2003 CHRYSLER CARAVAN torque

FUEL SYSTEM
TABLE OF CONTENTS
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FUEL DELIVERY..........................1FUEL INJECTION........................17
FUEL DELIVERY
TABLE OF CONTENTS
page page
FUEL DELIVERY
DESCRIPTION
DESCRIPTION........................2
DESCRIPTION - FFV REPLACEMENT
PARTS...............................2
OPERATION............................2
DIAGNOSIS AND TESTING - FUEL DELIVERY
SYSTEM.............................2
STANDARD PROCEDURE
STANDARD PROCEDURE - FUEL SYSTEM
PRESSURE RELEASE PROCEDURE.......2
STANDARD PROCEDURE - DRAINING
FUEL TANK...........................2
SPECIFICATIONS
FUEL SYSTEM PRESSURE..............3
TORQUE.............................3
SPECIAL TOOLS
FUEL................................3
FUEL FILTER
REMOVAL.............................4
INSTALLATION..........................4
FUEL LEVEL SENDING UNIT / SENSOR
DESCRIPTION..........................4
OPERATION............................5
REMOVAL.............................5
INSTALLATION..........................5
FUEL LINES
DESCRIPTION - FUEL LINES/HOSES AND
CLAMPS.............................6
STANDARD PROCEDURE - HOSES AND
CLAMP..............................6
FUEL PRESSURE REGULATOR
OPERATION............................7REMOVAL.............................7
INSTALLATION..........................7
FUEL PUMP
DESCRIPTION..........................7
OPERATION............................7
FUEL PUMP MODULE
DESCRIPTION..........................8
OPERATION............................8
REMOVAL.............................8
INSTALLATION..........................9
FUEL RAIL
REMOVAL
REMOVAL - 2.4L.......................9
REMOVAL - 3.3/3.8L....................9
INSTALLATION
INSTALLATION - 2.4L..................10
INSTALLATION - 3.3/3.8L................10
FUEL TANK
DESCRIPTION.........................10
OPERATION...........................10
REMOVAL.............................11
INSTALLATION.........................11
FUEL TANK FILLER TUBE
REMOVAL.............................12
INSTALLATION.........................12
INLET FILTER
REMOVAL.............................13
INSTALLATION.........................13
QUICK CONNECT FITTING
STANDARD PROCEDURE - QUICK-CONNECT
FITTINGS...........................13
RSFUEL SYSTEM14-1
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nect rubber fuel fill or vent hoses from tank at this
time.
(7) Place a transmission jack under center of fuel
tank. Apply a slight amount of pressure to fuel tank
with transmission jack.
(8) Remove fuel tank mounting strap nuts from
mounting strap studs.
(9)Lower the tank just enough so that the
filler tube fitting is the highest point of the fuel
tank.
(10) Remove filler tube from fuel tank. Tank will
be drained through this fitting.
WARNING: WRAP SHOP TOWELS AROUND HOSES
TO CATCH ANY GASOLINE SPILLAGE.(11) Drain fuel tank into holding tank or a prop-
erly labeledGasolinesafety container.
CAUTION: GASOLINE OR GASOLINE VAPORS ARE
HIGHLY FLAMMABLE. A FIRE COULD OCCUR IF AN
IGNITION SOURCE IS PRESENT. NEVER DRAIN OR
STORE GASOLINE OR DIESEL FUEL IN AN OPEN
CONTAINER, DUE TO THE POSSIBILITY OF FIRE
OR EXPLOSION.
(12) If fuel pump module removal is necessary,
refer to Fuel Pump Module Removal/Installation in
this section.
SPECIFICATIONS
FUEL SYSTEM PRESSURE
400 kpa  34 kpa (58 psi   5 psi)
TORQUE
DESCRIPTION N´m Ft. Lbs. In. Lbs.
Fuel Filler Neck Clamp 3.3 30
Fuel Rail 2.4L 22 200
Fuel Rail 3.3/3.8L 11.8 105
Fuel Tank Strap 54 40
Fuel Tank T Strap 28.2 250
Fuel Filter Bolt 4.5 40
SPECIAL TOOLS
FUEL
Pressure Gauge Assembly C±4799±B
Fuel Pressure Test Adapter 6539
RSFUEL DELIVERY14-3
FUEL DELIVERY (Continued)
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When installing hoses, ensure that they are routed
away from contact with other vehicle components
that could rub against them and cause failure. Avoid
contact with clamps or other components that cause
abrasions or scuffing. Ensure that rubber hoses are
properly routed and avoid heat sources.
The hose clamps have rolled edges to prevent the
clamp from cutting into the hose. Only use clamps
that are original equipment or equivalent. Other
types of clamps may cut into the hoses and cause
high pressure fuel leaks. Tighten hose clamps to 1
N´m (9 in. lbs.) torque.
Inspect all hose connections such as clamps, cou-
plings and fittings to make sure they are secure and
leaks are not present. The component should be
replaced immediately if there is any evidence of deg-
radation that could result in failure.
Never attempt to repair a plastic fuel line/tube.
Replace as necessary.
Avoid contact of any fuel tubes/hoses with other
vehicle components that could cause abrasions or
scuffing. Be sure that the plastic fuel lines/tubes are
properly routed to prevent pinching and to avoid heat
sources.
FUEL PRESSURE REGULATOR
OPERATION
The fuel system uses a nonadjustable pressure reg-
ulator that maintains fuel system pressure at
approximately 400  34 kPa (58  5 psi). The fuel
pressure regulator contains a diaphragm, calibrated
spring and a fuel return valve. The spring pushes
down on the diaphragm and closes off the fuel return
port. System fuel pressure reflects the amount of fuel
pressure required to open the return port.
The pressure regulator is a mechanical device that
is NOT controlled by the PCM or engine vacuum.
REMOVAL
The fuel pressure regulator is part of the fuel
pump module (Fig. 9). Remove the fuel pump module
from the fuel tank to access the fuel pressure regula-
tor. Refer to the Fuel Pump Module removal in this
section.
(1) Spread tangs on pressure regulator retainer.
(2) Pry fuel pressure regulator out of housing.
(3) Ensure both upper and lower O-rings were
removed with regulator.
INSTALLATION
The fuel pressure regulator is part of the fuel
pump module. Remove the fuel pump module from
the fuel tank to access the fuel pressure regulator.Refer to the Fuel Pump Module removal in this sec-
tion.
(1) Lightly lubricate the O-rings with clean engine
oil and place them into opening in pump module (Fig.
9).
(2) Push regulator into opening in pump module.
(3) Fold tangs on regulator retainer over tabs on
housing.
FUEL PUMP
DESCRIPTION
The electric fuel pump is located in and is part of
the fuel pump module. It is a positive displacement,
gerotor type, immersible pump with a permanent
magnet electric motor. The fuel pump module is sus-
pended in fuel in the fuel tank.
OPERATION
The pump draws fuel through a strainer and
pushes it through the motor to the outlet. The pump
contains a check valve. The valve, in the pump out-
let, maintains pump pressure during engine off con-
ditions, for a short while. It is normal for fuel
pressure to drop to zero after cooldown. The fuel
pump relay provides voltage to the fuel pump. The
fuel pump has a maximum deadheaded pressure out-
put of approximately 880 kPa (130 psi). The regula-
tor adjusts fuel system pressure to approximately
400 kpa  34 kpa (58 psi   5 psi).
NOTE: Checkvalve maintains volume of fuel in the
rail and lines, not pressure.
Fig. 9 Fuel Pressure Regulator O-rings
1 - UPPER O-RING
2 - LOWER 0-RING
RSFUEL DELIVERY14-7
FUEL LINES (Continued)
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(7) Remove fuel rail. Be careful not to damage the
injector O-rings upon removal from their ports.
INSTALLATION
INSTALLATION - 2.4L
(1) Ensure injector holes are clean. Replace
O-rings if damaged.
(2) Lubricate injector O-rings with a drop of clean
engine oil to ease installation.
(3) Put the tip of each injector into their ports.
Push the assembly into place until the injectors are
seated in the ports.
(4) Install the fuel rail mounting bolts. Tighten
bolts to 22 N´m (200 in. lbs.) torque.
(5) Connect the connectors to the fuel injectors.
(6) Install wiring harness to brackets.
(7) Connect the wiring connectors to fuel injectors
harness (Fig. 13).
(8) Connect negative battery cable.
(9) Use the DRBIIItscan tool to pressurize the
fuel system. Check for leaks.
INSTALLATION - 3.3/3.8L
(1) Ensure injector holes are clean. Replace
O-rings if damaged.
(2) Lubricate injector O-rings with a drop of clean
engine oil to ease installation.
(3) Put the tip of each injector into their ports.
Push the assembly into place until the injectors are
seated in the ports.
(4) Install the fuel rail mounting bolts. Tighten
bolts to 22 N´m (200 in. lbs.) torque.
(5) Remove covering on lower intake manifold and
clean surface.(6) Install the Upper Intake Manifold, refer to
Engine/Manifolds/Upper Intake for more information.
(7) Install fuel hose quick connector fitting to chas-
sis tubes.Refer to Fuel Hoses, Clamps and
Quick Connect Fittings in this Section.Push the
fitting onto the chassis tube until it clicks into place.
Pull on the fitting to ensure complete insertion.
(8) Connect negative cable to battery.
(9) Use the DRBIIItscan tool to pressurize the
fuel system. Check for leaks.
FUEL TANK
DESCRIPTION
The fuel tank is constructed of a plastic material.
Its main functions are for fuel storage and for place-
ment of the fuel pump module. The tank is made
from High density Polyethylene (HDPE) material.If
equipped with ORVR (Onboard Refueling Vapor
Recovery) it has been added to the fuel tank to con-
trol refueling vapor emissions.
OPERATION
All models pass a full 360 degree rollover test
without fuel leakage. To accomplish this, fuel and
vapor flow controls are required for all fuel tank con-
nections.
All models are equipped with either one or two
rollover valves mounted into the top of the fuel tank
(or pump module).
An evaporation control system is connected to the
rollover valve(s)/control valve(Refer to 25 - EMIS-
SIONS CONTROL/EVAPORATIVE EMISSIONS/
ORVR - OPERATION) to reduce emissions of fuel
vapors into the atmosphere, when the tank is vented
due to vapor expansion in the tank. When fuel evap-
orates from the fuel tank, vapors pass through vent
hoses or tubes to a charcoal canister where they are
temporarily held. When the engine is running, the
vapors are drawn into the intake manifold. In addi-
tion, fuel vapors produced during vehicle refueling
are allowed to pass through the vent hoses/tubes to
the charcoal canister(s) for temporary storage (prior
to being drawn into the intake manifold). All models
are equipped with a self-diagnosing system using a
Leak Detection Pump (LDP) or Natural Vacuum
Leak Detection (NVLD). Refer to the Emission Con-
trol System for additional information.
INLET CHECK VALVE
All vehicles have an inlet check valve on the inside
of the fuel tank at the filler inlet
The valve prevents fuel from splashing back on
customer during vehicle refueling. The valve is a
non-serviceable item.
Fig. 14 FUEL INJECTORS 3.3/3.8L
14 - 10 FUEL DELIVERYRS
FUEL RAIL (Continued)
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(4) Tighten strap bolts to 54 N´m (40 ft. lbs.)
torque. Tighten T strap bolt to 28.2 N´m (250 in.
lbs.). Remove transmission jack.
(5) Tighten filler hose clamp to 3.3 N´m (30 in.
lbs.).
CAUTION: Ensure straps are not twisted or bent
before or after tightening strap nuts.
(6) Connect fuel pump/module electrical connector.
Place retainer in locked position.
(7) Lubricate the fuel supply line with clean 30
weight engine oil, install the quick connect fuel fit-ting. Refer to Tube/Fitting Assembly in the Fuel
Delivery section of this section.
(8) Connect the control vapor line at rear of tank.
(9) Attach filler vent line to filler tube. Pull on
connector to make sure of connection.
(10) Fill fuel tank, replace cap, and connect bat-
tery negative cable.
(11) Use the DRBIIItscan tool to pressurize the
fuel system. Check for leaks.
FUEL TANK FILLER TUBE
REMOVAL
(1) Disconnect the negative battery cable.
(2) Remove the 3 screws at the filler door.
(3) Raise and support vehicle
(4) Remove the left rear tire.
(5) Remove the splash shield (Fig. 20) or (Fig. 21).
(6) Remove the canister from filler tube (Fig. 22).
(7) Disconnect the vent at the top of the filler tube.
(8) Remove the ground strap.
(9) Remove filler tube at tank.
INSTALLATION
(1) Install filler tube to tank (Fig. 20).
(2) Install the ground strap.
(3) Connect the vent at the top of the filler tube.
(4) Install the 3 screws at the filler door.
Fig. 18 Pump Module Connector Retainer and Lock
1 - PUSH DOWN ON RETAINER
2 - CONNECTOR LOCK
Fig. 19 VENT HOSE
Fig. 20 FUEL FILLER TUBE AND VENT TUBE (RG)
14 - 12 FUEL DELIVERYRS
FUEL TANK (Continued)
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FUEL INJECTION
TABLE OF CONTENTS
page page
FUEL INJECTION
OPERATION
OPERATION - INJECTION SYSTEM.......18
OPERATION - MODES OF OPERATION....18
FUEL CORRECTION or ADAPTIVE
MEMORIES..........................20
PROGRAMMABLE COMMUNICATIONS
INTERFACE (PCI) BUS.................21
SYSTEM DIAGNOSIS..................22
SPECIFICATIONS
TORQUE............................22
SPECIAL TOOLS
FUEL...............................23
ACCELERATOR PEDAL
REMOVAL.............................23
INSTALLATION.........................24
CRANKSHAFT POSITION SENSOR
DESCRIPTION.........................24
OPERATION...........................24
REMOVAL.............................25
INSTALLATION - 2.4L....................25
ENGINE SPEED SENSOR
DESCRIPTION.........................25
OPERATION...........................26
FUEL INJECTOR
DESCRIPTION.........................26
OPERATION...........................26
REMOVAL
REMOVAL - 2.4L......................26
REMOVAL - 3.3/3.8L...................27
INSTALLATION
INSTALLATION - 2.4L..................27
INSTALLATION - 3.3/3.8L................27
FUEL PUMP RELAY
DESCRIPTION.........................28
OPERATION...........................28
IDLE AIR CONTROL MOTOR
DESCRIPTION.........................28
OPERATION...........................28
REMOVAL.............................29INSTALLATION.........................29
INLET AIR TEMPERATURE SENSOR
DESCRIPTION.........................29
OPERATION...........................29
MAP SENSOR
DESCRIPTION.........................30
OPERATION...........................30
REMOVAL
REMOVAL - 2.4L......................31
REMOVAL - 3.3/3.8L...................31
INSTALLATION
INSTALLATION - 2.4L..................31
INSTALLATION - 3.3/3.8L................31
O2 SENSOR
DESCRIPTION.........................31
OPERATION...........................31
REMOVAL
REMOVAL - UPSTREAM 1/1 - 2.4L........33
REMOVAL - UPSTREAM 1/1 - 3.3/3.8L.....33
REMOVAL - DOWNSTREAM 1/2 - 2.4/3.3/
3.8L................................33
INSTALLATION
INSTALLATION - UPSTREAM 1/1 - 2.4L.....33
INSTALLATION - UPSTREAM 1/1 - 3.3/3.8L . . 34
INSTALLATION DOWNSTREAM 2/1 -
2.4/3.3/3.8L..........................34
THROTTLE BODY
DESCRIPTION.........................34
OPERATION...........................34
REMOVAL.............................35
INSTALLATION.........................35
THROTTLE CONTROL CABLE
REMOVAL.............................35
INSTALLATION.........................35
THROTTLE POSITION SENSOR
DESCRIPTION.........................36
OPERATION...........................36
REMOVAL - 3.3/3.8L.....................36
INSTALLATION - 3.3/3.8L.................36
RSFUEL INJECTION14-17
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²Instrument Panel
²Body Control Module
²Air Bag System Diagnostic Module
²Full ATC Display Head (if equipped)
²ABS Module
²Transmission Control Module
²Powertrain Control Module
²Travel Module
²SKIM
SYSTEM DIAGNOSIS
OPERATION
The PCM can test many of its own input and out-
put circuits. If the PCM senses a fault in a majorsystem, the PCM stores a Diagnostic Trouble Code
(DTC) in memory.
For DTC information see On-Board Diagnostics
(Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/POWERTRAIN CONTROL MOD-
ULE - DESCRIPTION) .
SPECIFICATIONS
TORQUE
DESCRIPTION N´m Ft. Lbs. In. Lbs.
MAP SENSOR PLASTIC
MANIFOLD1.7 15
MAP SENSOR
ALUMINUM MANIFOLD3.3 30
POWER STEERING
RESERVOIR PLASTIC
MANIFOLD5.7 50
POWER STEERING
RESERVOIR ALUMINUM
MANIFOLD11.9 105
THROTTLE CABLE
BRACKET PLASTIC
MANIFOLD5.7 50
THROTTLE CABLE
BRACKET ALUMINUM
MANIFOLD11.9 105
EGR TUBE PLASTIC
MANIFOLD5.7 50
EGR TUBE ALUMINUM
MANIFOLD11.9 105
THROTTLE BODY BOLTS
2.4L28 20.65 250  50
THROTTLE BODY BOLTS
3.3/3.8L11.8 8.7 105  20
O2 Sensors 27 20
The composite manifolds uses special Plastic screws. The factory installed Plastic screws can be removed and
installed up to 5 times. Do not exceed the specified torque. These screws must be installed slowly (less than 600
rpms) to avoid melting the parent material. There are service repair screws avialable for repair. They require a
higher torque than the original screws..
14 - 22 FUEL INJECTIONRS
FUEL INJECTION (Continued)
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INSTALLATION
(1) Position accelerator pedal assembly on dash
panel. Install retaining nuts. Tighten retaining nuts
to 12 N´m (105 in. lbs.) torque (Fig. 3).(2) From inside the vehicle, hold up the pedal and
install the throttle cable and pedal retainer in the
upper end of the pedal lever (Fig. 2).
(3) From the engine compartment, hold the throt-
tle body lever in the wide open position and install
the throttle cable (Fig. 1).
CRANKSHAFT POSITION
SENSOR
DESCRIPTION
The 2.4L crankshaft sensor is located on the rear
of the engine near the accessory drive belt (Fig. 4).
The 3.3/3.8L crankshaft sensor is located on the rear
of the transmission housing, above the differential
housing (Fig. 5). The bottom of the sensor is posi-
tioned next to the drive plate.
OPERATION
The crankshaft position sensor detects slots cut
into the transmission driveplate extension (Fig. 6).
There are 3 sets of slots. Each set contains 4 slots,
for a total of 12 slots (Fig. 7). Basic timing is set by
the position of the last slot in each group. Once the
Powertrain Control Module (PCM) senses the last
slot, it determines crankshaft position (which piston
will next be at TDC) from the camshaft position sen-
sor input. The 4 pulses generated by the crankshaft
position sensor represent the 69É, 49É, 29É, and 9É
BTDC marks. It may take the PCM one engine rev-
olution to determine crankshaft position.
The PCM uses crankshaft position reference to
determine injector sequence, ignition timing and the
presence of misfire. Once the PCM determines crank-
shaft position, it begins energizing the injectors in
sequence.
Fig. 2 CABLE CLIP AND GROMMET
1 - Retainer Clip
2 - Grommet
3 - Cable Assembly
4 - Cable Retainer
5 - Dash Panel
6 - Grommet
Fig. 3 ACCELERATOR PEDAL AND THROTTLE
CABLE
1 - Grommet
2 - Cable
3 - Pedal Shaft and Bracket
4 - Seal
5 - Dash Panel
6 - Cable Assembly
Fig. 4 CRANKSHAFT SENSOR 2.4L
14 - 24 FUEL INJECTIONRS
ACCELERATOR PEDAL (Continued)
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