1995 JEEP YJ heating system diagrams

EXTENDED IDLE SWITCH TEST
OPTIONAL POLICE PACKAGE ONLY
OPERATION
The extended idle switch is used to raise the en-
gine idle speed to approximately 1000 rpm when the
shifter is in either the Park or Neutral position. A
rocker-type 2-wire switch (extended idle switch) is
mounted to the instrument panel.This switch is
available only with 4.0L engine when supplied
with the optional police package.
TESTING
The extended idle switch will control a ground cir-
cuit going to the powertrain control module (PCM).
When a ground signal (through this switch) has been
received at pin number 10 in the PCM, engine idle
speed will increase.
Bring the engine to normal operating temperature
and turn the extended idle switch to the ON position.
Engine speed should now increase to approximately
1000 rpm when the shifter is in either the Park or
Neutral position. If engine speed does not increase,
apply a good ground to pin number 10 at the PCM
using a small paper clip. Be careful not to damage
the wiring with the paper clip. If the engine speed
now increases, it can be assumed that the PCM is
functioning correctly. Check the instrument panel
mounted switch for a closed ground circuit when in
the ON position. If the engine speed will not increase
after applying a ground to pin number 10, replace
the PCM. Refer to Group 8W, Wiring Diagrams for
circuit and wiring information.
THROTTLE POSITION SENSOR (TPS) TEST
To perform a complete test of the sensor and its cir-
cuitry, refer to DRB scan tool and appropriate Pow-
ertrain Diagnostics Procedures manual. To test the
sensor only, refer to the following:
The throttle position sensor (TPS) can be tested
with a digital voltmeter. The center terminal of the
TPS is the output terminal (Figs. 38 or 39).
With the ignition key in the ON position, back-
probe the TPS connector. Check the TPS output volt-
age at the center terminal wire of the connector.
Check this at idle (throttle plate closed) and at wide
open throttle (WOT). At idle, TPS output voltage
should must be greater than 200 millivolts. At wide
open throttle, TPS output voltage must be less than
4.8 volts. The output voltage should increase gradu-
ally as the throttle plate is slowly opened from idle to
WOT.
TORQUE CONVERTER CLUTCH RELAY TEST
To test the relay only, refer to RelaysÐOperation/
Testing in this section of the group. To test the
torque converter clutch circuit and related compo-nents, refer to the appropriate Powertrain Diagnostic
Procedures manual for operation of the DRB scan
tool.
VEHICLE SPEED SENSOR TEST
To perform a complete test of the sensor and its cir-
cuitry, refer to DRB scan tool and appropriate Pow-
ertrain Diagnostics Procedures manual.
OXYGEN SENSOR (O2S) HEATING ELEMENT TEST
To perform a complete test of the O2S sensor (Fig.
40) and its circuitry, refer to DRB scan tool and ap-
propriate Powertrain Diagnostics Procedures manual.
To test the sensor only, refer to the following:
The oxygen sensor heating element can be tested
with an ohmmeter as follows:
With the sensor at room temperature 25 degrees C
(77 degrees F), disconnect the O2S sensor connector.
Connect the ohmmeter test leads across the white
wire terminals of the sensor connector. Resistance
should be between 5 and 7 ohms. Replace the sensor
if the ohmmeter displays an infinity (open) reading.
Fig. 38 TPS TestingÐ2.5L Engine
Fig. 39 TPS TestingÐ4.0L Engine
14 - 48 FUEL SYSTEM GENERAL DIAGNOSISJ

HEATING AND AIR CONDITIONING TEST PROCEDURES
INDEX
page page
A/C Compressor Clutch..................... 15
A/C Compressor Clutch Relay................ 15
A/C Compressor Clutch Relay................ 16
Air Conditioning ControlsÐXJ Vehicles......... 15
Air Conditioning ControlsÐYJ Vehicles......... 16
Blower Motor............................ 17
Blower Motor Switch....................... 16Compressor Clutch........................ 16
Fin Sensing Cycling Clutch Switch............. 15
Heater Diagnosis......................... 17
Low-Pressure High-Pressure Cut-Off Switch..... 15
Low-Pressure High-Pressure Cut-Off Switch..... 16
Thermostatic Control....................... 16
AIR CONDITIONING CONTROLSÐXJ VEHICLES
The A/C Compressor Clutch is controlled by several
components: the Pressure Cut-Off Switch, Cycling
Clutch Switch, Clutch Relay and Powertrain Control
Module (PCM).
Powertrain Control Module may delay A/C clutch
engagement up to 30 seconds.
Refer to Group 8W Wiring Diagrams for wiring and
terminals. Use volt ohmmeter to test switches.
A/C COMPRESSOR CLUTCH
The clutch assembly consists of a stationary elec-
tromagnetic coil, hub bearing pulley assembly, and
clutch plate. When the coil is energized the plate is
magnetically engaged with the pulley and turns the
compressor shaft.
A/C COMPRESSOR CLUTCH TEST
(1) Unplug clutch coil connector.
(2) Connect a jumper wire from the battery posi-
tive post to the clutch coil terminal. The clutch
should engage, if not leave jumper wire connected
and go to next step.
(3) Connect a jumper wire from clutch coil frame to
chassis ground. The clutch should engage if not re-
pair clutch coil ground or replace coil.
A/C COMPRESSOR CLUTCH RELAY
The A/C compressor clutch relay controls the 12-
volt source to the A/C clutch. The relay is activated
when the PCM receives a A/C request signal from the
fin-sensed cycling clutch switch. The PCM then sends
a ground signal to the relay. The relay is activated
and sends 12-volts to the clutch coil which energizes
the clutch. The relay is located in the power distribu-
tion center.
COMPRESSOR CLUTCH RELAY TEST
For test procedure refer to Powertrain Diagnostic
Service Manual for A/C clutch relay circuit test.
LOW-PRESSURE HIGH-PRESSURE CUT-OFF
SWITCH
The pressure cut-off switch is located on the filter
drier and is wired in series with compressor clutch.
The switch interrupts the power to the compressor
clutch circuit when the pressure drops to 193 kPa (28
psi) or increases above 3100 to 3375 kPa (450 to 490
psi).
PRESSURE CUT-OFF SWITCH TEST
(1) Verify system has correct refrigerant charge.
(2) Turn ignition switch to RUN, A/C blower switch
to ON and control set to MAX.
(3) Unplug pressure cut-off switch and test feed
circuit from select switch. It should be battery volt-
age if not, repair open to select switch.
(4) Test for continuity between the switch termi-
nals. If continuity is not present recover refrigerant
from the system. Replace switch, evacuate and re-
charge system.
FIN SENSING CYCLING CLUTCH SWITCH
The switch is attached to the evaporator coil with
the temperature sensing probe inserted into the coil
fins. This switch prevents condensate water on the
evaporator coil from freezing. It does this by sending
signals to the PCM to cycling the compressor clutch
on and off.
FIN-SENSED CYCLING CLUTCH SWITCH TEST
Test area ambient temperature should be around
21ÉC (70ÉF) for test.
(1) Verify system has correct refrigerant charge.
(2) Start Engine and turn on A/C.
(3) If the compressor clutch cycles ON and OFF 2
to 3 times per minute the cycling clutch switch is
normal. The ambient temperature should be between
20ÉC-30ÉC (68ÉF-90ÉF). Above 32ÉC (90ÉF) the com-
pressor clutch may stay engaged (non cycling) due to
the high heat load, this condition is normal. If the
compressor clutch fails to engage go to next step.
(4) Disconnect wiring harness connector from
switch. With a volt meter test feed circuit from cut-
JHEATING AND AIR CONDITIONING 24 - 15

off switch for battery voltage. If no voltage is present
test pressure cut-off switch. If voltage is present go
to next step.
(5) With ohmmeter test harness connector ground
circuit for continuity to ground. If circuit is open, (no
continuity) repair ground circuit. If circuit test OK
and clutch does not engage refer to Powertrain Diag-
nostic Service Manual for A/C clutch circuit test.
AIR CONDITIONING CONTROLSÐYJ VEHICLES
The air conditioning circuit consists of 3 segments;
battery supply, blower motor and compressor clutch.
The 3 segments have a common connection point at
the blower switch.
The power supply circuit extends from the HTR/
FAN fuse to the blower switch. From the blower
switch, battery feed is routed to the blower motor
and compressor clutch circuit.
Refer to Group 8W Wiring Diagrams for wiring
schematic and terminals. Use volt ohmmeter to test
switches.
COMPRESSOR CLUTCH
The clutch assembly consists of a stationary elec-
tromagnetic coil, hub bearing pulley assembly, and
clutch plate. When the coil is energized the plate is
magnetically engaged with the pulley and turns the
compressor shaft.
COMPRESSOR CLUTCH TEST
(1) Unplug clutch coil connector.
(2) Connect jumper wire from battery positive post
to clutch coil connector. The clutch should engage, if
not leave jumper wire connected and go to next step.
(3) Connect jumper wire from clutch coil frame to
chassis ground. The clutch should engage, if not re-
pair clutch coil ground or replace coil.
A/C COMPRESSOR CLUTCH RELAY
The A/C compressor clutch relay controls the 12-
volt source to the A/C clutch. The relay is activated
when the PCM receives a A/C request signal. The
PCM then sends a ground signal to the relay. The re-
lay is activated and sends 12-volts to the clutch coil
which energizes the clutch. The relay is located in
the power distribution center.
COMPRESSOR CLUTCH RELAY TEST
For test procedure refer to Powertrain Diagnostic
Service Manual for A/C clutch relay circuit test.
LOW-PRESSURE HIGH-PRESSURE CUT-OFF
SWITCH
The pressure cut-off switch is located on the filter
drier and is wired in series with compressor clutch.
The switch interrupts the power to the compressorclutch circuit when the pressure drops to 193 kPa (28
psi) or increases above 3100 to 3375 kPa (450 to 490
psi).
PRESSURE CUT-OFF SWITCH TEST
(1) Turn ignition switch to RUN, A/C blower switch
to ON and control set to MAX.
(2) Unplug pressure cut-off switch connector and
test feed circuit from the thermostatic, should be bat-
tery voltage. If not, proceed to thermostatic control
tests.
(3) Test for continuity between the switch termi-
nals. If continuity is not present recover refrigerant
system, replace switch, evacuate and recharge sys-
tem.
THERMOSTATIC CONTROL
Cycling of the compressor and therefore the tem-
perature of the outlet air is regulated by the thermo-
static control. A thermal sensor extends from the
control to the evaporator housing. When the temper-
ature of the evaporator drops below the set tempera-
ture, the thermostatic control opens the clutch
circuit. The circuit remains open until evaporator
temperature rises above the set temperature.
THERMOSTATIC CONTROL TEST
(1) Turn ignition switch to RUN, A/C blower switch
to ON and thermostatic control set to MAX cool.
(2) Test thermostatic control feed terminal from
blower switch, should be battery voltage. If not re-
pair open from blower switch.
(3) Test thermostatic control output terminal to
pressure cut-out switch, should be battery voltage. If
not, replace thermostatic control.
BLOWER MOTOR SWITCH
The blower switch controls blower motor speed.
The blower motor segment consists of the 3 wires
from the blower switch to the motor. Through the
switch, the 3 wires connect the motor brushes to bat-
tery supply. When connected to battery feed, the sep-
arate brushes provide the 3 blower speeds LO, MED,
and HIGH.
BLOWER MOTOR SWITCH TEST
(1) Turn ignition to RUN position.
(2) Test battery side of fuse for battery voltage. If
not, repair open from ignition switch.
(3) Test A/C blower switch feed circuit from fuse
box should be battery voltage. If not, repair open
from fuse panel.
(4) Test A/C blower switch LO terminal with
blower switch in LO, should be battery voltage. If
not, replace switch.
(5) Test A/C blower switch MED terminal with
blower switch in MED, should be battery voltage. If
not, replace switch.
24 - 16 HEATING AND AIR CONDITIONINGJ

(6) Test A/C blower switch HIGH terminal with
blower switch in HIGH, should be battery voltage. If
not, replace switch.
BLOWER MOTOR
The A/C blower motor is attached to the evaporator
housing mounted under the instrument panel. The
motor has a ground wire and 3 wires connect to the
motor brushes. When voltage is applied to the sepa-
rate brushes it provides the 3 blower speeds LO,
MED, and HIGH.
BLOWER MOTOR TEST
Turn ignition switch to RUN for voltage tests and
turn ignition switch to OFF for resistance test.
(1) Test A/C blower motor ground terminal should
be 0 ohms. If not, repair ground circuit.
(2) Test A/C blower motor connector LO terminal
with blower switch in LO, should be battery voltage.
If not repair open from blower switch. If the blower
motor is still inoperative replace motor.
(3) Test A/C blower motor connector MED terminal
with blower switch in MED, should be battery volt-
age. If not repair open from blower switch. If the
blower motor is still inoperative replace motor.
(4) Test A/C blower motor connector HIGH termi-
nal with blower switch in HIGH, should be battery
voltage. If not, repair open from blower switch. If the
blower motor is still inoperative, replace motor.
HEATER DIAGNOSIS
On LHD XJ vehicles a water valve controls coolant
flow to the heater core. The valve is vacuum oper-
ated. When vacuum is applied, the valve opens and
coolant is directed through the heater core and back
to the engine. When the water valve is closed (no
vacuum applied) coolant flow bypasses the heater
core back to the engine.
The heating system receives its battery feed from
the fuse box. On YJ vehicles the feed circuit runs to
the HEATER/OFF switch and then to the BLOWER
switch. On XJ vehicles the feed circuit runs to the
HEAT/MODE switch and then to the BLOWER
switch.
The blower speed is controlled by the blower switch
and blower resistors. With the switch in LO, battery
voltage is supplied to the motor through all of the re-
sistors. The motor runs slowly. When the blower
switch is moved to a higher speed, battery voltage in-
creases to the blower motor which increase its speed.
This is accomplished by bypassing some of the blower
resistors. When the switch is in HI, blower resistors
are bypassed and battery voltage is applied directly
to the blower motor.
The following chart has been developed for quick
reference.
Refer to the Group 8W Wiring Diagrams for com-
plete wiring schematic.
JHEATING AND AIR CONDITIONING 24 - 17

CLUSTER GROUND; INSTRUMENT
CLUSTER (XJ-RHD)................8W-40-2
CLUSTER ILLUMINATION LAMPS . . 8E-16,8E-26,
8E-34,8E-4
CLUSTER, INSTRUMENT; INSTRUMENT
CLUSTER (XJ).....................8W-40-1
CLUSTER, INSTRUMENT; INSTRUMENT
CLUSTER (XJ-RHD)................8W-40-1
CLUSTER, INSTRUMENT; INSTRUMENT
CLUSTER (YJ).....................8W-40-1
CLUSTER (LHD), HIGH-LINE GAUGE.......8E-9
CLUSTER (LHD), TELL-TALE............8E-10
CLUSTER, LOW-LINE GAUGE............8E-8
CLUSTER, MAIN.....................8E-30
CLUSTERS, INSTRUMENT..........8E-24,8E-1
CLUTCH, A/C COMPRESSOR............24-15
CLUTCH AND BRAKE PACK
REQUIREMENTS, AW-4...............21-341
CLUTCH AND BRAKE PEDAL BUSHINGS . . . 0-22
CLUTCH ASSEMBLY, COMPRESSOR......24-20
CLUTCH COMPONENT LUBRICATION......6-10
CLUTCH COMPONENTS..................6-1
CLUTCH, COMPRESSOR...............24-16
CLUTCH CONTAMINATION...............6-3
CLUTCH COVER AND DISC
INSTALLATION........................6-10
CLUTCH COVER AND DISC REMOVAL.....6-10
CLUTCH COVER AND DISC RUNOUT.......6-3
CLUTCH DIAGNOSIS.....................6-3
CLUTCH DISC AND PLATE THICKNESS,
AW-4 .............................21-338
CLUTCH FLUID LEVEL..................6-14
CLUTCH HOUSING MISALIGNMENT........6-4
CLUTCH HOUSING REPLACEMENT........6-13
CLUTCH HYDRAULIC LINKAGE
INSTALLATION........................6-14
CLUTCH HYDRAULIC LINKAGE REMOVAL . . 6-13
CLUTCH INSPECTION, TORQUE
CONVERTER STATOR................21-199
CLUTCH LINKAGE FLUID.................6-1
CLUTCH MASTER CYLINDER............0-22
CLUTCH MISALIGNMENT................6-3
CLUTCH OPERATION....................6-2
CLUTCH OVERHAUL, DIRECT..........21-228
CLUTCH OVERHAUL, OVERDRIVE
PLANETARY GEAR...................21-218
CLUTCH OVERHAUL, SUN GEAR AND
NO. 1 ONE-WAY....................21-238
CLUTCH PEDAL INSTALLATION..........6-15
CLUTCH PEDAL REMOVAL..............6-15
CLUTCH RELAY, A/C COMPRESSOR . 24-15,24-16
CLUTCH RELAY, AIR CONDITIONING
(A/C)..............................14-58
CLUTCH RELAY TEST, TORQUE
CONVERTER........................14-48
CLUTCH RELAY, TORQUE CONVERTER....14-65
CLUTCH RELAYÐPCM OUTPUT, AIR
CONDITIONING (A/C)..................14-26
CLUTCH RELAYÐPCM OUTPUT, TORQUE
CONVERTER........................14-29
CLUTCH SAFETY PRECAUTIONS..........6-10
CLUTCH SERVICE
.....................6-10
CLUTCH SWITCH, FIN SENSING
CYCLING
......................24-15,24-31
CLUTCH (TCC) SOLENOID AND RELAY,
TORQUE CONVERTER; FUEL/IGNITION
(XJ)
.............................8W-30-4
CLUTCH (TCC) SOLENOID AND RELAY,
TORQUE CONVERTER; TRANSMISSION
CONTROLS (YJ)
...................8W-31-1
CLUTCH (TCC) SOLENOID AND
RELAYÐ2.5L ENGINE ONLY, TORQUE
CONVERTER; TRANSMISSION
CONTROLS (XJ)
...................8W-31-1
CLUTCHÐLOW-REVERSE DRUMÐREAR
SUPPORT OVERHAUL, OVERRUNNING
. . . 21-125
CODE DECODING, VEHICLE
...........Intro.-5
CODE DESIGNATIONS, VEHICLE
........Intro.-1
CODE (DTC), DIAGNOSTIC TROUBLE
.....14-54
CODE, GENERATOR DIAGNOSTIC
TROUBLE
...........................8A-22
CODE IDENTIFICATION, WIRE; WIRING
DIAGRAMSÐGENERAL INFORMATION
(XJ)
...............................8W-1
CODE PLATE, VEHICLE
...............Intro.-4
CODE, SPEED CONTROL DIAGNOSTIC
TROUBLE
...........................8H-5CODES AND DIMENSIONS,
DESIGNATIONS, LABELS/PLATES.......Intro.-1
COIL, EVAPORATOR..................24-30
COIL, IGNITION; FUEL SYSTEM.........14-62
COIL, IGNITION; FUEL/IGNITION (XJ) . . . 8W-30-2
COIL, IGNITION; FUEL/IGNITION (YJ) . . . 8W-30-2
COIL, IGNITION; IGNITION SYSTEMS....8D-22,
8D-4,8D-9
COIL, IGNITION; FUEL/IGNITION
(XJ-RHD).........................8W-30-2
COIL RESISTANCE, IGNITION............8D-9
COIL SPRING........................2-14
COILÐPCM OUTPUT, IGNITION.........14-28
COLD CRANKING SPECIFICATIONS, 2.5L
STARTING SYSTEM...................8A-23
COLD CRANKING SPECIFICATIONS, 4.0L
STARTING SYSTEM...................8A-23
COLUMN ASSEMBLY REPLACEMENT.....19-52
COLUMN COMPONENT SERVICE........19-54
COLUMN GENERAL SERVICEÐXJ,
STEERING..........................19-47
COLUMN, NON-TILT STEERING..........19-60
COLUMN REPLACEMENT..............19-58
COLUMN, TILT STEERING..............19-66
COLUMNÐXJ, STEERING..............19-78
COLUMNÐYJ, STEERING.........19-58,19-78
COMBINATION BUZZER; INTERIOR
LIGHTING (YJ)....................8W-44-1
COMBINATION FLASHER; TURN SIGNALS
(XJ).............................8W-52-1
COMBINATION VALVE..................5-34
COMBINATION VALVE INSTALLATION
(WITH ABS), MASTER CYLINDER.........5-20
COMBINATION VALVE REMOVAL (WITH
ABS), MASTER CYLINDER..............5-17
COMBINATION VALVE REPLACEMENT
(NON-ABS)..........................5-16
COMBUSTION PRESSURE LEAKAGE
TEST, CYLINDER.......................9-6
COMBUSTION PRESSURE LEAKAGE
TEST DIAGNOSIS, CYLINDER.............9-7
COMFORT SWITCH, TRANSMISSION;
TRANSMISSION CONTROLS (XJ-RHD) . . 8W-31-1
COMPASS...........................8C-1
COMPASS/DISPLAY SELF-DIAGNOSTIC
TEST...............................8C-2
COMPASS/THERMOMETER DIAGNOSIS....8C-4
COMPENSATION, CALIPER OPERATION
AND WEAR..........................5-45
COMPONENTSÐYJ, EVAPORATIVE
HOUSING............................24-6
COMPONENTSÐYJ, INSTRUMENT
PANEL............................23-152
COMPONENTSÐYJ VEHICLES, BODY....23-102
COMPRESSION PRESSURE TEST,
CYLINDER............................9-5
COMPRESSOR.......................24-19
COMPRESSOR, A/C; AIR CONDITIONING/
HEATER (YJ)......................8W-42-2
COMPRESSOR, AIR-CONDITIONER........0-21
COMPRESSOR CLUTCH...............24-16
COMPRESSOR CLUTCH, A/C............24-15
COMPRESSOR CLUTCH ASSEMBLY......24-20
COMPRESSOR CLUTCH RELAY, A/C . 24-15,24-16
COMPRESSOR SERVICE...............24-19
CONDENSER, A/C
....................24-34
CONDENSER FILTER DRIERÐ2.5L
ENGINES
...........................24-27
CONDENSERÐ4.0L ENGINES
...........24-28
CONDITION, CHECKING FLUID LEVEL
....21-182
CONDITIONING (A/C) CLUTCH RELAY,
AIR
...............................14-58
CONDITIONING (A/C) CLUTCH
RELAYÐPCM OUTPUT, AIR
............14-26
CONDITIONING (A/C) CONTROLSÐPCM
INPUT, AIR
.........................14-21
CONDITIONING, AIR
..................24-37
CONDITIONING CONTROLSÐXJ
VEHICLES, AIR
......................24-15
CONDITIONING CONTROLSÐYJ
VEHICLES, AIR
......................24-16
CONDITIONING, HEATER AND AIR; AIR
CONDITIONING/HEATER (YJ)
.........8W-42-2
CONDITIONING OPERATION, AIR; AIR
CONDITIONING/HEATER (XJ)
.........8W-42-2
CONDITIONING OPERATION, AIR; AIR
CONDITIONING/HEATER (XJ-RHD)
.....8W-42-2CONDITIONING PERFORMANCE TESTS,
AIR ...............................24-12
CONDITIONING SCHEMATICÐXJ, AIR.....24-5
CONDITIONING TEST PROCEDURES,
HEATING AND AIR....................24-15
CONDITIONS, NORMAL OPERATING........5-3
CONNECTING ROD BEARING FITTING
CHART..........................9-41,9-83
CONNECTING RODS, PISTONS.......9-39,9-81
CONNECTIONS, INTERMITTENT AND
POOR; WIRING DIAGRAMSÐGENERAL
INFORMATION (XJ)...................8W-4
CONNECTIONS, RADIO ILLUMINATION
RELAY..............................8F-4
CONNECTIONS, STARTER RELAY........8A-15
CONNECTOR, ABS DIAGNOSTIC.......5-35,5-3
CONNECTOR AND TERMINAL
REPLACEMENT; WIRING DIAGRAMSÐ
GENERAL INFORMATION (XJ)...........8W-7
CONNECTOR, DATA LINK; ANTI-LOCK
BRAKES (XJ)......................8W-32-2
CONNECTOR, DATA LINK; ANTI-LOCK
BRAKES (XJ-RHD).................8W-32-2
CONNECTOR, DATA LINK; ANTI-LOCK
BRAKES (YJ)......................8W-32-2
CONNECTOR, DATA LINK; FUEL/IGNITION
(XJ).............................8W-30-5
CONNECTOR, DATA LINK; FUEL/IGNITION
(YJ).............................8W-30-5
CONNECTOR, DATA LINK;
TRANSMISSION CONTROLS (XJ-RHD) . . 8W-31-1
CONNECTOR, DATA LINK; FUEL/IGNITION
(XJ-RHD)..........................8W-30-4
CONNECTOR LOCATIONS; CONNECTOR
LOCATIONS (XJ)...................8W-90-1
CONNECTOR LOCATIONS; CONNECTOR
LOCATIONS (XJ-RHD)...............8W-90-1
CONNECTOR LOCATIONS; CONNECTOR
LOCATIONS (YJ)...................8W-90-1
CONNECTOR LOCATIONS; CONNECTOR
PIN OUTS (XJ)....................8W-80-1
CONNECTOR LOCATIONS; CONNECTOR
PIN OUTS (XJ-RHD)................8W-80-1
CONNECTOR LOCATIONS; CONNECTOR
PIN OUTS (YJ)....................8W-80-1
CONNECTOR LOCATIONS; WIRING
DIAGRAMS (XJ)......................8W-1
CONNECTOR LOCATIONS; WIRING
DIAGRAMS (XJ-RHD)..................8W-1
CONNECTOR LOCATIONS; WIRING
DIAGRAMS (YJ)......................8W-1
CONNECTOR, POWERTRAIN CONTROL
MODULE (PCM) 60-WAY...............14-40
CONNECTOR REPLACEMENT; WIRING
DIAGRAMSÐGENERAL INFORMATION
(XJ)...............................8W-6
CONNECTORÐPCM INPUT, DATA LINK . . . 14-22
CONNECTORÐPCM OUTPUT, DATA LINK . . 14-27
CONNECTORS; WIRING DIAGRAMSÐ
GENERAL INFORMATION (XJ)...........8W-2
CONNECTORS (RHD), CLUSTER.........8E-11
CONNECTORS, TERMINAL/CONNECTOR
REPAIRÐMOLEX; WIRING
DIAGRAMSÐGENERAL INFORMATION
(XJ)...............................8W-6
CONSOLE, OVERHEAD; OVERHEAD
CONSOLE (XJ)....................8W-49-1
CONSOLE, OVERHEAD; OVERHEAD
CONSOLE (XJ-RHD)................8W-49-1
CONSOLE REMOVE/INSTALL, OVERHEAD . . . 8C-6
CONSOLE SHIFT, DISASSEMBLYÐ
COLUMN OR........................19-60
CONSOLEÐXJ, FULL FLOOR...........23-95
CONSOLEÐXJ, MINI-FLOOR............23-94
CONSOLEÐXJ, OVERHEAD; BODY
COMPONENTSÐXJ VEHICLES..........23-93
CONSOLEÐXJ, OVERHEAD; LAMPS......8L-17
CONSOLESÐYJ, FLOOR..............23-155
CONTACT PATTERN ANALYSIS,
BACKLASH; FRONT SUSPENSION AND
AXLE...............................2-45
CONTACT PATTERN ANALYSIS,
BACKLASH; REAR SUSPENSION AND
AXLES
..............................3-27
CONTACT/CLOCKSPRING, HORN
.........8G-4
CONTAMINATED BRAKELINING
............5-7
CONTAMINATION, BRAKE FLUID
.......5-10,5-7
CONTAMINATION, CLUTCH
...............6-3
JINDEX 5
Description Group-Page Description Group-Page Description Group-Page

CYLINDER COMBUSTION PRESSURE
LEAKAGE TEST DIAGNOSIS..............9-7
CYLINDER COMPRESSION PRESSURE
TEST................................9-5
CYLINDER DISPOSALÐXJ, LIFTGATE
SUPPORT ROD......................23-63
CYLINDER ENGINE, VACUUM ROUTING
SCHEMATICÐ2.5L 4...................25-3
CYLINDER ENGINE, VACUUM ROUTING
SCHEMATICÐ4.0L 6...................25-3
CYLINDER HEAD COVER, ENGINE....9-22,9-64
CYLINDER HEAD, ENGINE...........9-25,9-67
CYLINDER HEAD GASKET FAILURE
DIAGNOSIS, ENGINE....................9-5
CYLINDER INSTALLATION (NON-ABS),
MASTER............................5-16
CYLINDER INSTALLATION, WHEEL........5-58
CYLINDER OVERHAUL (4-CYLINDER
MODELS), MASTER....................5-16
CYLINDER OVERHAUL, WHEEL...........5-57
CYLINDER REMOVAL (NON-ABS),
MASTER............................5-15
CYLINDER REMOVAL, WHEEL...........5-57
CYLINDER SERVICE, IGNITION SWITCH
AND KEY...........................8D-26
CYLINDERÐCOMBINATION VALVE,
MASTER............................5-15
CYLINDERÐXJ, DOOR KEY LOCK.......23-47
CYLINDERÐXJ, LIFTGATE SUPPORT
ROD...............................23-62
CYLINDERÐYJ, FULL-METAL DOOR KEY
LOCK..............................23-139
CYLINDERÐYJ, TAILGATE LOCK.......23-122
CYLINDER/POWER BOOSTER TEST,
MASTER.............................5-8
CYLINDER/POWER BRAKE BOOSTER,
MASTER............................5-34
CYLINDER/STRIKERÐXJ, LIFTGATE
LATCH/KEY LOCK....................23-61
DAMAGED OR WORN THREADS, REPAIR....9-4
DAMPER, ENGINE.....................9-17
DAMPER, STEERING.............19-17,19-20
DAMPER, VIBRATION..............9-30,9-72
DASH PANEL INSULATOR PANELÐXJ....23-12
DATA LINK CONNECTOR; ANTI-LOCK
BRAKES (XJ)......................8W-32-2
DATA LINK CONNECTOR; ANTI-LOCK
BRAKES (XJ-RHD).................8W-32-2
DATA LINK CONNECTOR; ANTI-LOCK
BRAKES (YJ)......................8W-32-2
DATA LINK CONNECTOR; FUEL/IGNITION
(XJ).............................8W-30-5
DATA LINK CONNECTOR; FUEL/IGNITION
(YJ).............................8W-30-5
DATA LINK CONNECTOR;
TRANSMISSION CONTROLS (XJ-RHD) . . 8W-31-1
DATA LINK CONNECTOR; FUEL/IGNITION
(XJ-RHD).........................8W-30-4
DATA LINK CONNECTORÐPCM INPUT....14-22
DATA LINK CONNECTORÐPCM OUTPUT . . 14-27
DATA, VEHICLE DIMENSION.....Intro.-5,Intro.-6
DATA, VEHICLE LOAD................Intro.-5
DATAÐXJ, VEHICLE LOAD............Intro.-7
DATAÐYJ, VEHICLE LOAD............Intro.-8
DAYTIME RUNNING LAMP (DRL)
MODULE; FRONT LIGHTING (XJ)......8W-50-2
DAYTIME RUNNING LAMP (DRL)
MODULEÐCANADIAN VEHICLES ONLY;
FRONT LIGHTING (YJ)
..............8W-50-2
DAYTIME RUNNING LIGHTS (CANADA
ONLY)ÐXJ
.........................8L-15
DAYTIME RUNNING LIGHTS (CANADA
ONLY)ÐYJ
.........................8L-30
DECODING, VEHICLE CODE
...........Intro.-5
DECODING, VEHICLE IDENTIFICATION
NUMBER (VIN)
.....................Intro.-4
DEFLECTORÐXJ, COWL WEATHERSTRIP
SEAL/CROSSMEMBER AIR
.............23-11
DEFOGGER RELAY
....................8N-3
DEFOGGER RELAY/TIMER
...............8N-1
DEFOGGER RELAY/TIMER REMOVE/
INSTALL
............................8N-4
DEFOGGER SWITCH
...............8N-1,8N-3
DEFOGGER SWITCH REMOVE/INSTALL
....8N-4
DEFROSTER NOZZLE AND DUCT
........24-33
DELAY FUNCTION TROUBLE
DIAGNOSISÐXJ, HEADLAMP
...........8L-14DELAY MODULE, HEADLAMP; FRONT
LIGHTING (XJ)....................8W-50-2
DELAY MODULE, HEADLAMP; FRONT
LIGHTING (XJ-RHD)................8W-50-1
DELAY MODULE REPLACEMENTÐXJ,
HEADLAMP.........................8L-14
DELAY MODULEÐXJ, SENTINEL
HEADLAMP.........................8L-14
DELIVERY SYSTEM, FUEL...............14-3
DEMAGNETIZING, COMPASS............8C-5
DEPTH INFORMATION, PINION GEAR;
FRONT SUSPENSION AND AXLE..........2-39
DEPTH INFORMATION, PINION GEAR;
REAR SUSPENSION AND AXLES..........3-21
DEPTH VARIANCE, PINION GEAR; FRONT
SUSPENSION AND AXLE................2-40
DEPTH VARIANCE, PINION GEAR; REAR
SUSPENSION AND AXLES...........3-22,3-39
DESCRIPTION; HEATING AND AIR
CONDITIONING............24-19,24-23,24-32
DESCRIPTION; TRANSMISSION AND
TRANSFER CASE....................21-165
DESCRIPTION/SYSTEM OPERATION,
MULTI-PORT FUEL INJECTION
(MFI)ÐCOMPONENT..................14-19
DESIGNATIONS, LABELS/PLATES, CODES
AND DIMENSIONS..................Intro.-1
DESIGNATIONS, VEHICLE.............Intro.-1
DESIGNATIONS, VEHICLE CODE........Intro.-1
DETECTION AND REPAIRÐXJ,
STATIONARY GLASS WATER LEAK.......23-76
DETECTION AND REPAIRÐYJ,
STATIONARY GLASS WATER LEAK.......23-150
DEVICES, ELECTROSTATIC DISCHARGE
(ESD) SENSITIVE; WIRING
DIAGRAMSÐGENERAL INFORMATION
(XJ)...............................8W-2
DIAGNOSING PARKING BRAKE
MALFUNCTIONS.......................5-8
DIAGNOSIS; AUDIO SYSTEMS...........8F-2
DIAGNOSIS; BATTERY/STARTING/
CHARGING SYSTEMS DIAGNOSTICS.....8A-10,
8A-11,8A-17,8A-3
DIAGNOSIS; CHIME/BUZZER WARNING
SYSTEMS...........................8U-2
DIAGNOSIS; COOLING SYSTEM...........7-4
DIAGNOSIS; HORNS...................8G-2
DIAGNOSIS; INSTRUMENT PANEL AND
GAUGESÐXJ....................8E-27,8E-5
DIAGNOSIS; OVERHEAD CONSOLE........8C-2
DIAGNOSIS; POWER LOCKS.............8P-2
DIAGNOSIS; POWER MIRRORS..........8T-1
DIAGNOSIS; POWER SEATS.............8R-2
DIAGNOSIS; POWER WINDOWS..........8S-1
DIAGNOSIS; REAR WINDOW DEFOGGER . . . 8N-1
DIAGNOSIS; RESTRAINT SYSTEMS.......8M-2
DIAGNOSIS; STEERING................19-37
DIAGNOSIS; TURN SIGNAL AND HAZARD
WARNING SYSTEMS...................8J-3
DIAGNOSIS; VEHICLE SPEED CONTROL
SYSTEM............................8H-2
DIAGNOSIS, 2.5L STARTER NOISE.......8A-16
DIAGNOSIS, 30RH/32RH TRANSMISSION . 21-70
DIAGNOSIS, ABS BRAKE.................5-3
DIAGNOSIS, ANTILOCK ECU AND HCU......5-3
DIAGNOSIS, AW-4 TRANSMISSION.....21-176
DIAGNOSIS, AXLE NOISE/VIBRATION;
FRONT SUSPENSION AND AXLE..........2-18
DIAGNOSIS, AXLE NOISE/VIBRATION;
REAR SUSPENSION AND AXLES..........3-9
DIAGNOSIS, BATTERY..................8A-4
DIAGNOSIS, BELT.....................7-38
DIAGNOSIS, CHARGING SYSTEM........8A-19
DIAGNOSIS, CLUTCH...................6-3
DIAGNOSIS, COMPASS/THERMOMETER....8C-4
DIAGNOSIS (CONT.), COOLING SYSTEM . . . 7-10,
7-11,7-12,7-7,7-8,7-9
DIAGNOSIS (CONT.), SERPENTINE DRIVE
BELT ...............................7-40
DIAGNOSIS (CONT'D), DISCONNECT
AXLE/SHIFT MOTOR
...................2-30
DIAGNOSIS (CONT'D), SERVICE; FRONT
SUSPENSION AND AXLE
................2-21
DIAGNOSIS (CONT'D), SERVICE; REAR
SUSPENSION AND AXLES
...............3-12
DIAGNOSIS, CONVERTER HOUSING
LEAK
..............................21-75
DIAGNOSIS, COOLING SYSTEM
...........7-6DIAGNOSIS, CYLINDER COMBUSTION
PRESSURE LEAKAGE TEST...............9-7
DIAGNOSIS, DISCONNECT AXLE/SHIFT
MOTOR.............................2-29
DIAGNOSIS, ENGINE....................9-5
DIAGNOSIS, ENGINE CYLINDER HEAD
GASKET FAILURE......................9-5
DIAGNOSIS, EXHAUST SYSTEM..........11-2
DIAGNOSIS, FOG LAMP...........8L-21,8L-3
DIAGNOSIS, GEAR LEAKAGE............19-10
DIAGNOSIS, HEADLAMP...........8L-20,8L-2
DIAGNOSIS, HEATER..................24-17
DIAGNOSIS, HEATING SYSTEM..........24-18
DIAGNOSIS, IGNITION SECONDARY
CIRCUIT...........................8D-10
DIAGNOSIS INFORMATION, GENERAL;
CLUTCH..............................6-3
DIAGNOSIS INFORMATION, GENERAL;
TRANSMISSION AND TRANSFER CASE . . 21-176
DIAGNOSIS, INTAKE MANIFOLD
LEAKAGE.............................9-5
DIAGNOSIS, MANUAL STEERING
SYSTEM............................19-38
DIAGNOSIS, MULTI-PORT FUEL
INJECTION (MFI)ÐGENERAL...........14-35
DIAGNOSIS, NP231 SERVICE..........21-285
DIAGNOSIS, NP242 SERVICE..........21-308
DIAGNOSIS, PERFORMANCE............24-14
DIAGNOSIS, POWER STEERING SYSTEM . . 19-3,
19-4,19-5,19-6,19-7,19-8,19-9
DIAGNOSIS, PUMP LEAKAGE...........19-10
DIAGNOSIS, RADIO....................8F-3
DIAGNOSIS, SERPENTINE DRIVE BELT.....7-39
DIAGNOSIS, SERVICE; FRONT
SUSPENSION AND AXLE................2-20
DIAGNOSIS, SERVICE; PROPELLER
SHAFTS.............................16-3
DIAGNOSIS, SERVICE; REAR
SUSPENSION AND AXLES...............3-11
DIAGNOSIS, SERVICE; TRANSMISSION
AND TRANSFER CASE . 21-180,21-181,21-34,21-2
DIAGNOSIS, SERVICE BRAKE.............5-4
DIAGNOSIS, SPRING AND SHOCK;
FRONT SUSPENSION AND AXLE......2-13,2-15
DIAGNOSIS, SPRING AND SHOCK; REAR
SUSPENSION AND AXLES.............3-3,3-6
DIAGNOSIS, SPRING AND SHOCK
ABSORBER........................3-3,3-6
DIAGNOSIS, STARTER NOISE...........8A-16
DIAGNOSIS, STARTING SYSTEM........8A-12
DIAGNOSIS, SUSPENSION AND
STEERING SYSTEM.....................2-7
DIAGNOSIS, THERMOMETER............8C-2
DIAGNOSIS, TORQUE CONVERTER . 21-86,21-87,
21-88
DIAGNOSIS, TRANSMISSION . 21-78,21-79,21-80,
21-81,21-82,21-83,21-84,21-85
DIAGNOSIS, VIBRATION..........22-10,22-11
DIAGNOSISÐLUBRICATION SERVICE......9-12
DIAGNOSISÐXJ, DOME/COURTESY
LAMP TROUBLE.....................8L-16
DIAGNOSISÐXJ, HEADLAMP DELAY
FUNCTION TROUBLE..................8L-14
DIAGNOSISÐXJ, LIGHTED VANITY
MIRROR TROUBLE...................8L-16
DIAGNOSISÐYJ, DOME/COURTESY
LAMP TROUBLE.....................8L-31
DIAGNOSTIC CONNECTOR, ABS.......5-35,5-3
DIAGNOSTIC PROCEDURESÐXJ.........8L-1
DIAGNOSTIC PROCEDURESÐYJ........8L-19
DIAGNOSTIC SYSTEM, USING
ON-BOARD; BATTERY/STARTING/
CHARGING SYSTEMS DIAGNOSTICS.....8A-22
DIAGNOSTIC SYSTEM, USING
ON-BOARD; VEHICLE SPEED CONTROL
SYSTEM............................8H-5
DIAGNOSTIC TROUBLE CODE (DTC)......14-54
DIAGNOSTIC TROUBLE CODE,
GENERATOR........................8A-22
DIAGNOSTIC TROUBLE CODE, SPEED
CONTROL
...........................8H-5
DIAGNOSTICS (OBD), ON-BOARD;
COOLING SYSTEM
.....................7-4
DIAGNOSTICS (OBD), ON-BOARD; FUEL
SYSTEM
............................14-51
DIAGNOSTICS, ON-BOARD
.............8D-15
DIAGRAM INDEX; AIR CONDITIONING/
HEATER (XJ)
......................8W-42-2
JINDEX 7
Description Group-Page Description Group-Page Description Group-Page

DOOR REMOVAL/INSTALLATIONÐXJ.....23-35
DOOR RESTRAINT REPLACEMENTÐXJ . . . 23-41
DOOR SERVICEÐYJ, FULL-METAL......23-142
DOOR SPACER BLOCKSÐTWO-DOOR
VEHICLES, FRONT....................23-53
DOOR STATIONARY WINDOW
GLASSÐXJ, REAR...................23-46
DOOR TRIM PANELÐXJ...............23-31
DOOR TRIM PANELÐYJ, FULL-METAL . . . 23-137
DOOR VACUUM MOTOR, FRESH AIR.....24-34
DOOR VACUUM MOTOR REPLACEMENT,
A/C RECIRCULATING..................24-27
DOOR VENT WINDOW GLASSÐYJ,
FULL-METAL.......................23-137
DOOR WATERDAMÐYJ, FULL-METAL . . . 23-137
DOOR WEATHERSTRIP SEAL
REPLACEMENTÐYJ.................23-142
DOOR WEATHERSTRIP SEALSÐYJ,
FULL-METAL.......................23-141
DOOR WINDOW EXTERIOR
MOLDINGSÐXJ.....................23-54
DOOR WINDOW GLASS AND DOOR
OPENING WEATHERSTRIP SEALSÐXJ....23-55
DOOR WINDOW GLASS REGULATOR
HANDLEÐYJ, FULL-METAL............23-136
DOOR WINDOW GLASS REGULATORÐ
XJ, FRONT..........................23-42
DOOR WINDOW GLASS REGULATORÐ
XJ, REAR...........................23-44
DOOR WINDOW GLASS REGULATORÐ
YJ, FULL-METAL....................23-138
DOOR WINDOW GLASSÐXJ, FRONT.....23-43
DOOR WINDOW GLASSÐXJ, REAR......23-45
DOOR WINDOW GLASSÐYJ, FULL-
METAL............................23-139
DOORÐYJ, HALF-METAL SOFT TOP.....23-134
DOUBLE CARDAN (CV)................16-11
DRAG LINK....................19-16,19-20
DRAINING COOLING SYSTEM............7-21
DRAW FUSE, IGNITION-OFF.............8F-1
DRAW, IGNITION-OFF.................8A-10
DRB SCAN TOOL; BRAKES...............5-3
DRB SCAN TOOL; COOLING SYSTEM.......7-5
DRB SCAN TOOL; EMISSION CONTROL
SYSTEMS...........................25-2
DRB SCAN TOOL; FUEL SYSTEM........14-54
DRB SCAN TOOL; IGNITION SYSTEMS....8D-8
DRIERÐ2.5L ENGINES, CONDENSER
FILTER.............................24-27
DRIERÐ4.0L ENGINES, FILTER.........24-28
DRIP RAIL MOLDINGÐXJ.............23-25
DRIVE (4WD) SWITCH, FOUR-WHEEL;
INSTRUMENT CLUSTER (XJ-RHD).....8W-40-2
DRIVE (4WD) SWITCH, FOUR-WHEEL;
TRANSMISSION CONTROLS (XJ-RHD) . . 8W-31-1
DRIVE, AUTOMATIC BELT TENSIONERÐ
XJ MODELS WITH RIGHT HAND..........7-42
DRIVE AXLE ASSEMBLY
REPLACEMENTÐXJ VEHICLES; FRONT
SUSPENSION AND AXLE................2-23
DRIVE AXLE ASSEMBLY
REPLACEMENTÐXJ VEHICLES; REAR
SUSPENSION AND AXLES...........3-14,3-31
DRIVE AXLE ASSEMBLY
REPLACEMENTÐYJ VEHICLES; FRONT
SUSPENSION AND AXLE................2-24
DRIVE AXLE ASSEMBLY
REPLACEMENTÐYJ VEHICLES; REAR
SUSPENSION AND AXLES
...............3-14
DRIVE AXLE, FRONT
....................2-3
DRIVE BELT, ACCESSORY
...............0-21
DRIVE BELT DIAGNOSIS (CONT.),
SERPENTINE
.........................7-40
DRIVE BELT DIAGNOSIS, SERPENTINE
.....7-39
DRIVE, BELT SERVICEÐEXCEPT RIGHT
HAND
...............................7-40
DRIVE, BELT SERVICEÐXJ MODELS
WITH RIGHT HAND
....................7-42
DRIVE BELT TENSION
..................7-45
DRIVE BELTS, ENGINE ACCESSORY
.......7-38
DRIVE GEAR, SPEED SENSOR
ROTORÐSPEEDOMETER
.............21-193
DRIVE, GENERATOR REMOVE/INSTALLÐ
LEFT-HAND
..........................8B-6
DRIVE, GENERATOR REMOVE/INSTALLÐ
RIGHT-HAND
.........................8B-7
DRIVE PULLEY REPLACEMENT
..........19-13DRIVE (RHD), BELT TENSIONÐEXCEPT
RIGHT HAND.........................7-38
DRIVE (RHD), BELT TENSIONÐRIGHT
HAND...............................7-38
DRIVE (RHD) MODELS, BELT TENSIONÐ
EXCEPT RIGHT HAND..................7-45
DRIVE SHAFTS.......................0-26
DRIVE VEHICLES, RIGHT HAND..........23-1
DRIVE, VISCOUS FAN..................7-34
DRIVELINE SNAP; FRONT SUSPENSION
AND AXLE...........................2-19
DRIVELINE SNAP; REAR SUSPENSION
AND AXLES..........................3-10
DRIVELINE VIBRATION.................16-3
DRIVER'S DOOR JAMB SWITCH.....8U-1,8U-2
DRIVER'S POWER LOCK SWITCHÐ2-
DOOR (LHD).........................8P-3
DRIVER'S POWER LOCK SWITCHÐ2-
DOOR (RHD).........................8P-4
DRIVER'S POWER LOCK SWITCHÐ4-
DOOR..............................8P-5
DRIVER'S POWER WINDOW SWITCHÐ
2-DOOR (LHD).......................8S-4
DRIVER'S POWER WINDOW SWITCHÐ
2-DOOR (RHD).......................8S-5
DRIVER'S POWER WINDOW SWITCHÐ
4-DOOR.............................8S-3
DRIVER'S SEAT BELT SWITCH.......8U-1,8U-3
DRIVETRAIN.........................0-22
DRL MODULE REPLACEMENTÐXJ.......8L-15
DRL MODULE REPLACEMENTÐYJ........8L-30
DRUM BRAKE ADJUSTMENT............5-57
DRUM BRAKES.......................5-55
DRUM BRAKESHOE INSTALLATION.......5-55
DRUM BRAKESHOE REMOVAL...........5-55
DRUM REFINISHING, BRAKE............5-58
DRUMÐREAR SUPPORT OVERHAUL,
OVERRUNNING CLUTCHÐLOW-
REVERSE..........................21-125
DUCT, DEFROSTER NOZZLE............24-33
DUCT, FRESH AIR INTAKE..............24-34
ECU AND HCU DIAGNOSIS, ANTILOCK......5-3
ECU INSTALLATION (XJ MODELS)........5-40
ECU OPERATION......................5-37
ECU REMOVAL (XJ MODELS)............5-40
ECU REMOVAL/INSTALLATION (YJ
MODELS)............................5-41
EDGE GUARD/EDGE PROTECTOR
STRIPÐXJ, DOOR....................23-54
EFFECTS OF INCORRECT FLUID LEVEL....21-71
EFFORT, HARD PEDAL OR HIGH PEDAL.....5-6
ELECTRIC COOLING FANÐXJ MODELS
WITH 4.0L 6-CYLINDER ENGINE,
AUXILIARY..........................7-35
ELECTRICAL CONTROL, FUEL PUMP......14-5
ELECTRONIC CONTROL UNIT (ECU).......5-34
ELECTROSTATIC DISCHARGE (ESD)
SENSITIVE DEVICES; WIRING
DIAGRAMSÐGENERAL INFORMATION
(XJ)...............................8W-2
ELEMENT, AIR CLEANER; EMISSION
CONTROL SYSTEMS...................25-7
ELEMENT, AIR CLEANER; FUEL SYSTEM . . 14-59
ELEMENT, AIR CLEANER; LUBRICATION
AND MAINTENANCE...................0-18
ELEMENT TEST, OXYGEN SENSOR (O2S)
HEATING...........................14-48
ELEMENTS, HEATER; POWER MIRRORS
(XJ-RHD).........................8W-62-1
EMISSION CONTROL INFORMATION
(VECI) LABEL, VEHICLE.................25-1
EMISSION CONTROL SYSTEM...........0-20
EMISSION CONTROL SYSTEM
MAINTENANCE........................0-4
EMISSION CONTROLS..................25-4
EMR LAMPÐPCM OUTPUT............14-27
ENGINE ACCESSORY DRIVE BELTS.......7-38
ENGINE AND TRANSMISSION/TRANSFER
CASE IDENTIFICATION...............Intro.-5
ENGINE ASSEMBLY (SHORT BLOCK),
SERVICE.............................9-4
ENGINE ASSEMBLYÐXJ VEHICLES
. . . 9-18,9-59
ENGINE ASSEMBLYÐYJ VEHICLES
. . . 9-20,9-62
ENGINE, AUXILIARY ELECTRIC COOLING
FANÐXJ MODELS WITH 4.0L
6-CYLINDER
.........................7-35
ENGINE BLOCK HEATER
................7-44
ENGINE BREAK-IN
.....................0-15ENGINE COOLANT TEMPERATURE
GAUGE; INSTRUMENT CLUSTER (XJ) . . 8W-40-1
ENGINE COOLANT TEMPERATURE
SENSOR; FUEL SYSTEM...............14-60
ENGINE COOLANT TEMPERATURE
SENSOR; FUEL/IGNITION (XJ)........8W-30-3
ENGINE COOLANT TEMPERATURE
SENSOR; FUEL/IGNITION (YJ)........8W-30-3
ENGINE COOLANT TEMPERATURE
SENSOR; IGNITION SYSTEMS......8D-19,8D-5
ENGINE COOLANT TEMPERATURE
SENSOR; FUEL/IGNITION (XJ-RHD)....8W-30-3
ENGINE COOLANT TEMPERATURE
SENSOR TEST; FUEL SYSTEM..........14-46
ENGINE COOLANT TEMPERATURE
SENSOR TEST; IGNITION SYSTEMS.......8D-9
ENGINE COOLANT TEMPERATURE
SENSORÐPCM INPUT................14-23
ENGINE COOLANT TEMPERATURE
WARNING LAMP; INSTRUMENT
CLUSTER (XJ).....................8W-40-1
ENGINE COOLANT TEMPERATURE
WARNING LAMP; INSTRUMENT
CLUSTER (XJ-RHD)................8W-40-1
ENGINE COOLING SYSTEM..............0-18
ENGINE CYLINDER HEAD...........9-25,9-67
ENGINE CYLINDER HEAD COVER.....9-22,9-64
ENGINE CYLINDER HEAD GASKET
FAILURE DIAGNOSIS....................9-5
ENGINE DAMPER.....................9-17
ENGINE DIAGNOSIS....................9-5
ENGINE, DIAGRAM INDEXÐ2.5L;
FUEL/IGNITION (XJ)..................8W-30-6
ENGINE, DIAGRAM INDEXÐ4.0L;
FUEL/IGNITION (XJ)................8W-30-6
ENGINE, ENGINE EXHAUST MANIFOLDÐ
2.5L................................11-7
ENGINE, ENGINE EXHAUST MANIFOLDÐ
4.0L................................11-7
ENGINE, ENGINE FIRING ORDERÐ2.5L
4-CYLINDER........................8D-32
ENGINE, ENGINE FIRING ORDERÐ4.0L
6-CYLINDER........................8D-32
ENGINE EXHAUST MANIFOLDÐ2.5L
ENGINE.............................11-7
ENGINE EXHAUST MANIFOLDÐ4.0L
ENGINE.............................11-7
ENGINE FIRING ORDERÐ2.5L
4-CYLINDER ENGINE.................8D-32
ENGINE FIRING ORDERÐ4.0L
6-CYLINDER ENGINE.................8D-32
ENGINE, INTAKE MANIFOLDÐ2.5L........11-7
ENGINE, INTAKE MANIFOLDÐ4.0L........11-8
ENGINE MAINTENANCE.................0-15
ENGINE MOUNTÐREAR............9-16,9-57
ENGINE MOUNTSÐFRONT..........9-14,9-56
ENGINE OIL..........................0-15
ENGINE OIL CHANGE AND FILTER
REPLACEMENT.......................0-16
ENGINE OIL FILTER....................0-17
ENGINE OIL PRESSURE.................9-7
ENGINE ONLY, POWER STEERING
PRESSURE SWITCHÐ2.5L.............14-63
ENGINE ONLY, TORQUE CONVERTER
CLUTCH (TCC) SOLENOID AND
RELAYÐ2.5L; TRANSMISSION
CONTROLS (XJ)...................8W-31-1
ENGINE ONLY, TRANSMISSION
CONTROL MODULEÐ4.0L;
TRANSMISSION CONTROLS (XJ)......8W-31-1
ENGINE PERFORMANCE.................9-2
ENGINE SERVICE PROCEDURES, 2.5L.....9-13
ENGINE SERVICE PROCEDURES, 4.0L.....9-55
ENGINE SPECIFICATIONS...........9-52,9-93
ENGINE, VACUUM ROUTING
SCHEMATICÐ2.5L 4 CYLINDER..........25-3
ENGINE, VACUUM ROUTING
SCHEMATICÐ4.0L 6 CYLINDER..........25-3
ENGINES, CONDENSER FILTER
DRIERÐ2.5L........................24-27
ENGINES, CONDENSERÐ4.0L..........24-28
ENGINES, FILTER DRIERÐ4.0L
.........24-28
ENGINES, FUEL USAGE STATEMENTÐ
GAS
................................0-19
ENGLISH/SAE CONVERSION, METRIC
. . Intro.-11
ENTRY MODULE, KEYLESS
.........8P-1,8P-7
ENTRY MODULE, REMOTE KEYLESS;
POWER DOOR LOCKS (XJ)
...........8W-61-1
JINDEX 9
Description Group-Page Description Group-Page Description Group-Page

HEATER AND A/C CONTROL
REPLACEMENT......................24-23
HEATER AND A/C OPERATION...........24-1
HEATER AND AIR CONDITIONING; AIR
CONDITIONING/HEATER (YJ).........8W-42-2
HEATER CONTROL PANEL LAMP,
ACCESSORY LAMP; INTERIOR
LIGHTING (YJ)....................8W-44-1
HEATER CONTROL REPLACEMENT.......24-32
HEATER CORE.......................24-26
HEATER CORE AND HOUSING..........24-33
HEATER DIAGNOSIS..................24-17
HEATER ELEMENTS; POWER MIRRORS
(XJ-RHD).........................8W-62-1
HEATER, ENGINE BLOCK................7-44
HEATER HOUSING REPLACEMENT.......24-26
HEATER SYSTEM; AIR CONDITIONING/
HEATER (XJ)......................8W-42-1
HEATER SYSTEM; AIR CONDITIONING/
HEATER (XJ-RHD)..................8W-42-1
HEATER SYSTEM; AIR CONDITIONING/
HEATER (YJ)......................8W-42-1
HEATER/DEFROSTER/INSTRUMENT
PANEL OUTLET VACUUM MOTOR
REPLACEMENT......................24-26
HEATING AND AIR CONDITIONING TEST
PROCEDURES.......................24-15
HEATING ELEMENT TEST, OXYGEN
SENSOR (O2S)......................14-48
HEATING SCHEMATICÐXJ..............24-2
HEATING SYSTEM DIAGNOSIS..........24-18
HELPFUL INFORMATION; CHARGING
SYSTEM (XJ).....................8W-20-1
HELPFUL INFORMATION; CHARGING
SYSTEM (XJ-RHD).................8W-20-1
HELPFUL INFORMATION; CHARGING
SYSTEM (YJ).....................8W-20-1
HELPFUL INFORMATION; POWER SEAT
(XJ).............................8W-63-1
HELPFUL INFORMATION; POWER
WINDOWS (XJ)....................8W-60-2
HELPFUL INFORMATION; POWER
WINDOWS (XJ-RHD)...............8W-60-2
HELPFUL INFORMATION; TRAILER TOW
(XJ).............................8W-54-1
HELPFUL INFORMATION; TRAILER TOW
(XJ-RHD).........................8W-54-1
HIGH MOUNTED STOP LAMP
(CHMSL)ÐXJ, CENTER................8L-12
HIGH MOUNTED STOP LAMP
(CHMSL)ÐYJ, CENTER................8L-28
HIGH PEDAL EFFORT, HARD PEDAL OR.....5-6
HIGH-BEAM INDICATOR LAMP;
INSTRUMENT CLUSTER (XJ).........8W-40-2
HIGH-BEAM INDICATOR LAMP;
INSTRUMENT CLUSTER (XJ-RHD).....8W-40-2
HIGH-LINE GAUGE CLUSTER (LHD).......8E-9
HIGH-PRESSURE CUT-OFF SWITCH,
LOW-PRESSURE................24-15,24-16
HINGE REPLACEMENTÐXJ, HOOD.......23-10
HINGE/HINGE PIN REPLACEMENTÐXJ,
DOOR.............................23-52
HINGEÐXJ, LIFTGATE.................23-60
HINGEÐYJ, TAILGATE................23-121
HINGESÐYJ, FULL-METAL DOOR.......23-140
HITCH, TRAILER.....................23-77
HITCHÐXJ, TRAILER.................23-77
HOISTING, JUMP STARTING, TOWING......0-9
HOISTING RECOMMENDATIONS..........0-10
HOLD AFTER DRIVING THROUGH DEEP
WATER PUDDLES, BRAKES DO NOT.......5-7
HOLDDOWN AND FLOOR BRACKETSÐ
XJ, SPARE TIRE/WHEEL...............23-98
HONING CYLINDER BORES...............9-2
HOOD ADJUSTMENTÐXJ..............23-10
HOOD ALIGNMENTÐYJ..............23-107
HOOD HINGE REPLACEMENTÐXJ.......23-10
HOOD INSULATOR PANELÐYJ.........23-107
HOOD LATCH REPLACEMENTÐXJ.......23-11
HOOD LATCH STRIKER REPLACEMENTÐ
XJ ................................23-11
HOOD SAFETY LATCHÐYJ............23-109
HOODÐXJ...........................23-7
HOODÐYJ
.........................23-107
HOOK, REAR TOW
.....................13-9
HOOKS, FRONT TOW
..................13-7
HOOKS, TOW
........................13-13
HORN; HORN/CIGAR LIGHTER
...........8E-1HORN; HORN/CIGAR LIGHTER (YJ)....8W-41-1
HORN; INSTRUMENT CLUSTER (XJ) . . . 8W-40-1
HORN CONTACT/CLOCKSPRING..........8G-4
HORN RELAY........................8G-1
HORN REMOVE/INSTALL...............8G-3
HORN SWITCH.......................8G-1
HORN SWITCH REMOVE/INSTALL........8G-3
HORNS.............................8G-1
HOSE REPLACEMENT, PRESSURE AND
RETURN............................19-11
HOSE ROUTING SCHEMATICS, VACUUM . . . 25-2
HOSE SPLASH SHIELDÐXJ VEHICLES,
FUEL FILLER.........................13-4
HOSES, BRAKE FLUIDÐBRAKE
BLEEDINGÐBRAKELINES...............5-10
HOSES, BRAKELINES..................5-12
HOSES, COOLING SYSTEM..............7-32
HOSES/TUBES PRECAUTIONS,
REFRIGERANT.......................24-10
HOSES/TUBING, RUBBER AND PLASTIC....0-26
HOUSING, AIR CLEANER...............14-58
HOUSING COMPONENTSÐYJ,
EVAPORATIVE........................24-6
HOUSING END PLUG..................19-28
HOUSING, EVAPORATOR...............24-35
HOUSING, EVAPORATOR/BLOWER.......24-29
HOUSING, HEATER CORE..............24-33
HOUSING INSPECTION AND PARK LOCK
COMPONENT OVERHAUL, ADAPTER/
EXTENSION........................21-127
HOUSING LEAK DIAGNOSIS,
CONVERTER........................21-75
HOUSING MISALIGNMENT, CLUTCH........6-4
HOUSING REPLACEMENT, CLUTCH.......6-13
HOUSING REPLACEMENT, HEATER.......24-26
HOUSING SEAL REPLACEMENT,
ADAPTER..........................21-191
HOUSINGÐXJ, LIFTGATE LICENSE
PLATE LAMP........................23-65
HOUSINGSÐYJ, INSTRUMENT CLUSTER
AND GAUGE........................23-151
HOW TO USE THIS GROUP; WIRING
DIAGRAMS (XJ)......................8W-1
HOW TO USE THIS GROUP; WIRING
DIAGRAMS (XJ-RHD)..................8W-1
HOW TO USE THIS GROUP; WIRING
DIAGRAMS (YJ)......................8W-1
HUB BEARING AND AXLE SHAFT.........2-25
HYDRAULIC CONTROL UNIT; ANTI-LOCK
BRAKES (XJ)......................8W-32-2
HYDRAULIC CONTROL UNIT; ANTI-LOCK
BRAKES (XJ-RHD).................8W-32-2
HYDRAULIC CONTROL UNIT; ANTI-LOCK
BRAKES (YJ)......................8W-32-2
HYDRAULIC CONTROL UNIT (HCU).......5-33
HYDRAULIC LINKAGE COMPONENTS.......6-1
HYDRAULIC LINKAGE INSTALLATION,
CLUTCH.............................6-14
HYDRAULIC LINKAGE REMOVAL,
CLUTCH.............................6-13
HYDRAULIC PRESSURE TEST.....21-177,21-72
HYDRAULIC SYSTEM................21-169
HYDRAULIC TAPPETS..............9-24,9-66
HYDROSTATIC LOCK
....................9-4
IDENTIFICATION, AW-4 ACCUMULATOR
COMPONENT
.......................21-342
IDENTIFICATION, AW-4 VALVE AND
SPRING
...........................21-343
IDENTIFICATION, BOLT
..............Intro.-14
IDENTIFICATION, CIRCUIT; WIRING
DIAGRAMSÐGENERAL INFORMATION
(XJ)
...............................8W-1
IDENTIFICATION, ENGINE AND
TRANSMISSION/TRANSFER CASE
......Intro.-5
IDENTIFICATION, MAJOR COMPONENT
. . Intro.-5
IDENTIFICATION NUMBER (VIN)
DECODING, VEHICLE
................Intro.-4
IDENTIFICATION NUMBER (VIN) PLATE,
VEHICLE
..........................Intro.-4
IDENTIFICATION, SECTION; WIRING
DIAGRAMS (XJ)
......................8W-1
IDENTIFICATION, SECTION; WIRING
DIAGRAMS (XJ-RHD)
..................8W-1
IDENTIFICATION, SECTION; WIRING
DIAGRAMS (YJ)
......................8W-1
IDENTIFICATION, TRANSFER CASE
.....21-284,
21-307IDENTIFICATION, TRANSMISSION . 21-166,21-33,
21-67,21-2
IDENTIFICATION, WIRE CODE; WIRING
DIAGRAMSÐGENERAL INFORMATION
(XJ)...............................8W-1
IDENTIFICATION/SYSTEM OPERATION,
COMPONENT.........................8D-1
IDLE AIR CONTROL (IAC) MOTOR; FUEL
SYSTEM............................14-62
IDLE AIR CONTROL (IAC) MOTOR;
FUEL/IGNITION (XJ)................8W-30-2
IDLE AIR CONTROL (IAC) MOTOR;
FUEL/IGNITION (YJ)................8W-30-2
IDLE AIR CONTROL (IAC) MOTOR;
FUEL/IGNITION (XJ-RHD)............8W-30-2
IDLE AIR CONTROL (IAC) MOTORÐPCM
OUTPUT............................14-27
IDLE AIR CONTROL MOTOR TEST.......14-49
IDLE SWITCH, EXTENDED...........8W-30-5
IDLE SWITCH TEST, EXTENDED.........14-48
IDLE SWITCHÐPCM INPUT, EXTENDED . . . 14-23
IGNITION CABLES, DISTRIBUTOR CAP
AND ROTOR.........................0-20
IGNITION CIRCUIT SENSEÐPCM INPUT . . 14-23
IGNITION COIL; FUEL SYSTEM..........14-62
IGNITION COIL; FUEL/IGNITION (XJ) . . . 8W-30-2
IGNITION COIL; FUEL/IGNITION (YJ) . . . 8W-30-2
IGNITION COIL; IGNITION SYSTEMS.....8D-22,
8D-4,8D-9
IGNITION COIL; FUEL/IGNITION
(XJ-RHD).........................8W-30-2
IGNITION COIL RESISTANCE............8D-9
IGNITION COILÐPCM OUTPUT..........14-28
IGNITION FEED; FUEL/IGNITION
(XJ-RHD).........................8W-30-1
IGNITION KEY-IN SWITCH..........8U-1,8U-2
IGNITION SECONDARY CIRCUIT
DIAGNOSIS.........................8D-10
IGNITION SWITCH; BRAKES.............5-35
IGNITION SWITCH; FUEL/IGNITION (XJ) . 8W-30-1
IGNITION SWITCH; FUEL/IGNITION (YJ) . 8W-30-1
IGNITION SWITCH; FUEL/IGNITION
(XJ-RHD).........................8W-30-1
IGNITION SWITCH AND KEY CYLINDER
SERVICE...........................8D-26
IGNITION SWITCH CONTINUITY TESTS . . . 8D-30
IGNITION SWITCH LAMP; INTERIOR
LIGHTING (XJ)....................8W-44-1
IGNITION SWITCH LAMP; INTERIOR
LIGHTING (XJ-RHD)................8W-44-1
IGNITION SWITCH SERVICE............19-54
IGNITION SWITCHÐXJ MODELS........8D-26
IGNITION SWITCHÐYJ MODELS........8D-29
IGNITION TIMING....................8D-11
ILLUMINATION LAMPS, CLUSTER . . 8E-16,8E-26,
8E-34,8E-4
ILLUMINATION LAMPS, INSTRUMENT
PANEL; INTERIOR LIGHTING (XJ).....8W-44-1
ILLUMINATION LAMPS, INSTRUMENT
PANEL; INTERIOR LIGHTING (XJ-RHD) . 8W-44-1
ILLUMINATION, RADIO; RADIO (XJ)....8W-47-1
ILLUMINATION, RADIO; RADIO
(XJ-RHD).........................8W-47-1
ILLUMINATION, RADIO; RADIO (YJ)....8W-47-1
ILLUMINATION RELAY CONNECTIONS,
RADIO
..............................8F-4
ILLUMINATION RELAY, RADIO
........8F-1,8F-4
IMPACT SENSOR/INFLATOR ASSEMBLY
. . . 8M-2
INCORRECT FLUID LEVEL, EFFECTS OF
. . . 21-71
INDEX, DIAGRAM; AIR CONDITIONING/
HEATER (XJ)
......................8W-42-2
INDEX, DIAGRAM; AIR CONDITIONING/
HEATER (XJ-RHD)
..................8W-42-2
INDEX, DIAGRAM; AIR CONDITIONING/
HEATER (YJ)
...............8W-42-1,8W-42-2
INDEX, DIAGRAM; ANTI-LOCK BRAKES
(XJ)
.............................8W-32-3
INDEX, DIAGRAM; ANTI-LOCK BRAKES
(XJ-RHD)
.........................8W-32-3
INDEX, DIAGRAM; ANTI-LOCK BRAKES
(YJ)
.............................8W-32-2
INDEX, DIAGRAM; CHARGING SYSTEM
(XJ)
.............................8W-20-1
INDEX, DIAGRAM; CHARGING SYSTEM
(XJ-RHD)
.........................8W-20-1
INDEX, DIAGRAM; CHARGING SYSTEM
(YJ)
.............................8W-20-1
JINDEX 13
Description Group-Page Description Group-Page Description Group-Page