1994 JEEP CHEROKEE transmission fluid

WARNING: CONSTANT TENSION HOSE CLAMPS
ARE USED ON MOST COOLING SYSTEM HOSES.
WHEN REMOVING OR INSTALLING, USE ONLY
TOOLS DESIGNED FOR SERVICING THIS TYPE OF
CLAMP, SUCH AS SPECIAL CLAMP TOOL (NUM-
BER 6094) (FIG. 26). SNAP-ON CLAMP TOOL (NUM-
BER HPC-20) MAY BE USED FOR LARGER
CLAMPS. ALWAYS WEAR SAFETY GLASSES
WHEN SERVICING CONSTANT TENSION CLAMPS.
CAUTION: A number or letter is stamped into the
tongue of constant tension clamps. If replacement
is necessary, use only an original equipment clamp
with matching number or letter.
REMOVAL
(1) Disconnect negative battery cable at battery.
(2) Observe the previousWARNINGS.
(3) Remove pressure cap.
(4) For access to radiator draincock, remove radia-
tor grille (Fig. 29).
(5) Attach one end of a 24 inch long X 1/4 inch ID
hose to the radiator draincock. Put the other end into
a clean container. Open draincock and drain radia-
tor.
(6) If equipped, disconnect electric cooling fan elec-
trical connector (Fig. 31).
(7) Remove electric fan mounting bolts. Lift fan
straight up and out of engine compartment.
(8) Remove the mechanical (non-electrical) fan
shroud mounting bolts. Lift shroud up until align-ment tabs at the bottom are clear of slots in bracket
at bottom of radiator (Fig. 32). Place shroud over me-
chanical fan.
(9) If equipped, disconnect and plug automatic
transmission fluid cooler lines. If equipped with re-
mote cooler, remove line to cooler from bracket at
bottom of radiator.
(10) Disconnect radiator upper and lower hoses.
(11) Mark the position of the hood latch striker on
the radiator crossmember and remove hood latch
striker.
(12) Remove radiator upper crossmember bracket.
(13) Remove radiator upper crossmember.
(14) If equipped with air conditioning, separate ra-
diator from condenser by removing condenser-to-radi-
ator mounting brackets (Fig. 33).
(15) Lift radiator straight up and out of engine
compartment taking care not to damage fins.
INSTALLATION
The radiator has two alignment dowels. They are
located on the bottom tank and fit into rubber grom-
mets in the radiator lower crossmember.
(1) Lower radiator into engine compartment. Posi-
tion alignment dowels into grommets in radiator
lower crossmember (Fig. 34).
(2) If equipped with air conditioning, attach con-
denser to radiator with mounting brackets (Fig. 33).
(3) Install radiator upper crossmember.
(4) Install radiator upper crossmember bracket.
(5) Install hood latch striker.
(6) Connect radiator upper and lower hoses.
Fig. 31 Auxiliary FanÐRemove/Install
Fig. 32 Auxiliary Fan and Mechanical Fan
ShroudÐRemove/InstallÐTypical
7 - 24 COOLING SYSTEMJ

(7) If equipped, connect automatic transmission
fluid cooler lines. If equipped with remote cooler, at-
tach cooler line to bracket at bottom of radiator.
(8) Install electric cooling fan (if equipped). Insert
alignment tabs at bottom of fan shroud into slots in
bracket at bottom of radiator. Tighten mounting
bolts to 4 Nzm (36 in. lbs.) torque.
(9) Connect electric cooling fan electrical connec-
tor.(10) Install mechanical cooling fan shroud. Insert
alignment tabs at bottom of shroud into slots in
bracket at bottom of radiator. Tighten mounting
bolts to 4 Nzm (36 in. lbs.) torque (Fig. 32).
(11) Close radiator draincock.
(12) Install grille.
(13) Connect negative battery cable.
(14) Fill cooling system with correct coolant. Refer
to the Coolant section of this group.
(15) Install pressure cap.
(16) Check and adjust automatic transmission fluid
level (if equipped).
YJ MODELS
WARNING: DO NOT REMOVE THE CYLINDER
BLOCK DRAIN PLUGS OR LOOSEN THE RADIATOR
DRAINCOCK WITH THE SYSTEM HOT AND PRES-
SURIZED. SERIOUS BURNS FROM THE COOLANT
CAN OCCUR.
DO NOT WASTE reusable coolant. If solution is
clean, drain coolant into a clean container for reuse.
WARNING: CONSTANT TENSION HOSE CLAMPS
ARE USED ON MOST COOLING SYSTEM HOSES.
WHEN REMOVING OR INSTALLING, USE ONLY
TOOLS DESIGNED FOR SERVICING THIS TYPE OF
CLAMP, SUCH AS SPECIAL CLAMP TOOL (NUM-
BER 6094) (FIG. 26). SNAP-ON CLAMP TOOL (NUM-
BER HPC-20) MAY BE USED FOR LARGER
CLAMPS. ALWAYS WEAR SAFETY GLASSES
WHEN SERVICING CONSTANT TENSION CLAMPS.
CAUTION: A number or letter is stamped into the
tongue of constant tension clamps. If replacement
is necessary, use only an original equipment clamp
with matching number or letter.
REMOVAL
(1) Disconnect negative battery cable at battery.
(2) Observe the previousWARNINGS.Remove
the radiator cap.
(3) Position drain pan under draincock. Open radi-
ator draincock and drain radiator.
(4) Remove radiator upper and lower hose clamps
and hoses.
(5) Disconnect coolant reserve/overflow tank hose
from radiator.
(6) Remove fan shroud bolts and push shroud back
onto fan (Fig. 35).
(7) If equipped, disconnect and plug automatic
transmission fluid cooler lines.
(8) Remove radiator attaching bolts.
(9) Lift radiator straight up and out of vehicle tak-
ing care not to damage radiator fins.
Fig. 33 Condenser-to-Radiator Mounting
BracketsÐXJ with 4.0L Engine
Fig. 34 Radiator InstallationÐXJ Models with 4.0L
Engine
JCOOLING SYSTEM 7 - 25

INSTALLATION
(1) Install the radiator. Tighten the mounting bolts
to8Nzm (6 ft. lbs.) torque (Fig. 35).
(2) Close radiator draincock.
(3) Install fan shroud. Tighten mounting bolts to
16 Nzm (11 ft. lbs.) torque.
(4) If equipped, remove plugs and connect auto-
matic transmission fluid cooler lines.
(5) Connect radiator hoses and install hose clamps.
(6) Connect negative battery cable.
(7) Fill cooling system with correct coolant. Refer
to the Coolant section of this group.
(8) Connect reserve/overflow tank hose.
(9) Install radiator cap.
(10) Check and adjust automatic transmission fluid
level (if equipped).
COOLING SYSTEM HOSES
Rubber hoses route coolant to and from the radia-
tor, intake manifold and heater core. All XJ models
equipped with air conditioning have a coolant control
valve. This is located in-line with the heater core in-
let and outlet hoses. It controls coolant flow to the
heater core when the air conditioning system is in
operation.
Radiator lower hoses are spring-reinforced to pre-
vent collapse from water pump suction at moderate
and high engine speeds.
WARNING: CONSTANT TENSION HOSE CLAMPS
ARE USED ON MOST COOLING SYSTEM HOSES.
WHEN REMOVING OR INSTALLING, USE ONLY
TOOLS DESIGNED FOR SERVICING THIS TYPE OF
CLAMP, SUCH AS SPECIAL CLAMP TOOL (NUM-
BER 6094) (FIG. 36). SNAP-ON CLAMP TOOL (NUM-
BER HPC-20) MAY BE USED FOR LARGER
CLAMPS. ALWAYS WEAR SAFETY GLASSES
WHEN SERVICING CONSTANT TENSION CLAMPS.CAUTION: A number or letter is stamped into the
tongue of constant tension clamps. If replacement
is necessary, use only an original equipment clamp
with matching number or letter.
Inspect the hoses at regular intervals. Replace
hoses that are cracked, feel brittle when squeezed, or
swell excessively when the system is pressurized.
For all vehicles: In areas where specific routing
clamps are not provided, be sure that hoses are posi-
tioned with sufficient clearance. Check clearance
from exhaust manifolds and pipe, fan blades, drive
belts and sway bars. Improperly positioned hoses can
be damaged, resulting in coolant loss and engine
overheating.
Ordinary worm gear type hose clamps (when
equipped) can be removed with a straight screw-
driver or a hex socket.To prevent damage to
hoses or clamps, the hose clamps should be
tightened to 4 Nzm (34 in. lbs.) torque. Do not
over tighten hose clamps.
When performing a hose inspection, inspect the ra-
diator lower hose for proper position and condition of
the internal spring.
COOLING SYSTEM FANS
All models are equipped with a mechanical temper-
ature controlled fan. The viscous fan drive is a
torque-and-temperature-sensitive clutch unit. It auto-
matically increases or decreases fan speed to provide
proper engine cooling. XJ models equipped with a
4.0L engine may also have an auxiliary electrical
fan. This is with models that have air conditioning
and/or heavy duty cooling.
VISCOUS FAN DRIVE OPERATION
The viscous fan drive (Fig. 37) is a silicone-fluid-
filled coupling. On some engines it connects the fan
assembly to the fan/water pump pulley. The coupling
allows the fan to be driven in a normal manner. This
is done at low engine speeds while limiting the top
Fig. 35 RadiatorÐRemove/InstallÐYJ Models
Fig. 36 Hose Clamp ToolÐTypical
7 - 26 COOLING SYSTEMJ

through the relay. When coolant temperature is be-
low 88ÉC (190ÉF), the PCM opens the ground path to
the relay. This will prevent the cooling fan from be-
ing energized.
Whenever the air conditioning is used, the PCM
engages the auxiliary cooling fan. It provides a
ground path to the cooling fan relay.
DIAGNOSIS
The powertrain control module (PCM) will enter a
diagnostic trouble code (DTC) number 35 in memory
if it detects a problem in the auxiliary cooling fan re-
lay or circuit. This will be read as a flashing signal
at the instrument panel mounted Malfunction Indica-
tor Lamp (formerly referred to as the Check Engine
Lamp). Refer to On-Board Diagnostics in Group 14,
Fuel Systems for information on accessing a DTC.
The DTC can also be accessed through the DRB
scan tool. Refer to the appropriate Powertrain Diag-
nostic Procedures manual for diagnostic information
and operation of the DRB scan tool.
REMOVAL
The auxiliary fan is attached to the radiator upper
crossmember behind the radiator.
(1) Remove the fan retaining bolts from radiator
upper crossmember (Fig. 41).
(2) Disconnect the electric fan connector.
(3) Lift fan straight up and out of vehicle.
INSTALLATION
(1) Align lower retaining tabs of fan shroud with
slots in bracket at bottom of radiator. Push fan down
into position.
(2) Tighten the mounting bolts to 4 Nzm (31 in.
lbs.) torque.
(3) Connect auxiliary cooling fan electrical connec-
tor.
TRANSMISSION OIL COOLERS
WATER-TO-OIL COOLER
All models equipped with an automatic transmis-
sion are equipped with a transmission oil cooler
mounted internally within the radiator tank. This in-
ternal cooler is supplied as standard equipment on
all models equipped with an automatic transmission.
Transmission oil is cooled when it passes through
this separate cooler. In case of a leak in the internal
radiator mounted transmission oil cooler, engine
coolant may become mixed with transmission fluid or
transmission fluid may enter engine cooling system.
Both cooling system and transmission should be
drained and inspected if the internal radiator
mounted transmission cooler is leaking.
Also refer to the section on Transmission Air-to-Oil
Coolers. This auxiliary air-to-oil cooler is an option
on most engine packages.
REPLACING WATER-TO-OIL COOLER IN
RADIATOR SIDE TANK
The internal transmission oil cooler located within
the radiator is not serviceable. If it requires service,
the radiator must be replaced.
Once the repaired or replacement radiator has been
installed, fill the cooling system and inspect for
leaks. Refer to the Refilling Cooling System and
Testing Cooling System For Leaks sections in this
group. If the transmission operates properly after re-
pairing the leak, drain the transmission and remove
the transmission oil pan. Inspect for sludge and/or
rust. Inspect for a dirty or plugged inlet filter. If
none of these conditions are found, the transmission
Fig. 40 PDCÐXJ Models
Fig. 41 Auxiliary FanÐRemove/Install
JCOOLING SYSTEM 7 - 29

Wiring Diagram Name Sheet Number
Fuse #15...............................1,41
Fuse #17...........................2,10,55,74
Fuse #18...............................1,66
Fuse #19.............................1,41,47
Gauges
Engine Coolant Temperature Gauge...........59,60,61
Engine Oil Pressure Gauge.................59,60,61
Fuel Gauge...........................59,60,61
G Sensor..................................30
Generator.................................5,6
Glove Box Lamp.............................49
Hazard Flasher............................35,46
Headlamp Delay Module........................43
Headlamp Dimmer Switch.......................41
Headlamp Switch...........................41,42
Fog Lamp Illumination........................42
Fog Lamp Switch...........................42
Headlamp Dimmer Switch.....................41
Headlamp Switch...........................41
Headlamps...............................39,40
Heat Mode Select Switch.......................68
Heated Oxygen Sensor.......................13,21
Heated Rear Window..........................66
Relay...................................66
Grid...................................66
Switch..................................66
Heated Rear Window Switch Lamp.................47
Heater A/C Panel Lamp........................47
Heater and A/C System......................69,70
A/C Mode Selector Switch.....................70
A/C Compressor Clutch.......................69
A/C Compressor Clutch Relay...................69
A/C Heater Blower Motor......................70
A/C Thermostat............................69
A/C Low Pressure Switch.....................69
Blower Resistor............................70
Blower Switch.............................70
Powertrain Control Module.....................69
Heat Mode Select Switch.......................68
Heater Blower Motor..........................68
Heater,Engine Block...........................37
Heater System..............................68
Blower Resistor............................68
Blower Switch.............................68
Heater Blower Motor.........................68
Heater Mode Select Switch....................68
Heavy Duty Cooling 4.OL.......................23
Fan Control Relay...........................23
Powertrain Control Module.....................23
Radiator Fan Motor.........................23
High Beam Indicator Lamp..................59,60,61
High Beam Relay............................40
Hi-Line Instrument Cluster.......................61
Horn Brush/Slip Ring..........................34
Horn Relay................................34
Horn Switch................................34
Horns....................................34
Hydraulic Actuation Unit, ABS....................33Wiring Diagram Name Sheet Number
Idle Air Control Motor.......................15,22
Ignition Key Warning Switch.....................74
Ignition Switch..............................2,9
Ignition System............................9,10
Injectors................................15,22
In Line Circuit Breaker..........................2
Instrument Cluster............................55
Powertrain Control Module.....................55
Washer Fluid Level Switch.....................55
Instrument Cluster (Hi-Line)......................61
Instrument Cluster (Lo-Line).....................60
Instrument Cluster (Standard)....................59
Instrument Cluster Connector..................55,108
Instrument Cluster Printed Circuit Board (W/ABS).......57
Instrument Cluster Printed Circuit Board (W/O ABS)......58
Instrument Cluster Indicators.....................56
Instrument Panel Ground.......................62
Instrument Panel Illumination...................47,48
Ashtray Lamp.............................48
Cigar Lighter Lamp..........................48
Fog Lamp Illumination........................47
Heater A/C Panel Lamp.......................47
Heater Rear Window Switch Lamp................47
Rear Wiper Wash Switch Lamp..................47
Transfer Case Lamp.........................48
Transmission Range Switch Lamp................48
Intake Air Temperature Sensor..................14,19
Intermittent Front Wipers/Washers.................64
Intermittent Wiper Module.......................64
Lamps
ABS Green Indicator Lamp.....................57
ABS Red Indicator Lamp......................57
Ashtray Lamp.............................48
Cargo Lamp..............................50
Center High Mounted Stop Lamps................98
Cigar Lighter Lamp..........................48
Dome Lamp..............................51
Dome/Reading Lamp.........................51
Fog Lamp Illumination........................47
4WD Indicator Lamp.....................26,57,58
Full Time Indicator Lamp....................57,58
Glove Box Lamp...........................49
Heated Rear Window Switch Lamp...............47
Heater A/C Panel Lamp.......................47
High Beam Indicator Lamp.................59,60,61
Indicator Lamp 4WD.......................57,58
Instrument Cluster Illumination Lamps.........59,60,61
Left Back-Up Lamp........................91,93
Left Courtesy Lamp.........................49
Left Fog Lamp.............................39
Left Headlamp.............................39
Left Park/Turn Signal Lamp....................39
Left Side Marker Lamp (Front)..................39
Left Side Marker Lamp (Rear)................91,93
Left Tail/Stop Lamp.......................91,93
Left Turn Indicator Lamp..................59,60,61
Left Turn Lamp (Amber)....................91,93
Left Vanity Lamp...........................51
JWIRING DIAGRAMS 8W - 151

Wiring Diagram Name Sheet Number
Power Steering Pressure Switch.................15
Power Window Switch.......................79
Rear Wiper/Washer Switch.....................65
Reed Switch..............................26
Right Door Lock Switch......................85
Right Front Door Jamb Switch..................76
Right Front Door Window Switch................81
Right Rear Door Jamb Switch..................76
Right Rear Door Window Switch.................82
Seat Belt Switch...........................74
Stop Lamp Switch..........................46
Transmission Range Switch....................25
Turn/Hazard Flasher Switch....................46
Vehicle Speed Control Switch...................35
Washer Fluid Level Switch.....................55
Wiper/Washer Switch......................63,64
Tachometer............................59,60,61
Telltale Connector.........................56,107
Thermostat,A/C..............................69
Throttle Position Sensor......................14,19
Trailer Tow Connector..........................93
Trailer Tow In-Line Circuit Breaker.................97
Transmission Range Switch......................25
Transmission Range Switch Lamp..................48
Transfer Case Lamp...........................48
Transmission Control Magnetic Trigger Wheel..........26
Transmission Control System...................25,26
Back-Up Lamp Switch........................25
Front Axle Switch...........................26
Data Link Connector.........................25
Indicator Lamp 4WD.........................26Wiring Diagram Name Sheet Number
Transmission Control Magnetic Trigger Wheel.........26
Transmission Control Module.................25,26
Transmission Range Switch....................25
Turn Signal Flasher...........................45
Turn/Hazard Flasher Switch Assembly...............46
Transmission Control Module (TCM) Connector........105
Underhood Lamp............................34
Underhood Lamp/Horn System....................34
Horn Relay...............................34
Horn Brush/Slip Ring........................34
Horn Switch..............................34
Horn Left Side.............................34
Horn Right Side............................34
Underhood Lamp...........................34
Upshift Indicator Lamp.......................57,58
Vanity Lamps.............................51,53
Vehicle Speed Control Sensor..................11,20
Vehicle Speed Control Servo.....................36
Vehicle Speed Control System..................35,36
Hazard Flasher.............................35
Powertrain Control Module...................35,36
Vehicle Speed Control Switch...................35
Voltmeter..............................59,60,61
Wall Plug,Engine Block Heater....................37
Washer Fluid Level Switch......................55
Wheel Sensors..............................29
Windshield Wiper Circuit Breaker................63,64
Windshield Wiper System (Standard)................63
Windshield Wiper System (Intermittent)..............64
Wiper/Washer Switch........................63,64
JWIRING DIAGRAMS 8W - 155

Wiring Diagram Name Sheet Number
Front Washer Pump.........................34
Front Wiper Motor..........................34
Intermittent Wiper Module.....................33
Park Switch..............................34
Washer Fluid Level Switch.....................33
Washer Switch............................33
Windshield Wiper/Washer Circuit Breaker...........33
Wiper/Washer Switch........................33
Fuel Gauge Sensor...........................54
Fuel Injectors...............................14
Fuel Pump.................................54
Fuel Pump Module...........................54
Fuel Pump Relay............................3,9
Fuel Tank System............................54
Full Time Indicator Lamp.....................39, 40
Fuse Application Chart........................1,2
Fuse Panel..............................62, 63
Fuses
Fuse #2.............................2,4,60
Fuse #4..........................2,33,44,46
Fuse #5.............................1,4,27
Fuse #6.............................1,4,51
Fuse #9...............................1,19
Fuse #10..............................1,19
Fuse #13............................2,47,58
Fuse #14.........................2,23,33,60
Fuse #19............................2,33,35
Fuse #25............................1,19,25
Fuse #26..........................1,8,37,43
F1 ...................................3,4
F2 ...................................3,9
F3 ...................................3,17
F4 ...................................3,4
F5 .................................3,6,17
F6 .................................3,9,10
F7 .....................................3
F8 ...................................3,4
F9 .....................................3
F10 ...................................3,4
F11 ...................................3,4
F12 ...................................3,4
F13 ...................................3,4
F14 ...................................3,4
F15 ...................................3,4
F16 ...................................3,4
Generator..................................5
Glove Box Lamp.............................29
Hazard Flasher..............................32
Headlamp Dimmer Switch.......................19
Headlamp Switch...........................1,19
Headlamp Switch System.....................19, 20
Fog Lamp Illumination........................20
Fog Lamp Switch...........................20
Headlamp Dimmer Switch.....................19
Headlamp Switch...........................19
Headlamps..............................21, 22
Heated Oxygen Sensor.........................13
Heated Rear Window..........................60Wiring Diagram Name Sheet Number
Relay...................................60
Switch..................................60
Switch Illumination..........................25
Heater A/C Panel Lamp........................25
Heater and A/C System......................45, 46
A/C Compressor Clutch.......................45
A/C Compressor Clutch Relay...................45
A/C Heater Blower Motor......................46
A/C Low Pressure Switch.....................45
A/C Mode Selector Switch.....................46
A/C Thermostat............................45
Blower Resistor............................46
Blower Switch.............................46
Powertrain Control Module.....................45
Heater System..............................44
Blower Resistor............................44
Blower Switch.............................44
Heater Blower Motor.........................44
Heat Mode Select Switch......................44
Heater Blower Motor..........................44
Heater Element..............................52
Heavy Duty Cooling (4.0L).......................7
Fan Control Relay...........................7
Powertrain Control Module.....................7
Radiator Fan Motor..........................7
High-Beam Indicator Lamp......................41
Horn System...............................27
Horn Brush/Slip Ring........................27
Horn Relay...............................27
Horn Switch..............................27
Left Side Horn.............................27
Right Side Horn............................27
Idle Air Control Motor.........................14
Ignition Key Warning Switch.....................43
Ignition Switch...............................8
Ignition System..............................8
Instrument Cluster............................37
Instrument Cluster Connector.....................37
Instrument Cluster Connector 16 Way...............69
Instrument Cluster Indicator Printed Circuit Board.......40
Instrument Cluster Printed Circuit Board (Standard)......41
Instrument Panel Ground.......................32
Instrument Panel Illumination..................25, 26
Heated Rear Window Switch Illumination...........25
Heater A/C Panel Lamp.......................25
Rear Wiper/Wash Switch Lamp..................26
Transfer Case Lamp.........................26
Transmission Range Lamp.....................26
Intake Air Temp Sensor........................11
Intermittent Front Wipers/Washers...............33, 34
Intermittent Wiper Module.......................33
Lamps
Ashtray Illumination Lamp.....................26
Back-Up Lamp..........................55, 56
Cargo Lamp..............................30
Check Engine Indicator Lamp................39, 40
Cigar Lighter Illumination......................58
Dome Lamp..............................31
8W - 272 WIRING DIAGRAMSJ

Wiring Diagram Name Sheet Number
Turn/Hazard Flasher Switch....................24
Vehicle Speed Control Switch...................53
Washer Switch............................33
Washer Fluid Level Switch.....................33
Wiper/Washer Switch........................33
Telltale Connector..........................38, 68
Telltale Printed Circuit Board.....................38
Throttle Position (Sensor).......................11
Transfer Case Lamp...........................26
Transmission Control Magnetic Trigger Wheel..........17
Transmission Control Module..................17, 18
Transmission Control Module Connector..............72
Transmission Control System...............16, 17, 18
Back-Up Lamp Switch........................16
Front Axle Switch...........................16
Reed Switch..............................18
Transmission Data Link Connector.................17Wiring Diagram Name Sheet Number
Transmission Range Lamp......................26
Transmission Range Switch......................17
Trigger Wheel...............................18
Vehicle Speed Sensor (VSS).....................16
Turn Signal Flasher...........................23
Underhood Lamp............................28
Upshift Indicator Lamp......................39, 40
Vanity Lamps...............................31
Vehicle Speed Control Servo.....................53
Vehicle Speed Control Switch.....................53
Vehicle Speed Control System....................53
Vehicle Speed Sensor (VSS).....................16
Wall Plug, Engine Block Heater...................58
Washer Fluid Level Switch......................33
Windshield Wiper Circuit Breaker................2,33
Wiper/Washer Switch..........................33
Windshield Wiper System (Intermittent)...........33, 34
JWIRING DIAGRAMS 8W - 275