2003 JEEP GRAND CHEROKEE 4.7 v8 engine

(4) Lift accelerator cable from top of cable cam
(Fig. 2).
(5) Press tab (Fig. 3) to release plastic cable mount
from bracket.Press on tab only enough to
release cable from bracket. If tab is pressed too
much, it will be broken.Slide plastic mount (Fig.
3) towards passenger side of vehicle to remove cable
from bracket.
(6) Using finger pressure only, disconnect speed
control cable connector at throttle body bellcrank pin
by pushing connector off bellcrank pin towards front
of vehicle (Fig. 2).DO NOT try to pull connector
off perpendicular to the bellcrank pin. Connec-
tor will be broken.
(7) Slide speed control cable plastic mount towards
passenger side of vehicle to remove cable from
bracket (Fig. 4).
(8) Remove servo cable from servo. Refer to Speed
Control Servo Removal/Installation.
INSTALLATION
INSTALLATION - 4.0L
(1) Install end of cable to speed control servo.
Refer to Speed Control Servo Removal/Installation.
(2) Install cable into mounting bracket (snaps in).
(3) Install speed control cable connector at throttle
body bellcrank pin (snaps on).
(4) Connect negative battery cable at battery.
(5) Before starting engine, operate accelerator
pedal to check for any binding.
INSTALLATION - 4.7L
(1) Install end of cable to speed control servo.
Refer to Speed Control Servo Removal/Installation.
(2) Slide speed control cable plastic mount into
bracket.
(3) Install speed control cable connector onto throt-
tle body bellcrank pin (snaps on).
(4) Slide accelerator cable plastic mount into
bracket. Continue sliding until tab (Fig. 3) is aligned
to hole in mounting bracket.
(5) Route accelerator cable over top of cable cam
(Fig. 2).
(6) Install accelerator cable connector onto throttle
body bellcrank pin (snaps on).
(7) Install air box housing to throttle body.
Fig. 2 Cable Connectors at Bell CrankÐ4.7L V-8
Engine
1 - THROTTLE BODY
2 - SPEED CONTROL CABLE CONNECTOR
3 - OFF
4 - OFF
5 - ACCELERATOR CABLE CONNECTOR
6 - CABLE CAM
7 - BELLCRANK
Fig. 3 Accelerator Cable Release TabÐ4.7L V-8
Engine
1 - ACCELERATOR CABLE
2 - PLASTIC CABLE MOUNT
3 - PRESS TAB FOR REMOVAL
4 - CABLE BRACKET
5 - SLIDE FOR REMOVAL
8P - 4 SPEED CONTROLWJ
CABLE (Continued)

(8) Connect negative battery cable at battery.
(9) Before starting engine, operate accelerator
pedal to check for any binding.
SERVO
DESCRIPTION
The servo unit consists of a solenoid valve body,
and a vacuum chamber. The solenoid valve body con-
tains three solenoids:
²Vacuum
²Vent
²Dump
The vacuum chamber contains a diaphragm with a
cable attached to control the throttle linkage.
OPERATION
The Powertrain Control Module (PCM) controls the
solenoid valve body. The solenoid valve body controls
the application and release of vacuum to the dia-
phragm of the vacuum servo. The servo unit cannot
be repaired and is serviced only as a complete assem-
bly.
Power is supplied to the servo's by the PCM
through the brake switch. The PCM controls the
ground path for the vacuum and vent solenoids.The dump solenoid is energized anytime it receives
power. If power to the dump solenoid is interrupted,
the solenoid dumps vacuum in the servo. This pro-
vides a safety backup to the vent and vacuum sole-
noids.
The vacuum and vent solenoids must be grounded
at the PCM to operate. When the PCM grounds the
vacuum servo solenoid, the solenoid allows vacuum
to enter the servo and pull open the throttle plate
using the cable. When the PCM breaks the ground,
the solenoid closes and no more vacuum is allowed to
enter the servo. The PCM also operates the vent sole-
noid via ground. The vent solenoid opens and closes a
passage to bleed or hold vacuum in the servo as
required.
The PCM duty cycles the vacuum and vent sole-
noids to maintain the set speed, or to accelerate and
decelerate the vehicle. To increase throttle opening,
the PCM grounds the vacuum and vent solenoids. To
decrease throttle opening, the PCM removes the
grounds from the vacuum and vent solenoids. When
the brake is released, if vehicle speed exceeds 30
mph to resume, 35 mph to set, and the RES/ACCEL
switch has been depressed, ground for the vent and
vacuum circuits is restored.
REMOVAL
The speed control servo is attached to a bracket.
The bracket and servo assembly are located below
the battery tray.
(1) Disconnect negative battery cable at battery.
(2) Disconnect positive battery cable at battery.
(3) Remove air cleaner housing at top of throttle
body and disconnect servo cable at throttle body.
Refer to Servo Cable Removal/Installation.
(4) Remove battery from battery tray.
(5) Disconnect wiring at battery tray.
(6) Disconnect positive battery cable at Power Dis-
tribution Center (PDC).
(7) Loosen PDC at battery tray.
(8) Remove 4 battery tray bolts. One of these bolts
attaches to speed control bracket flange that sup-
ports battery tray. While removing battery tray, dis-
connect battery temperature sensor electrical
connector at sensor.
(9) Disconnect vacuum line at servo vacuum hose
fitting (Fig. 5) .
(10) Disconnect electrical connector at servo (Fig.
5) .
If servo and mounting bracket are being removed
as one assembly, remove two mounting nuts (Fig. 5) .
These are located above right-front tire. Remove
inner fender clips and pry inner fender back slightly
to gain access to mounting nuts.
Fig. 4 Speed Control Cable at BracketÐ4.7L V-8
Engine
1 - PLASTIC CABLE MOUNT
2 - SPEED CONTROL CABLE
3 - BRACKET
4 - SLIDE FOR REMOVAL
WJSPEED CONTROL 8P - 5
CABLE (Continued)

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

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

C103 (GAS) - GRAY (RIGHT HEADLAMP AND DASH SIDE)
CAV CIRCUIT
1 F22 20WT/PK (EXCEPT 4.7L RHD)
1 F22 18WT/TN (4.7L RHD)
2 T6 18OR/WT (4.7L LHD)
2 C18 20DB (4.0L LHD BUILT-UP-EXPORT)
2 C18 18DB (4.0L EXCEPT BUILT-UP-EXPORT)
3 D20 20LG (4.7L LHD)
3 D20 18LG (4.7L RHD)
4 D21 20PK (4.7L LHD)
4 K299 18BR/WT (4.0L LHD)
4 D21 18PK (4.7L RHD)
5 B22 18DG/YL (LHD)
6 K20 18DG
7 K30 20PK (4.0L RHD)
7 K30 18PK/YL (4.7L RHD)
7 K30 20PK/YL (LHD)
8 A142 14DG/OR (4.0L LHD)
8 T10 18DG/LG (4.7L LHD)
9 T16 14RD (4.7L LHD)
10 D25 18VT/YL (4.7L RHD)
10 D25 18VT/YL (4.7L EXCEPT BUILT-UP-EXPORT)
10 D25 20VT/YL (4.7L LHD BUILT-UP-EXPORT)
11 Z305 20BK/OR
12 F45 18YL/RD (4.7L RHD)
12 T15 18YL/BR (4.0L)
12 F45 18YL/RD (4.7L EXCEPT BUILT-UP-EXPORT)
12 F45 20YL/RD (4.7L LHD BUILT-UP-EXPORT)
13 K6 18VT/BK (4.0L LHD)
14 F142 18OR/DG
C103 (GAS) - GRAY (ENGINE SIDE)
CAV CIRCUIT
1 F22 18WT/PK
2 C18 18DB (4.0L LHD)
2 K200 18VT/OR (4.7L RHD)
3 K99 18BR/OR (4.0L LHD)
3 D20 18LG (4.7L RHD)
4 K299 18BR/WT (4.0L BUILT-UP-EXPORT)
4 D21 18PK (4.7L RHD)
5 B22 18DG/YL (4.0L LHD)
6 K20 18DG
7 K30 18PK/YL
8 A142 14DG/OR (4.0L LHD)
9 T16 14RD (4.7L)
10 D25 18WT/VT (4.7L)
11 Z305 20BK/OR
12 T15 18LG (4.0L LHD)
12 F45 18YL/RD (4.7L)
13 K6 18VT/BK (4.0L LHD)
13 K199 18DB/WT (4.7L LHD)
14 F142 18OR/DG
8W - 80 - 16 8W-80 CONNECTOR PIN-OUTWJ

C104 - LT. GRAY (RIGHT HEADLAMP AND DASH SIDE)
CAV CIRCUIT
1 K200 18VT/OR (4.0L EXCEPT BUILT-UP-EXPORT)
1 K4 18BK/LB (4.7L HIGH OUTPUT)
2 K99 18BR/OR (4.7L)
2 F991 20OR/DB (4.0L)
3 K173 18LG (4.0L)
4 F42 18DG/LG (4.0L)
5 A7 14RD/BK (4.0L)
5 K4 18BK/LB (4.7L HIGH OUTPUT)
6 L1 18VT/BK (4.0L)
6 K142 18GY/BK (4.7L HIGH OUTPUT)
7 Z306 20BK/LG (4.0L)
7 K299 18BR/WT (4.7L)
8 C18 18DB (4.7L)
8 T41 18BK/WT (4.0L)
9 K6 18VT/BK (4.7L)
9 C2 18DB/YL (4.0L)
10 K4 18BK/LB (4.0L)
10 K42 18DB/LG (4.7L HIGH OUTPUT)
C104 - LT. GRAY (ENGINE SIDE)
CAV CIRCUIT
1 K200 18VT/OR (EXCEPT 4.0L BUILT-UP-EXPORT)
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 C2 18DB/YL
10 K4 18BK/LB
C105 (DIESEL) - GRAY (LEFT HEADLAMP AND DASH SIDE)
CAV CIRCUIT
1 C13 18DB/OR
2 F300 18RD/BK
3 V37 18RD/LG
4 Z305 20BK/OR
5 Z306 20BK/LG
6 L1 18VT/BK
7-
8-
9-
10 -
11 -
12 -
13 -
14 -
WJ8W-80 CONNECTOR PIN-OUT 8W - 80 - 17