2002 JEEP LIBERTY lock

CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
Right Door Lock Switch (Except
Base)BK In Right Front Door 41
Right Fog Lamp BK Right Side of Bumper N/S
Right Front Door Ajar Switch (Base) BK In Right Front Door N/S
Right Front Door Lock Motor/Ajar
Switch (Except Base)BK In Right Front Door 41
Right Front Door Speaker BK In Right Front Door 41
Right Front Impact Sensor BK Right Front Side of Engine
Compartment28
Right Front Park/Turn Signal Lamp BK At Lamp N/S
Right Front Power Window Motor LG In Right Front Door 41
Right Front Wheel Speed Sensor BK Right Rear Lower Side of
Engine Compartment25
Right Headlamp (BUX) Right Front Side of Engine
CompartmentN/S
Right Headlamp (Except BUX) DB Right Front Side of Engine
CompartmentN/S
Right Heated Seat Assembly LG At Right Seat N/S
Right Heated Seat Switch BK At Right Seat N/S
Right Instrument Panel Lamp BK Right Side of Instrument
PanelN/S
Right Instrument Panel Speaker WT Right Side of Instrument
Panel33, 37
Right Leveling Motor (BUX) BK At Right Headlamp N/S
Right Position Lamp (BUX) BK Right Front Corner of Vehicle N/S
Right Power Mirror WT In Right Front Door 41
Right Power Seat Motors BK At Right Seat N/S
Right Power Seat Switch GN At Right Seat N/S
Right Rear Door Ajar Switch (Base) BK In Right Rear Door N/S
Right Rear Door Lock Motor/Ajar
Switch (Except Base)BK In Right Rear Door 42
Right Rear Door Speaker At Speaker 42
Right Rear Power Window Motor LG In Right Rear Door 42
Right Remote Radio Switch BK On Steering Wheel N/S
Right Side Impact Airbag Control
Module (RSIACM)YL Lower Right B-Pillar 34, 39
Right Side Marker Lamp BK Right Front Fender N/S
Right Side Repeater Lamp (BUX) BK Right Front Fender N/S
Right Speed Control Switch WT On Steering Wheel N/S
Right Tail/Stop Lamp BK Right Rear Quarter Panel 45
Right Visor/Vanity Lamp WT On Visor N/S
Sentry Key Immobilizer Module BK Under Left Side of
Instrument PanelN/S
Shifter Assembly WT Center Console 36, 40
8Wa - 91 - 8 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONKJ
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
Siren (BUX) Right Front Side of Engine
Compartment28
Speed Control Servo BK Right Rear Side of Engine
Compartment27
Sunroof Motor LG Overhead Console N/S
Sunroof Switch BK Overhead Console N/S
Tailgate Cylinder Lock Switch LG In Tailgate 46
Tailgate Flip-Up Ajar Switch GY In Tailgate 46
Tailgate Lock Motor/Ajar Switch BK In Tailgate 46
Throttle Position Sensor WT On Throttle Body 1
Trailer Tow Brake Lamp Relay Right Quarter Panel 47
Trailer Tow Circuit Breaker Right Quarter Panel N/S
Trailer Tow Connector BK At Trailer Hitch 47, 48
Trailer Tow Right Turn Relay Right Quarter Panel 47
Trailer Tow Relay Right Quarter Panel 47
Trailer Tow Left Turn Relay Right Quarter Panel 47
Transfer Case Position Sensor BK Rear Side of Transmission 5, 7, 11, 12, 22
Transmission Control Module (3.7L)
(LHD)BK Right Rear Side of Engine
Compartment8, 9
Transmission Control Module (3.7L)
(RHD)BK Left Rear Side of Engine
Compartment10
Transmission Solenoid/TRS
Assembly (3.7L)GY Left Side of Transmission 5
Under Hood Lamp BK Underside of Hood 24
Washer Fluid Level Switch LG At Washer Fluid Reservoir 28
Water In Fuel Sensor (Diesel) Left Rear Side of Engine
Compartment19
GROUNDS
GROUND NUMBER LOCATION FIG.
G100 Left Side of Engine Compartment 8, 9, 10, 14, 19
G101 (2.4L) Left Side of Engine Compartment 11
G102 (LHD) Right Rear Side of Engine Compartment 9
G102 (RHD) Left Rear Side of Engine Compartment 10
G103 (3.7L) Right Front Side of Engine 4
G103 (Diesel) Right Front Side of Engine 20
G104 Near Engine Control Module C2 19
G105 Left Side of Engine Compartment N/S
G106 Left Side of Engine Compartment N/S
G110 Left Side of Engine Compartment 30
G111 Left Front Side of Engine Compartment 29
G112 Left Front Side of Engine Compartment 29
G200 Near Body Control Module N/S
KJ8W-91 CONNECTOR/GROUND/SPLICE LOCATION8Wa-91-9
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

GROUND NUMBER LOCATION FIG.
G201 Under Center Console 33, 37
G202 Left Kick Panel (Black Connector) N/S
G203 Under Center of Instrument Panel N/S
G300 Left Front Seat 35
G301 Under Center Console N/S
G302 Right Front Seat 39
G310 Right Quarter Panel 44, 45
G311 Left Quarter Panel 43
G312 Left Quarter Panel N/S
G320 At Fuel Tank N/S
SPLICES
SPLICE NUMBER LOCATION FIG.
S101 Near T/O to Power Distribution Center N/S
S104 Near T/O to Power Distribution Center N/S
S106 Near T/O for G112 N/S
S107 (Diesel) In T/O for C100 32
S108 Near T/O for C106 29
S109 In Trough Near T/O for Radiator Fan Relay N/S
S110 Near T/O for C106 29
S111 In Trough Near T/O for Radiator Fan Relay N/S
S112 Near T/O to Power Distribution Center N/S
S113 (LHD) In T/O for C100 32
S114 In T/O for C100 N/S
S115 Near T/O for Engine Control Module N/S
S118 In T/O for C100 32
S121 Near T/O to Power Distribution Center N/S
S122 In T/O for Controller Antilock Brake 30
S123 In Trough, Front of Engine Compartment N/S
S124 In T/O for Junction Block C3 N/S
S125 In T/O for Junction Block C3 N/S
S130 Near T/O for Left Headlamp N/S
S131 In T/O for Right Headlamp N/S
S140 Near T/O for Left Front Park/Turn Signal Lamp N/S
S141 Near T/O for Left Fog Lamp N/S
S142 Near T/O for Left Front Park/Turn Signal Lamp N/S
S143 Near T/O for Right Front Park/Turn Signal Lamp N/S
S144 Near T/O for Left Fog Lamp N/S
S145 Near T/O for Right Front Park/Turn Signal Lamp N/S
S146 Near T/O for Right Front Park/Turn Signal Lamp N/S
S151 (2.4L) Near T/O for C110 11, 12
S151 (3.7L) In Trough Near T/O for Fuel Injector No.3 1
8Wa - 91 - 10 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONKJ
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

SPLICE NUMBER LOCATION FIG.
S216 In T/O for Instrument Cluster N/S
S217 Near T/O for Multifunction Switch C2 N/S
S218 Near T/O for Multifunction Switch C2 N/S
S219 In T/O for Junction Block C3 N/S
S220 In T/O for Junction Block C3 N/S
S221 Near T/O for Left Speed Control Switch N/S
S222 Near T/O for Right Speed Control Switch N/S
S223 Near T/O for Left Remote Radio Switch N/S
S224 Near T/O for Right Remote Radio Switch N/S
S300 (LHD) Near T/O for C309 43
S300 (RHD) Near T/O for C310 45
S301 In T/O For Radio C1 N/S
S302 Near T/O for Rear Power Outlet 45
S303 Near T/O for Shifter Assembly 36
S304 Near T/O for License Lamp 45
S306 (LHD) Near T/O for G315 44
S306 (RHD) In T/O for C319 45
S308 (LHD) Near T/O for C309 43
S308 (RHD) Near T/O for Rear Power Outlet 45
S310 Near T/O for C310 N/S
S312 Near T/O for G315 N/S
S313 In T/O for Trailer Tow Relays 47
S314 In T/O for Trailer Tow Relays 47
S318 (LHD) Near T/O for G309 35
S318 (RHD) In T/O for C201 39
S319 (LHD) Near T/O for C201 33
S319 (RHD) Near T/O for Left Instrument Panel 37
S322 Near T/O for Left Instrument Panel 33, 37
S323 (LHD) Near T/O for Left Instrument Panel 33
S323 (RHD) Near T/O for Right Instrument Panel Speaker 37
S324 (Premium) Near T/O for Right Instrument Panel Speaker 33, 37
S325 Near T/O for C201 33, 37
S326 Near T/O for Heated Seat Module N/S
S327 Near T/O for Left Heated Seat Assembly N/S
S328 In T/O for Heated Seat Module N/S
S329 Near T/O for Right Heated Seat Switch N/S
S330 Near T/O for Heated Seat Module N/S
S331 Near T/O for Shifter Assembly N/S
S333 (LHD) Near T/O for G300 35
S333 (RHD) Near T/O for C307 38
S334 Near T/O for G302 34, 39
S336 (LHD) Near T/O for Left Instrument Panel 33
8Wa - 91 - 12 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONKJ
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

SPLICE NUMBER LOCATION FIG.
S336 (RHD) Near T/O for Right Instrument Panel Speaker 37
S338 Near T/O for C201 33, 37
S340 Near T/O for C201 33
S341 Near T/O for C201 33
S342 (Base) Near T/O for Right Instrument Panel Speaker 33
S344 Near T/O for Right Instrument Panel Speaker 33
S346 In T/O for Trailer Tow Relays 47
S347 Near T/O for Right Tail/Stop Lamp 45
S348 Near T/O for Right Tail/Stop Lamp 45
S349 Near T/O for License Lamp 45
S350 Near T/O for License Lamp 45
S351 In T/O for Rear Window Defogger 46
S352 In T/O for Rear Window Defogger N/S
S356 Near T/O for Center High Mounted Stop Lamp N/S
S360 Near T/O for Left Power Mirror 41
S361 Near T/O for Left Power Mirror 41
S362 Near T/O for Power Mirror Switch 41
S363 Near T/O for Left Front Door Speaker N/S
S364 Near T/O for Left Front Door Speaker N/S
S370 Near T/O for Right Power Mirror 41
S371 Near T/O for Right Door Lock Switch 41
S372 Near T/O for Right Front Door Speaker N/S
S373 Near T/O for Right Front Door Speaker N/S
S380 Near T/O for Rear Wiper Motor N/S
S381 Near T/O for Tailgate Cylinder Lock Switch N/S
S382 Near T/O for License Lamp N/S
S390 Near T/O for Intrusion Sensor N/S
S391 Near T/O for Left Visor/Vanity Lamp N/S
S392 Near T/O for Left Visor/Vanity Lamp N/S
S393 Near T/O for Intrusion Sensor N/S
KJ8W-91 CONNECTOR/GROUND/SPLICE LOCATION8Wa-91-13
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

ENGINE BLOCK
DESCRIPTION.........................39
STANDARD PROCEDURE - CYLINDER BORE
HONING............................39
CLEANING............................39
INSPECTION..........................40
CONNECTING ROD BEARINGS
STANDARD PROCEDURE - CONNECTING
ROD BEARING - FITTING...............40
CRANKSHAFT
DESCRIPTION.........................42
REMOVAL.............................43
INSPECTION..........................43
INSTALLATION.........................43
CRANKSHAFT MAIN BEARINGS
STANDARD PROCEDURE
MAIN BEARING - FITTING...............45
CRANKSHAFT OIL SEAL - FRONT
REMOVAL.............................46
INSTALLATION.........................47
CRANKSHAFT OIL SEAL - REAR
REMOVAL.............................48
INSTALLATION.........................48
FLEX PLATE
REMOVAL.............................49
INSTALLATION.........................49
PISTON & CONNECTING ROD
DESCRIPTION.........................49
STANDARD PROCEDURE
CONNECTING ROD BEARING - FITTING . . . 49
STANDARD PROCEDURE - PISTON
FITTING.............................50
REMOVAL.............................50
CLEANING............................51
INSPECTION..........................51
INSTALLATION.........................51
PISTON RINGS
STANDARD PROCEDURE - PISTON RING
FITTING.............................52
VIBRATION DAMPER
REMOVAL.............................54
INSTALLATION.........................55
STRUCTURAL COVER
DESCRIPTION.........................55
OPERATION...........................55
REMOVAL.............................55
INSTALLATION.........................55
FRONT MOUNT
REMOVAL.............................56
INSTALLATION.........................57
REAR MOUNT
REMOVAL.............................57
INSTALLATION.........................57
LUBRICATION
DESCRIPTION.........................57
OPERATION...........................58DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - ENGINE OIL
LEAK...............................60
DIAGNOSIS AND TESTING - ENGINE OIL
PRESSURE..........................60
DIAGNOSIS AND TESTING - REAR SEAL
AREA LEAKS.........................61
OIL
STANDARD PROCEDURE - ENGINE OIL.....61
OIL FILTER
REMOVAL.............................63
INSTALLATION.........................63
OIL PAN
DESCRIPTION.........................63
REMOVAL.............................63
CLEANING............................63
INSPECTION..........................63
INSTALLATION.........................64
OIL PRESSURE SENSOR/SWITCH
DESCRIPTION.........................65
OPERATION...........................65
REMOVAL.............................65
INSTALLATION.........................65
OIL PUMP
REMOVAL.............................65
DISASSEMBLY.........................65
INSPECTION..........................66
ASSEMBLY............................67
INSTALLATION.........................67
INTAKE MANIFOLD
DESCRIPTION.........................68
DIAGNOSIS AND TESTING - INTAKE
MANIFOLD LEAKS.....................68
REMOVAL.............................68
INSTALLATION.........................69
EXHAUST MANIFOLD
DESCRIPTION.........................69
REMOVAL.............................69
INSTALLATION.........................70
VALVE TIMING
DESCRIPTION.........................71
OPERATION...........................71
STANDARD PROCEDURE
MEASURING TIMING CHAIN WEAR.......71
SERVICE PROCEDURES...............72
BALANCE SHAFT
REMOVAL.............................74
INSTALLATION.........................74
TIMING BELT / CHAIN COVER(S)
REMOVAL.............................74
INSTALLATION.........................76
IDLER SHAFT
REMOVAL.............................77
INSTALLATION.........................77
TIMING BELT/CHAIN AND SPROCKET(S
REMOVAL.............................77
INSPECTION..........................79
INSTALLATION.........................80
9 - 2 ENGINE - 3.7LKJ

ENGINE - 3.7L
DESCRIPTION
The 3.7 liter (226 CID) six-cylinder engine is an
90É single overhead camshaft engine. The cast iron
cylinder block is made up of two different compo-
nents; the first component is the cylinder bore and
upper block, the second component is the bedplate
that comprises the lower portion of the cylinder block
and houses the lower half of the crankshaft mainbearings. The cylinders are numbered from front to
rear with the left bank being numbered 1,3,and 5
and the right bank being numbered 2,4, and 6. The
firing order is 1±6±5±4±3±2. The engine serial num-
ber is located at the right front side of the engine
block
3.7 L ENGINE
KJENGINE - 3.7L 9 - 3

DIAGNOSIS AND TESTING - ENGINE DIAGNOSIS - LUBRICATION
CONDITION POSSIBLE CAUSES CORRECTION
OIL LEAKS 1. Gaskets and O-Rings. 1.
(a) Misaligned or damaged. (a) Replace as necessary.
(b) Loose fasteners, broken or
porous metal parts.(b) Tighten fasteners, Repair or
replace metal parts.
2. Crankshaft rear seal 2. Replace as necessary (Refer to 9
- ENGINE/ENGINE BLOCK/
CRANKSHAFT OIL SEAL - REAR -
REMOVAL).
3. Crankshaft seal flange.
Scratched, nicked or grooved.3. Polish or replace crankshaft.
4. Oil pan flange cracked. 4. Replace oil pan (Refer to 9 -
ENGINE/LUBRICATION/OIL PAN -
REMOVAL).
5. Timing chain cover seal
damaged.5. Re-seal timing cover.
6. Scratched or damaged vibration
damper hub.6. Polish or replace damper.
OIL PRESSURE DROP 1. Low oil level. 1. Check and correct oil level.
2. Faulty oil pressure sending unit. 2. Replace sending unit (Refer to 9
- ENGINE/LUBRICATION/OIL
PRESSURE SENSOR/SWITCH -
REMOVAL).
3. Low oil pressure. 3. Check oil pump and bearing
clearance.
4. Clogged oil filter. 4. Replace oil filter (Refer to 9 -
ENGINE/LUBRICATION/OIL FILTER
- REMOVAL).
5. Worn oil pump. 5. Replace oil pump (Refer to 9 -
ENGINE/LUBRICATION/OIL PUMP
- REMOVAL).
6. Thin or diluted oil. 6. Change oil and filter.
7. Excessive bearing clearance. 7. Replace as necessary.
8. Oil pump relief valve stuck. 8. Replace oil pump (Refer to 9 -
ENGINE/LUBRICATION/OIL PUMP
- REMOVAL).
9. Oil pump suction tube loose,
damaged or clogged.9. Replace as necessary.
KJENGINE - 3.7L 9 - 7
ENGINE - 3.7L (Continued)