1995 JEEP CHEROKEE thermostat

COMPONENT SERVICEÐYJ VEHICLES
INDEX
page page
A/C Blower Motor......................... 35
A/C Condenser........................... 34
Blower Motor (Heating)..................... 33
Blower Motor/Air Door Motor Switch Replacement . 32
Defroster Nozzle and Duct.................. 33
Description.............................. 32
Evaporator and Housing.................... 35
Expansion Valve.......................... 35Fresh Air Door Vacuum Motor................ 34
Fresh Air Intake Duct...................... 34
Heater Control Replacement................. 32
Heater Core and Housing................... 33
Receiver-Drier Replacement................. 35
Temperature Control Thermostat.............. 34
Vent Door Control Cables................... 32
DESCRIPTION
The air conditioning evaporator housing is
mounted to the bottom of instrument panel. The
evaporator, blower motor, thermostat, and expansion
valve are located in the evaporator housing. The com-
pressor, condenser, receiver-dryer and refrigerant
lines are located in the engine compartment.
The heater housing is mounted to the dash panel
behind the instrument panel.
HEATER CONTROL REPLACEMENT
(1) Remove instrument cluster bezel attaching
screws (Fig. 1).
(2) Remove instrument cluster bezel.
(3) Remove screws attaching the heater control
panel to the instrument panel.
(4) Slide control panel outward and disconnect the
cables, vacuum hoses and electrical wires from the
control panel.
(5) Remove control panel.
To install control panel, reverse the removal proce-
dures.
BLOWER MOTOR/AIR DOOR MOTOR SWITCH
REPLACEMENT
(1) Remove heater control panel (Fig. 2).
(2) Remove air door motor switch.
(3) Remove control knob from the blower switch.(4) Remove screws that attach the switch to the
control panel.
(5) Remove switch from the control panel.
To install switches, reverse the removal procedures.
VENT DOOR CONTROL CABLES
REMOVAL
(1) Disconnect cable from the vent door.
(2) Disconnect cable from the heater control panel
lever. The cables are attached to the control panel le-
vers with plastic tabs. Press the tabs together and
lift the cable upward to disengage it from the lever.
(3) Remove the cable. The clip on the cable wire
has 2 functions. It attaches the cable to the vent door
and is also the self adjusting mechanism. The left ca-
ble operates the right cable. The cables must be in-
stalled as outlined to maintain the self adjusting
feature and ensure proper vent door operation.
Fig. 1 Instrument Cluster Bezel
Fig. 2 Control Switches
24 - 32 HEATING AND AIR CONDITIONINGJ

(11) Connect the heater hoses.
(12) Fill cooling system.
FRESH AIR DOOR VACUUM MOTOR
REMOVAL
(1) Remove glove box and assist handle.
(2) Disconnect vacuum hose from the motor.
(3) Remove motor lever retaining clip.
(4) Remove motor attaching nuts and remove the
motor from the fresh air duct.
INSTALLATION
(1) Position motor on fresh air duct and install the
motor attaching nuts.
(2) Align motor lever with the air door lever and
install the lever retaining clip.
(3) Connect vacuum hose to the motor.
(4) Install glove box and assist handle.
FRESH AIR INTAKE DUCT
REVIEW WARNINGS AND CAUTIONS IN
THIS GROUP BEFORE PERFORMING THIS
OPERATION.
REMOVAL
(1) Drain coolant from the radiator.
(2) Disconnect heater hoses.
(3) Remove nuts attaching the heater housing
studs to the dash panel from inside the engine com-
partment.
(4) Disconnect speedometer cable.
(5) Remove glove box and assist handle.
(6) Tilt heater housing back and pull it rearward
and out from under the instrument panel.
(7) Disconnect vent cables.
(8) Remove windshield bracket bolts and lower
windshield.
(9) Remove fresh air intake grille from the cowl.
(10) Remove fresh air intake duct.
INSTALLATION
(1) Install fresh air intake duct.
(2) Install defroster nozzle and duct.
(3) Raise and secure the windshield.
(4) Install fresh air grille on the cowl.
(5) Install vent cables.
(6) Position heater housing on the dash panel. Be
sure all the housing studs extend through the dash
panel.
(7) Install seals on the blower motor and heater
core inlet and outlet tubes.
(8) Install nuts on the heater housing studs.
CAUTION: DO NOT over tighten the attaching nuts.
The housing could become distorted causing air
leaks and improper heater door operation. Tightenthe nuts alternately and evenly until 2 stud threads
are visible beyond each nut.
(9) Install glove box and assist handle.
(10) Connect speedometer cable.
(11) Connect heater hoses.
(12) Fill cooling system.
TEMPERATURE CONTROL THERMOSTAT
REMOVAL
(1) Remove mounting bolts and lower the evapora-
tor housing.
(2) Remove the attaching screws holding the top
and bottom housings together.
(3) Separate the housings.
(4) Remove the thermostat.
INSTALLATION
(1) Install temperature control thermostat. Insert
thermostat capillary tube into the evaporator coil a
minimum of 50 mm (2 inch).
CAUTION: Handle the tube with care to avoid bends
or kinks that could cause the thermostat to mal-
function.
(2) Assemble the housing and install the attaching
screws. DO NOT over tighten the attaching screws.
(3) Install the evaporator housing.
A/C CONDENSER
REVIEW WARNINGS AND CAUTIONS IN
THIS GROUP BEFORE PERFORMING THIS
OPERATION.
REMOVAL
(1) Recover refrigerant from A/C system.
(2) Drain the radiator.
(3) Remove fan shroud and radiator.
(4) Disconnect A/C line from the condenser.
(5) Remove condenser attaching screws and tilt the
bottom of the condenser toward the engine.Plug all
the condenser openings to prevent entry of dirt
or moisture.
(6) Working from under the vehicle, disconnect the
receiver-drier to-evaporator hose fitting from the re-
ceiver-drier.
(7) Remove condenser and receiver-drier as an as-
sembly.
(8) Remove receiver-drier from the condenser, if
necessary.
INSTALLATION
Add 30 ml (1 fluid oz.) of refrigerant oil to the A/C
system if the condenser is replaced.
(1) Attach receiver-drier to the condenser.
(2) Install condenser and connect A/C line to the
receiver-drier.
24 - 34 HEATING AND AIR CONDITIONINGJ

CONTENTS; INSTRUMENT PANEL AND
GAUGESÐXJ........................8E-24
CONTENTS; LAMPS...................8L-19
CONTINUITY (LEFT POSITION), POWER
MIRROR SWITCH.....................8T-3
CONTINUITY, POWER SEAT SWITCH......8R-2
CONTINUITY (RIGHT POSITION), POWER
MIRROR SWITCH.....................8T-3
CONTINUITY TESTS, IGNITION SWITCH . . . 8D-30
CONTROL AND DISPLAY SYMBOLS,
INTERNATIONAL VEHICLE.............Intro.-5
CONTROL AND DISPLAY SYMBOLS,
VEHICLE.........................Intro.-10
CONTROL CABLES, VENT DOOR.........24-32
CONTROL DIAGNOSTIC TROUBLE CODE,
SPEED..............................8H-5
CONTROL, FUEL PUMP ELECTRICAL......14-5
CONTROL (IAC) MOTOR, IDLE AIR; FUEL
SYSTEM............................14-62
CONTROL (IAC) MOTOR, IDLE AIR;
FUEL/IGNITION (XJ)................8W-30-2
CONTROL (IAC) MOTOR, IDLE AIR;
FUEL/IGNITION (YJ)................8W-30-2
CONTROL (IAC) MOTOR, IDLE AIR;
FUEL/IGNITION (XJ-RHD)............8W-30-2
CONTROL (IAC) MOTORÐPCM OUTPUT,
IDLE AIR...........................14-27
CONTROL INFORMATION (VECI) LABEL,
VEHICLE EMISSION....................25-1
CONTROL MODULE (PCM) 60-WAY
CONNECTOR, POWERTRAIN............14-40
CONTROL MODULE (PCM),
POWERTRAIN; EMISSION CONTROL
SYSTEMS...........................25-7
CONTROL MODULE (PCM),
POWERTRAIN; FUEL SYSTEM......14-20,14-64
CONTROL MODULE (PCM),
POWERTRAIN; IGNITION SYSTEMS......8D-11,
8D-23,8D-5
CONTROL MODULE, POWERTRAIN . . . 8H-1,8H-7
CONTROL MODULE (TCM) SERVICE,
TRANSMISSION.....................21-183
CONTROL MODULE, TRANSMISSION;
TRANSMISSION CONTROLS (XJ-RHD) . . 8W-31-1
CONTROL MODULEÐ4.0L ENGINE ONLY,
TRANSMISSION; TRANSMISSION
CONTROLS (XJ)...................8W-31-1
CONTROL MOTOR TEST, IDLE AIR.......14-49
CONTROL PANEL LAMP, ACCESSORY
LAMP AND HEATER; INTERIOR
LIGHTING (YJ)....................8W-44-1
CONTROL REPLACEMENT, HEATER.......24-32
CONTROL REPLACEMENT, HEATER AND
A/C................................24-23
CONTROL SERVO REMOVE/INSTALL,
SPEED..............................8H-9
CONTROL SERVO, SPEED..........8H-1,8H-6
CONTROL SWITCH REMOVE/INSTALL,
SPEED..............................8H-9
CONTROL SWITCH, SPEED.........8H-1,8H-6
CONTROL SYSTEM, EMISSION...........0-20
CONTROL SYSTEM, EVAP
(EVAPORATION)......................25-4
CONTROL SYSTEM MAINTENANCE,
EMISSION............................0-4
CONTROL THERMOSTAT, TEMPERATURE . . 24-34
CONTROL, THERMOSTATIC.............24-16
CONTROL UNIT (ECU), ELECTRONIC......5-34
CONTROL UNIT (HCU), HYDRAULIC.......5-33
CONTROL UNIT, HYDRAULIC; ANTI-LOCK
BRAKES (XJ)......................8W-32-2
CONTROL UNIT, HYDRAULIC; ANTI-LOCK
BRAKES (XJ-RHD).................8W-32-2
CONTROL UNIT, HYDRAULIC; ANTI-LOCK
BRAKES (YJ)......................8W-32-2
CONTROL VALVE FITTING O-RING SEAL,
FLOW..............................19-14
CONTROL, VEHICLE SPEED; VEHICLE
SPEED CONTROL (XJ)..............8W-33-1
CONTROL, VEHICLE SPEED; VEHICLE
SPEED CONTROL (XJ-RHD)..........8W-33-1
CONTROLÐPCM INPUT, SPEED
.........14-25
CONTROLÐPCM OUTPUT, SPEED
.......14-29
CONTROLS AND COMPONENTS,
TRANSMISSION
......................21-67
CONTROLS, EMISSION
.................25-4
CONTROLSÐPCM INPUT, AIR
CONDITIONING (A/C)
..................14-21CONTROLSÐXJ VEHICLES, AIR
CONDITIONING......................24-15
CONTROLSÐYJ VEHICLES, AIR
CONDITIONING......................24-16
CONVERSION FORMULAS AND
EQUIVALENT VALUES...............Intro.-11
CONVERSION, METRIC..............Intro.-16
CONVERSION, METRIC AND ENGLISH/
SAE .............................Intro.-11
CONVERTER, CATALYTIC............11-1,11-4
CONVERTER CLUTCH RELAY TEST,
TORQUE............................14-48
CONVERTER CLUTCH RELAY, TORQUE....14-65
CONVERTER CLUTCH RELAYÐPCM
OUTPUT, TORQUE....................14-29
CONVERTER CLUTCH (TCC) SOLENOID
AND RELAY, TORQUE; FUEL/IGNITION
(XJ).............................8W-30-4
CONVERTER CLUTCH (TCC) SOLENOID
AND RELAY, TORQUE; TRANSMISSION
CONTROLS (YJ)...................8W-31-1
CONVERTER CLUTCH (TCC) SOLENOID
AND RELAYÐ2.5L ENGINE ONLY,
TORQUE; TRANSMISSION CONTROLS
(XJ).............................8W-31-1
CONVERTER DIAGNOSIS, TORQUE . 21-86,21-87,
21-88
CONVERTER HOUSING LEAK DIAGNOSIS . . 21-75
CONVERTER INSTALLATION,
TRANSMISSION.....................21-117
CONVERTER INSTALLATION,
TRANSMISSION AND TORQUE.........21-199
CONVERTER REMOVAL, TRANSMISSION . 21-115
CONVERTER REMOVAL, TRANSMISSION
AND TORQUE......................21-198
CONVERTER STALL TEST..............21-74
CONVERTER STALL TEST, TORQUE.....21-178
CONVERTER STATOR CLUTCH
INSPECTION, TORQUE................21-199
CONVERTER, TORQUE...........21-167,21-67
CONVERTERÐPUMP SEALÐDRIVE
PLATE SERVICE.....................21-116
CONVERTOR, CATALYTIC................25-1
COOLANT............................7-20
COOLANT RESERVE/OVERFLOW SYSTEM . . 7-24
COOLANT ROUTING, SYSTEM.............7-1
COOLANT TEMPERATURE GAUGE,
ENGINE; INSTRUMENT CLUSTER (XJ) . . 8W-40-1
COOLANT TEMPERATURE SENSOR.......25-7
COOLANT TEMPERATURE SENSOR,
ENGINE; FUEL SYSTEM................14-60
COOLANT TEMPERATURE SENSOR,
ENGINE; FUEL/IGNITION (XJ).........8W-30-3
COOLANT TEMPERATURE SENSOR,
ENGINE; FUEL/IGNITION (YJ).........8W-30-3
COOLANT TEMPERATURE SENSOR,
ENGINE; IGNITION SYSTEMS.......8D-19,8D-5
COOLANT TEMPERATURE SENSOR,
ENGINE; FUEL/IGNITION (XJ-RHD).....8W-30-3
COOLANT TEMPERATURE SENSOR TEST,
ENGINE; FUEL SYSTEM................14-46
COOLANT TEMPERATURE SENSOR TEST,
ENGINE; IGNITION SYSTEMS............8D-9
COOLANT TEMPERATURE SENSORÐ
PCM INPUT, ENGINE
..................14-23
COOLANT TEMPERATURE WARNING
LAMP, ENGINE; INSTRUMENT
CLUSTER (XJ)
.....................8W-40-1
COOLANT TEMPERATURE WARNING
LAMP, ENGINE; INSTRUMENT
CLUSTER (XJ-RHD)
................8W-40-1
COOLER FLOW TESTING,
TRANSMISSION
.....................21-113
COOLER LINE AND FITTING SERVICE,
TRANSMISSION
.....................21-111
COOLER LINE FITTINGS, TRANSMISSION
. 21-197
COOLER REVERSE FLUSHING,
TRANSMISSION
.....................21-114
COOLER SERVICE, TRANSMISSION
.....21-196
COOLERS, TRANSMISSION OIL
..........7-36
COOLING FANÐXJ MODELS WITH 4.0L
6-CYLINDER ENGINE, AUXILIARY
ELECTRIC
...........................7-35
COOLING SYSTEM; COOLING SYSTEM
......7-1
COOLING SYSTEM; HEATING AND AIR
CONDITIONING
......................24-10
COOLING SYSTEM CAPACITIES
..........7-45COOLING SYSTEM CLEANING/REVERSE
FLUSHING...........................7-22
COOLING SYSTEM COMPONENTS.........7-1
COOLING SYSTEM DIAGNOSIS............7-6
COOLING SYSTEM, DRAINING...........7-21
COOLING SYSTEM, ENGINE.............0-18
COOLING SYSTEM FANS................7-32
COOLING SYSTEM FOR LEAKS, TESTING . . . 7-22
COOLING SYSTEM HOSES..............7-32
COOLING SYSTEM, REFILLING...........7-21
CORE AND HOUSING, HEATER..........24-33
CORE, HEATER......................24-26
COURTESY LAMPS AND DOME LAMP,
CARGO LAMP; INTERIOR LIGHTING
(XJ).............................8W-44-1
COURTESY LAMPS AND DOME LAMPS;
INTERIOR LIGHTING (YJ)............8W-44-1
COURTESY LAMPS, READING...........8C-1
COVER AND DISC INSTALLATION,
CLUTCH.............................6-10
COVER AND DISC REMOVAL, CLUTCH.....6-10
COVER AND DISC RUNOUT, CLUTCH.......6-3
COVER AND FRAMEÐXJ, BUCKET
SEATBACK..........................23-81
COVER, ENGINE CYLINDER HEAD....9-22,9-64
COVER, FRAME CROSSMEMBER........13-16
COVER OIL SEAL REPLACEMENT,
TIMING CASE....................9-30,9-73
COVER REPLACEMENT, PITMAN SHAFT
AND SIDE..........................19-28
COVER, TIMING CASE..............9-31,9-72
COVERÐXJ, BUCKET SEAT CUSHION....23-81
COVERÐXJ, PARKING BRAKE HANDLE . . . 23-94
COVERÐXJ, REAR SEAT CUSHION......23-82
COVERÐXJ, REAR SEATBACK..........23-84
COVERSÐXJ, B/C-PILLAR AND
LIFTGATE PILLAR TRIM...............23-88
COWL GRILLE AND SCREENÐXJ........23-12
COWL GRILLE AND SCREENÐYJ.......23-109
COWL WEATHERSTRIP SEAL/
CROSSMEMBER AIR DEFLECTORÐXJ....23-11
COWL WEATHERSTRIP SEALÐYJ......23-109
CRANKCASE VENTILATION SYSTEM;
EMISSION CONTROL SYSTEMS..........25-5
CRANKCASE VENTILATION SYSTEM;
LUBRICATION AND MAINTENANCE........0-19
CRANKING SPECIFICATIONS, 2.5L
STARTING SYSTEM COLD..............8A-23
CRANKING SPECIFICATIONS, 4.0L
STARTING SYSTEM COLD..............8A-23
CRANKSHAFT MAIN BEARINGS......9-45,9-87
CRANKSHAFT POSITION SENSOR; FUEL
SYSTEM............................14-60
CRANKSHAFT POSITION SENSOR;
FUEL/IGNITION (XJ)................8W-30-3
CRANKSHAFT POSITION SENSOR;
FUEL/IGNITION (YJ)................8W-30-3
CRANKSHAFT POSITION SENSOR;
IGNITION SYSTEMS..............8D-17,8D-3
CRANKSHAFT POSITION SENSOR;
FUEL/IGNITION (XJ-RHD)............8W-30-3
CRANKSHAFT POSITION SENSOR TEST;
FUEL SYSTEM.......................14-47
CRANKSHAFT POSITION SENSOR TEST;
IGNITION SYSTEMS...................8D-7
CRANKSHAFT POSITION SENSORÐPCM
INPUT.............................14-22
CROSSMEMBER COVER, FRAME........13-16
CROSSMEMBERÐXJ, RADIATOR
SUPPORT...........................23-6
CUSHION AND COVERÐXJ, BUCKET
SEAT ..............................23-81
CUSHION COVERÐXJ, REAR SEAT......23-82
CUSHIONÐXJ, REAR SEAT.............23-82
CUT-OFF SWITCH, LOW-PRESSURE
HIGH-PRESSURE................24-15,24-16
CYCLING CLUTCH SWITCH, FIN
SENSING......................24-15,24-31
CYLINDER AND COMBINATION VALVE
INSTALLATION (WITH ABS), MASTER.....5-20
CYLINDER AND COMBINATION VALVE
REMOVAL (WITH ABS), MASTER.........5-17
CYLINDER BENCH BLEEDING, MASTER
....5-21
CYLINDER BLOCK
.................9-49,9-91
CYLINDER BORES, HONING
..............9-2
CYLINDER, CLUTCH MASTER
............0-22
CYLINDER COMBUSTION PRESSURE
LEAKAGE TEST
........................9-6
6 INDEXJ
Description Group-Page Description Group-Page Description Group-Page

TAILGATE LATCH STRIKERÐYJ........23-123
TAILGATE LOCK CYLINDERÐYJ........23-122
TAILGATE WEATHERSTRIP SEALÐYJ....23-123
TAILGATEÐYJ......................23-121
TAILPIPEÐXJ VEHICLES, MUFFLER AND
EXHAUST............................11-5
TAILPIPEÐYJ VEHICLES, MUFFLER AND
EXHAUST............................11-6
TAKE OUTS; WIRING DIAGRAMSÐ
GENERAL INFORMATION (XJ)...........8W-2
TANK CAPACITIES, FUEL..........14-13,14-67
TANK FILLER TUBE CAP, FUEL;
EMISSION CONTROL SYSTEMS......25-4,25-7
TANK FILLER TUBE CAP, FUEL; FUEL
SYSTEM............................14-13
TANK FILLER TUBE, NO-LEAD FUEL......14-13
TANK, FUEL.........................14-13
TANK PRESSURE RELIEF/ROLLOVER
VALVE, FUEL...................14-16,14-62
TANK SKID PLATE, FUEL...........13-15,13-3
TANK SUPPORT STRAP, FUEL............13-4
TANKS, FUEL...................14-13,14-62
TAPPETS, HYDRAULIC.............9-24,9-66
TELL-TALE CLUSTER (LHD)............8E-10
TEMPERATURE AND PRESSURE CHART,
XJ PERFORMANCE...................24-13
TEMPERATURE AND PRESSURE CHART,
YJ PERFORMANCE...................24-13
TEMPERATURE CONTROL THERMOSTAT . . 24-34
TEMPERATURE GAUGE, ENGINE
COOLANT; INSTRUMENT CLUSTER
(XJ).............................8W-40-1
TEMPERATURE SENSOR, COOLANT.......25-7
TEMPERATURE SENSOR, ENGINE
COOLANT; FUEL SYSTEM..............14-60
TEMPERATURE SENSOR, ENGINE
COOLANT; FUEL/IGNITION (XJ).......8W-30-3
TEMPERATURE SENSOR, ENGINE
COOLANT; FUEL/IGNITION (YJ).......8W-30-3
TEMPERATURE SENSOR, ENGINE
COOLANT; IGNITION SYSTEMS.....8D-19,8D-5
TEMPERATURE SENSOR, ENGINE
COOLANT; FUEL/IGNITION (XJ-RHD) . . . 8W-30-3
TEMPERATURE SENSOR, INTAKE AIR;
FUEL/IGNITION (XJ)................8W-30-4
TEMPERATURE SENSOR, INTAKE AIR;
FUEL/IGNITION (YJ)................8W-30-4
TEMPERATURE SENSOR, INTAKE AIR;
FUEL/IGNITION (XJ-RHD)............8W-30-4
TEMPERATURE SENSOR, INTAKE
MANIFOLD AIR; FUEL SYSTEM..........14-60
TEMPERATURE SENSOR, INTAKE
MANIFOLD AIR; IGNITION SYSTEMS . 8D-23,8D-5
TEMPERATURE, SENSOR RESISTANCE
(OHMS)ÐCOOLANT TEMPERATURE
SENSOR/MANIFOLD AIR...............14-46
TEMPERATURE SENSOR TEST, ENGINE
COOLANT; FUEL SYSTEM..............14-46
TEMPERATURE SENSOR TEST, ENGINE
COOLANT; IGNITION SYSTEMS..........8D-9
TEMPERATURE SENSOR TEST, INTAKE
MANIFOLD AIR; FUEL SYSTEM
..........14-46
TEMPERATURE SENSOR TEST, INTAKE
MANIFOLD AIR; IGNITION SYSTEMS
.....8D-11
TEMPERATURE SENSOR/MANIFOLD AIR
TEMPERATURE, SENSOR RESISTANCE
(OHMS)ÐCOOLANT
..................14-46
TEMPERATURE SENSORÐPCM INPUT,
ENGINE COOLANT
....................14-23
TEMPERATURE SENSORÐPCM INPUT,
INTAKE MANIFOLD AIR
................14-22
TEMPERATURE WARNING LAMP, ENGINE
COOLANT; INSTRUMENT CLUSTER
(XJ)
.............................8W-40-1
TEMPERATURE WARNING LAMP, ENGINE
COOLANT; INSTRUMENT CLUSTER
(XJ-RHD)
.........................8W-40-1
TENSION, DRIVE BELT
.................7-45
TENSION SPECIFICATIONS, BELT
.........7-38
TENSIONER ADJUSTMENT (XJ/YJ),
PARKING BRAKE CABLE
................5-69
TENSIONER REPLACEMENT (XJ),
PARKING BRAKE CABLE
................5-66
TENSIONERÐXJ MODELS WITH RIGHT
HAND DRIVE, AUTOMATIC BELT
..........7-42
TENSIONÐEXCEPT RIGHT HAND DRIVE
(RHD), BELT
.........................7-38TENSIONÐEXCEPT RIGHT HAND DRIVE
(RHD) MODELS, BELT..................7-45
TENSIONÐRIGHT HAND DRIVE (RHD),
BELT ...............................7-38
TERMINAL REPLACEMENT; WIRING
DIAGRAMSÐGENERAL INFORMATION
(XJ)...............................8W-8
TERMINAL REPLACEMENT, CONNECTOR;
WIRING DIAGRAMSÐGENERAL
INFORMATION (XJ)...................8W-7
TERMINAL/CONNECTOR REPAIRÐ
MOLEX CONNECTORS; WIRING
DIAGRAMSÐGENERAL INFORMATION
(XJ)...............................8W-6
TEST, AUTOMATIC SHUTDOWN (ASD)
RELAY..............................8D-6
TEST, CAMSHAFT POSITION SENSOR;
FUEL SYSTEM.......................14-46
TEST, CAMSHAFT POSITION SENSOR;
IGNITION SYSTEMS...................8D-6
TEST, COMPASS/DISPLAY SELF-
DIAGNOSTIC.........................8C-2
TEST, CONVERTER STALL..............21-74
TEST, CRANKSHAFT POSITION SENSOR;
FUEL SYSTEM.......................14-47
TEST, CRANKSHAFT POSITION SENSOR;
IGNITION SYSTEMS...................8D-7
TEST, CYLINDER COMBUSTION
PRESSURE LEAKAGE...................9-6
TEST, CYLINDER COMPRESSION
PRESSURE...........................9-5
TEST DIAGNOSIS, CYLINDER
COMBUSTION PRESSURE LEAKAGE........9-7
TEST, ENGINE COOLANT TEMPERATURE
SENSOR; FUEL SYSTEM................14-46
TEST, ENGINE COOLANT TEMPERATURE
SENSOR; IGNITION SYSTEMS...........8D-9
TEST, EXTENDED IDLE SWITCH.........14-48
TEST, FUEL INJECTOR.................14-51
TEST, FUEL PRESSURE LEAK DOWN......14-8
TEST, FUEL PUMP CAPACITY............14-7
TEST, FUEL SYSTEM PRESSURE....14-51,14-6
TEST, HYDRAULIC PRESSURE....21-177,21-72
TEST, IDLE AIR CONTROL MOTOR.......14-49
TEST, INTAKE MANIFOLD AIR
TEMPERATURE SENSOR; FUEL
SYSTEM............................14-46
TEST, INTAKE MANIFOLD AIR
TEMPERATURE SENSOR; IGNITION
SYSTEMS..........................8D-11
TEST, MANIFOLD ABSOLUTE PRESSURE
(MAP) SENSOR; FUEL SYSTEM.........14-47
TEST, MANIFOLD ABSOLUTE PRESSURE
(MAP) SENSOR; IGNITION SYSTEMS.....8D-11
TEST, MANUAL SHIFTING.............21-177
TEST, MASTER CYLINDER/POWER
BOOSTER............................5-8
TEST, OXYGEN SENSOR (O2S) HEATING
ELEMENT...........................14-48
TEST, POWER BOOSTER CHECK VALVE.....5-9
TEST, POWER BOOSTER VACUUM.........5-9
TEST PROCEDURES, HEATING AND AIR
CONDITIONING......................24-15
TEST, REFRIGERANT SERVICE AND
PERFORMANCE......................24-11
TEST, STARTER MOTOR RELAY.........14-51
TEST, THROTTLE POSITION SENSOR.....8D-15
TEST, THROTTLE POSITION SENSOR
(TPS)..............................14-48
TEST, TORQUE CONVERTER CLUTCH
RELAY
.............................14-48
TEST, TORQUE CONVERTER STALL
.....21-178
TEST, VACUUM SUPPLY
................8H-6
TEST, VEHICLE SPEED SENSOR
.........14-48
TESTING, AUTOMATIC SHUTDOWN
(ASD) RELAY
........................14-46
TESTING COOLING SYSTEM FOR LEAKS
. . . 7-22
TESTING, FUEL PUMP RELAY
...........14-47
TESTING, INTERMITTENT WIPE SWITCH
. . 8K-15
TESTING, NON-INTERMITTENT WIPE
SWITCH
............................8K-14
TESTING PROCEDURESÐXJ, MULTI-
FUNCTION SWITCH
....................8L-4
TESTING REFRIGERANT, LEAK
..........24-11
TESTING, ROAD
.......................5-5
TESTING SPECIFICATIONS, 2.5L
STARTER AND SOLENOID
..............8A-23TESTING SPECIFICATIONS, 4.0L
STARTER AND SOLENOID..............8A-23
TESTING, TRANSMISSION COOLER
FLOW.............................21-113
TESTS, AIR CONDITIONING
PERFORMANCE......................24-12
TESTS, IGNITION SWITCH CONTINUITY . . . 8D-30
TESTS, OXYGEN (O2S) SENSOR........8D-15
TESTS, SYSTEM......................8N-1
TESTS, TROUBLESHOOTING; WIRING
DIAGRAMSÐGENERAL INFORMATION
(XJ)...............................8W-4
TESTS, WATER PUMP..................7-13
THERMOMETER......................8C-1
THERMOMETER DIAGNOSIS.............8C-2
THERMOSTAT........................7-17
THERMOSTAT, TEMPERATURE CONTROL . . 24-34
THERMOSTATIC CONTROL.............24-16
THICKNESS, AW-4 CLUTCH DISC AND
PLATE ............................21-338
THICKNESS, DISC BRAKE ROTOR........5-52
THIS GROUP, HOW TO USE; WIRING
DIAGRAMS (XJ)......................8W-1
THIS GROUP, HOW TO USE; WIRING
DIAGRAMS (XJ-RHD)..................8W-1
THIS GROUP, HOW TO USE; WIRING
DIAGRAMS (YJ)......................8W-1
THREAD NOTATIONÐSAE AND METRIC . Intro.-13
THREADS, REPAIR DAMAGED OR WORN....9-4
THROTTLE BODY.................14-33,14-64
THROTTLE CABLE....................14-17
THROTTLE CABLE, ACCELERATOR
PEDAL........................14-17,14-58
THROTTLE CABLE ADJUSTMENT,
TRANSMISSION.....................21-194
THROTTLE CABLE REPLACEMENT,
TRANSMISSION.....................21-193
THROTTLE POSITION SENSOR;
FUEL/IGNITION (XJ)................8W-30-4
THROTTLE POSITION SENSOR;
FUEL/IGNITION (YJ)................8W-30-4
THROTTLE POSITION SENSOR; IGNITION
SYSTEMS...........................8D-5
THROTTLE POSITION SENSOR;
FUEL/IGNITION (XJ-RHD)............8W-30-4
THROTTLE POSITION SENSOR TEST.....8D-15
THROTTLE POSITION SENSOR (TPS);
FUEL SYSTEM.......................14-65
THROTTLE POSITION SENSOR (TPS);
IGNITION SYSTEMS..................8D-25
THROTTLE POSITION SENSOR (TPS)
SERVICE..........................21-193
THROTTLE POSITION SENSOR (TPS)
TEST..............................14-48
THROTTLE POSITION SENSOR
(TPS)ÐPCM INPUT...................14-25
THROTTLE VALVE CABLE ADJUSTMENT,
TRANSMISSION......................21-71
THROTTLE VALVE CABLE ADJUSTMENT
(XJ/YJ)............................21-101
THROUGH DEEP WATER PUDDLES,
BRAKES DO NOT HOLD AFTER
DRIVING.............................5-7
TIE ROD ......................19-16,19-19
TIGHTENING, WHEEL NUT..........5-54,5-59
TILT STEERING COLUMN..............19-66
TIME LAG TEST.....................21-178
TIME TABLE, BATTERY CHARGING........8A-8
TIMING CASE COVER..............9-31,9-72
TIMING CASE COVER OIL SEAL
REPLACEMENT...................9-30,9-73
TIMING CHAIN AND SPROCKETS.....9-31,9-73
TIMING, IGNITION....................8D-11
TIMING, VALVE...................9-30,9-71
TIPS, TRANSMISSION ASSEMBLY......21-155
TIRE AND WHEEL BALANCE.............22-6
TIRE AND WHEEL RUNOUT.............22-8
TIRE CARRIERÐYJ, EXTERNAL
SPARE/WHEEL......................23-133
TIRE INFLATION PRESSURES............22-2
TIRE NOISE OR VIBRATION.............22-4
TIRE PROBLEMS, WHEEL................5-7
TIRE WEAR PATTERNS
.................22-4
TIRES; LUBRICATION AND
MAINTENANCE
.......................0-32
TIRES; WHEELS AND TIRES
.............22-1
TIRES, CLEANING OF
..................22-2
TIRES, REPLACEMENT
.................22-2
JINDEX 29
Description Group-Page Description Group-Page Description Group-Page

AIR CONDITIONING AND HEATER
GENERAL INFORMATION
On vehicles built with the 2.5L engine, the electri-
cal system has provisions for dealer installed air con-
ditioning. The provisions consist of two connectors
which include circuitry for:
²Circuit C1 - Ignition feed
²Circuit C21 - Blower motor switch
²Circuit C91 - A/C request signal
²Circuit C20 - A/C select signal
²Circuit C13 - Ground for coil side of A/C compres-
sor clutch relay
²Circuit G5 - Battery voltage for coil side of A/C
compressor clutch relay
A/C COMPRESSOR
When the ignition switch is in the RUN position it
connects circuit A1 from fuse 4 in the Power Distri-
bution Center (PDC) to circuit A22. Circuit A22 sup-
plies battery voltage to fuse 12 in the fuse block.
Fuse 12 powers circuit C1.
Circuit C1 supplies battery voltage to the A/C
blower switch. Circuit C21 connects the A/C blower
switch to the A/C low pressure switch.
When the operator selects A/C operation, the A/C
blower switch provides the A/C request signal to cav-
ity 27 of the Powertrain Control Module (PCM) on
circuit C91. At the same time, the blower switch sup-
plies voltage through the A/C thermostat to circuit
C21.
Circuit C21 supplies voltage to the A/C low pres-
sure switch. When the A/C low pressure switch
closes, circuit C20 provides battery voltage to the
contact side of the A/C compressor clutch relay and
provides the A/C select signal to the PCM. Circuit
C20 is double crimped at the contact side of the re-
lay. The C20 circuit branch from the relay supplies
the A/C select input to cavity 28 of the PCM.
After receiving the A/C request signal, the PCM en-
ergizes the A/C compressor clutch relay by providing
ground for the coil side of the relay on circuit C13.
Circuit C13 connects to cavity 34 of the PCM.
Circuit G5 from fuse 9 in the fuse block supplies
voltage to the coil side of the relay. In the START or
RUN positions the ignition switch connects circuit A1
from fuse 4 in the PDC with circuit A21. Circuit A21
connects to the fuse block bus bar that powers circuit
C5 through fuse 9.
When the PCM energizes the A/C compressor
clutch relay, the relay switches from its normally
grounded position to connect circuit C20 to circuit
C3. Circuit C3 supplies voltage to the case grounded
A/C compressor clutch.
HELPFUL INFORMATION
²Circuit G5 is double crimped at the coil side of the
A/C compressor clutch relay. The G5 branch from the
relay continues to the back-up lamp switch.
²Circuit Z1 provides ground for the A/C compressor
clutch relay when the relay is in its normally
grounded position.
A/C-HEATER BLOWER MOTOR
When the ignition switch is in the RUN position it
connects circuit A1 from fuse 4 in the Power Distri-
bution Center (PDC) to circuit A22. Circuit A22 sup-
plies battery voltage to fuse 12 in the fuse block.
Fuse 12 powers circuit C1.
Circuit C1 supplies battery voltage to the A/C
blower switch. In the LOW position, the A/C blower
switch supplies voltage to the low speed brush of the
blower motor. In the MEDIUM position, the switch
supplies voltage to the medium speed bush of the
blower motor. In the HIGH position, the switch sup-
plies voltage to the high speed brush of the blower
motor.
The blower motor has a field jumper. The ground
circuit for the blower motor connects to the cigar
lighter. Circuit Z1 provides ground for the blower mo-
tor and the cigar lighter.
HELPFUL INFORMATION
²Check fuse 4 in the PDC.
²Check fuse 12 in the fuse block.
DIAGRAM INDEX
Component Page
A/C Compressor Clutch.....................8W-42-4
A/C Compressor Clutch Relay................8W-42-4
A/C Thermostat..........................8W-42-5
Blower Motor...........................8W-42-5
Blower Motor Switch......................8W-42-5
Fuse 4 (PDC).........................8W-42-4, 6
Fuse 7 (Fuse Block).......................8W-42-6
Fuse 9 (Fuse Block).....................8W-42-4, 6
Fuse 12 (Fuse Block)....................8W-42-4, 6
Ignition Switch........................8W-42-4, 6
Powertrain Control Module.................8W-42-4, 6
8W - 42 - 2 8W-42 AIR CONDITIONING/HEATERÐYJ VEHICLESJ

CONNECTOR LOCATIONS
GENERAL INFORMATION
This section provides illustrations identifying com-
ponent and connector locations in the vehicle. A con-nector index is provided. Use the wiring diagrams in
each section for connector number identification. Re-
fer to the index for the proper figure number.
CONNECTOR LOCATIONS
Connector # . Color . Location Fig.
C101......BK ...RTFender Side Shield..........1
C102......BK ...RTFender Side Shield Under PDC . .1
C103......BK ...RTFender Side Shield..........1
C104......BK ...LTSide of Battery on Cowl Panel . . .1
C105 2.5L . . . NAT . . RT Rear of Engine............3
C105 4.0L . . . NAT . . RT Rear of Engine............4
C106......BK ...AtLamp...................1
C107......NAT ..Center of Cowl Panel Near
Map Sensor...............1
C108......BK ...LTKick Panel Above Park Brake . . .8
C109......BK ...Under Drivers Seat............8
C110......BK ...Under I.P.Front of Floor Tunnel....6
C111......BK ...Under I.P.Front of Floor Tunnel....6
C112......BK ...Under I.P. RT of Stop Lamp Switch .7
C113......BK ...LTFender Side Shield..........1
C114......BK ...LTSide Cowl Panel............1
C115......BK ...LTFender Side Shield..........1
C116......BK ...LTFender Side Shield..........1
C117......BK ...LTFender Side Shield..........1
C118......BK ...Bottom of Washer Reservoir......2
C119......BK ...Near Bulkhead Disconnect
2.5L only..........Not Shown
C120 2.5L . . . BK . . . Rear of Generator.............3
C120 4.0L . . . BK . . . Rear of Generator.............5
C121 2.5L . . . BK . . . RT Rear of Engine............3
C121 4.0L . . . BK . . . Rear of Generator.............4
C122......BK ...OnReceiver/Drier.............4
C123 2.5L . . . BK . . . RT Side of Engine Rear of Distributor .3
C123 4.0L . . . BK . . . RT Side of Engine Rear of Distributor .4
C124 2.5L . . . BK . . . At End of Distributor Pig Tail.....3
C124 4.0L . . . BK . . . At End of Distributor Pig Tail.....4
C125......GY ...RTSide of Transmission........5
C126......BK ...LTRear of Transmission.........5
C127......BK ...TopofFuel Tank..............9
C128......BK ...TopofRear Cross-member.......9
C129......BK ...TopofRear Cross-member.......9
C130 2.5L . . . BK . . . On Thermostat Housing.........3
C130 4.0L . . . BK . . . On Thermostat Housing.........4
C131 2.5L . . . BK . . . LT Side of Engine Bottom of Intake .3
C131 4.0L . . . BK . . . LT Side of Engine Bottom of Intake .4
C132 2.5L . . . BK . . . Injector #1.................3
C132 4.0L . . . BK . . . Injector #1.................4
C133 2.5L . . . BK . . . Injector #2.................3
C133 4.0L . . . BK . . . Injector #2.................4
C134 2.5L . . . BK . . . Injector #3.................3
C134 4.0L . . . BK . . . Injector #3.................4
C135 2.5L . . . BK . . . Injector #4.................3
C135 4.0L . . . BK . . . Injector #4.................4Connector # . Color . Location Fig.
C136......BK ...Injector #5.................4
C137......BK ...Injector #6.................4
C138 2.5L . . . BK . . . Center of Dash Panel...........1
C138 4.0L . . . BK . . . Center of Dash Panel...........1
C139......BK ...Under Bulkhead LT Side of I.P.....1
C140 2.5L . . . GY . . . LT Rear of Intake.............3
C140 4.0L . . . GY . . . LT Rear of Intake.............4
C141 2.5L . . . BK . . . Rear of Throttle Body..........3
C141 4.0L . . . BK . . . Rear of Throttle Body..........4
C142 2.5L . . . BK . . . On Throttle Body.............3
C142 4.0L . . . BK . . . On Throttle Body.............4
C143 2.5L . . . BK . . . Rear of Intake...............3
C143 4.0L . . . BK . . . Rear of Intake...............4
C144......BK ...Above Bulkhead Disconnect.......1
C145......GY ...OnPower Steering Pump........3
C146......BK ...AtHeadlamp..........Not Shown
C147......YL ...AtSide Marker Lamp..........2
C148......BK ...AtPark/Turn Lamp......Not Shown
C149......BK ...RTSide Behind Bumper.........2
C150......BK ...LTSide Behind Bumper.........2
C151......BK ...AtPark/Turn Lamp............2
C152......YL ...AtSide Marker Lamp. . . .Not Shown
C153......BK ...AtHeadlamp................2
C154......BK ...LTFender Side Shield..........2
C155......BK ...Direct Connection to Horn.......2
C156......BK ...Bottom of Washer Reservoir......2
C201......BK ...LTSide of I.P...............7
C202......BK ...OnFuse Block...............7
C203......BK ...LTKick Panel................7
C204......BK ...LTKick Panel................7
C205......BK ...LTSide Kick Panel Under I.P......7
C206......BK ...AtSpeaker...........Not Shown
C207......BK ...LTofSteering Column Rear
of Cluster.................7
C208......BK ...LTSide of Steering Column......7
C209......BK ...Rear of Switch...............7
C210......BK ...Rear of Switch...............7
C211......BK ...Base of Steering Column........7
C212......BK ...AtWiper Motor..............7
C213......BK ...RTofSteering Column Under I.P. . .7
C214......BK ...RTSide of Cluster Bezel . .Not Shown
C215......BK ...Base of Steering Column........7
C216......BK ...Base of Steering Column........7
C217......BK ...RTSide of Brake Pedal Support . . .7
C218......BK ...Base of Steering Column........7
C219......BK ...Rear of Switch...............7
C220......BK ...Rear of Switch...............7
C221......BK ...Rear of Switch...............7
J8W-90 CONNECTOR LOCATIONSÐYJ VEHICLES 8W - 90 - 1