2002 JEEP LIBERTY Battery circuit

ANTENNA MODULE C1 (BUILT-UP-EXPORT)-2WAY
CAV CIRCUIT FUNCTION
1 F85 16VT/WT FUSED IGNITION SWITCH OUTPUT (RUN--ACC)
2- -
ANTENNA MODULE C2 (BUILT-UP-EXPORT)-2WAY
CAV CIRCUIT FUNCTION
1 X30 BK RADIO ANTENNA CORE
2 X31 BK RADIO ANTENNA SHIELD
ASH RECEIVER LAMP-2WAY
CAV CIRCUIT FUNCTION
1 E2 20OR FUSED PANEL LAMPS DIMMER SWITCH SIGNAL
2 Z158 20BK/GY GROUND
BACK-UP LAMP SWITCH (M/T) - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 F15 18DB/WT FUSED IGNITION SWITCH OUTPUT (RUN)
2 L10 18BR/LG BACK-UP LAMP FEED
BATTERY TEMPERATURE SENSOR - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 K118 18PK/YL BATTERY TEMPERATURE SENSOR SIGNAL
2 K4 18BK/LB SENSOR GROUND
8Wa - 80 - 8 8W-80 CONNECTOR PIN-OUTSKJ

C107 - BLACK (FRONT END LIGHTING SIDE)
CAV CIRCUIT
6 L62 18BR/RD
7-
8 L39 18LB (FOG LAMPS)
9-
10 L63 18DG/RD
C108 (GAS) - GRAY (BATTERY SIDE)
CAV CIRCUIT
1 K52 18PK/BK
2 K20 18DG
3 K125 18WT/DB
4 T40 12BR
5 F1 18DB
6-
C108 (GAS) - GRAY (HEADLAMP AND DASH
SIDE)
CAV CIRCUIT
1 K52 18PK/BK
2 K20 18DG
3 K125 18WT/DB
4 T40 12BR
5 F1 18DB
6-
C110 (2.4L) - BLACK (ENGINE TO HEADLAMP
AND DASH SIDE)
CAV CIRCUIT
1 F142 18OR/DG
2 C3 18DB/BK
3 Z246 18BK/GY
4 K11 18WT/DB
5 K12 18TN
6 K13 18YL/WT
7 K14 18LB/BR
8 K44 18TN/YL
9 K4 18BK/LB
10 -
8Wa - 80 - 24 8W-80 CONNECTOR PIN-OUTSKJ

C112 (GAS) - BLACK (ENGINE SIDE)
CAV CIRCUIT
1 K42 18DB/LB (3.7L)
2 K4 18BK/LB (3.7L)
3 Z252 18BK/GY
4 K142 18GY/BK (3.7L)
5 K4 18BK/LB (3.7L)
6 Z252 18BK/GY
7-
8-
9-
10 A142 14DG/OR
C112 (GAS) - BLACK (HEADLAMP AND DASH
SIDE)
CAV CIRCUIT
1 K42 18DB/LB
2 K4 18BK/LB
3 Z252 18BK/GY
4 K142 18GY/BK
5 K4 18BK/LB
6 Z252 18BK/GY
7-
8-
9-
10 A142 14DG/OR
C113 (DIESEL) - LT.GRAY (GLOW PLUG SIDE)
CAV CIRCUIT
1 K154 10GY
2 K104 10RD/WT
C113 (DIESEL) - LT.GRAY (BATTERY SIDE)
CAV CIRCUIT
1 K154 10GY
2 K104 10RD/WT
8Wa - 80 - 26 8W-80 CONNECTOR PIN-OUTSKJ

C114 (DIESEL) - LT. GRAY (BATTERY SIDE)
CAV CIRCUIT
1 K154 10GY
2 K104 10RD/WT
C114 (DIESEL) - LT. GRAY (GLOW PLUG SIDE)
CAV CIRCUIT
1 K154 10GY
2 K104 10RD/WT
C201 - BLACK (INSTRUMENT PANEL SIDE)
CAV CIRCUIT
1 R57 20DG
2 R59 20LB
3 X75 18DG (EXCEPT BASE)
4 A99 14RD/VT
5 B12 18DG/OR
6 F81 12TN
7 V21 20DB/RD
8 V22 20BR/YL
9 R58 20GY
10 R60 20VT
11 K226 18DB/WT (LHD)
12 G74 20TN/WT
13 G71 18VT/YL
14 T6 20VT/WT
15 G9 20GY/BK
16 B1 18YL/DB (LHD)
17 K29 18WT/PK
18 L62 18BR/RD
19 M3 20PK/DB
20 K125 18WT/DB (LHD)
21 -
22 -
23 K4 18BK/LB (LHD)
24 G910 20VT/BR
25 G78 20TN/BK
26 P101 20OR/PK
27 G80 20YL/WT
28 B2 18YL (LHD)
29 Z9 16BK
30 L63 18DG/RD
31 K106 18WT/DG (LHD)
32 K107 18OR (LHD)
33 D25 18YL/VT/DB
34 G75 20TN
35 G72 18DG/OR (PREMIUM)
KJ8W-80 CONNECTOR PIN-OUTS8Wa-80-27

EGR SOLENOID (DIESEL)-2WAY
CAV CIRCUIT FUNCTION
1 A71 18DG/RD FUSED AUTO SHUT DOWN RELAY OUTPUT
2 K35 18GY/YL EGR SOLENOID CONTROL
ENGINE CONTROL MODULE C1 (DIESEL) - BLACK 81 WAY
CAV CIRCUIT FUNCTION
1 Z108 14BK/DG GROUND
2 Z108 14BK/DG GROUND
3 K20 18DG GENERATOR FIELD CONTROL
4 A142 14DG/OR AUTO SHUT DOWN RELAY OUTPUT
5 A142 14DG/OR AUTO SHUT DOWN RELAY OUTPUT
6- -
7 D25 20VT/YL PCI BUS
8 K944 20BK/LB CAMSHAFT POSITION SENSOR GROUND
9 K44 20TN/YL CAMSHAFT POSITION SENSOR SIGNAL
10 - -
11 K37 20DB/YL BOOST PRESSURE SENSOR SIGNAL
12 - -
13 K78 20GY FUEL PRESSURE SENSOR SIGNAL
14 - -
15 K81 20VT/TN ACCELERATOR PEDAL POSITION SENSOR SIGNAL
16 K80 20BK/VT FUEL PRESSURE SENSOR GROUND
17 - -
18 - -
19 F92 20YL/BR BATTERY SENSE (+)
20 Z109 20BK/DB BATTERY SENSE (-)
21 K4 20BK/LB SENSOR GROUND
22 F1 20DB FUSED IGNITION SWITCH OUTPUT (RUN-START)
23 K6 20VT/WT SENSOR REFERENCE VOLTAGE B
24 K3 20LB/BK CRANKSHAFT POSITION SENSOR SIGNAL 2
25 - -
26 - -
27 - -
28 - -
29 K77 20BR/WT TRANSFER CASE POSITION SENSOR INPUT
30 G60 20GY/YL ENGINE OIL PRESSURE SENSOR SIGNAL
31 G123 20DG/WT WATER IN FUEL SENSOR SIGNAL
32 K118 20PK/YL BATTERY TEMPERATURE SENSOR SIGNAL
33 - -
34 K255 20WT/DG ACCELERATOR PEDAL POSITION SENSOR GROUND
35 K852 20VT/WT ACCELERATOR PEDAL POSITION SENSOR 5 VOLT
SUPPLY
36 - -
37 - -
38 V37 20RD/LG SPEED CONTROL SWITCH SIGNAL
39 K226 20DB/WT FUEL LEVEL SENSOR SIGNAL
40 K2 20TN/BK ENGINE COOLANT TEMPERATURE SENSOR SIGNAL
41 K21 18BK/RD INTAKE AIR TEMPERATURE SENSOR SIGNAL
42 Y101 20BK/OR CRANKSHAFT POSITION SENSOR SHIELD
43 K24 20GY/BK CRANKSHAFT POSITION SENSOR SIGNAL 1
KJ8W-80 CONNECTOR PIN-OUTS8Wa-80-55

POWERTRAIN CONTROL MODULE-C2 (GAS) - WHITE 32 WAY
CAV CIRCUIT FUNCTION
13 - -
14 - -
15 K12 18TN FUEL INJECTOR NO. 2 DRIVER
16 K14 18LB/BR FUEL INJECTOR NO. 4 DRIVER
17 K173 18LG RADIATOR FAN RELAY CONTROL
18 - -
19 C18 18DB A/C PRESSURE SIGNAL
20 - -
21 - -
22 - -
23 G60 18GY/YL ENGINE OIL PRESSURE SENSOR SIGNAL
24 - -
25 - -
26 - -
27 - -
28 - -
29 - -
30 - -
31 K6 18VT/WT 5 VOLT SUPPLY
32 - -
POWERTRAIN CONTROL MODULE-C3 (GAS) - LT. GRAY 32 WAY
CAV CIRCUIT FUNCTION
1 C13 18DG A/C COMPRESSOR CLUTCH RELAY CONTROL
2- -
3 K51 18DB/YL AUTO SHUT DOWN RELAY CONTROL
4 V36 18TN/RD SPEED CONTROL VACUUM SOLENOID CONTROL
5 V35 18LG/RD SPEED CONTROL VENT SOLENOID CONTROL
6 K90 18TN (M/T) CLUTCH INTERLOCK RELAY CONTROL
7 K42 18DB/LB (3.7L) KNOCK SENSOR NO. 1 SIGNAL
7 K42 18DB/LB (2.4L) NOT USED
8 K99 18BR/OR OXYGEN SENSOR 1/1 HEATER CONTROL
9 K512 18RD/YL OXYGEN SENSOR DOWNSTEAM RELAY CONTROL
10 K106 18WT/DG LEAK DETECTION PUMP SOLENOID CONTROL
11 V32 18YL/RD SPEED CONTROL SUPPLY
12 F142 18OR/DG FUSED AUTO SHUT DOWN RELAY SENSE INPUT
13 T10 18YL/DG TORQUE MANAGEMENT REQUEST SENSE
14 K107 18OR LEAK DETECTION PUMP SWITCH SENSE
15 K118 18PK/YL BATTERY TEMPERATURE SENSOR SIGNAL
16 K299 18BR/WT (2.4L) OXYGEN SENSOR 1/2 HEATER CONTROL
16 K299 18BR/WT (3.7L) OXYGEN SENSOR 2/1 HEATER CONTROL
17 B22 18DG/YL VEHICLE SPEED OUTPUT
18 K142 18GY/BK (2.4L) NOT USED
18 K142 18GY/BK (3.7L) KNOCK SENSOR NO. 2 SIGNAL
19 K31 18BR FUEL PUMP RELAY CONTROL
20 K52 18PK/BK EVAP PURGE/SOLENOID CONTROL
21 - -
22 C21 18DB/OR A/C SWITCH SENSE
23 - -
24 K29 18WT/PK BRAKE LAMP SWITCH SENSE
25 K125 18WT/DB GENERATOR SOURCE
KJ8W-80 CONNECTOR PIN-OUTS8Wa-80-83

OIL PRESSURE SENSOR/
SWITCH
DESCRIPTION
The 3±wire, solid-state engine oil pressure sensor
(sending unit) is located in an engine oil pressure
gallery.
OPERATION
The oil pressure sensor uses three circuits. They
are:
²A 5±volt power supply from the Powertrain Con-
trol Module (PCM)
²A sensor ground through the PCM's sensor
return
²A signal to the PCM relating to engine oil pres-
sure
The oil pressure sensor has a 3±wire electrical
function very much like the Manifold Absolute Pres-
sure (MAP) sensor. Meaning different pressures
relate to different output voltages.
A 5±volt supply is sent to the sensor from the PCM
to power up the sensor. The sensor returns a voltage
signal back to the PCM relating to engine oil pres-
sure. This signal is then transferred (bussed) to the
instrument panel on either a CCD or PCI bus circuit
(depending on vehicle line) to operate the oil pressure
gauge and the check gauges lamp. Ground for the
sensor is provided by the PCM through a low-noise
sensor return.
REMOVAL
(1) Disconnect the negative cable from the battery.
(2) Raise vehicle on hoist.
(3) Remove front splash shield.
(4) Disconnect oil pressure sender wire (Fig. 78).
(5) Remove the pressure sender (Fig. 78).
INSTALLATION
(1) Install oil pressure sender.
(2) Connect oil pressure sender wire.
(3) Install front splash shield.
(4) Lower vehicle.
(5) Connect the negative battery cable.
OIL PUMP
REMOVAL
(1) Remove the oil pan and pick-up tube (Refer to
9 - ENGINE/LUBRICATION/OIL PAN - REMOVAL).
(2) Remove the timing chain cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - REMOVAL).
(3) Remove the timing chains and tensioners
(Refer to 9 - ENGINE/VALVE TIMING/TIMING
BELT/CHAIN AND SPROCKETS - REMOVAL).
(4) Remove the four bolts, primary timing chain
tensioner and the oil pump.
DISASSEMBLY
(1) Remove oil pump cover screws and lift off cover
plate.
(2) Remove pump inner and outer rotors.
NOTE: Once the oil pressure relief valve, cup plug,
and pin are removed, the pump assembly must be
replaced.
(3) If it is necessary to remove the pressure relief
valve, drive the roll pin from pump housing and
remove cup plug, spring and valve.
Fig. 78 Oil Pressure Sending Unit
1 - BELT
2 - OIL PRESSURE SENSOR
3 - OIL FILTER
4 - ELEC. CONNECTOR
KJENGINE - 3.7L 9 - 65

instrument panel on either a CCD or PCI bus circuit
(depending on vehicle line) to operate the oil pressure
gauge and the check gauges lamp. Ground for the
sensor is provided by the PCM through a low-noise
sensor return.
OIL PUMP
REMOVAL
(1) Disconnect negative cable from battery.
(2) Remove timing belt. (Refer to 9 - ENGINE/
VALVE TIMING/TIMING BELT/CHAIN AND
SPROCKETS - REMOVAL)
(3) Remove timing belt rear cover. (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - REMOVAL)
(4) Remove oil pan. (Refer to 9 - ENGINE/LUBRI-
CATION/OIL PAN - REMOVAL)
(5) Remove crankshaft sprocket using Special
Tools 6793 and C-4685-C2 (Fig. 81).
(6) Remove crankshaft key (Fig. 82).
(7) Remove oil pick-up tube.
(8) Remove oil pump (Fig. 83) and front crankshaft
seal.
DISASSEMBLY
(1) To remove the relief valve, proceed as follows:
(a) Remove the threaded plug and gasket from
the oil pump.
(b) Remove spring and relief valve.
(2) Remove oil pump cover fasteners, and lift off
cover.
(3) Remove pump rotors.
(4) Wash all parts in a suitable solvent and
inspect carefully for damage or wear.
CLEANING
(1) Clean all parts thoroughly in a suitable sol-
vent.
Fig. 81 Crankshaft Sprocket - Removal
1 - SPECIAL TOOL 6793
2 - SPECIAL TOOL C-4685±C2
3 - CRANKSHAFT SPROCKET
Fig. 82 Crankshaft Key
1 - CRANKSHAFT KEY
Fig. 83 2.4L OIL PUMP
1 - BOLTS
2 - BOLTS
KJENGINE9s-49
OIL PRESSURE SENSOR/SWITCH (Continued)