Engine JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual

8W-33 VEHICLE SPEED CONTROL
Component Page
Brake Lamp Switch.................. 8W-33-2
Clockspring..................... 8W-33-3, 4, 5
Electronic Speed Control Servo.......... 8W-33-2
Engine Control Module.............. 8W-33-2, 4
Fuse 23............................ 8W-33-2
G108.............................. 8W-33-2
G300.............................. 8W-33-2Component Page
G301.............................. 8W-33-2
Junction Block...................... 8W-33-2
Powertrain Control Module........... 8W-33-2, 3
Shifter Assembly..................... 8W-33-3
Speed Control Switch No. 1............ 8W-33-5
Speed Control Switch No. 2............ 8W-33-5
WJ8W-33 VEHICLE SPEED CONTROL 8W - 33 - 1

8W-35 ANTILOCK BRAKES
Component Page
Brake Lamp Switch.................. 8W-35-5
Controller Antilock Brake...... 8W-35-2, 3, 4, 5, 6
Diagnostic Junction Port............. 8W-35-2, 3
Engine Control Module.............. 8W-35-4, 5
Fuse 4........................... 8W-35-2, 3
Fuse 19.......................... 8W-35-2, 3
Fuse 23............................ 8W-35-5
Fuse 25.......................... 8W-35-2, 3
G107............................ 8W-35-2, 3Component Page
Junction Block.................. 8W-35-2, 3, 5
Left Front Wheel Speed Sensor......... 8W-35-6
Left Rear Wheel Speed Sensor.......... 8W-35-6
Power Distribution Center........... 8W-35-2, 3
Powertrain Control Module............. 8W-35-4
Red Brake Warning Indicator Switch..... 8W-35-5
Right Front Wheel Speed Sensor........ 8W-35-6
Right Rear Wheel Speed Sensor......... 8W-35-6
WJ8W-35 ANTILOCK BRAKES 8W - 35 - 1

8W-39 VEHICLE THEFT SECURITY SYSTEM
Component Page
Automatic Headlamp Light
Sensor/VTSS LED.................. 8W-39-3
Body Control Module . . . 8W-39-2, 3, 4, 5, 7, 8, 9, 10
Clockspring....................... 8W-39-7, 8
Diagnostic Junction Port............... 8W-39-9
Driver Cylinder Lock Switch............ 8W-39-6
Driver Door Lock Motor/Ajar Switch...... 8W-39-6
Driver Door Module................ 8W-39-6, 11
Engine Starter Motor Relay............ 8W-39-2
Fuse 7........................ 8W-39-3, 9, 11
Fuse 8............................. 8W-39-2
Fuse 18.......................... 8W-39-7, 8
Fuse 22.......................... 8W-39-2, 9
Fuse 28............................ 8W-39-2
G106............................. 8W-39-10
G108............................ 8W-39-7, 8
G200.............................. 8W-39-9
G300............................ 8W-39-5, 6Component Page
G301....................... 8W-39-4, 5, 6, 11
Hood Ajar Switch................... 8W-39-10
Horn No. 1....................... 8W-39-7, 8
Horn No. 2....................... 8W-39-7, 8
Horn Relay....................... 8W-39-7, 8
Horn Switch...................... 8W-39-7, 8
Ignition Switch...................... 8W-39-2
Junction Block........ 8W-39-2, 3, 4, 5, 7, 8, 9, 11
Left Liftgate Ajar Switch.............. 8W-39-4
Left Rear Door Lock Motor/Ajar Switch . . . 8W-39-5
Liftgate Flip-Up Ajar Switch............ 8W-39-4
Passenger Door Lock Motor/Ajar Switch . . . 8W-39-6
Passenger Door Module............... 8W-39-6
Power Distribution Center......... 8W-39-2, 7, 8
Remote Keyless Module.............. 8W-39-11
Right Liftgate Ajar Switch............. 8W-39-4
Right Rear Door Lock Motor/Ajar Switch . . 8W-39-5
Sentry Key Immobilizer Module......... 8W-39-9
WJ8W-39 VEHICLE THEFT SECURITY SYSTEM 8W - 39 - 1

8W-40 INSTRUMENT CLUSTER
Component Page
Airbag Control Module.............. 8W-40-4, 5
Body Control Module....... 8W-40-2, 4, 5, 6, 7, 10
Combination Flasher................. 8W-40-3
Controller Antilock Brake...... 8W-40-4, 5, 6, 7, 9
Data Link Connector.............. 8W-40-2, 4, 5
Diagnostic Junction Port . . 8W-40-4, 5, 6, 7, 8, 9, 10
Engine Control Module......... 8W-40-4, 5, 9, 10
Fuse 17............................ 8W-40-2Component Page
Fuse 22.......................... 8W-40-2, 3
G200............................ 8W-40-2, 3
Instrument Cluster . . 8W-40-2, 3, 4, 5, 6, 7, 8, 9, 10
Junction Block.................... 8W-40-2, 3
Park Brake Switch................. 8W-40-6, 7
Powertrain Control Module . . 8W-40-4, 5, 6, 7, 8, 10
Transmission Control Module........... 8W-40-4
Vehicle Information Center............. 8W-40-7
WJ8W-40 INSTRUMENT CLUSTER 8W - 40 - 1

8W-42 AIR CONDITIONING-HEATER
Component Page
A/C Compressor Clutch.............. 8W-42-3, 4
A/C Compressor Clutch Relay......... 8W-42-3, 4
A/C Pressure Transducer........ 8W-42-11, 12, 13
Auto Shut Down Relay.......... 8W-42-4, 11, 12
Automatic Zone Control Module . 8W-42-2, 5, 6, 7, 8
Blower Motor................... 8W-42-2, 6, 9
Blower Motor Controller............. 8W-42-2, 6
Blower Motor Resistor Block............ 8W-42-9
Body Control Module........... 8W-42-5, 6, 9, 10
Diagnostic Junction Port............... 8W-42-5
Driver Blend Door Motor/Actuator..... 8W-42-7, 8
Engine Control Module............. 8W-42-4, 13
Fuse 1......................... 8W-42-2, 6, 9
Fuse 7............................. 8W-42-6
Fuse 11......................... 8W-42-5, 10
Fuse 16...................... 8W-42-4, 11, 12
Fuse 20......................... 8W-42-2, 10
Fuse 21.......................... 8W-42-3, 4Component Page
G104.............................. 8W-42-3
G108.......................... 8W-42-11, 12
G200......................... 8W-42-2, 6, 10
Glow Plug Relay No. 1................ 8W-42-4
Hydraulic Cooling Module.......... 8W-42-11, 12
Junction Block.............. 8W-42-2, 3, 5, 6, 10
Manual Temperature Control...... 8W-42-2, 9, 10
Mode Door Motor/Actuator........... 8W-42-7, 8
Oxygen Sensor Downstream Relay . . . 8W-42-11, 12
Passenger Blend Door Motor/Actuator . . 8W-42-7, 8
Power Distribution
Center............. 8W-42-2, 3, 4, 6, 9, 11, 12
Powertrain Control Module....... 8W-42-3, 11, 12
Rear Window Defogger............. 8W-42-5, 10
Rear Window Defogger Relay........ 8W-42-5, 10
Recirculation Door Motor/Actuator..... 8W-42-7, 8
Temperature Valve Actuator........... 8W-42-10
Viscous/Cabin Heater Relay............ 8W-42-4
WJ8W-42 AIR CONDITIONING-HEATER 8W - 42 - 1

Component Page
DRIVER SEAT BELT SWITCH........ 8W-80-74
DRIVER SIDE IMPACT SENSOR...... 8W-80-74
EGR SOLENOID (DIESEL)........... 8W-80-74
ELECTRIC BRAKE
(EXCEPT BUILT-UP-EXPORT)...... 8W-80-74
ELECTRONIC SPEED CONTROL
SERVO ......................... 8W-80-74
ENGINE CONTROL MODULE C1
(DIESEL)....................... 8W-80-75
ENGINE CONTROL MODULE C2
(DIESEL)....................... 8W-80-76
ENGINE COOLANT TEMPERATURE
SENSOR (DIESEL)................ 8W-80-77
ENGINE COOLANT TEMPERATURE
SENSOR (GAS)................... 8W-80-77
ENGINE OIL PRESSURE
SENSOR (DIESEL)................ 8W-80-77
ENGINE OIL PRESSURE
SENSOR (GAS)................... 8W-80-78
EVAP/PURGE SOLENOID (GAS)....... 8W-80-78
FRONT POWER OUTLET............ 8W-80-78
FRONT WASHER PUMP............. 8W-80-78
FRONT WIPER MOTOR............. 8W-80-78
FUEL INJECTOR NO. 1 (DIESEL)..... 8W-80-79
FUEL INJECTOR NO. 1 (GAS)........ 8W-80-79
FUEL INJECTOR NO. 2 (DIESEL)..... 8W-80-79
FUEL INJECTOR NO. 2 (GAS)........ 8W-80-79
FUEL INJECTOR NO. 3 (DIESEL)..... 8W-80-79
FUEL INJECTOR NO. 3 (GAS)........ 8W-80-80
FUEL INJECTOR NO. 4 (DIESEL)..... 8W-80-80
FUEL INJECTOR NO. 4 (GAS)........ 8W-80-80
FUEL INJECTOR NO. 5 (DIESEL)..... 8W-80-80
FUEL INJECTOR NO. 5 (GAS)........ 8W-80-81
FUEL INJECTOR NO. 6 (GAS)........ 8W-80-81
FUEL INJECTOR NO. 7 (4.7L)........ 8W-80-81
FUEL INJECTOR NO. 8 (4.7L)........ 8W-80-81
FUEL PRESSURE SENSOR (DIESEL) . . 8W-80-82
FUEL PRESSURE SOLENOID
(DIESEL)....................... 8W-80-82
FUEL PUMP MODULE (GAS)......... 8W-80-82
FUEL TANK MODULE (DIESEL)...... 8W-80-82
GENERATOR (DIESEL).............. 8W-80-82
GENERATOR (GAS)................. 8W-80-83
GLOVE BOX LAMP................. 8W-80-83
HEADLAMP LEVELING SWITCH
(BUILT-UP-EXPORT).............. 8W-80-83
HOOD AJAR SWITCH
(BUILT-UP-EXPORT).............. 8W-80-83
HORN NO. 1....................... 8W-80-83
HORN NO. 2....................... 8W-80-84
HYDRAULIC COOLING MODULE..... 8W-80-84
IDLE AIR CONTROL MOTOR......... 8W-80-84
IGNITION SWITCH C1.............. 8W-80-84
IGNITION SWITCH C2.............. 8W-80-84
INPUT SPEED SENSOR (4.7L)........ 8W-80-85Component Page
INSTRUMENT CLUSTER............ 8W-80-85
INTAKE AIR TEMPERATURE
SENSOR (DIESEL)................ 8W-80-85
INTAKE AIR TEMPERATURE
SENSOR (GAS)................... 8W-80-85
INTAKE PORT SWIRL ACTUATOR
(DIESEL)....................... 8W-80-86
INTRUSION TRANSCEIVER MODULE
(BUILT-UP-EXPORT).............. 8W-80-86
JUNCTION BLOCK BODY
CONTROL MODULE.............. 8W-80-86
JUNCTION BLOCK C1.............. 8W-80-87
JUNCTION BLOCK C2 (LHD)......... 8W-80-88
JUNCTION BLOCK C2 (RHD)......... 8W-80-89
JUNCTION BLOCK C3.............. 8W-80-90
JUNCTION BLOCK C4.............. 8W-80-91
JUNCTION BLOCK C5.............. 8W-80-91
KNOCK SENSOR................... 8W-80-91
LEAK DETECTION PUMP (EXCEPT
BUILT-UP-EXPORT)............... 8W-80-91
LEFT COURTESY LAMP............. 8W-80-91
LEFT DOOR HANDLE COURTESY
LAMP.......................... 8W-80-92
LEFT FOG LAMP................... 8W-80-92
LEFT FRONT DOOR SPEAKER....... 8W-80-92
LEFT FRONT IMPACT SENSOR....... 8W-80-92
LEFT FRONT PARK LAMP........... 8W-80-92
LEFT FRONT PARK/TURN SIGNAL LAMP
(EXCEPT BUILT-UP-EXPORT)...... 8W-80-93
LEFT FRONT SIDE MARKER LAMP
(EXCEPT BUILT-UP-EXPORT)...... 8W-80-93
LEFT FRONT TURN SIGNAL LAMP
(BUILT-UP-EXPORT).............. 8W-80-93
LEFT FRONT WHEEL SPEED
SENSOR........................ 8W-80-93
LEFT HEADLAMP LEVELING MOTOR
(BUILT-UP-EXPORT).............. 8W-80-94
LEFT HIGH BEAM HEADLAMP....... 8W-80-94
LEFT INSTRUMENT PANEL SPEAKER . 8W-80-94
LEFT LIFTGATE AJAR SWITCH....... 8W-80-94
LEFT LOW BEAM HEADLAMP....... 8W-80-94
LEFT MULTI-FUNCTION SWITCH.... 8W-80-95
LEFT REAR DOOR LOCK
MOTOR/AJAR SWITCH............ 8W-80-95
LEFT REAR DOOR SPEAKER......... 8W-80-95
LEFT REAR LAMP ASSEMBLY........ 8W-80-95
LEFT REAR WHEEL SPEED
SENSOR........................ 8W-80-96
LEFT REMOTE RADIO SWITCH...... 8W-80-96
LEFT SIDE REPEATER LAMP
(BUILT-UP-EXPORT).............. 8W-80-96
LEFT VISOR/VANITY LAMP.......... 8W-80-96
LICENSE LAMP NO. 1.............. 8W-80-96
LICENSE LAMP NO. 2.............. 8W-80-97
LIFTGATE FLIP-UP AJAR SWITCH.... 8W-80-97
WJ8W-80 CONNECTOR PIN-OUT 8W - 80 - 3

BOOST PRESSURE SENSOR (DIESEL) - BLACK 3 WAY
CAV CIRCUIT FUNCTION
1 K4 20BK/LB SENSOR GROUND
2 Y53 20BK/YL BOOST PRESSURE SENSOR SIGNAL
3 K6 20VT/WT SENSOR REFERENCE VOLTAGE B
BRAKE LAMP SWITCH - GRAY 6 WAY
CAV CIRCUIT FUNCTION
1 K29 18WT/PK SECONDARY BRAKE SWITCH SIGNAL
2 Z238 18BK (LHD) GROUND
2 Z243 18BK (RHD) GROUND
3 V32 22OR/DG (GAS) SPEED CONTROL POWER SUPPLY
4 V30 22DB/RD (GAS) SPEED CONTROL BRAKE SWITCH OUTPUT
5 L50 20VT/TN (LHD) PRIMARY BRAKE SWITCH SIGNAL
5 L50 20WT/TN (RHD) PRIMARY BRAKE SWITCH SIGNAL
6 F32 20PK/DB FUSED B(+)
C100 - BLACK (RIGHT HEADLAMP AND DASH
SIDE)
CAV CIRCUIT
1 T40 12LG
2 K125 18WT/DB
3 K20 18DG
C100 - BLACK (BATTERY SIDE)
CAV CIRCUIT
1 T40 12LG
2 K125 18WT/DB
3 K20 18DG
C101 (4.0L RHD) - LT. GRAY (ENGINE SIDE)
CAV CIRCUIT
1 B22 18DG/YL
2 K99 18BR/OR
3 K299 18BR/WT
4 K6 18VT/BK
5 C18 18DB
6-
8W - 80 - 12 8W-80 CONNECTOR PIN-OUTWJ

C101 (4.0L RHD) - LT. GRAY (HEADLAMP AND
DASH SIDE)
CAV CIRCUIT
1 B22 18DG/YL
2 K99 18LB/OR
3 K299 18BR/WT
4 K6 18VT/BK
5 C18 18DB
6-
C101 (4.7L RHD) - BLACK (ENGINE SIDE)
CAV CIRCUIT
1 K4 18BK/LB (HIGH OUTPUT)
2 K99 18BR/OR
3 C18 18DB
4 K299 18BR/WT
5 T6 18VT/WT
6 K6 18VT/BK
7 K4 18BK/LB (HIGH OUTPUT)
8 K142 18GY/BK (HIGH OUTPUT)
9 T10 18YL/DG
10 -
11 -
12 B22 18DG/YL
13 -
14 K42 18DB/LG (HIGH OUTPUT)
C101 (4.7L RHD) - BLACK (LEFT HEADLAMP
AND DASH SIDE)
CAV CIRCUIT
1 K4 18BK/LB
2 K99 18BR/OR
3 C18 18DB
4 K299 18BR/WT
5 T6 18OR/WT
6 K6 18VT/BK
7 K4 18BK/LB
8 K142 18GY/BK
9 T10 18YL/DG
10 -
11 -
12 B22 18DG/YL
13 -
14 K42 18DB/LG
WJ8W-80 CONNECTOR PIN-OUT 8W - 80 - 13

C102 (DIESEL) - BLACK (LEFT HEADLAMP AND
DASH SIDE)
CAV CIRCUIT
1 D21 18PK
2 D25 18VT/YL
3 K226 18DB/WT
4 D52 18LG/VT
5 D51 18DG/WT
6 B22 18DG/YL
7 F991 20OR/DB
8 T752 18DG/OR
9 K236 18GY/PK
10 K132 18BR/PK
11 A82 18PK/LG
12 K152 18WT
13 L50 18WT/TN
14 K29 18WT/PK
C102 (DIESEL) - BLACK (ENGINE SIDE)
CAV CIRCUIT
1 D21 20PK
2 D25 20VT/YL
3 K226 20DB/WT
4 D52 16DG/WT
5 D51 16WT
6 B22 20DG/YL
7 F991 20RD/DB
8 T752 20DG/RD
9 K236 20GY/PK
10 K132 20BR/PK
11 A82 16PK/DG
12 K152 20WT
13 L50 20WT/DB
14 K29 20WT/PK
C102 (GAS RHD) - BLACK (RIGHT HEADLAMP
AND DASH SIDE)
CAV CIRCUIT
1 A30 14RD/WT (4.7L)
2 F991 20OR/DB
3 K173 18LG
4 F42 18DG/LG
5 A7 14RD/BK
6 L1 18VT/BK
7 Z306 20BK/LG
8 T41 18BK/WT
9-
10 K4 20BK/LB
11 K200 18VT/OR (4.7L)
12 C2 18DB/YL
13 -
14 A142 14DG/OR
8W - 80 - 14 8W-80 CONNECTOR PIN-OUTWJ

C102 (GAS RHD) - BLACK (ENGINE SIDE)
CAV CIRCUIT
1 A30 14RD/WT (4.7L)
2 F991 18OR/DB
3 K173 18LG
4 F42 18DG/LG
5 A7 14RD/BK
6 L1 18VT/BK
7 Z306 20BK/LG
8 T41 18BK/WT
9-
10 K4 18BK/LB
11 K200 18VT/OR (4.7L)
12 C2 18DB/YL
13 -
14 A142 14DG/OR
C103 (DIESEL) - GRAY (LEFT HEADLAMP AND
DASH SIDE)
CAV CIRCUIT
1 T41 18BK/WT
2 K173 18LG
3 C2 18DB/PK
4-
5 F142 14OR/DG
6 K51 18DB/YL
7 K25 18VT/LG
8 Y42 18OR/DB
9 C18 18DB
10 K4 20BK/LB
11 K6 18VT/WT
12 -
13 T40 12BR
14 F15 18DB/WT
C103 (DIESEL) - GRAY (ENGINE SIDE)
CAV CIRCUIT
1 T41 20BK/WT
2 K173 20GY
3 C3 14DB/BK
4-
5 F142 16RD/DG
6 K51 20DB/YL
7 K25 20VT/DG
8 Y42 20RD/DB
9 C18 20DB
10 K4 16BK/LB
11 K6 16VT/WT
12 -
13 T40 12DG
14 F15 20DB/WT
WJ8W-80 CONNECTOR PIN-OUT 8W - 80 - 15