Fuse JEEP LIBERTY 2002 KJ / 1.G Workshop Manual

RIGHT POSITION LAMP (BUILT-UP-EXPORT) - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 L78 18DG/YL FUSED PARK LAMP RELAY OUTPUT
2 Z142 18BK/WT GROUND
RIGHT POWER MIRROR (EXCEPT BASE) - WHITE 8 WAY
CAV CIRCUIT FUNCTION
1 P72 20YL/BK RIGHT MIRROR UP DRIVER
2 P76 20OR/YL MIRROR COMMON DRIVER
3 P74 20DB RIGHT MIRROR LEFT DRIVER
4- -
5 C16 20LB/YL FUSED DEFOGGER RELAY OUTPUT
6 Z351 20BK/LG GROUND
7 P99 20GY (WITH FOLD) FOLDING MIRROR FEED
8 P110 20YL (WITH FOLD) FOLDING MIRROR RETURN
RIGHT POWER SEAT MOTORS (MIDLINE/HIGHLINE) - BLACK 6 WAY
CAV CIRCUIT FUNCTION
1 P10 14YL/WT PASSENGER SEAT REAR UP DRIVER
2 P12 14RD/WT PASSENGER SEAT REAR DOWN DRIVER
3 P18 14YL/LG PASSENGER SEAT FRONT UP DRIVER
4 P20 14RD/LG PASSENGER SEAT FRONT DOWN DRIVER
5 P16 14RD/YL PASSENGER SEAT HORIZONTAL REARWARD DRIVER
6 P14 14YL/LB PASSENGER SEAT HORIZONTAL FORWARD DRIVER
RIGHT POWER SEAT SWITCH (MIDLINE/HIGHLINE) - GREEN 10 WAY
CAV CIRCUIT FUNCTION
1 Z238 14BK/WT GROUND
2- -
3 P14 14YL/LB PASSENGER SEAT HORIZONTAL FORWARD DRIVER
4- -
5 F37 14RD/LB FUSED B(+)
6 P16 14RD/YL PASSENGER SEAT HORIZONTAL REARWARD DRIVER
7 P10 14YL/WT PASSENGER SEAT REAR UP DRIVER
8 P18 14YL/LG PASSENGER SEAT FRONT UP DRIVER
9 P20 14RD/LG PASSENGER SEAT FRONT DOWN DRIVER
10 P12 14RD/WT PASSENGER SEAT REAR DOWN DRIVER
KJ8W-80 CONNECTOR PIN-OUTS8Wa-80-91

RIGHT SIDE IMPACT AIRBAG CONTROL MODULE (RSIACM) - YELLOW 8 WAY
CAV CIRCUIT FUNCTION
1 F14 18LG/YL FUSED IGNITION SWITCH OUTPUT (RUN-START)
2- -
3 R76 18YL/DB RIGHT CURTAIN SQUIB LINE 2
4 R74 18YL/BR RIGHT CURTAIN SQUIB LINE 1
5 Z100 18BK/YL GROUND
6- -
7- -
8 D25 18YL/VT PCI BUS
RIGHT SIDE MARKER LAMP (EXCEPT BUILT-UP-EXPORT) - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 L78 18DG/YL FUSED PARK LAMP RELAY OUTPUT
2 L62 18BR/RD RIGHT TURN SIGNAL
RIGHT SIDE REPEATER LAMP (BUILT-UP-EXPORT) - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 L62 18BR/RD RIGHT TURN SIGNAL
2 Z142 18BK/WT GROUND
RIGHT SPEED CONTROL SWITCH (EXCEPT BASE) - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1- -
2 K4 20BK/LB SENSOR GROUND
3 V37 20RD/LG SPEED CONTROL SWITCH SIGNAL
4- -
RIGHT TAIL/STOP LAMP - BLACK 6 WAY
CAV CIRCUIT FUNCTION
1 L38 18BR/WT (BUILT-UP-EXPORT) REAR FOG LAMP RELAY OUTPUT
2 L78 18DG/YL FUSED PARK LAMP RELAY OUTPUT
3 L50 18WT/TN BRAKE LAMP SWITCH OUTPUT
4 L10 18BR/LG BACK-UP LAMP FEED
5 Z151 18BK/WT GROUND
6 L62 18BR/RD RIGHT TURN SIGNAL
KJ8W-80 CONNECTOR PIN-OUTS8Wa-80-93

RIGHT VISOR/VANITY LAMP (EXCEPT BASE) - WHITE 2 WAY
CAV CIRCUIT FUNCTION
1 M1 20PK FUSED B(+)
2 M20 20BR COURTESY LAMP LOAD SHED
SENTRY KEY IMMOBILIZER MODULE (EXCEPT BASE) - BLACK 6 WAY
CAV CIRCUIT FUNCTION
1 F33 20PK/RD FUSED B(+)
2 Z11 20BK/WT GROUND
3 F1 20DB FUSED IGNITION SWITCH OUTPUT (RUN-START)
4 Z110 20BK/TN GROUND
5 D25 20YL/VT/BK PCI BUS
6- -
SHIFTER ASSEMBLY - WHITE 6 WAY
CAV CIRCUIT FUNCTION
1 E2 20OR FUSED PANEL LAMPS DIMMER SWITCH SIGNAL
2 Z21 20BK/LG GROUND
3 T6 20VT/WT OVERDRIVE OFF SWITCH SENSE
4 Z21 20BK/LG GROUND
5 F22 18DB/PK FUSED IGNITION SWITCH OUTPUT (RUN)
6 K29 20WT/PK BRAKE SWITCH SENSE
SIREN (BUILT-UP-EXPORT)-3WAY
CAV CIRCUIT FUNCTION
1 Z142 18BK/WT GROUND
2 X75 18DG SIREN SIGNAL CONTROL
3 M1 18PK FUSED B(+)
SPEED CONTROL SERVO - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 V36 18TN/RD SPEED CONTROL VACUUM SOLENOID CONTROL
2 V35 18LG/RD SPEED CONTROL VENT SOLENOID CONTROL
3 V30 18DB/RD SPEED CONTROL BRAKE SWITCH OUTPUT
4 Z212 18BK/OR GROUND
8Wa - 80 - 94 8W-80 CONNECTOR PIN-OUTSKJ

SUNROOF MOTOR - LT. GRAY 6 WAY
CAV CIRCUIT FUNCTION
1 F85 16VT/WT FUSED IGNITION SWITCH OUTPUT (RUN-ACC)
2 Z111 16BK GROUND
3 Q44 20BR SUNROOF SWITCH GROUND
4 Q43 20VT SUNROOF VENT
5 Q42 20LB SUNROOF CLOSE
6 Q41 20WT SUNROOF OPEN
SUNROOF SWITCH - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 Q41 20WT SUNROOF OPEN
2 Q42 20LB SUNROOF CLOSE
3 Q43 20VT SUNROOF VENT
4 Q44 20BR SUNROOF SWITCH GROUND
TAILGATE CYLINDER LOCK SWITCH - LT. GRAY 2 WAY
CAV CIRCUIT FUNCTION
1 G910 20VT/BR TAILGATE SWITCH GROUND
2 G71 18VT/YL TAILGATE CYLINDER LOCK SWITCH MUX
TAILGATE FLIP-UP AJAR SWITCH - GRAY 2 WAY
CAV CIRCUIT FUNCTION
1 G80 20YL/WT FLIP-UP GLASS AJAR SWITCH SENSE
2 Z235 18BK GROUND
TAILGATE LOCK MOTOR/AJAR SWITCH - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 P31 16PK/WT TAILGATE UNLOCK DRIVER
2 P30 16OR/WT TAILGATE LOCK DRIVER
3 G78 20TN/BK TAILGATE AJAR SWITCH SENSE
4 G910 20VT/BR TAILGATE SWITCH GROUND
KJ8W-80 CONNECTOR PIN-OUTS8Wa-80-95

THROTTLE POSITION SENSOR - WHITE/BLUE 3 WAY
CAV CIRCUIT FUNCTION
1 K7 18OR 5 VOLT SUPPLY
2 K4 18BK/LB SENSOR GROUND
3 K22 18OR/DB THROTTLE POSITION SENSOR SIGNAL
TRAILER TOW BRAKE LAMP RELAY-5WAY
CAV CIRCUIT FUNCTION
30 A6 16RD/BK FUSED B(+)
85 Z149 18BK/LB GROUND
86 L50 18WT/TN BRAKE LAMP SWITCH OUTPUT
87 L95 16DG/YL TRAILER TOW BRAKE LAMP RELAY OUTPUT
87A L76 16BK/OR TRAILER TOW BRAKE LAMP RELAY OUTPUT
87 L95 16DG/YL TRAILER TOW BRAKE LAMP RELAY OUTPUT
TRAILER TOW CIRCUIT BREAKER-2WAY
CAV CIRCUIT FUNCTION
1 A99 14RD/VT FUSED B(+)
2 F71 14RD FUSED B(+)
TRAILER TOW CONNECTOR - BLACK 10 WAY
CAV CIRCUIT FUNCTION
1- -
2 L74 16PK/BK RIGHT TURN SIGNAL
3 L10 18BR/LG BACK-UP LAMP FEED
4 F73 14YL TRAILER TOW RELAY OUTPUT
5 L78 18DG/YL FUSED PARK LAMP RELAY OUTPUT
6- -
7 B40 14LB TRAILER TOW BRAKE B(+)
8 Z149 16BK/LB GROUND
9 Z149 16BK/LB GROUND
10 L73 16PK/WT LEFT TURN SIGNAL
8Wa - 80 - 96 8W-80 CONNECTOR PIN-OUTSKJ

TRAILER TOW LEFT TURN RELAY-5WAY
CAV CIRCUIT FUNCTION
30 L73 16PK/WT LEFT TURN SIGNAL
85 Z149 18BK/LB GROUND
86 L63 18DG/RD LEFT TURN SIGNAL
87 L76 16BK/OR TRAILER TOW BRAKE LAMP RELAY OUTPUT
87A L95 16DG/YL TRAILER TOW BRAKE LAMP RELAY OUTPUT
87 L76 16BK/OR TRAILER TOW BRAKE LAMP RELAY OUTPUT
TRAILER TOW RELAY-5WAY
CAV CIRCUIT FUNCTION
30 F71 14RD FUSED B(+)
85 Z149 18BK/LB GROUND
86 V23 20BR/PK FUSED IGNITION SWITCH OUTPUT (RUN)
87A - -
87 F73 14YL TRAILER TOW RELAY OUTPUT
TRAILER TOW RIGHT TURN RELAY-5WAY
CAV CIRCUIT FUNCTION
30 L74 16PK/BK RIGHT TURN SIGNAL
85 Z149 18BK/LB GROUND
86 L62 18BR/RD RIGHT TURN SIGNAL
87A L95 16DG/YL TRAILER TOW BRAKE LAMP RELAY OUTPUT
87 L76 16BK/OR TRAILER TOW BRAKE LAMP RELAY OUTPUT
TRANSFER CASE POSITION SENSOR - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 K77 20BR/WT (DIESEL) TRANSFER CASE POSITION SENSOR INPUT
1 K77 18BR/WT (GAS) TRANSFER CASE POSITION SENSOR INPUT
2 K4 18BK/LB SENSOR GROUND
KJ8W-80 CONNECTOR PIN-OUTS8Wa-80-97

TRANSMISSION CONTROL MODULE (3.7L) - BLACK 60 WAY
CAV CIRCUIT FUNCTION
1 T1 18LG/BK TRS T1 SENSE
2 T4 18PK/OR TRS T2 SENSE
3 T3 18VT TRS T3 SENSE
4- -
5- -
6 K24 18GY/BK CRANKSHAFT POSITION SENSOR SIGNAL
7 D21 18PK SCI TRANSMIT
8 F45 18YL/BR FUSED IGNITION SWITCH OUTPUT (START)
9 T9 18OR/BK OVERDRIVE PRESSURE SWITCH SENSE
10 T10 18YL/DG TORQUE MANAGEMENT REQUEST SENSE
11 F1 18DB FUSED IGNITION SWITCH OUTPUT (RUN-START)
12 K22 18OR/DB THROTTLE POSITION SENSOR SIGNAL
13 T13 18DB/BK SPEED SENSOR GROUND
14 T14 18LG/WT OUTPUT SPEED SENSOR SIGNAL
15 K30 18PK TRANSMISSION CONTROL RELAY CONTROL
16 T16 14RD TRANSMISSION CONTROL RELAY OUTPUT
17 T16 14RD TRANSMISSION CONTROL RELAY OUTPUT
18 T591 18YL/DB PRESSURE CONTROL SOLENOID CONTROL
19 T119 18WT/DB 2C SOLENOID CONTROL
20 T20 18LB LOW/REVERSE SOLENOID CONTROL
21 - -
22 - -
23 - -
24 - -
25 - -
26 - -
27 - -
28 - -
29 T29 18GY UNDERDRIVE PRESSURE SWITCH SENSE
30 T38 18VT/TN LINE PRESSURE SENSOR SIGNAL
31 - -
32 - -
33 - -
34 - -
35 - -
36 T16 14RD TRANSMISSION CONTROL RELAY OUTPUT
37 Z113 14BK/YL GROUND
38 T39 18GY/LB 5 VOLT SUPPLY
39 Z113 14BK/YL GROUND
40 T140 18VT/LG MS SOLENOID CONTROL
41 T411 18WT/PK TRS T41 SENSE
42 T42 18VT/WT TRS T42 SENSE
43 D25 18VT/YL PCI BUS
44 - -
45 - -
46 D20 18LG SCI RECEIVE
47 T147 18LB 2C PRESSURE SWITCH SENSE
48 T48 18DB 4C PRESSURE SWITCH SENSE
49 T6 18OR/WT OVERDRIVE OFF SWITCH SENSE
50 T50 18DG LOW/REVERSE PRESSURE SWITCH SENSE
51 K4 18BK/LB SENSOR GROUND
52 T52 18RD/BK INPUT SPEED SENSOR SIGNAL
53 Z112 14BK GROUND
8Wa - 80 - 98 8W-80 CONNECTOR PIN-OUTSKJ

TRANSMISSION CONTROL MODULE (3.7L) - BLACK 60 WAY
CAV CIRCUIT FUNCTION
54 T54 18VT TRANSMISSION TEMPERATURE SENSOR SIGNAL
55 T59 18PK UNDERDRIVE SOLENOID CONTROL
56 A30 14RD/WT FUSED B(+)
57 Z113 14BK/YL GROUND
58 - -
59 T159 18DG/WT 4C SOLENOID CONTROL
60 T60 18BR OVERDRIVE SOLENOID CONTROL
TRANSMISSION SOLENOID/TRS ASSEMBLY (3.7L) - GRAY 23 WAY
CAV CIRCUIT FUNCTION
1 F15 18DB/WT FUSED IGNITION SWITCH OUTPUT (RUN)
2 T20 18LB LOW/REVERSE SOLENOID CONTROL
3 T41 18BK/WT PARK/NEUTRAL POSITION SWITCH SENSE
4 T411 18WT/PK TRS T41 SENSE
5 T42 18VT/WT TRS T42 SENSE
6 L10 18BR/LG BACK-UP LAMP FEED
7 T60 18BR OVERDRIVE SOLENOID CONTROL
8 T3 18VT TRS T3 SENSE
9 T1 18LG/BK TRS T1 SENSE
10 T16 14RD TRANSMISSION CONTROL RELAY OUTPUT
11 T48 18DB 4C PRESSURE SWITCH SENSE
12 T591 18YL/DB PRESSURE CONTROL SOLENOID CONTROL
13 T4 18PK/OR TRS T2 SENSE
14 T50 18DG LOW/REVERSE PRESSURE SWITCH SENSE
15 T147 18LB 2C PRESSURE SWITCH SENSE
16 T9 18OR/BK OVERDRIVE PRESSURE SWITCH SENSE
17 T59 18PK UNDERDRIVE SOLENOID CONTROL
18 T29 18GY UNDERDRIVE PRESSURE SWITCH SENSE
19 T159 18DG/WT 4C SOLENOID CONTROL
20 T119 18WT/DB 2C SOLENOID CONTROL
21 T140 18VT/LG MS SOLENOID CONTROL
22 T13 18DB/BK SPEED SENSOR GROUND
23 T54 18VT TRANSMISSION TEMPERATURE SENSOR SIGNAL
WASHER FLUID LEVEL SWITCH - LT. GRAY 2 WAY
CAV CIRCUIT FUNCTION
1 G29 18BK/TN LOW WASHER FLUID SENSE
2 Z141 18BK GROUND
KJ8W-80 CONNECTOR PIN-OUTS8Wa-80-99

(1) Remove protective cap at fuel rail test port.
Connect the 0±414 kPa (0-60 psi) fuel pressure gauge
(from gauge set 5069) to test port pressure fitting on
fuel rail (Fig. 20).The DRBtIII Scan Tool along
with the PEP module, the 500 psi pressure
transducer, and the transducer-to-test port
adapter may also be used in place of the fuel
pressure gauge.
(2) Start and warm engine and note pressure
gauge reading. Fuel pressure should be 339 kPa   34
kPa (49.2 psi   5 psi) at idle.
(3) If engine runs, but pressure is below 44.2 psi,
check for a kinked fuel supply line somewhere
between fuel rail and fuel pump module. If line is not
kinked, but specifications for either the Fuel Pump
Capacity, Fuel Pump Amperage or Fuel Pressure
Leak Down Tests were not met, replace lower section
of fuel pump module. Refer to Fuel Pump Module
Removal/Installation.
(4) If operating pressure is above 54.2 psi, electric
fuel pump is OK, but fuel pressure regulator is defec-
tive. Replace lower section of fuel pump module.
Refer to Fuel Pump Module Removal/Installation.
(5) Install protective cap to fuel rail test port.
DIAGNOSIS AND TESTING - FUEL PUMP
AMPERAGE TEST
This amperage (current draw) test is to be done in
conjunction with the Fuel Pump Pressure Test, Fuel
Pump Capacity Test and Fuel Pressure Leak Down
Test. Before performing the amperage test, be sure
the temperature of the fuel tank is above 50É F (10É
C).The DRBtScan Tool along with the DRB Low Cur-
rent Shunt (LCS) adapter (Fig. 21) and its test leads
will be used to check fuel pump amperage specifica-
tions.
(1) Be sure fuel tank contains fuel before starting
test. If tank is empty or near empty, amperage read-
ings will be incorrect.
(2) Obtain LCS adapter.
(3) Plug cable from LCS adapter into DRB scan
tool at SET 1 receptacle.
(4) Plug DRB into vehicle 16±way connector (data
link connector).
(5) Connect (-) and (+) test cable leads into LCS
adapter receptacles. Use10 amp (10A +)receptacle
and common (-) receptacles.
(6) Gain access to MAIN MENU on DRB screen.
(7) Press DVOM button on DRB.
(8) Using left/right arrow keys, highlight CHAN-
NEL 1 function on DRB screen.
(9) Press ENTER three times.
(10) Using up/down arrow keys, highlight RANGE
on DRB screen (screen will default to 2 amp scale).
(11) Press ENTER to change 2 amp scale to 10
amp scale.This step must be done to prevent
damage to DRB scan tool or LCS adapter
(blown fuse).
(12) Remove cover from Power Distribution Center
(PDC).
(13) Remove fuel pump relay from PDC. Refer to
label on PDC cover for relay location.
Fig. 20 FUEL PRESSURE TEST GAUGE (TYPICAL
GAUGE INSTALLATION AT TEST PORT)
1 - SERVICE (TEST) PORT
2 - FUEL PRESSURE TEST GAUGE
3 - FUEL RAIL
Fig. 21 LOW CURRENT SHUNT
1 - LOW CURRENT SHUNT ADAPTER
2 - PLUG TO DRB
3 - TEST LEAD RECEPTACLES
14 - 16 FUEL DELIVERYKJ
FUEL PUMP (Continued)

Pressure Diagnosis
Condition Possible Causes Correction
Rapid compressor clutch
cycling (ten or more cycles
per minute).1. Low refrigerant system
charge.1. See Plumbing/Diagnosis and Testing -
Refrigerant System Leaks in this group. Test the
refrigerant system for leaks. Repair, evacuate and
charge the refrigerant system, if required.
Equal pressures, but the
compressor clutch does not
engage.1. No refrigerant in the
refrigerant system.1. See Plumbing/Diagnosis and Testing -
Refrigerant System Leaks in this group. Test the
refrigerant system for leaks. Repair, evacuate and
charge the refrigerant system, if required.
2. Faulty fuse. 2. Check the fuses in the Power Distribution
Center and the junction block. Repair the shorted
circuit or component and replace the fuses, if
required.
3. Faulty a/c compressor
clutch coil.3. See A/C Compressor/Diagnosis and Testing -
Compressor Clutch Coil in this group. Test the
compressor clutch coil and replace, if required.
4. Faulty a/c compressor
clutch relay.4. See A/C Compressor Clutch Relay/Diagnosis
and Testing - Compressor Clutch Relay in this
group. Test the compressor clutch relay and relay
circuits. Repair the circuits or replace the relay, if
required.
5. Improperly installed or
faulty a/c low pressure
switch.5. See A/C Low Pressure Switch/Diagnosis and
Testing in this group. Test the a/c low pressure
switch and tighten or replace, if required.
6. Faulty a/c high pressure
switch.6. See A/C High Pressure Switch/Diagnosis and
Testing in this group. Test the a/c high pressure
switch and replace, if required.
7. Faulty Powertrain Control
Module (PCM).7. (Refer to Appropriate Diagnostic Information).
Test the PCM and replace, if required.
Normal pressures, but A/C
Performance Test air
temperatures at center panel
outlet are too high.1. Excessive refrigerant oil in
system.1. See Refrigerant Oil/Standard Procedure -
Refrigerant Oil Level in this group. Recover the
refrigerant from the refrigerant system and
inspect the refrigerant oil content. Restore the
refrigerant oil to the proper level, if required.
2. Blend door inoperative or
sealing improperly.2. See Blend Door in this group. Inspect the
blend door for proper operation and sealing and
correct, if required.
3. Blend door actuator faulty
or inoperative.3. Perform blend door actuator diagnosis, replace
if faulty.
The low side pressure is
normal or slightly low, and
the high side pressure is too
low.1. Low refrigerant system
charge.1. See Plumbing/Diagnosis and Testing -
Refrigerant System Leaks in this group. Test the
refrigerant system for leaks. Repair, evacuate and
charge the refrigerant system, if required.
2. Refrigerant flow through
the accumulator is restricted.2. See Accumulator in this group. Replace the
restricted accumulator, if required.
3. Refrigerant flow through
the evaporator coil is
restricted.3. See A/C Evaporator in this group. Replace the
restricted evaporator coil, if required.
24 - 4 HEATING & AIR CONDITIONINGKJ
HEATING & AIR CONDITIONING (Continued)