2002 JEEP LIBERTY warning

Component Page
Low Beam Relay..................... 8Wa-50
Manifold Absolute Pressure Sensor....... 8Wa-30
Multi-Function Switch........... 8Wa-50, 52, 53
Output Speed Sensor.................. 8Wa-31
Overhead Map/Reading Lamp........... 8Wa-44
Oxygen Sensors...................... 8Wa-30
Oxygen Sensor Downstream Relay........ 8Wa-30
Park Brake Switch.................... 8Wa-40
Park Lamp Relay..................... 8Wa-50
Park/Turn Signal Lamps............ 8Wa-50, 52
Passenger Airbag..................... 8Wa-43
Passenger Door Unlock Relay........... 8Wa-61
Passenger Seat Belt Switch............. 8Wa-40
Position Lamps...................... 8Wa-50
Power Distribution Center.............. 8Wa-10
Power Mirrors....................... 8Wa-62
Power Outlet........................ 8Wa-41
Power Seats......................... 8Wa-63
Power Steering Pressure Switch......... 8Wa-30
Power Windows...................... 8Wa-60
Powertrain Control Module............. 8Wa-30
Radiator Fans....................... 8Wa-30
Radio Choke......................... 8Wa-47
Radio.............................. 8Wa-47
Rear Fog Lamp Relay................. 8Wa-51
Rear Power Outlet.................... 8Wa-41
Rear Power Window Switch............. 8Wa-60
Rear Wheel Speed Sensor.............. 8Wa-35
Rear Window Defogger................. 8Wa-48
Rear Wiper Motor.................... 8Wa-53
Red Brake Warning Indicator Switch...... 8Wa-40Component Page
Remote Keyless Entry Module........... 8Wa-45
Remote Radio Switches................ 8Wa-47
Splices............................. 8Wa-10
Sentry Key Immobilizer Module.......... 8Wa-39
Shifter Assembly..................... 8Wa-31
Side Impact Airbag Control Modules...... 8Wa-43
Side Marker Lamps................ 8Wa-50, 52
Side Repeater Lamps............... 8Wa-50, 52
Siren.............................. 8Wa-49
Speed Control Servo................... 8Wa-33
Speed Control Switches................ 8Wa-33
Starter Motor Relay................... 8Wa-21
Starter Motor........................ 8Wa-21
Sunroof............................ 8Wa-64
Tail/Stop Lamps...................... 8Wa-51
Tailgate Cylinder Lock Switch........... 8Wa-61
Tailgate Flip-Up Ajar Switch............ 8Wa-61
Tailgate Lock Motor/Ajar Switch......... 8Wa-61
Throttle Position Sensor................ 8Wa-30
Trailer Tow.......................... 8Wa-54
Transfer Case Position Sensor........ 8Wa-30, 31
Transmission Control Module........... 8Wa-31
Transmission Control Relay............. 8Wa-31
Transmission Solenoid/TRS Assembly..... 8Wa-31
Visor/Vanity Lamps................... 8Wa-44
Washer Fluid Level Switch............. 8Wa-53
Washer Pump........................ 8Wa-53
Water In Fuel Sensor.................. 8Wa-30
Wheel Speed Sensors.................. 8Wa-35
Wiper High/Low Relay................. 8Wa-53
KJ8W-02 COMPONENT INDEX8Wa-02-1

8W-15 GROUND DISTRIBUTION
Component Page
A/C Compressor Clutch...................8Wa-15-6
A/C Low Pressure Switch.................8Wa-15-3
A/C- Heater Control...................8Wa-15-7, 8
Airbag Control Module...................8Wa-15-7
Ash Receiver Lamp.....................8Wa-15-8
Battery.............................8Wa-15-2
Blend Door Actuator.....................8Wa-15-8
Blower Motor Relay.....................8Wa-15-4
Body Control Module....................8Wa-15-8
Brake Lamp Switch.....................8Wa-15-8
Cabin Heater.........................8Wa-15-6
Capacitor............................8Wa-15-2
Center High Mounted Stop Lamp...........8Wa-15-14
Cigar Lighter.........................8Wa-15-8
Compass Mini-Trip Computer..............8Wa-15-14
Controller Antilock Brake.................8Wa-15-2
Data Link Connector....................8Wa-15-2
Engine Control Module...................8Wa-15-7
Engine Coolant Level Sensor...............8Wa-15-6
Flip-Up Glass Release Motor..............8Wa-15-14
Front Wiper Motor......................8Wa-15-3
Fuel Heater..........................8Wa-15-6
Fuel Heater Relay......................8Wa-15-4
Fuel Pump Module.....................8Wa-15-15
G100.............................8Wa-15-2, 7
G101...............................8Wa-15-6
G102...............................8Wa-15-2
G103...............................8Wa-15-6
G104...............................8Wa-15-7
G105...............................8Wa-15-2
G106...............................8Wa-15-2
G110...............................8Wa-15-2
G111 .............................8Wa-15-3, 4
G112...............................8Wa-15-3
G200...............................8Wa-15-7
G201...............................8Wa-15-7
G202...............................8Wa-15-8
G300............................8Wa-15-9, 11
G301............................8Wa-15-9, 10
G302............................8Wa-15-9, 12
G310.........................8Wa-15-13, 14, 15
G311 ..............................8Wa-15-14
G312..............................8Wa-15-14
G320..............................8Wa-15-15
Hazard Switch/Combination Flasher..........8Wa-15-8
Headlamp Leveling Switch................8Wa-15-8
Heated Seat Module....................8Wa-15-10
High Note Horn.......................8Wa-15-3
Hood Ajar Switch.......................8Wa-15-4
Ignition Switch........................8Wa-15-8
Instrument Cluster.....................8Wa-15-8
Intrusion Sensor......................8Wa-15-14
Junction Block........................8Wa-15-8
Left Door Lock Switch...................8Wa-15-11
Left Fog Lamp........................8Wa-15-5
Left Front Door Ajar Switch...............8Wa-15-11
Left Front Door Lock Motor/Ajar Switch.......8Wa-15-11
Left Front Door Speaker..................8Wa-15-7
Left Front Park/Turn Signal Lamp...........8Wa-15-5
Left Headlamp........................8Wa-15-3
Left Heated Seat Assembly...............8Wa-15-10
Left Heated Seat Switch.................8Wa-15-10Component Page
Left Leveling Motor.....................8Wa-15-3
Left Position Lamp.....................8Wa-15-3
Left Power Mirror.....................8Wa-15-11
Left Power Seat Switch..................8Wa-15-10
Left Rear Door Ajar Switch...............8Wa-15-11
Left Rear Door Lock Motor/Ajar Switch.......8Wa-15-11
Left Side Impact Airbag Control Module........8Wa-15-9
Left Side Repeater Lamp..................8Wa-15-5
Left Tail/Stop Lamp....................8Wa-15-15
License Lamp........................8Wa-15-15
Line Pressure Sensor....................8Wa-15-2
Low Note Horn........................8Wa-15-3
Multi- Function Switch...................8Wa-15-8
Oxygen Sensor 1/2 Downstream.............8Wa-15-6
Oxygen Sensor 2/2 Downstream.............8Wa-15-6
Power Mirror Switch.................8Wa-15-11, 12
Power Outlet.........................8Wa-15-8
Power Steering Pressure Switch.............8Wa-15-6
Power Window Master Switch.............8Wa-15-10
Powertrain Control Module................8Wa-15-2
Radiator Fan Motor.....................8Wa-15-3
Radiator Fan Relay.....................8Wa-15-3
Radio..............................8Wa-15-7
Radio Choke..........................8Wa-15-9
Rear Power Outlet.....................8Wa-15-15
Rear Window Defogger..................8Wa-15-14
Rear Wiper Motor.....................8Wa-15-14
Red Brake Warning Indicator Switch..........8Wa-15-4
Right Door Lock Switch..................8Wa-15-12
Right Fog Lamp.......................8Wa-15-5
Right Front Door Ajar Switch..............8Wa-15-12
Right Front Door Lock Motor/Ajar Switch......8Wa-15-12
Right Front Door Speaker.................8Wa-15-7
Right Front Park/Turn Signal Lamp..........8Wa-15-5
Right Headlamp.......................8Wa-15-4
Right Heated Seat Assembly..............8Wa-15-10
Right Heated Seat Switch................8Wa-15-10
Right Leveling Motor....................8Wa-15-4
Right Position Lamp....................8Wa-15-4
Right Power Mirror....................8Wa-15-12
Right Power Seat Switch.................8Wa-15-10
Right Rear Door Ajar Switch..............8Wa-15-12
Right Rear Door Lock Motor/Ajar Switch......8Wa-15-12
Right Side Impact Airbag Control Module.......8Wa-15-9
Right Side Repeater Lamp.................8Wa-15-5
Right Tail/Stop Lamp...................8Wa-15-15
Sentry Key Immobilizer Module.............8Wa-15-8
Shifter Assembly.......................8Wa-15-9
Siren...............................8Wa-15-4
Speed Control Servo.....................8Wa-15-3
Starter Motor Relay.....................8Wa-15-4
Sunroof Motor........................8Wa-15-14
Tailgate Flip-Up Ajar Switch..............8Wa-15-14
Trailer Tow Brake Lamp Relay.............8Wa-15-13
Trailer Tow Connector...................8Wa-15-13
Trailer Tow Left Turn Relay...............8Wa-15-13
Trailer Tow Relay......................8Wa-15-13
Trailer Tow Right Turn Relay..............8Wa-15-13
Transmission Control Module...............8Wa-15-2
Transmission Control Relay................8Wa-15-4
Washer Fluid Level Switch................8Wa-15-3
KJ8W-15 GROUND DISTRIBUTION8Wa-15-1

8W-40 INSTRUMENT CLUSTER
Component Page
Airbag Control Module............. 8Wa-40-4, 8
Body Control Module........... 8Wa-40-3, 4, 5, 8
Controller Antilock Brake............. 8Wa-40-6
Data Link Connector................. 8Wa-40-4
Diagnostic Junction Port...... 8Wa-40-4, 5, 6, 7, 8
Driver Seat Belt Switch.............. 8Wa-40-8
Engine Control Module............... 8Wa-40-6
Engine Coolant Level Sensor.......... 8Wa-40-3
Fuse 9............................ 8Wa-40-3
Fuse 13........................... 8Wa-40-2
Fuse 34........................... 8Wa-40-2
G103............................. 8Wa-40-3Component Page
G111 ............................. 8Wa-40-3
G202........................... 8Wa-40-2, 3
Hazard Switch/Combination Flasher..... 8Wa-40-3
Instrument Cluster........ 8Wa-40-2, 3, 4, 5, 7, 8
Junction Block.................... 8Wa-40-2, 3
Park Brake Switch.................. 8Wa-40-5
Park Lamp Relay................... 8Wa-40-3
Passenger Seat Belt Switch............ 8Wa-40-8
Powertrain Control Module............ 8Wa-40-6
Red Brake Warning Indicator Switch.... 8Wa-40-3
Transmission Control Module.......... 8Wa-40-6
Washer Fluid Level Switch............ 8Wa-40-2
KJ8W-40 INSTRUMENT CLUSTER8Wa-40-1

Component Page
Left Power Seat Motors
(Midline/Highline)................ 8Wa-80-74
Left Power Seat Switch
(Midline/Highline)................ 8Wa-80-74
Left Rear Door Ajar Switch (Base)..... 8Wa-80-74
Left Rear Door Lock Motor/Ajar Switch
(Except Base)................... 8Wa-80-74
Left Rear Door Speaker.............. 8Wa-80-75
Left Rear Power Window Motor
(Midline/Highline)................ 8Wa-80-75
Left Remote Radio Switch (Premium) . . . 8Wa-80-75
Left Side Impact Airbag Control
Module (LSIACM)................ 8Wa-80-75
Left Side Marker Lamp (Except
Built-Up-Export)................. 8Wa-80-76
Left Side Repeater Lamp
(Built-Up-Export)................ 8Wa-80-76
Left Speed Control Switch (Except Base) . 8Wa-80-76
Left Tail/Stop Lamp................ 8Wa-80-76
Left Visor/Vanity Lamp (Except Base) . . . 8Wa-80-76
License Lamp (Built-Up-Export)....... 8Wa-80-77
License Lamp (Except Built-Up-Export) . 8Wa-80-77
Line Pressure Sensor (3.7L).......... 8Wa-80-77
Low Note Horn.................... 8Wa-80-77
Manifold ABSolute Pressure Sensor.... 8Wa-80-77
Multi-Function Switch C1............ 8Wa-80-78
Multi-Function Switch C2............ 8Wa-80-78
Output Speed Sensor (3.7L).......... 8Wa-80-78
Overhead Map/Reading Lamp
(Except Base)................... 8Wa-80-78
Oxygen Sensor 1/1 Upstream......... 8Wa-80-79
Oxygen Sensor 1/2 Downstream....... 8Wa-80-79
Oxygen Sensor 2/1 Upstream (3.7L).... 8Wa-80-79
Oxygen Sensor 2/2 Downstream (3.7L) . . 8Wa-80-79
Passenger Airbag................... 8Wa-80-79
Passenger Seat Belt Switch........... 8Wa-80-80
Power Mirror Switch (Except Base)..... 8Wa-80-80
Power Outlet...................... 8Wa-80-80
Power Steering Pressure Switch....... 8Wa-80-80
Power Window Master Switch
(Midline/Highline)................ 8Wa-80-81
Powertrain Control Module-C1 (2.4L) . . . 8Wa-80-81
Powertrain Control Module-C1 (3.7L) . . . 8Wa-80-82
Powertrain Control Module-C2 (Gas) . . . 8Wa-80-82
Powertrain Control Module-C3 (Gas) . . . 8Wa-80-83
Radiator Fan Motor................. 8Wa-80-84
Radiator Fan Relay................. 8Wa-80-84
Radio C1......................... 8Wa-80-84
Radio C2......................... 8Wa-80-85
Radio C3......................... 8Wa-80-85
Radio Choke (Premium)............. 8Wa-80-85
Rear Power Outlet.................. 8Wa-80-85
Rear Power Window Switch
(Midline/Highline)................ 8Wa-80-86
Rear Wheel Speed Sensor............ 8Wa-80-86Component Page
Rear Wiper Motor.................. 8Wa-80-86
Red Brake Warning Indicator Switch . . . 8Wa-80-86
Remote Keyless Entry Module
(Except Base)................... 8Wa-80-86
Right Courtesy Lamp............... 8Wa-80-87
Right Curtain Airbag................ 8Wa-80-87
Right Cylinder Lock Switch
(Except Base)................... 8Wa-80-87
Right Door Lock Switch (Except Base) . . 8Wa-80-87
Right Fog Lamp................... 8Wa-80-87
Right Front Door Ajar Switch (Base).... 8Wa-80-88
Right Front Door Lock Motor/Ajar Switch
(Except Base)................... 8Wa-80-88
Right Front Door Speaker (Base)...... 8Wa-80-88
Right Front Door Speaker (Premium) . . . 8Wa-80-88
Right Front Impact Sensor........... 8Wa-80-88
Right Front Park/ Turn Signal Lamp . . . 8Wa-80-89
Right Front Power Window Motor
(Midline/Highline)................ 8Wa-80-89
Right Front Wheel Speed Sensor (ABS) . 8Wa-80-89
Right Headlamp (Built-Up-Export)..... 8Wa-80-89
Right Headlamp (Except Built-Up-Export). 8Wa-80-89
Right Heated Seat Assembly (Highline) . 8Wa-80-90
Right Heated Seat Switch (Highline) . . . 8Wa-80-90
Right Instrument Panel Speaker....... 8Wa-80-90
Right Leveling Motor (Built-Up-Export) . 8Wa-80-90
Right Position Lamp (Built-Up-Export) . . 8Wa-80-91
Right Power Mirror (Except Base)...... 8Wa-80-91
Right Power Seat Motors
(Midline/Highline)................ 8Wa-80-91
Right Power Seat Switch
(Midline/Highline)................ 8Wa-80-91
Right Rear Door Ajar Switch (Base).... 8Wa-80-92
Right Rear Door Lock Motor/Ajar Switch
(Except Base)................... 8Wa-80-92
Right Rear Door Speaker............ 8Wa-80-92
Right Rear Power Window Motor
(Midline/Highline)................ 8Wa-80-92
Right Remote Radio Switch (Premium) . . 8Wa-80-92
Right Side Impact Airbag Control Module
(RSIACM)...................... 8Wa-80-93
Right Side Marker Lamp
(Except Built-Up-Export)........... 8Wa-80-93
Right Side Repeater Lamp
(Built-Up-Export)................ 8Wa-80-93
Right Speed Control Switch
(Except Base)................... 8Wa-80-93
Right Tail/Stop Lamp............... 8Wa-80-93
Right Visor/Vanity Lamp (Except Base) . 8Wa-80-94
Sentry Key Immobilizer Module
(Except Base)................... 8Wa-80-94
Shifter Assembly................... 8Wa-80-94
Siren (Built-Up-Export).............. 8Wa-80-94
Speed Control Servo................ 8Wa-80-94
Sunroof Motor..................... 8Wa-80-95
KJ8W-80 CONNECTOR PIN-OUTS8Wa-80-3

INSTRUMENT CLUSTER - BLACK 20 WAY
CAV CIRCUIT FUNCTION
16 L62 20BR/RD RIGHT TURN SIGNAL
17 G11 20WT/BK RED BRAKE WARNING INDICATOR DRIVER
18 G29 20BK/TN LOW WASHER FLUID SENSE
19 F87 20TN/BK FUSED IGNITION SWITCH OUTPUT (RUN-START)
20 - -
INTAKE AIR TEMPERATURE SENSOR (GAS) - GRAY 2 WAY
CAV CIRCUIT FUNCTION
1 K4 18BK/LB SENSOR GROUND
2 K21 18BK/RD INTAKE AIR TEMPERATURE SENSOR SIGNAL
INTRUSION SENSOR (BUILT-UP-EXPORT) - BLACK 6 WAY
CAV CIRCUIT FUNCTION
1 Z2 20BK/LG GROUND
2- -
3 X75 20DG SIREN SIGNAL CONTROL
4- -
5 D25 20YL/VT PCI BUS
6 M1 20PK FUSED B(+)
JUNCTION BLOCK BODY CONTROL MODULE-JB - 26 WAY
CAV CIRCUIT FUNCTION
1 X3 (PREMIUM) HORN RELAY CONTROL
2 P334 DOOR UNLOCK RELAY CONTROL
3 L308 PARK LAMP RELAY CONTROL
4 L96 (PREMIUM) REAR FOG LAMP RELAY CONTROL
5 P109 (EXCEPT BASE) DRIVER DOOR UNLOCK RELAY CONTROL
6 C80 REAR WINDOW DEFOGGER RELAY CONTROL
7- -
8 Z300 GROUND
9 F35 FUSED B(+)
10 L309 HIGH BEAM RELAY CONTROL
11 P31 TAILGATE UNLOCK DRIVER
12 P37 DOOR LOCK SWITCH GROUND
13 L94 LOW BEAM RELAY CONTROL
14 F89 FUSED IGNITION SWITCH OUTPUT (RUN-ACC)
15 M1 FUSED B(+)
16 F87 FUSED IGNITION SWITCH OUTPUT (RUN-START)
17 L26 (EXCEPT BASE) FRONT FOG LAMP RELAY CONTROL
18 P333 DOOR LOCK RELAY CONTROL
19 V16 FRONT WIPER HIGH/LOW RELAY CONTROL
20 V55 FRONT WIPER PARK SWITCH SENSE
KJ8W-80 CONNECTOR PIN-OUTS8Wa-80-65

REAR POWER WINDOW SWITCH (MIDLINE/HIGHLINE) - WHITE 10 WAY
CAV CIRCUIT FUNCTION
1 Q28 14DG/WT RIGHT REAR WINDOW DRIVER DOWN
2 Q14 14GY RIGHT REAR WINDOW DRIVER UP
3 Q24 14DG RIGHT REAR WINDOW DRIVER DOWN
4 Q18 14GY/BK RIGHT REAR WINDOW DRIVER UP
5 Q1 16YL POWER WINDOW SWITCH FEED
6 Q1 16YL POWER WINDOW SWITCH FEED
7 Q17 14DB/WT LEFT REAR WINDOW DRIVER UP
8 Q23 14RD/WT LEFT REAR WINDOW DRIVER DOWN
9 Q27 14RD/BK LEFT REAR WINDOW DRIVER DOWN
10 Q13 14DB LEFT REAR WINDOW DRIVER UP
REAR WHEEL SPEED SENSOR - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 B2 18YL REAR WHEEL SPEED SENSOR 12 VOLT SUPPLY
2 B1 18YL/DB REAR WHEEL SPEED SENSOR SIGNAL
REAR WIPER MOTOR - BLACK 6 WAY
CAV CIRCUIT FUNCTION
1 Z235 18BK GROUND
2 V21 20DB/RD REAR WIPER ON DRIVER
3 G80 20YL/WT FLIP-UP GLASS AJAR SWITCH SENSE
4 V22 20BR/YL REAR WIPER INTERMITTENT DRIVER
5 F70 18PK/BK FUSED B(+)
6- -
RED BRAKE WARNING INDICATOR SWITCH - GRAY 2 WAY
CAV CIRCUIT FUNCTION
1 G11 18WT/BK RED BRAKE WARNING INDICATOR DRIVER
2 Z142 18BK/WT GROUND
REMOTE KEYLESS ENTRY MODULE (EXCEPT BASE)-6WAY
CAV CIRCUIT FUNCTION
1 Y60 RKE DATA
2 Y62 RKE SUPPLY
3 Y61 RKE PROGRAM
4 Y63 RKE GROUND
5 Y64 RKE ANTENNA (+)
6 Y65 RKE ANTENNA (-)
8Wa - 80 - 86 8W-80 CONNECTOR PIN-OUTSKJ

CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
Output Speed Sensor BK Left Side of Transmission 5
Overhead Map/Courtesy Lamp BK Overhead Console N/S
Oxygen Sensor 1/1 Upstream (2.4L) BK Right Side of Engine 12
Oxygen Sensor 1/1 Upstream (3.7L) BK Lower Left Side of Engine 3
Oxygen Sensor 1/2 Downstream
(2.4L)NAT Right Side of Transmission 11, 12
Oxygen Sensor 1/2 Downstream
(3.7L)NAT Left Side of Transmission 5, 7
Oxygen Sensor 2/1 Upstream (3.7L) BK Lower Right Side of Engine 4
Oxygen Sensor 2/2 Downstream
(3.7L)NAT Right Side of Transmission 6
Park Brake Switch BK Center Console 36, 40
Passenger Airbag YL Right Side Instrument Panel N/S
Passenger Seat Belt Switch LG At Passenger Seat N/S
Power Mirror Switch WT In Left Front Door 41
Power Outlet RD Center of Instrument Panel N/S
Power Steering Pressure Switch BK Left Front Side of Engine 3, 15
Power Window Master Switch LG Center Console 36, 40
Powertrain Control Module C1 (2.4L) BK At Powertrain Control Module 13, 14
Powertrain Control Module C1 (3.7L) BK At Powertrain Control Module 8, 9, 10
Powertrain Control Module C2 WT At Powertrain Control Module 8, 9, 10, 13, 14
Powertrain Control Module C3 GY At Powertrain Control Module 31
Radiator Fan Motor BK Right Front Side of Engine
Compartment28
Radiator Fan Relay BK Left Front Side of Engine
Compartment29
Radio C1 GY Rear of Radio N/S
Radio C2 Rear of Radio N/S
Radio C3 Rear of Radio N/S
Radio Choke GY Center of Instrument Panel N/S
Rear Map/Reading Lamp BK Overhead Console N/S
Rear Power Outlet RD Right Rear Quarter Panel 44, 45, 48
Rear Power Window Switch WT Center Console 36, 40
Rear Wheel Speed Sensor BK On Rear Axle N/S
Rear Window Defogger BK At Rear Window 46
Rear Wiper Motor BK In Tailgate 46
Red Brake Warning Indicator Switch
(LHD)GY Left Rear Side of Engine
Compartment31
Red Brake Warning Indicator Switch
(RHD)GY Right Rear Side of Engine
Compartment26
Right Curtain Airbag YL Right Mid B-Pillar 34, 39
Right Cylinder Lock Switch (Except
Base)LG In Right Front Door 41
KJ8W-91 CONNECTOR/GROUND/SPLICE LOCATION8Wa-91-7
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

Possible indications of the cylinder head gasket
leaking between adjacent cylinders are:
²Loss of engine power
²Engine misfiring
²Poor fuel economy
Possible indications of the cylinder head gasket
leaking between a cylinder and an adjacent water
jacket are:
²Engine overheating
²Loss of coolant
²Excessive steam (white smoke) emitting from
exhaust
²Coolant foaming
CYLINDER-TO-CYLINDER LEAKAGE TEST
To determine if an engine cylinder head gasket is
leaking between adjacent cylinders, follow the proce-
dures in Cylinder Compression Pressure Test (Refer
to 9 - ENGINE - DIAGNOSIS AND TESTING). An
engine cylinder head gasket leaking between adja-
cent cylinders will result in approximately a 50±70%
reduction in compression pressure.
CYLINDER-TO-WATER JACKET LEAKAGE TEST
WARNING: USE EXTREME CAUTION WHEN THE
ENGINE IS OPERATING WITH COOLANT PRES-
SURE CAP REMOVED.
VISUAL TEST METHOD
With the engine cool, remove the coolant pressure
cap. Start the engine and allow it to warm up until
thermostat opens.
If a large combustion/compression pressure leak
exists, bubbles will be visible in the coolant.
COOLING SYSTEM TESTER METHOD
WARNING: WITH COOLING SYSTEM TESTER IN
PLACE, PRESSURE WILL BUILD UP FAST. EXCES-
SIVE PRESSURE BUILT UP, BY CONTINUOUS
ENGINE OPERATION, MUST BE RELEASED TO A
SAFE PRESSURE POINT. NEVER PERMIT PRES-
SURE TO EXCEED 138 kPa (20 psi).
Install Cooling System Tester 7700 or equivalent to
pressure cap neck. Start the engine and observe the
tester's pressure gauge. If gauge pulsates with every
power stroke of a cylinder a combustion pressure
leak is evident.
CHEMICAL TEST METHOD
Combustion leaks into the cooling system can also
be checked by using Bloc-Chek Kit C-3685-A or
equivalent. Perform test following the procedures
supplied with the tool kit.
REMOVAL
(1) Disconnect the negative cable from the battery.
(2) Raise the vehicle on a hoist.
(3) Disconnect the exhaust pipe at the left side
exhaust manifold.
(4) Drain the engine coolant. Refer to COOLING
SYSTEM.
(5) Lower the vehicle.
(6) Remove the intake manifold. Refer to proce-
dure in this section.
(7) Remove the cylinder head cover. Refer to proce-
dure in this section.
(8) Remove the fan shroud and fan blade assembly.
Refer to COOLING SYSTEM.
(9) Remove accessory drive belt. Refer to COOL-
ING SYSTEM.
(10) Remove the power steering pump and set
aside.
(11) Rotate the crankshaft until the damper timing
mark is aligned with TDC indicator mark (Fig. 4).
(12) Verify the V6 mark on the camshaft sprocket
is at the 12 o'clock position (Fig. 5). Rotate the crank-
shaft one turn if necessary.
(13) Remove the crankshaft damper. Refer to Pro-
cedure.
(14) Remove the timing chain cover. Refer to pro-
cedure.
Fig. 4 Engine Top Dead Center
1 - TIMING CHAIN COVER
2 - CRANKSHAFT TIMING MARKS
9 - 20 ENGINE - 3.7LKJ
CYLINDER HEAD - LEFT (Continued)