2002 JEEP LIBERTY automatic transmission

TERMINOLOGY
This is a list of terms and definitions used in the
wiring diagrams.
LHD .................Left Hand Drive Vehicles
RHD................Right Hand Drive Vehicles
ATX . . Automatic Transmissions-Front Wheel Drive
MTX....Manual Transmissions-Front Wheel Drive
AT ....Automatic Transmissions-Rear Wheel Drive
MT .....Manual Transmissions-Rear Wheel Drive
SOHC...........Single Over Head Cam Engine
DOHC..........Double Over Head Cam Engine
Built-Up-Export........ Vehicles Built For Sale In
Markets Other Than North America
Except-Built-Up-Export . . Vehicles Built For Sale In
North America
DESCRIPTION - CIRCUIT INFORMATION
Each wire shown in the diagrams contains a code
which identifies the main circuit, part of the main
circuit, gage of wire, and color (Fig. 4).
WIRE COLOR CODE CHART
COLOR CODE COLOR
BL BLUE
BK BLACK
BR BROWN
DB DARK BLUE
DG DARK GREEN
GY GRAY
LB LIGHT BLUE
LG LIGHT GREEN
COLOR CODE COLOR
OR ORANGE
PK PINK
RD RED
TN TAN
VT VIOLET
WT WHITE
YL YELLOW
* WITH TRACER
DESCRIPTION - CIRCUIT FUNCTIONS
All circuits in the diagrams use an alpha/numeric
code to identify the wire and it's function. To identify
which circuit code applies to a system, refer to the
Circuit Identification Code Chart. This chart shows
the main circuits only and does not show the second-
ary codes that may apply to some models.
CIRCUIT IDENTIFICATION CODE CHART
CIRCUIT FUNCTION
A BATTERY FEED
B BRAKE CONTROLS
C CLIMATE CONTROLS
D DIAGNOSTIC CIRCUITS
E DIMMING ILLUMINATION
CIRCUITS
F FUSED CIRCUITS
G MONITORING CIRCUITS
(GAUGES)
H OPEN
I NOT USED
J OPEN
K POWERTRAIN CONTROL
MODULE
L EXTERIOR LIGHTING
M INTERIOR LIGHTING
N NOT USED
O NOT USED
P POWER OPTION (BATTERY
FEED)
Q POWER OPTIONS (IGNITION
FEED)
R PASSIVE RESTRAINT
S SUSPENSION/STEERING
T TRANSMISSION/TRANSAXLE/
TRANSFER CASE
Fig. 4 WIRE CODE IDENTIFICATION
1 - COLOR OF WIRE (LIGHT BLUE WITH YELLOW TRACER
2 - GAGE OF WIRE (18 GAGE)
3 - PART OF MAIN CIRCUIT (VARIES DEPENDING ON
EQUIPMENT)
4 - MAIN CIRCUIT IDENTIFICATION
KJ8W-01 WIRING DIAGRAM INFORMATION8Wa-01-5
WIRING DIAGRAM INFORMATION (Continued)

WARNING: BE SURE THAT THE IGNITION SWITCH
ALWAYS IS IN THE OFF POSITION, UNLESS THE
PROCEDURE REQUIRES IT TO BE ON.
WARNING: SET THE PARKING BRAKE WHEN
WORKING ON ANY VEHICLE. AN AUTOMATIC
TRANSMISSION SHOULD BE IN PARK. A MANUAL
TRANSMISSION SHOULD BE IN NEUTRAL.
WARNING: OPERATE THE ENGINE ONLY IN A
WELL-VENTILATED AREA.
WARNING: KEEP AWAY FROM MOVING PARTS
WHEN THE ENGINE IS RUNNING, ESPECIALLY THE
FAN AND BELTS.
WARNING: TO PREVENT SERIOUS BURNS, AVOID
CONTACT WITH HOT PARTS SUCH AS THE RADIA-
TOR, EXHAUST MANIFOLD(S), TAIL PIPE, CATA-
LYTIC CONVERTER AND MUFFLER.
WARNING: DO NOT ALLOW FLAME OR SPARKS
NEAR THE BATTERY. GASES ARE ALWAYS
PRESENT IN AND AROUND THE BATTERY.
WARNING: ALWAYS REMOVE RINGS, WATCHES,
LOOSE HANGING JEWELRY AND AVOID LOOSE
CLOTHING.
DIAGNOSIS AND TESTING - WIRING HARNESS
TROUBLESHOOTING TOOLS
When diagnosing a problem in an electrical circuit
there are several common tools necessary. These tools
are listed and explained below.
²Jumper Wire - This is a test wire used to con-
nect two points of a circuit. It can be used to bypass
an open in a circuit.
WARNING: NEVER USE A JUMPER WIRE ACROSS
A LOAD, SUCH AS A MOTOR, CONNECTED
BETWEEN A BATTERY FEED AND GROUND.
²Voltmeter - Used to check for voltage on a cir-
cuit. Always connect the black lead to a known good
ground and the red lead to the positive side of the
circuit.
CAUTION: Most of the electrical components used
in today's vehicles are Solid State. When checking
voltages in these circuits, use a meter with a 10 -
megohm or greater impedance rating.²Ohmmeter - Used to check the resistance
between two points of a circuit. Low or no resistance
in a circuit means good continuity.
CAUTION: Most of the electrical components used
in today's vehicles are Solid State. When checking
resistance in these circuits use a meter with a 10 -
megohm or greater impedance rating. In addition,
make sure the power is disconnected from the cir-
cuit. Circuits that are powered up by the vehicle's
electrical system can cause damage to the equip-
ment and provide false readings.
²Probing Tools - These tools are used for probing
terminals in connectors (Fig. 5). Select the proper
size tool from Special Tool Package 6807, and insert
it into the terminal being tested. Use the other end
of the tool to insert the meter probe.
INTERMITTENT AND POOR CONNECTIONS
Most intermittent electrical problems are caused
by faulty electrical connections or wiring. It is also
possible for a sticking component or relay to cause a
problem. Before condemning a component or wiring
assembly, check the following items.
²Connectors are fully seated
²Spread terminals, or terminal push out
²Terminals in the wiring assembly are fully
seated into the connector/component and locked into
position
²Dirt or corrosion on the terminals. Any amount
of corrosion or dirt could cause an intermittent prob-
lem
²Damaged connector/component casing exposing
the item to dirt or moisture
²Wire insulation that has rubbed through causing
a short to ground
²Some or all of the wiring strands broken inside
of the insulation
²Wiring broken inside of the insulation
Fig. 5 PROBING TOOL
1 - SPECIAL TOOL 6801
2 - PROBING END
KJ8W-01 WIRING DIAGRAM INFORMATION8Wa-01-7
WIRING DIAGRAM INFORMATION (Continued)

INSTALLATION
(1) Position the insulator mount and install the
insulator mount through bolt.
(2) Lower the engine until the cylinder block-to-in-
sulator mount bolts can be installed.
(3) Remove the jack and block of wood.
(4) Torque the cylinder block-to-insulator mount
bolts to 61 N´m ( 45 ft. lbs.).
(5) Install and torque the through bolt retaining
nut to 61 N´m (45 ft. lbs.).
(6) Install the fan blade, fan clutch and fan
shroud.
REAR MOUNT
REMOVAL
NOTE: A resilient rubber cushion supports the
transmission at the rear between the transmission
extension housing and the rear support crossmem-
ber or skid plate.
(1) Disconnect negative cable from battery.
(2) Raise the vehicle and support the transmission.
(3) Remove the nuts holding the support cushion
to the crossmember. Remove the crossmember.
MANUAL TRANSMISSION
²Remove the support cushion nuts and remove
the cushion.
²Remove the transmission support bracket bolts
and remove the bracket from the transmission.
AUTOMATIC TRANSMISSION
²Remove the support cushion bolts and remove
the cushion and the support bracket from the trans-
mission (4WD) or from the adaptor bracket (2WD).
²On 2WD vehicles, remove the bolts holding the
transmission support adaptor bracket to the trans-
mission. Remove the adaptor bracket.
INSTALLATION
MANUAL TRANSMISSION:
(1) Install the transmission support bracket to the
transmission. Install the bolts and tighten to 46 N´m
(34 ft. lbs.) torque.
(2) Install the support cushion to the support
bracket. Install the nuts and tighten to 75 N´m (55
ft. lbs.) torque.
(3) Position the crossmember onto the support
cushion studs. Install the stud nuts and tighten to 22
N´m (192 in. lbs) torque.
(4) Install crossmember-to-sill bolts and tighten to
41 N´m (30 ft. lbs.) torque.
(5) Remove the transmission support.
(6) Lower the vehicle.
(7) Connect negative cable to battery.
AUTOMATIC TRANSMISSION:
(1) On 2WD vehicles, position the transmission
support adaptor bracket to the transmission. Install
the bolts and tighten to 75 N´m (55 ft. lbs.) torque.
(2) Position the transmission support bracket and
support cushion to the adaptor bracket (2WD) or the
transmission (4WD). Install the bolts and tighten to
75 N´m (55 ft. lbs.) torque.
(3) Position the crossmember onto the support
cushion studs. Install the stud nuts and tighten to 22
N´m (192 in. lbs) torque.
(4) Install crossmember-to-sill bolts and tighten to
41 N´m (30 ft. lbs.) torque.
(5) Remove the transmission support.
(6) Lower the vehicle.
(7) Connect negative cable to battery.
LUBRICATION
DESCRIPTION
The lubrication system is a full flow filtration pres-
sure feed type.
Fig. 68 Engine Insulator Mount 3.7 Right
1 - MOUNT
2 - THRU BOLT
3 - BOLT
4 - NUT
KJENGINE - 3.7L 9 - 57
FRONT MOUNT (Continued)

(1) Inspect air cleaner, induction system and
intake manifold to insure system is dry and clear of
foreign material.
(2) Remove negative battery cable.
(3) Place a shop towel around the spark plugs
when removing them from the engine. This will catch
any fluid that may possibly be in the cylinder under
pressure.
(4) With all spark plugs removed, rotate engine
crankshaft using a breaker bar and socket.
(5) Identify the fluid in the cylinder(s) (i.e., cool-
ant, fuel, oil or other).
(6) Make sure all fluid has been removed from the
cylinders. Inspect engine for damage (i.e., connecting
rods, pistons, valves, etc.)
(7) Repair engine or components as necessary to
prevent this problem from re-occurring.
CAUTION: Squirt approximately one teaspoon of oil
into the cylinders, rotate engine to lubricate the cyl-
inder walls to prevent damage on restart.
(8) Install new spark plugs.
(9) Drain engine oil and remove oil filter.
(10) Install a new oil filter.
(11) Fill engine with specified amount of approved
oil.
(12) Connect negative battery cable.
(13) Start engine and check for any leaks.
STANDARD PROCEDURE - FORM-IN-PLACE
GASKETS AND SEALERS
There are numerous places where form-in-place
gaskets are used on the engine. Care must be taken
when applying form-in-place gaskets to assure
obtaining the desired results.Do not use form-in-
place gasket material unless specified.Bead size,
continuity, and location are of great importance. Too
thin a bead can result in leakage while too much can
result in spill-over which can break off and obstruct
fluid feed lines. A continuous bead of the proper
width is essential to obtain a leak-free gasket.
There are numerous types of form-in-place gasket
materials that are used in the engine area. Mopart
Engine RTV GEN II, MopartATF-RTV, and Mopart
Gasket Maker gasket materials, each have different
properties and can not be used in place of the other.
MOPARtENGINE RTV GEN IIis used to seal
components exposed to engine oil. This material is a
specially designed black silicone rubber RTV that
retains adhesion and sealing properties when
exposed to engine oil. Moisture in the air causes the
material to cure. This material is available in three
ounce tubes and has a shelf life of one year. After one
year this material will not properly cure. Alwaysinspect the package for the expiration date before
use.
MOPARtATF RTVis a specifically designed
black silicone rubber RTV that retains adhesion and
sealing properties to seal components exposed to
automatic transmission fluid, engine coolants, and
moisture. This material is available in three ounce
tubes and has a shelf life of one year. After one year
this material will not properly cure. Always inspect
the package for the expiration date before use.
MOPARtGASKET MAKERis an anaerobic type
gasket material. The material cures in the absence of
air when squeezed between two metallic surfaces. It
will not cure if left in the uncovered tube. The
anaerobic material is for use between two machined
surfaces. Do not use on flexible metal flanges.
MOPARtBED PLATE SEALANTis a unique
(green-in-color) anaerobic type gasket material that
is specially made to seal the area between the bed-
plate and cylinder block without disturbing the bear-
ing clearance or alignment of these components. The
material cures slowly in the absence of air when
torqued between two metallic surfaces, and will rap-
idly cure when heat is applied.
MOPARtGASKET SEALANTis a slow drying,
permanently soft sealer. This material is recom-
mended for sealing threaded fittings and gaskets
against leakage of oil and coolant. Can be used on
threaded and machined parts under all tempera-
tures. This material is used on engines with multi-
layer steel (MLS) cylinder head gaskets. This
material also will prevent corrosion. MopartGasket
Sealant is available in a 13 oz. aerosol can or 4oz./16
oz. can w/applicator.
SEALER APPLICATION
MopartGasket Maker material should be applied
sparingly 1 mm (0.040 in.) diameter or less of sealant
to one gasket surface. Be certain the material sur-
rounds each mounting hole. Excess material can eas-
ily be wiped off. Components should be torqued in
place within 15 minutes. The use of a locating dowel
is recommended during assembly to prevent smear-
ing material off the location.
MopartEngine RTV GEN II or ATF RTV gasket
material should be applied in a continuous bead
approximately 3 mm (0.120 in.) in diameter. All
mounting holes must be circled. For corner sealing, a
3.17 or 6.35 mm (1/8 or 1/4 in.) drop is placed in the
center of the gasket contact area. Uncured sealant
may be removed with a shop towel. Components
should be torqued in place while the sealant is still
wet to the touch (within 10 minutes). The usage of a
locating dowel is recommended during assembly to
prevent smearing material off the location.
9s - 10 ENGINEKJ
ENGINE - 2.4L (Continued)

REAR MOUNT
REMOVAL
NOTE: A resilient rubber cushion supports the
transmission at the rear between the transmission
extension housing and the rear support crossmem-
ber or skid plate.
(1) Disconnect negative cable from battery.
(2) Raise the vehicle and support the transmission.
(3) Remove the nuts holding the support cushion
to the crossmember. Remove the crossmember.
MANUAL TRANSMISSION
a. Remove the support cushion nuts and remove
the cushion.
b. Remove the transmission support bracket bolts
and remove the bracket from the transmission.
AUTOMATIC TRANSMISSION
c. Remove the support cushion bolts and remove
the cushion and the support bracket from the trans-
mission (4WD) or from the adaptor bracket (2WD).
d. On 2WD vehicles, remove the bolts holding the
transmission support adaptor bracket to the trans-
mission. Remove the adaptor bracket.
INSTALLATION
MANUAL TRANSMISSION:
(1) Install the support cushion to the transmission
(Fig. 74)or (Fig. 75). Install the bolts and tighten.
(2) Position the crossmember in the vehicle. Install
the crossmember to mount through bolt and nut.
(3) Install crossmember-to-sill bolts and tighten to
41 N´m (30 ft. lbs.) torque.
(4) Remove the transmission support.
(5) Lower the vehicle.
(6) Connect negative cable to battery.
AUTOMATIC TRANSMISSION:
(1) Install the transmission mount to transmission
(Fig. 76) and (Fig. 77). Install the bolts.
(2) Position the crossmember in the vehicle. Install
the crossmember to mount through bolt and nut.
(3) Remove the transmission support.
(4) Lower the vehicle.
(5) Connect negative cable to battery.
Fig. 74 TRANSMISSION MOUNT-2.4L MANUAL
TRANS
1 - TRANSMISSION MOUNT
2 - MOUNTING BOLT
Fig. 75 TRANSMISSION MOUNT 3.7L MANUAL
TRANS 2WD
1 - NUT
2 - BOLT
3 - TRANS MOUNT
KJENGINE9s-45

SPECIFICATIONS
TORQUE CHART
TORQUE SPECIFICATIONS
DESCRIPTION N´m Ft. Lbs. In. Lbs.
Tilt Steering Column
Steering Wheel Bolt54 40 Ð
Tilt Steering Column
Mounting Bolts17 Ð 150
Tilt Steering Column
Coupler Bolt49 36 Ð
Non-Tilt Steering Column
Steering Wheel Bolt54 40 Ð
Non-Tilt Steering Column
Mounting Bolts17 Ð 150
Non-Tilt Steering Column
Coupler Bolt49 36 Ð
Ignition Switch Screws 2 Ð 17
SPECIAL TOOLS
STEERING COLUMN
IGNITION SWITCH
DESCRIPTION
The electrical ignition switch is located on the
steering column. It is used as the main on/off switch-
ing device for most electrical components. The
mechanical key lock cylinder is used to engage/disen-
gage the electrical ignition switch.
DIAGNOSIS AND TESTING - IGNITION SWITCH
ELECTRICAL DIAGNOSIS
For ignition switch electrical schematics, Refer to
the appropriate section for the component.
MECHANICAL DIAGNOSIS (KEY DIFFICULT TO
ROTATE)
Vehicles equipped with an automatic trans-
mission and a floor mounted shifter:a cable is
used to connect the interlock device in the steering
column assembly, to the transmission floor shift
lever. This interlock system is used to lock the trans-
mission shifter in the PARK position when the key
lock cylinder is rotated to the LOCKED or ACCES-
SORY position. If the ignition key is difficult to
rotate to or from the LOCK or ACCESSORY position,
it may not be the fault of the key cylinder or the
steering column components. The brake transmission
shift interlock cable may be out of adjustment. (Refer
to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC
- 30RH/GEAR SHIFT CABLE - ADJUSTMENTS).
The interlock system within the steering column is
not serviceable. If repair is necessary, the steering
column assembly must be replaced. (Refer to 19 -
STEERING/COLUMN - REMOVAL).
Vehicles equipped with a manual transmis-
sion and a floor mounted shifter:on certain mod-
els, a button is located on the steering column behind
the ignition key lock cylinder. The button must be
manually depressed to allow rotation of the ignition
key lock cylinder to the LOCK or ACCESSORY posi-
tion. If it is difficult to rotate the key to the LOCK or
ACCESSORY position, the lever mechanism may be
defective. This mechanism is not serviceable. If
repair is necessary, the steering column assembly
must be replaced.(Refer to 19 - STEERING/COL-
UMN - REMOVAL).
Puller C-3894-A
19 - 8 COLUMNKJ
COLUMN (Continued)

KEY-IN IGNITION SWITCH
DESCRIPTION
The key-in ignition switch is integral to the igni-
tion switch, which is mounted on the left side of the
steering column, opposite the ignition lock cylinder.
It closes a path to ground for the instrument cluster
chime warning circuitry when the ignition key is
inserted in the ignition lock cylinder and the driver
door jamb switch is closed (driver door is open). The
key-in ignition switch opens the ground path when
the key is removed from the ignition lock cylinder.
The key-in ignition switch cannot be repaired and,
if faulty or damaged, the entire ignition switch must
be replaced. (Refer to 19 - STEERING/COLUMN/IG-
NITION SWITCH - REMOVAL).
DIAGNOSIS AND TESTING - KEY-IN IGNITION
SWITCH
For circuit descriptions and diagrams, Refer to the
appropriate sections on the individual components.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO ELECTRICAL - PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Disconnect and isolate the battery negative
cable. Remove the steering column shrouds. Unplug
the key-in ignition switch wire harness connector
from the ignition switch.
(2) Check for continuity between the key-in switch
sense circuit and the left front door jamb switch
sense circuit terminals of the key-in ignition switch.
There should be continuity with the key in the igni-
tion lock cylinder, and no continuity with the key
removed from the ignition lock cylinder. If OK, go to
Step 3. If not OK, replace the faulty ignition switch
assembly.
(3) Check for continuity between the left front door
jamb switch sense circuit cavity of the key-in ignition
switch wire harness connector and a good ground.
There should be continuity with the driver door open,
and no continuity with the driver door closed. If OK,
see the diagnosis for Instrument Cluster in this
group. If not OK, repair the circuit to the driver door
jamb switch as required.
LOCK CYLINDER
REMOVAL
The ignition key must be in the key cylinder for
cylinder removal. The key cylinder must be removed
first before removing ignition switch.
(1) If equipped with an automatic transmission,
place shifter in PARK position.
(2) Remove the lower shroud cover.
(3) Remove the remote keyless entry (R.K.E.) mod-
ule.
(4) Remove the halo ring around the lock cylinder.
(5) Rotate key to ON position.
(6) A release tang is located on bottom of key cyl-
inder (Fig. 10).
(7) Position a small screwdriver or pin punch into
tang access hole on bottom of steering column (Fig.
11).
(8) Push the pin punch up while pulling key cylin-
der from steering column.
Fig. 10 LOCK CYLINDER RELEASE TANG
1 - Lock Cylinder
2 - Release Tang
19 - 10 COLUMNKJ

NOTE: Power steering pumps have different pres-
sure rates and are not interchangeable with other
pumps.
STANDARD PROCEDURE - POWER STEERING
PUMP - INITIAL OPERATION
WARNING: THE FLUID LEVEL SHOULD BE
CHECKED WITH ENGINE OFF TO PREVENT INJURY
FROM MOVING COMPONENTS.
CAUTION: Use MOPAR Power Steering Fluid or
equivalent. Do not use automatic transmission fluid
and do not overfill.
Wipe filler cap clean, then check the fluid level.
The dipstick should indicateCOLDwhen the fluid is
at normal ambient temperature.
(1) Fill the pump fluid reservoir to the proper level
and let the fluid settle for at least two minutes.
(2) Raise the front wheels off the ground.
(3) Slowly turn the steering wheel right and left,
lightly contacting the wheel stops at least 20 times.
(4) Check the fluid level add if necessary.
(5) Lower the vehicle, start the engine and turn
the steering wheel slowly from lock to lock.
(6) Stop the engine and check the fluid level and
refill as required.
CAUTION: Do not run a vehicle with foamy fluid for
an extended period. This may cause pump damage.
(7) If the fluid is extremely foamy or milky look-
ing, allow the vehicle to stand a few minutes and
repeat the procedure.
(8) Add fluid if necessary. Repeat the above proce-
dure until the fluid level remains constant after run-
ning the engine.
REMOVAL
REMOVAL - 3.7L
(1) Siphon out as much power steering fluid as
possible.
(2) Remove the radiator cross member (Refer to 23
- BODY/EXTERIOR/RADIATOR CROSSMEMBER -
REMOVAL).
(3) Remove the engine cooling fan (Refer to 7 -
COOLING/ENGINE/RADIATOR FAN - REMOVAL).
(4) Remove the fan shroud
(5) Remove the serpentine drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
REMOVAL).
(6) Remove the power steering high pressure hose
at the pump.
(7) Remove the return hose at the pump.
(8) Remove the three bolts securing the pump to
the bracket thru the holes in the pulley. (Fig. 3)
(9) Remove the pump from the vehicle.
REMOVAL - 2.4L
CAUTION: On vehicles equipped with the 2.4L, Do
not reuse the old power steering pump pulley it is
not intended for reuse. A new pulley must be
installed if removed.
(1) Siphon out as much power steering fluid as
possible.
(2) Remove the serpentine drive belt.
(3) Remove the power steering high pressure hose
at the pump using care not to remove the flow con-
trol valve.
(4) Remove the return hose at the pump.
Fig. 2 FLUID RESERVOIR - 2.4L
Fig. 3 POWER STEERING PUMP - 3.7L
1 - MOUNTING BOLTS
2 - RESERVOIR
3 - STEEL PULLEY
19 - 18 PUMPKJ
PUMP (Continued)