - BOLTS (3)
2 - QUARTER GLASS
3 - GLASS RUN CHANNEL ASSEMBLY
Fig. 7 LATCH
1-LATCH
2 - SCREWS (4)
KJDOORS - REAR 23 - 131
GLASS RUN CHANNEL (Continued)