relay CHRYSLER CARAVAN 2005 Service Manual

CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
Engine Coolant Temp Sensor
(Gas)BK On Cylinder Block N/S
Engine Oil Pressure Sensor
(Diesel)BK Rear of Engine 16
Engine Coolant Temp Sensor
(Diesel)BL On Cylinder Block 15
Engine Oil Pressure Switch (Gas) LTGN On Cylinder Block 12, 18
Engine Starter Motor At Starter Motor 13, 15, 18
EVAP/Purge Solenoid (Gas) BK Right Motor Mount 10, 17
Evaporator Temperature Sensor BK Right Side of HVAC N/S
Floor Console Lamp BK At Lamp N/S
Floor Console Power Outlet RD At Front Console N/S
Front Blower Module C1 (ATC) BK On HVAC N/S
Front Blower Module C2 (ATC) BK On HVAC N/S
Front Cigar Lighter RD/NAT Rear of Lighter 20, 23, 25
Front Control Module BK In Integrated Power Module N/S
Front Intrusion Sensor (United
Kingdom)BK At Sensor N/S
Front Reading Lamps/Switch BK At Switch N/S
Fuel Heater (Diesel) BK Left Rear Engine Compartment N/S
Fuel Injector No.1 (2.4L/3.3L/
3.8L)BK At Fuel Injector N/S
Fuel Injector No.1 (Diesel) BK At Fuel Injector 15
Fuel Injector No.2 (2.4L/3.3L/
3.8L)BK At Fuel Injector N/S
Fuel Injector No.2 (Diesel) BK At Fuel Injector 15
Fuel Injector No.3 (2.4L/3.3L/
3.8L)BK At Fuel Injector N/S
Fuel Injector No.3 (Diesel) BK At Fuel Injector 15
Fuel Injector No.4 (2.4L/3.3L/
3.8L)BK At Fuel Injector N/S
Fuel Injector No.4 (Diesel) BK At Fuel Injector 15
Fuel Injector No.5 (3.3L/3.8L) BK At Fuel Injector N/S
Fuel Injector No.6 (3.3L/3.8L) BK At Fuel Injector N/S
Fuel Pressure Sensor (Diesel) BK Top Left of Engine 15
Fuel Pressure Solenoid (Diesel) Right Front Engine 15
Fuel Pump Module LTGY Side of Fuel Tank 34
Generator BK Rear of Generator 11, 15, 17, 18
Glow Plug No.1 (Diesel) Top of Engine N/S
Glow Plug No.2 (Diesel) Top of Engine 15
Glow Plug No.3 (Diesel) Top of Engine 15
Glow Plug No.4 (Diesel) Top of Engine 15
Glow Plug Relay (Diesel) BK Near Transmission 15, 16
Hands Free Module C1 Instrument Panel N/S
RS8W-91 CONNECTOR/GROUND/SPLICE LOCATION8W-91-5
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
Passenger Door Courtesy Lamp GY At Lamp 44
Passenger Door Lock Switch BK At Switch 44
Passenger Folding Mirror Relay
(Export)BL Left Kick Panel 7
Passenger Heated Seat Back GN At Seat N/S
Passenger Heated Seat Cushion BK At Seat N/S
Passenger Heated Seat Module GY At Heated Seat N/S
Passenger Power Seat Front
Riser MotorRD Under Seat N/S
Passenger Power Seat Horizontal
MotorBK Under Seat N/S
Passenger Power Seat Rear
Riser MotorRD Under Seat N/S
Passenger Power Seat Recliner
MotorGN Under Seat N/S
Passenger Power Seat Switch GN At Switch N/S
Passenger Power Window Motor RD At Motor 44
Passenger Power Window Switch BK At Switch 44
Passenger Seat Belt Switch
(Occupant Sensing)YL On Seat Harness N/S
Passenger Seat Belt Tensioner On Seat Harness N/S
Passenger Seat Weight Sensor BK Passenger Seat N/S
Power Folding Mirror Switch
(Export)BK Near Steering Column 31
Power Liftgate Module C1 BK Left Quarter 46, 47
Power Liftgate Module C2 Left Quarter 46, 47
Power Liftgate Motor BK Left Quarter 47
Power Mirror Switch BK Rear of Switch 30
Power Outlet (Except Lowline) BK Instrument Panel 20, 23, 25
Power Seat Circuit Breaker GY Under Seat N/S
Powertrain Control Module C1 BK Left Front Engine Compartment 11
Powertrain Control Module C2 OR Left Front Engine Compartment 11
Powertrain Control Module C3 NAT Left Front Engine Compartment 11
Powertrain Control Module C4 GN Left Front Engine Compartment 11
Power Window Circuit Breaker GY Left Side Kick Panel 41 42
Radiator Fan No.1 (Gas) BK Left Side At Motor 1
Radiator Fan No.1 (Diesel) GY Left Side At Motor 1
Radiator Fan No.2 (Gas) BK Right Side At Motor 1, 2
Radiator Fan No.2 (Diesel) GY Right Side At Motor 1, 2
Radiator Fan Relay (Gas) Top of Left Front Frame Rail 1
Radiator Fan Relay No. 1
(Diesel)BL Left Front Engine Compartment 2
Radiator Fan Relay No. 2
(Diesel)BL Left Front Engine Compartment 2
RS8W-91 CONNECTOR/GROUND/SPLICE LOCATION8W-91-9
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
Radiator Fan Relay No. 3
(Diesel)BL Left Front Engine Compartment 2
Radio C1 Rear of Radio 20
Radio C2 (CD Changer) Rear of Radio 20
Radio C2 (DVD/CD Changer) Rear of Radio 20
Radio C2 (Hands Free) Rear of Radio 20
Rear A/C-Heater Unit (3 Zone
MTC)LTGN Right Quarter Panel NS
Rear Auto Temp Control Switch
(3 Zone ATC)BK Rear of Switch 50
Rear Blower Front Control Switch
(3 Zone MTC)BK Rear of Switch N/S
Rear Blower Motor Power Module
C1 (3 Zone ATC)RD/BK Right Quarter N/S
Rear Blower Motor Power Module
C2 (3 Zone ATC)BK Right Quarter N/S
Rear Blower Rear Control Switch
C1 (3 Zone MTC)BK Overhead 50
Rear Blower Rear Control Switch
C2 (3 Zone MTC)BK Overhead 50
Rear Dome Lamp (Except
Luxury)GY At Lamp N/S
Rear Intrusion Sensor (United
Kingdom)At Sensor N/S
Rear Mode Motor (3 Zone ATC) GY At Motor N/S
Rear Park Assist Display Module Overhead Console N/S
Rear Park Assist Module Left Quarter Panel 47
Rear Power Outlet GY Left Quarter Panel 47
Rear Temperature Motor (3 Zone
ATC)GY Right Quarter N/S
Rear View Mirror C1 BK At Mirror NS
Rear View Mirror C2 At Mirror N/S
Rear Window Defogger C1 Right Side of Liftgate 49
Rear Window Defogger C2 Left Side of Liftgate 49
Rear Wiper Motor At Motor 49
Recirculation Door Actuator GY Right Side of HVAC N/S
Right B-Pillar Switch (Power
Sliding Door)GY Right B Pillar 39
Right Cinch/Release Motor
(Power Sliding Door)GY Right Sliding Door 45
Right Curtain Airbag Squib Rear of Right Roof Rail 48
Right Cylinder Lock Switch
(Export)BK Right Front Door 44
Right Door Speaker At Speaker N/S
Right Fog Lamp WT At Lamp 3
8W - 91 - 10 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONRS
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
Right Sliding Door Motor BK At Sliding Door 45
Right Speed Control Switch WT At Steering Wheel N/S
Right Turn Signal Lamp (Export) OR At Lamp N/S
Right Visor/Vanity Lamp BK At Lamp N/S
Sentry Key Remote Entry Module
(SKREEM)BK At Steering Column 20, 21, 22, 23, 31
Siren (United Kingdom) BK Left Front Body N/S
Speed Control Servo (Gas) BK Near Controller Antilock Brake 11, 17, 18
Sunroof Module (Except Export) BK At Sunroof N/S
Sunroof Switch (Except Export) NAT Near Overhead Console N/S
Thatcham Alarm Module (United
Kingdom)BK Top Right Side of Instrument Panel
Near SpeakerN/S
Throttle Position Sensor (Gas) GY On Throttle Body 10, 11, 17
Traction Control Switch BK Rear of Swtich 21, 22, 31
Trailer Tow Connector (Except
Export)Left Quarter Panel N/S
Transmission Control Relay
(Diesel)Near Transmission 16
Transmission Range Sensor DKGY Top of Transmission 14, 19
Transmission Solenoid/Pressure
Switch AssemblyBK Side of Transmission 14, 19
Vehicle Speed Sensor (MTX) BK Rear of Transmission 16
Washer Fluid Level Switch BK Bottom of Reservoir 3
Washer Pump Motor BK Right Fender Well 3
Water in Fuel Sensor (Diesel) BK Left Rear Engine Compartment N/S
Wiper Module DKGY Left Side Cowl 6
GROUNDS
GROUND NUMBER LOCATION FIG.
G100 Body Ground Near Powertrain Control Module N/S
G101 Above Starter 13, 15, 18
G102 Left Headlamp Area 1
G103 Above Starter 15
G200 Left Side of Instrument Panel 20, 21 29
G201 Right Side of Instrument Panel 20, 24, 29
G202 Near Radio N/S
G300 Left B Pillar 32
G301 Right B Pillar 33, 39
G302 Left Rear Quarter 47
G303 Liftgate Ground 49
8W - 91 - 12 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONRS
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

SPLICES
SPLICE NUMBER LOCATION FIG.
S101 (Gas) Near T/O for Radiator Fan No.1 1
S103 (Diesel) Between T/O for Battery Temperature Sensor and T/O
for C10215
S106 (2.5L) Near T/O for Battery Temperature Sensor 15
S106 (3.3L/3.8L) Near T/O for G103 18
S107 (Gas) Near T/O for Integrated Power Module C3 11
S107 (Diesel) In T/O for Integrated Power Module C3 7
S111 (2.4L) Near T/O for C101 11
S111 (Diesel) In T/O for Battery (-) N/S
S111 (3.3L/3.8L) Near T/O for Battery Temperature Sensor N/S
S112 (Gas) Near T/O for Integrated Power Module - C3 19, 5, 11
S113 (2.4L) Near T/O for Park/Neutral Position Switch 11
S114 (2.4L) Near T/O for Powertrain Control Module C4 11
S114 (3.3L/3.8L) In T/O to Transmission Control Module N/S
S115 (2.4L) Near T/O for Powertrain Control Module C4 11
S115 (3.3L/3.8L) In T/O to Transmission Control Module N/S
S116 (2.4L) 180mm from T/O for Torque Converter Clutch Solenoid 11, 13
S116 (Diesel) Near T/O for Mass Air Flow Sensor 16
S116 (3.3L/3.8L) Near T/O for G103 18
S118 (2.4L) Near T/O for Knock Sensor 11, 13
S119 (Diesel) Near T/O for Engine Starter Motor 15
S121 (3.3L/3.8L) Near T/O for Output Speed Sensor 18
S122 (2.4L) In T/O to Engine Starter Motor 13
S122 (3.3L/3.8L) In T/O to Engine Starter Motor 18
S124 (2.4L) Near T/O for Fuel Injector No.2 N/S
S124 (3.3L/3.8L) Near T/O for Fuel Injector No.5 and No.6 N/S
S125 (2.4L) In T/O for Manifold Absolute Pressure Sensor N/S
S126 In Right Headlamp Leveling Assembly N/S
S127 (Diesel) In T/O for Engine Starter Motor N/S
S128 (Diesel) Near T/O for Engine Starter Motor N/S
S129 (Diesel) Near T/O for Battery (+) N/S
S130 (Diesel) Near T/O for Battery (+) N/S
S131 (2.4L) Near T/O for Transmission Control Module 11
S131 (3.3L/3.8L) Near T/O for C110 N/S
S132 (Diesel) Near T/O for Battery (+) N/S
S134 (Diesel) IN T/O for Engine Control Module N/S
S135 (Diesel) Near T/O for Glow Plug No.2 N/S
S136 (Diesel) In T/O for Radiator Fan Relays 2
S137 (Diesel) Above Starter 15
S138 (Diesel) Between T/O for Radiator Fan No.2 and T/O for G102 N/S
RS8W-91 CONNECTOR/GROUND/SPLICE LOCATION8W-91-13
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

SPLICE NUMBER LOCATION FIG.
S139 (Diesel) Between T/O for Engine Starter Motor and T/O for
Engine Control Module C115, 16
S141 (2.4L) Near T/O for Controller Anti-Lock Brake 11
S141 (3.3L/3.8L ABS Except
Export)Near T/O for G100 N/S
S141 (Diesel) Near T/O for G100 N/S
S141 (3.3L/3.8L) Near T/O for Powertrain Control Module N/S
S142 (3.3L/3.8L) Near T/O for A/C Compressor Clutch 18
S144 (Diesel) Between T/O for Battery Temperature Sensor and T/O
for C103N/S
S148 (Diesel) Near T/O for Engine Starter Motor 5
S150 (Diesel) Near T/O for Controller Anti-Lock Brake N/S
S151 (Diesel) Near T/O for Radiator Fan Relays 2
S152 (Diesel) Near T/O for Radiator Fan No.1 N/S
S157 (Diesel) Near T/O for Glow Plug No.4 15
S177 In Right Headlamp Wiring Assembly N/S
S179 In Left Headlamp Wiring Assembly N/S
S187 (Diesel) In T/O for Engine Control Module C1 15
S188 (Diesel) Near T/O for Radiator Fan Relays 2
S189 (Diesel EATX) Near T/O for Battery (+) N/S
S190 (Diesel EATX) Near T/O for Transmission Control Module N/S
S191 (Diesel EATX) Near T/O for Transmission Control Module N/S
S192 (Diesel EATX) In T/O for Transmission Control Module N/S
S193 (Diesel EATX) In T/O for Transmission Control Module N/S
S201 In T/O to Instrument Panel Speaker 20, 26
S202 Near T/O for Instrument Panel Switch Bank 20, 26
S203 Near T/O for Instrument Panel Switch Bank 20, 26
S204 Near T/O to Instrument Panel Speaker 20, 26
S205 Near T/O for C201 N/S
S206 Near T/O for Instrument Cluster 20
S207 Near T/O for A/C Heater Control 20, 26
S208 (RHD) Between T/O for Antenna Connector and T/O for Front
Cigar Lighter26
S209 Near T/O for Evaporator Temperature Sensor N/S
S210 (RHD) Near T/O for C203 26
S211 In Steering Column Wiring Assembly N/S
S212 In Steering Column Wiring Assembly N/S
S222 Near T/O for C204 N/S
S223 Near T/O for Multi-Function Switch 20
S224 Near T/O for Siren N/S
S225 (Hands Free) Near T/O for Rear View Mirror N/S
S226 (Hands Free) In T/O for C207 N/S
S302 In Floor Pan Track Wiring 37
8W - 91 - 14 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONRS
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

8W-97 POWER DISTRIBUTION SYSTEM
TABLE OF CONTENTS
page page
POWER DISTRIBUTION SYSTEM
DESCRIPTION..........................1
OPERATION............................1
SPECIAL TOOLS
POWER DISTRIBUTION SYSTEMS.........1
INTEGRATED POWER MODULE
DESCRIPTION..........................1
OPERATION............................2
REMOVAL.............................2
INSTALLATION..........................2IOD FUSE
DESCRIPTION..........................3
OPERATION............................3
POWER OUTLET
DESCRIPTION..........................3
OPERATION............................3
DIAGNOSIS AND TESTING
DIAGNOSIS & TESTING - POWER OUTLET . . 3
REMOVAL.............................4
INSTALLATION..........................4
POWER DISTRIBUTION
SYSTEM
DESCRIPTION
The power distribution system for this vehicle con-
sists of the following components:
²Integrated Power Module (IPM)
²Front Control Module (FCM)
²Power Outlets
Refer to Wiring Diagrams for complete circuit sche-
matics.
The power distribution system also incorporates
various types of circuit control and protection fea-
tures, including:
²Automatic resetting circuit breakers
²Blade-type fuses
²Bus bars
²Cartridge fuses
²Circuit splice blocks
²Flashers
²Fusible links
²Relays
OPERATION
The power distribution system for this vehicle is
designed to provide safe, reliable, and centralized dis-
tribution points for the electrical current required to
operate all of the many standard and optional facto-
ry-installed electrical and electronic powertrain,
chassis, safety, security, comfort and convenience sys-
tems. At the same time, the power distribution sys-
tem was designed to provide ready access to these
electrical distribution points for the vehicle techni-
cian to use when conducting diagnosis and repair of
faulty circuits. The power distribution system can
also prove useful for the sourcing of additional elec-
trical circuits that may be required to provide theelectrical current needed to operate many accessories
that the vehicle owner may choose to have installed.
SPECIAL TOOLS
POWER DISTRIBUTION SYSTEMS
INTEGRATED POWER MODULE
DESCRIPTION
The Integrated Power Module (IPM) is a combina-
tion of the Power Distribution Center (PDC) and the
Front Control Module (FCM). The IPM is located in
the engine compartment, next to the battery. (Fig. 1).
The PDC mates directly with the FCM to form the
IPM. The PDC is a printed circuit board based mod-
ule that contains fuses and relays, while the FCM
contains the electronics controlling the IPM and
other functions. This IPM connects directly to the
battery positive through a four pin connector. The
ground connection is through two other connectors.
Terminal Pick Kit 6680
RS8W-97 POWER DISTRIBUTION SYSTEM8W-97-1

(3) Remove torque converter or clutch housing
cover and inspect rear of block for evidence of oil.
Use a black light to check for the oil leak. If a leak is
present in this area, remove transmission for further
inspection.
(a) Circular spray pattern generally indicates
seal leakage or crankshaft damage.
(b) Where leakage tends to run straight down,
possible causes are a porous block, oil gallery cup
plug, bedplate to cylinder block mating surfaces
and seal bore. See proper repair procedures for
these items.
(4) If no leaks are detected, pressurize the crank-
case as previously described.
CAUTION: Do not exceed 20.6 kPa (3 psi).
(5) If the leak is not detected, very slowly turn the
crankshaft and watch for leakage. If a leak is
detected between the crankshaft and seal while
slowly turning the crankshaft, it is possible the
crankshaft seal surface is damaged. The seal area on
the crankshaft could have minor nicks or scratches
that can be polished out with emery cloth.
CAUTION: Use extreme caution when crankshaft
polishing is necessary to remove minor nicks and
scratches. The crankshaft seal flange is especially
machined to complement the function of the rear oil
seal.
(6) For bubbles that remain steady with shaft
rotation, no further inspection can be done until dis-
assembled.
(7) After the oil leak root cause and appropriate
corrective action have been identified, replace compo-
nent(s) as necessary.
DIAGNOSIS AND TESTING - CYLINDER
COMPRESSION PRESSURE TEST
The results of a cylinder compression pressure test
can be utilized to diagnose several engine malfunc-
tions.
Ensure the battery is completely charged and the
engine starter motor is in good operating condition.
Otherwise the indicated compression pressures may
not be valid for diagnosis purposes.
(1) Check engine oil level and add oil if necessary.
(2) Drive the vehicle until engine reaches normal
operating temperature. Select a route free from traf-
fic and other forms of congestion, observe all traffic
laws, and accelerate through the gears several times
briskly.
(3) Remove all spark plugs from engine. As spark
plugs are being removed, check electrodes for abnor-
mal firing indicators fouled, hot, oily, etc. Record cyl-
inder number of spark plug for future reference.(4) Remove the Auto Shutdown (ASD) relay from
the PDC.
(5) Be sure throttle blade is fully open during the
compression check.
(6) Insert compression gauge adaptor Special Tool
8116 or the equivalent, into the #1 spark plug hole in
cylinder head. Connect the 0±500 psi (Blue) pressure
transducer (Special Tool CH7059) with cable adap-
tors to the DRBIIIt. For Special Tool identification,
(Refer to 9 - ENGINE - SPECIAL TOOLS).
(7) Crank engine until maximum pressure is
reached on gauge. Record this pressure as #1 cylin-
der pressure.
(8) Repeat the previous step for all remaining cyl-
inders.
(9) Compression should not be less than 689 kPa
(100 psi) and not vary more than 25 percent from cyl-
inder to cylinder.
(10) If one or more cylinders have abnormally low
compression pressures, repeat the compression test.
(11) If the same cylinder or cylinders repeat an
abnormally low reading on the second compression
test, it could indicate the existence of a problem in
the cylinder in question.The recommended com-
pression pressures are to be used only as a
guide to diagnosing engine problems. An engine
should not be disassembled to determine the
cause of low compression unless some malfunc-
tion is present.
DIAGNOSIS AND TESTING - CYLINDER
COMBUSTION PRESSURE LEAKAGE TEST
The combustion pressure leakage test provides an
accurate means for determining engine condition.
Combustion pressure leakage testing will detect:
²Exhaust and intake valve leaks (improper seat-
ing).
²Leaks between adjacent cylinders or into water
jacket.
²Any causes for combustion/compression pressure
loss.
WARNING: DO NOT REMOVE THE PRESSURE CAP
WITH THE SYSTEM HOT AND UNDER PRESSURE
BECAUSE SERIOUS BURNS FROM COOLANT CAN
OCCUR.
Check the coolant level and fill as required. DO
NOT install the pressure cap.
Start and operate the engine until it attains nor-
mal operating temperature, then turn the engine
OFF.
Clean spark plug recesses with compressed air.
Remove the spark plugs.
Remove the oil filler cap.
Remove the air cleaner.
RSENGINE 2.4L9-9
ENGINE 2.4L (Continued)

(3) Remove torque converter or clutch housing
cover and inspect rear of block for evidence of oil.
Use a black light to check for the oil leak. If a leak is
present in this area, remove transmission for further
inspection.
(a) Circular spray pattern generally indicates
seal leakage or crankshaft damage.
(b) Where leakage tends to run straight down,
possible causes are a porous block, oil gallery cup
plug, bedplate to cylinder block mating surfaces
and seal bore. See proper repair procedures for
these items.
(4) If no leaks are detected, pressurize the crank-
case as previously described.
CAUTION: Do not exceed 20.6 kPa (3 psi).
(5) If the leak is not detected, very slowly turn the
crankshaft and watch for leakage. If a leak is
detected between the crankshaft and seal while
slowly turning the crankshaft, it is possible the
crankshaft seal surface is damaged. The seal area on
the crankshaft could have minor nicks or scratches
that can be polished out with emery cloth.
CAUTION: Use extreme caution when crankshaft
polishing is necessary to remove minor nicks and
scratches. The crankshaft seal flange is especially
machined to complement the function of the rear oil
seal.
(6) For bubbles that remain steady with shaft
rotation, no further inspection can be done until dis-
assembled.
(7) After the oil leak root cause and appropriate
corrective action have been identified, replace compo-
nent(s) as necessary.
DIAGNOSIS AND TESTING - CYLINDER
COMPRESSION PRESSURE TEST
The results of a cylinder compression pressure test
can be utilized to diagnose several engine malfunc-
tions.
Ensure the battery is completely charged and the
engine starter motor is in good operating condition.
Otherwise the indicated compression pressures may
not be valid for diagnosis purposes.
(1) Check engine oil level and add oil if necessary.
(2) Drive the vehicle until engine reaches normal
operating temperature. Select a route free from traf-
fic and other forms of congestion, observe all traffic
laws, and accelerate through the gears several times
briskly.
(3) Remove all spark plugs from engine. As spark
plugs are being removed, check electrodes for abnor-
mal firing indicators fouled, hot, oily, etc. Record cyl-
inder number of spark plug for future reference.(4) Remove the Auto Shutdown (ASD) relay from
the PDC.
(5) Be sure throttle blade is fully open during the
compression check.
(6) Insert compression gauge adaptor Special Tool
8116 or the equivalent, into the #1 spark plug hole in
cylinder head. Connect the 0±500 psi (Blue) pressure
transducer (Special Tool CH7059) with cable adap-
tors to the DRBIIIt. For Special Tool identification,
(Refer to 9 - ENGINE - SPECIAL TOOLS).
(7) Crank engine until maximum pressure is
reached on gauge. Record this pressure as #1 cylin-
der pressure.
(8) Repeat the previous step for all remaining cyl-
inders.
(9) Compression should not be less than 689 kPa
(100 psi) and not vary more than 25 percent from cyl-
inder to cylinder.
(10) If one or more cylinders have abnormally low
compression pressures, repeat the compression test.
(11) If the same cylinder or cylinders repeat an
abnormally low reading on the second compression
test, it could indicate the existence of a problem in
the cylinder in question.The recommended com-
pression pressures are to be used only as a
guide to diagnosing engine problems. An engine
should not be disassembled to determine the
cause of low compression unless some malfunc-
tion is present.
DIAGNOSIS AND TESTING - CYLINDER
COMBUSTION PRESSURE LEAKAGE TEST
The combustion pressure leakage test provides an
accurate means for determining engine condition.
Combustion pressure leakage testing will detect:
²Exhaust and intake valve leaks (improper seat-
ing).
²Leaks between adjacent cylinders or into water
jacket.
²Any causes for combustion/compression pressure
loss.
WARNING: DO NOT REMOVE THE PRESSURE CAP
WITH THE SYSTEM HOT AND UNDER PRESSURE
BECAUSE SERIOUS BURNS FROM COOLANT CAN
OCCUR.
Check the coolant level and fill as required. DO
NOT install the pressure cap.
Start and operate the engine until it attains nor-
mal operating temperature, then turn the engine
OFF.
Clean spark plug recesses with compressed air.
Remove the spark plugs.
Remove the oil filler cap.
Remove the air cleaner.
RSENGINE 3.3/3.8L9-85
ENGINE 3.3/3.8L (Continued)

FRONT BUMPER
REINFORCEMENT
REMOVAL
(1) Remove front bumper fascia. (Refer to 13 -
FRAMES & BUMPERS/BUMPERS/FRONT FASCIA
- REMOVAL)
(2) Disconnect the solid state relay (SSR) for the
cooling module wiring connector. If bumper reinforce-
ment is being replaced, remove the solid state relay.
(3) Support front bumper reinforcement on a suit-
able lifting device.
(4) Remove the four nuts attaching front bumper
reinforcement to frame rail (Fig. 3).
(5) Remove front bumper reinforcement from vehi-
cle.
INSTALLATION
NOTE: Check position of the arrows molded into
the foam for correct orientation.
Fig. 2 FRONT FASCIA
1 - GRILLE
2 - FRONT BUMPER FIASCO
3 - BUMPER REINFORCEMENT4 - RADIATOR ENCLOSURE
5 - AIR DAM
Fig. 3 FRONT BUMPER REINFORCEMENT
1 - FRONT BUMPER REINFORCEMENT
2 - FRAME RAILS
RSFRAME & BUMPERS13-3
FRONT FASCIA (Continued)