fuel filter CHRYSLER VOYAGER 2004 Owner's Manual

FUEL DELIVERY
DESCRIPTION
The front wheel drive car uses a plastic fuel tank
located rear center of the vehicle.
The Fuel Delivery System consists of: the following
items:
²Electric fuel pump module
²Fuel filter
²Tubes/lines/hoses
²Fuel injectors
The in-tank fuel pump module contains the fuel
pump. The pump is serviced as part of the fuel pump
module. Refer to Fuel Pump Module.
The fuel filter is replaceable only as part of the
fuel pump module.
OPERATION
The fuel system provides fuel pressure by an
in-tank pump module. The Powertrain Control Mod-
ule (PCM) controls the operation of the fuel system
by providing battery voltage to the fuel pump
through the fuel pump relay. The PCM requires only
three inputs and a good ground to operate the fuel
pump relay. The three inputs are:
²Ignition voltage
²Crankshaft Position (CKP) sensor
²Camshaft Position (CMP) sensor
DIAGNOSIS AND TESTING - FUEL DELIVERY
SYSTEM
(Refer to Appropriate Diagnostic Information)
STANDARD PROCEDURE
STANDARD PROCEDURE - FUEL SYSTEM
PRESSURE RELEASE PROCEDURE
(1) Remove Fuel Pump relay from Power Distribu-
tion Center (PDC). For location of relay, refer to label
on underside of PDC cover.
(2) Start and run engine until it stalls.
(3) Attempt restarting engine until it will no
longer run.
(4) Turn ignition key to OFF position.
(5) Return fuel pump relay to PDC.
(6) One or more Diagnostic Trouble Codes (DTC's)
may have been stored in PCM memory due to fuel
pump relay removal. The DRB IIItscan tool must be
used to erase a DTC.
STANDARD PROCEDURE - DRAINING FUEL
TANK
Two different procedures may be used to drain fuel
tank (lowering tank or using DRBIIItscan tool).The quickest draining procedure involves lowering
the fuel tank.
WARNING: RELEASE FUEL SYSTEM PRESSURE
BEFORE SERVICING FUEL SYSTEM COMPONENTS.
SERVICE VEHICLES IN WELL VENTILATED AREAS
AND AVOID IGNITION SOURCES. NEVER SMOKE
WHILE SERVICING THE VEHICLE. THIS MAY
RESULT IN PERSONAL INJURY OR DEATH.
As an alternative procedure, the electric fuel pump
may be activated allowing tank to be drained at fuel
rail connection. Refer to DRBIIItscan tool for fuel
pump activation procedures. Before disconnecting
fuel line at fuel rail, release fuel pressure. Refer to
the Fuel System Pressure Release Procedure in this
group for procedures. Disconnect the fuel line at the
fuel rail and remove the plastic retainer from the
fuel rail. Take plastic retainer and install it back into
the fuel line from body. Check the O-ring and make
sure that it is in place and not damaged. Attach end
of special test hose tool number 6539 at fuel line con-
nection from the body line. Position opposite end of
this hose tool to an approved gasoline draining sta-
tion. Activate fuel pump and drain tank until empty.
When done remove the special test hose tool number
6539 from the body line. Remove the plastic retainer
from the special test hose tool number 6539 and rein-
stall it into the fuel line from the body. Check the
O-ring and make sure that it is in place and not
damaged. Install the fuel line to the fuel rail.
If electric fuel pump is not operating, tank must be
lowered for fuel draining. Refer to following proce-
dures.
(1) Remove fuel filler cap.
(2) Perform the Fuel System Pressure Release pro-
cedure.
(3) Disconnect negative cable from battery.
(4) Raise vehicle and support.
(5) Certain models are equipped with a separate
grounding wire (strap) connecting the fuel fill tube
assembly to the body. Disconnect wire by removing
screw.
(6) Open fuel fill door and remove screws mount-
ing fuel filler tube assembly to body. Do not discon-
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 straps.
(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.
14 - 2 FUEL DELIVERYRS

NOTE: WRAP SHOP TOWELS AROUND HOSES TO
CATCH ANY GASOLINE SPILLAGE.
(11) Drain fuel tank into holding tank or a prop-
erly labeledGasolinesafety container.
WARNING: GASOLINE OR GASOLINE VAPORS ARE
HIGHLY FLAMMABLE. A FIRE COULD OCCUR IF AN
IGNITION SOURCE IS PRESENT. NEVER DRAIN ORSTORE GASOLINE OR DIESEL FUEL IN AN OPEN
CONTAINER, DUE TO THE POSSIBILITY OF FIRE
OR EXPLOSION. THIS MAY RESULT IN PERSONAL
INJURY OR DEATH.
(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 22 195
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
RSFUEL DELIVERY14-3
FUEL DELIVERY (Continued)

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).
FUEL PUMP MODULE
DESCRIPTION
The fuel pump module is installed in the top of the
fuel tank (Fig. 9).
The fuel pump module contains the following:
²Electric fuel pump²Fuel pump reservoir
²Inlet strainer
²Fuel pressure regulator
²Fuel gauge sending unit
²Fuel supply line connection
The inlet strainer, fuel pressure regulator
and fuel level sensor are the only serviceable
items. If the fuel pump or electrical wiring har-
ness requires service, replace the fuel pump
module.
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.
OPERATION
The pump draws fuel through a strainer and
pushes it through the motor to the outlet. The pump
contains one check valve. The check valve, in the
pump outlet, maintains pump pressure during engine
off conditions. The fuel pump relay provides voltage
to the fuel pump.
The fuel pump has a maximum deadheaded pres-
sure output of approximately 880 kPa (130 psi). The
regulator adjusts fuel system pressure to approxi-
mately 400  34 kPa (58  5 psi).
FUEL PUMP ELECTRICAL CONTROL
Voltage to operate the electric pump is supplied
through the fuel pump relay. For an electrical opera-
tional description of the fuel pump refer to fuel Pump
RelayÐPCM Output.
ELECTRICAL PUMP REPLACEMENT
The electric fuel pump is not serviceable. If the
fuel pump or electrical wiring harness needs replace-
ment, the complete fuel pump module must be
replaced. Perform the Fuel System Pressure Release
procedure before servicing the fuel pump.
REMOVAL
WARNING: RELEASE FUEL SYSTEM PRESSURE
BEFORE SERVICING FUEL SYSTEM COMPONENTS.
SERVICE VEHICLES IN WELL VENTILATED AREAS
AND AVOID IGNITION SOURCES. NEVER SMOKE
WHILE SERVICING THE VEHICLE.
(1) Remove fuel filler cap and perform Fuel Sys-
tem Pressure Release procedure.
(2) Disconnect negative cable from auxiliary
jumper terminal.
(3) Drain fuel tank, refer to the Fuel Tank proce-
dure in the Fuel Delivery section.
(4) Remove fuel tank, refer to the Fuel Tank
removal section.
Fig. 9 Fuel Pump Module
1 - INLET STRAINER
2 - FUEL RESERVOIR
3 - FUEL PRESSURE REGULATOR
4 - FUEL LEVEL SENSOR
5 - FILTER
6 - GROUND STRAPS
14 - 8 FUEL DELIVERYRS

INSTALLATION
(1) Install filler tube to tank (Fig. 19).
(2) Install the ground strap.
(3)For RGConnect the vent at the top of the filler
tube.
(4) Install the 3 screws at the filler door.(5)For RGInstall the canister from filler tube
(Fig. 20).
(6) Install the splash shield.
(7) Install the left rear tire.
(8) lower vehicle.
(9) Connect the negative battery cable.
INLET FILTER
REMOVAL
(1) Remove fuel pump module. Refer to Fuel Pump
Module Removal in this section.
(2) Using a thin straight blade screwdriver, pry
back the locking tabs on fuel pump reservoir and
remove the strainer (Fig. 21).
(3) Remove strainer O-ring from the fuel pump
reservoir body.
(4) Remove any contaminants in the fuel tank by
washing the inside of the fuel tank.
INSTALLATION
(1) Lubricate the strainer O-ring with clean engine
oil.
(2) Insert strainer O-ring into outlet of strainer so
that it sits evenly on the step inside the outlet.
(3) Push strainer onto the inlet of the fuel pump
reservoir body. Make sure the locking tabs on the
reservoir body lock over the locking tangs on the
strainer.
(4) Install fuel pump module. Refer to Fuel Pump
Module Installation in this section.
Fig. 19 FUEL FILLER TUBE AND VENT TUBE (RG)
Fig. 20 FUEL TUBE VENT CANISTER (RG)
Fig. 21 Inlet
1 - TABS
2 - INLET STRAINER
RSFUEL DELIVERY14-13
FUEL TANK FILLER TUBE (Continued)

THROTTLE BODY
DESCRIPTION
The throttle body is located on the intake manifold
(Fig. 28) or (Fig. 29). Fuel does not enter the intake
manifold through the throttle body. Fuel is sprayed
into the manifold by the fuel injectors.
OPERATION
Filtered air from the air cleaner enters the intake
manifold through the throttle body. The throttle bodycontains an air control passage controlled by an Idle
Air Control (IAC) motor. The air control passage is
used to supply air for idle conditions. A throttle valve
(plate) is used to supply air for above idle conditions.
Certain sensors are attached to the throttle body.
The accelerator pedal cable, speed control cable are
connected to the throttle body cam.
A (factory adjusted) set screw is used to mechani-
cally limit the position of the throttle body throttle
plate.Never attempt to adjust the engine idle
speed using this screw.All idle speed functions are
controlled by the PCM.
REMOVAL
(1) Disconnect negative cable from battery cable.
(2) Remove air inlet to throttle body hose clamp.
(3) Remove throttle and the speed control (if
equipped) cables from lever and bracket.
(4) Disconnect electrical connectors from the idle
air control motor and throttle position sensor (TPS)
(Fig. 28) or (Fig. 29).
(5) Remove throttle body to intake manifold
attaching bolts.
(6) Remove throttle body and gasket.
INSTALLATION
(1) Install a new gasket, if required.
(2) Install throttle body.
(3) Tighten throttle body mounting bolts. The 2.4L
to 28.2 N´m (250  50 in. lbs.) torque, The 3.3/3.8L to
11.6 N´m (105  20 in. lbs.) torque.
(4) Connect electrical connectors to the idle air
control motor and throttle position sensor (TPS) (Fig.
28) or (Fig. 29).
(5) Install air inlet to throttle body hose clamp and
tighten.
(6) Connect negative cable to battery cable.
THROTTLE CONTROL CABLE
REMOVAL
(1) Working from the engine compartment, hold
the throttle body throttle lever in the wide open posi-
tion.
(2) Remove the throttle cable from the throttle
body cam.
(3) From inside the vehicle, hold up the pedal and
remove the cable retainer and throttle cable from the
upper end of the pedal shaft.
(4) Remove retainer clip from throttle cable and
grommet at dash panel.
(5) From the engine compartment, pull the throttle
cable and gromment out of the dash panel.
(6) Remove the throttle cable from throttle bracket
by carefully compressing both retaining ears simulta-
Fig. 28 IAC VALVE 2.4L
1 - Idle Air Control Valve
2 - Throttle Position Sensor
Fig. 29 IAC VALVE LOCATION 3.3/3.8L
1 - Idle Air Control Valve
2 - Throttle Position Sensor
RSFUEL INJECTION14-35

period the switch ratio reaches a predetermined
value, a counter is incremented by one. The monitor
is enabled to run another test during that trip. When
the test fails 6 times, the counter increments to 3, a
malfunction is entered, and a Freeze Frame is stored,
the code is matured and the MIL is illuminated. If
the first test passes, no further testing is conducted
during that trip.
The MIL is extinguished after three consecutive
good trips. The good trip criteria for the catalyst
monitor is more stringent than the failure criteria. In
order to pass the test and increment one good trip,
the downstream sensor switch rate must be less than
45% of the upstream rate. The failure percentages
are 59% respectively.
Enabling ConditionsÐThe following conditions
must typically be met before the PCM runs the cat-
alyst monitor. Specific times for each parameter may
be different from engine to engine.
²Accumulated drive time
²Enable time
²Ambient air temperature
²Barometric pressure
²Catalyst warm-up counter
²Engine coolant temperature
²Vehicle speed
²MAP
²RPM
²Engine in closed loop
²Fuel level
Pending ConditionsÐ
²Misfire DTC
²Front Oxygen Sensor Response
²Front Oxygen Sensor Heater Monitor
²Front Oxygen Sensor Electrical
²Rear Oxygen Sensor Rationality (middle check)
²Rear Oxygen Sensor Heater Monitor
²Rear Oxygen Sensor Electrical
²Fuel System Monitor
²All TPS faults
²All MAP faults
²All ECT sensor faults
²Purge flow solenoid functionality
²Purge flow solenoid electrical
²All PCM self test faults
²All CMP and CKP sensor faults
²All injector and ignition electrical faults
²Idle Air Control (IAC) motor functionality
²Vehicle Speed Sensor
²Brake switch (auto trans only)
²Intake air temperature
ConflictÐThe catalyst monitor does not run if any
of the following are conditions are present:
²EGR Monitor in progress (if equipped)
²Fuel system rich intrusive test in progress
²EVAP Monitor in progress²Time since start is less than 60 seconds
²Low fuel level-less than 15 %
²Low ambient air temperature
²Ethanol content learn is taking place and the
ethanol used once flag is set
SuspendÐThe Task Manager does not mature a
catalyst fault if any of the following are present:
²Oxygen Sensor Monitor, Priority 1
²Oxygen Sensor Heater, Priority 1
²EGR Monitor, Priority 1 (if equipped)
²EVAP Monitor, Priority 1
²Fuel System Monitor, Priority 2
²Misfire Monitor, Priority 2
OPERATION - NON-MONITORED CIRCUITS
The PCM does not monitor all circuits, systems
and conditions that could have malfunctions causing
driveability problems. However, problems with these
systems may cause the PCM to store diagnostic trou-
ble codes for other systems or components. For exam-
ple, a fuel pressure problem will not register a fault
directly, but could cause a rich/lean condition or mis-
fire. This could cause the PCM to store an oxygen
sensor or misfire diagnostic trouble code.
The major non-monitored circuits are listed below
along with examples of failures modes that do not
directly cause the PCM to set a DTC, but for a sys-
tem that is monitored.
FUEL PRESSURE
The fuel pressure regulator controls fuel system
pressure. The PCM cannot detect a clogged fuel
pump inlet filter, clogged in-line fuel filter, or a
pinched fuel supply or return line. However, these
could result in a rich or lean condition causing the
PCM to store an oxygen sensor, fuel system, or mis-
fire diagnostic trouble code.
SECONDARY IGNITION CIRCUIT
The PCM cannot detect an inoperative ignition coil,
fouled or worn spark plugs, ignition cross firing, or
open spark plug cables. The misfire will however,
increase the oxygen content in the exhaust, deceiving
the PCM in to thinking the fuel system is too lean.
Also see misfire detection.
CYLINDER COMPRESSION
The PCM cannot detect uneven, low, or high engine
cylinder compression. Low compression lowers O2
content in the exhaust. Leading to fuel system, oxy-
gen sensor, or misfire detection fault.
EXHAUST SYSTEM
The PCM cannot detect a plugged, restricted or
leaking exhaust system. It may set a EGR (if
equipped) or Fuel system or O2S fault.
RSEMISSIONS CONTROL25-5
EMISSIONS CONTROL (Continued)

FUEL INJECTOR MECHANICAL MALFUNCTIONS
The PCM cannot determine if a fuel injector is
clogged, the needle is sticking or if the wrong injector
is installed. However, these could result in a rich or
lean condition causing the PCM to store a diagnostic
trouble code for either misfire, an oxygen sensor, or
the fuel system.
EXCESSIVE OIL CONSUMPTION
Although the PCM monitors engine exhaust oxygen
content when the system is in closed loop, it cannot
determine excessive oil consumption.
THROTTLE BODY AIR FLOW
The PCM cannot detect a clogged or restricted air
cleaner inlet or filter element.
VACUUM ASSIST
The PCM cannot detect leaks or restrictions in the
vacuum circuits of vacuum assisted engine control
system devices. However, these could cause the PCM
to store a MAP sensor diagnostic trouble code and
cause a high idle condition.
PCM SYSTEM GROUND
The PCM cannot determine a poor system ground.
However, one or more diagnostic trouble codes may
be generated as a result of this condition. The mod-
ule should be mounted to the body at all times,
including when diagnostics are performed.
PCM CONNECTOR ENGAGEMENT
The PCM may not be able to determine spread or
damaged connector pins. However, it might store
diagnostic trouble codes as a result of spread connec-
tor pins.
DESCRIPTION - MONITORED SYSTEMS
There are new electronic circuit monitors that
check fuel, emission, engine and ignition perfor-
mance. These monitors use information from various
sensor circuits to indicate the overall operation of the
fuel, engine, ignition and emission systems and thus
the emissions performance of the vehicle.
The fuel, engine, ignition and emission systems
monitors do not indicate a specific component prob-
lem. They do indicate that there is an implied prob-
lem within one of the systems and that a specific
problem must be diagnosed.
If any of these monitors detect a problem affecting
vehicle emissions, the Malfunction Indicator (Check
Engine) Lamp will be illuminated. These monitors
generate Diagnostic Trouble Codes that can be dis-
played with the a DRBIIItscan tool.
The following is a list of the system monitors:
²EGR Monitor (if equipped)²Misfire Monitor
²Fuel System Monitor
²Oxygen Sensor Monitor
²Oxygen Sensor Heater Monitor
²Catalyst Monitor
²Evaporative System Leak Detection Monitor (if
equipped)
Following is a description of each system monitor,
and its DTC.
Refer to the appropriate Powertrain Diagnos-
tics Procedures manual for diagnostic proce-
dures.
OXYGEN SENSOR (O2S) MONITOR
Effective control of exhaust emissions is achieved
by an oxygen feedback system. The most important
element of the feedback system is the O2S. The O2S
is located in the exhaust path. Once it reaches oper-
ating temperatures of 300É to 350ÉC (572É to 662ÉF),
the sensor generates a voltage that is inversely pro-
portional to the amount of oxygen in the exhaust.
The information obtained by the sensor is used to
calculate the fuel injector pulse width. The PCM is
programmed to maintain the optimum air/fuel ratio.
At this mixture ratio, the catalyst works best to
remove hydrocarbons (HC), carbon monoxide (CO)
and nitrous oxide (NOx) from the exhaust.
The O2S is also the main sensing element for the
EGR (if equipped), Catalyst and Fuel Monitors.
The O2S may fail in any or all of the following
manners:
²Slow response rate
²Reduced output voltage
²Dynamic shift
²Shorted or open circuits
Response rate is the time required for the sensor to
switch from lean to rich once it is exposed to a richer
than optimum A/F mixture or vice versa. As the sen-
sor starts malfunctioning, it could take longer to
detect the changes in the oxygen content of the
exhaust gas.
The output voltage of the O2S ranges from 0 to 1
volt (voltages are offset by 2.5 volts on NGC vehi-
cles). A good sensor can easily generate any output
voltage in this range as it is exposed to different con-
centrations of oxygen. To detect a shift in the A/F
mixture (lean or rich), the output voltage has to
change beyond a threshold value. A malfunctioning
sensor could have difficulty changing beyond the
threshold value.
OXYGEN SENSOR HEATER MONITOR
If there is an oxygen sensor (O2S) DTC as well as
a O2S heater DTC, the O2S heater fault MUST be
repaired first. After the O2S fault is repaired, verify
that the heater circuit is operating correctly.
25 - 6 EMISSIONS CONTROLRS
EMISSIONS CONTROL (Continued)

chemical reaction takes place. This means the con-
centration of oxygen will be the same downstream as
upstream. The output voltage of the downstream
O2S copies the voltage of the upstream sensor. The
only difference is a time lag (seen by the PCM)
between the switching of the O2S's.
To monitor the system, the number of lean-to-rich
switches of upstream and downstream O2S's is
counted. The ratio of downstream switches to
upstream switches is used to determine whether the
catalyst is operating properly. An effective catalyst
will have fewer downstream switches than it has
upstream switches i.e., a ratio closer to zero. For a
totally ineffective catalyst, this ratio will be one-to-
one, indicating that no oxidation occurs in the device.
The system must be monitored so that when cata-
lyst efficiency deteriorates and exhaust emissions
increase to over the legal limit, the MIL (Check
Engine lamp) will be illuminated.
NATURAL VACUUM LEAK DETECTION (NVLD) (if equipped)
The Natural Vacuum Leak Detection (NVLD) sys-
tem is the next generation evaporative leak detection
system that will first be used on vehicles equipped
with the Next Generation Controller (NGC). This
new system replaces the leak detection pump as the
method of evaporative system leak detection. This is
to detect a leak equivalent to a 0.0209(0.5 mm) hole.
This system has the capability to detect holes of this
size very dependably.
The basic leak detection theory employed with
NVLD is the9Gas Law9. This is to say that the pres-
sure in a sealed vessel will change if the temperature
of the gas in the vessel changes. The vessel will only
see this effect if it is indeed sealed. Even small leaks
will allow the pressure in the vessel to come to equi-
librium with the ambient pressure. In addition to the
detection of very small leaks, this system has the
capability of detecting medium as well as large evap-
orative system leaks.
The NVLD seals the canister vent during engine off
conditions. If the EVAP system has a leak of less than
the failure threshold, the evaporative system will be
pulled into a vacuum, either due to the cool down
from operating temperature or diurnal ambient tem-
perature cycling. The diurnal effect is considered one
of the primary contributors to the leak determination
by this diagnostic. When the vacuum in the system
exceeds about 19H2O (0.25 KPA), a vacuum switch
closes. The switch closure sends a signal to the NGC.
The NGC, via appropriate logic strategies (described
below), utilizes the switch signal, or lack thereof, to
make a determination of whether a leak is present.
The NVLD device is designed with a normally open
vacuum switch, a normally closed solenoid, and a
seal, which is actuated by both the solenoid and a
diaphragm. The NVLD is located on the atmosphericvent side of the canister. The NVLD assembly may
be mounted on top of the canister outlet, or in-line
between the canister and atmospheric vent filter. The
normally open vacuum switch will close with about 19
H2O (0.25 KPA) vacuum in the evaporative system.
The diaphragm actuates the switch. This is above the
opening point of the fuel inlet check valve in the fill
tube so cap off leaks can be detected. Submerged fill
systems must have recirculation lines that do not
have the in-line normally closed check valve that pro-
tects the system from failed nozzle liquid ingestion,
in order to detect cap off conditions.
The normally closed valve in the NVLD is intended
to maintain the seal on the evaporative system dur-
ing the engine off condition. If vacuum in the evapo-
rative system exceeds 39to 69H2O (0.75 to 1.5 KPA),
the valve will be pulled off the seat, opening the seal.
This will protect the system from excessive vacuum
as well as allowing sufficient purge flow in the event
that the solenoid was to become inoperative.
The solenoid actuates the valve to unseal the can-
ister vent while the engine is running. It also will be
used to close the vent during the medium and large
leak tests and during the purge flow check. This sole-
noid requires initial 1.5 amps of current to pull the
valve open but after 100 ms. will be duty cycled down
to an average of about 150 mA for the remainder of
the drive cycle.
Another feature in the device is a diaphragm that
will open the seal in the NVLD with pressure in the
evaporative system. The device will9blow off9at
about 0.59H2O (0.12 KPA) pressure to permit the
venting of vapors during refueling. An added benefit
to this is that it will also allow the tank to9breathe9
during increasing temperatures, thus limiting the
pressure in the tank to this low level. This is benefi-
cial because the induced vacuum during a subse-
quent declining temperature will achieve the switch
closed (pass threshold) sooner than if the tank had to
decay from a built up pressure.
The device itself has 3 wires: Switch sense, sole-
noid driver and ground. It also includes a resistor to
protect the switch from a short to battery or a short
to ground. The NGC utilizes a high-side driver to
energize and duty-cycle the solenoid.
DESCRIPTION - HIGH AND LOW LIMITS
The PCM compares input signal voltages from each
input device with established high and low limits for
the device. If the input voltage is not within limits
and other criteria are met, the PCM stores a diagnos-
tic trouble code in memory. Other diagnostic trouble
code criteria might include engine RPM limits or
input voltages from other sensors or switches that
must be present before verifying a diagnostic trouble
code condition.
25 - 8 EMISSIONS CONTROLRS
EMISSIONS CONTROL (Continued)

DIAGNOSIS AND TESTING - VEHICLE DOES
NOT FILL
CONDITION POSSIBLE CAUSES CORRECTION
Pre-Mature Nozzle Shut-Off Defective fuel tank assembly
components.Fill tube improperly installed
(sump)
Fill tube hose pinched.
Check valve stuck shut.
Control valve stuck shut.
Defective vapor/vent components. Vent line from control valve to
canister pinched.
Vent line from canister to vent
filter pinched.
Canister vent valve failure
(requires double failure,
plugged to NVLD and
atmosphere).
Leak detection pump failed
closed.
Leak detection pump filter
plugged.
On-Board diagnostics evaporative
system leak test just conducted.Canister vent valve vent
plugged to atmosphere.
engine still running when
attempting to fill (System
designed not to fill).
Defective fill nozzle. Try another nozzle.
Fuel Spits Out Of Filler
Tube.During fill. See Pre-Mature Shut-Off.
At conclusion of fill. Defective fuel handling
component. (Check valve stuck
open).
Defective vapor/vent handling
component.
Defective fill nozzle.
PCV VALVE
DESCRIPTION
The PCV valve contains a spring loaded plunger.
The plunger meters the amount of crankcase vapors
routed into the combustion chamber based on intake
manifold vacuum (Fig. 10) or (Fig. 11).
OPERATION
When the engine is not operating or during an
engine backfire, the spring forces the plunger back
against the seat. This prevents vapors from flowing
through the valve (Fig. 12).When the engine is at idle or cruising, high mani-
fold vacuum is present. At these times manifold vac-
uum is able to completely compress the spring and
pull the plunger to the top of the valve (Fig. 13). In
this position there is minimal vapor flow through the
valve.
During periods of moderate intake manifold vac-
uum the plunger is only pulled part way back from
the inlet. This results in maximum vapor flow
through the valve (Fig. 14).
25 - 16 EVAPORATIVE EMISSIONSRS
ORVR (Continued)

INDEX
ABS FASTENER TORQUE,
SPECIFICATIONS......................5-79
ABSORBER - DESCRIPTION, SHOCK.......2-37
ABSORBER - INSTALLATION, SHOCK......2-38
ABSORBER - OPERATION, SHOCK........2-37
ABSORBER - REMOVAL, SHOCK..........2-37
ABSORBER (UPPER BUSHING) -
ASSEMBLY, SHOCK....................2-38
ABSORBER (UPPER BUSHING) -
DISASSEMBLY, SHOCK.................2-37
A/C COMPRESSOR - DESCRIPTION......24-73
A/C COMPRESSOR - OPERATION........24-73
A/C COMPRESSOR CLUTCH COIL -
DIAGNOSIS AND TESTING.............24-15
A/C COMPRESSOR CLUTCH RELAY -
DESCRIPTION.......................24-19
A/C COMPRESSOR CLUTCH RELAY -
INSTALLATION.......................24-20
A/C COMPRESSOR CLUTCH RELAY -
OPERATION.........................24-19
A/C COMPRESSOR CLUTCH RELAY -
REMOVAL..........................24-20
A/C COMPRESSOR CLUTCH/COIL -
DESCRIPTION.......................24-15
A/C COMPRESSOR CLUTCH/COIL -
INSPECTION........................24-17
A/C COMPRESSOR CLUTCH/COIL -
INSTALLATION.......................24-17
A/C COMPRESSOR CLUTCH/COIL -
OPERATION.........................24-15
A/C COMPRESSOR CLUTCH/COIL -
REMOVAL..........................24-16
A/C COMPRESSOR MOUNTING BRACKET
- 2.4L ENGINE - INSTALLATION.........24-76
A/C COMPRESSOR MOUNTING BRACKET
- 2.4L ENGINE - REMOVAL.............24-75
A/C CONDENSER - DESCRIPTION........24-76
A/C CONDENSER - INSTALLATION.......24-78
A/C CONDENSER - OPERATION..........24-76
A/C CONDENSER - REMOVAL...........24-77
A/C COOL DOWN TEST - DIAGNOSIS
AND TESTING........................24-6
A/C DISCHARGE LINE - INSTALLATION . . . 24-80
A/C DISCHARGE LINE - REMOVAL.......24-79
A/C EVAPORATOR - DESCRIPTION . . 24-80,24-97
A/C EVAPORATOR - INSTALLATION......24-80
A/C EVAPORATOR - INSTALLATION,
REAR..............................24-99
A/C EVAPORATOR - OPERATION....24-80,24-97
A/C EVAPORATOR - REMOVAL..........24-80
A/C EVAPORATOR - REMOVAL, REAR.....24-97
A/C EVAPORATOR LINE EXTENSION -
INSTALLATION, REAR.................24-99
A/C EVAPORATOR LINE EXTENSION -
REMOVAL..........................24-98
A/C EXPANSION VALVE - DESCRIPTION . . . 24-99
A/C EXPANSION VALVE - DIAGNOSIS
AND TESTING.......................24-81
A/C EXPANSION VALVE - INSTALLATION . 24-100
A/C EXPANSION VALVE - OPERATION.....24-99
A/C EXPANSION VALVE - REMOVAL.....24-100
A/C HEATER CONTROL - DESCRIPTION . . . 24-20
A/C HEATER CONTROL - INSTALLATION . . . 24-21
A/C HEATER CONTROL - REMOVAL......24-21
A/C PERFORMANCE TEST - DIAGNOSIS
AND TESTING........................24-7
A/C PRESSURE TRANSDUCER -
DESCRIPTION.......................24-21
A/C PRESSURE TRANSDUCER -
DIAGNOSIS AND TESTING.............24-22
A/C PRESSURE TRANSDUCER -
INSTALLATION.......................24-22
A/C PRESSURE TRANSDUCER -
OPERATION.........................24-21
A/C PRESSURE TRANSDUCER -
REMOVAL..........................24-22
A/C SYSTEM, CAUTION................24-66
A/C SYSTEM, SPECIFICATIONS..........24-11
A/C SYSTEM, WARNING...............24-65
ACCELERATOR PEDAL - INSTALLATION . . . 14-24
ACCELERATOR PEDAL - REMOVAL
.......14-24
ACCESSORY DRIVE BELT - DIAGNOSIS
AND TESTING
.........................7-7
ACCESSORY DRIVE BELT TENSION,
SPECIFICATIONS
.......................7-5
ACCUMULATOR - DESCRIPTION
.......21-188,
21s-206,21s-94
ACCUMULATOR - OPERATION
....21-189,21s-94A/C-HEATER CONTROL - DESCRIPTION . . . 24-34
A/C-HEATER CONTROL - INSTALLATION . . . 24-35
A/C-HEATER CONTROL - OPERATION.....24-34
A/C-HEATER CONTROL - REMOVAL......24-34
A/C-HEATER CONTROL CALIBRATION -
STANDARD PROCEDURE...............24-20
ACTUATOR - DESCRIPTION, BLEND
DOOR........................24-23,24-35
ACTUATOR - DESCRIPTION, ENGAGE.....8N-10
ACTUATOR - DESCRIPTION, LATCH......8N-14
ACTUATOR - DESCRIPTION, MODE
DOOR.............................24-30
ACTUATOR - DESCRIPTION,
RECIRCULATION DOOR................24-32
ACTUATOR - INSTALLATION, BLEND
DOOR........................24-23,24-36
ACTUATOR - INSTALLATION, ENGAGE....8N-11
ACTUATOR - INSTALLATION, INSIDE
HANDLE............................23-27
ACTUATOR - INSTALLATION, LATCH.....8N-14
ACTUATOR - INSTALLATION, MODE
DOOR.............................24-31
ACTUATOR - INSTALLATION,
RECIRCULATION DOOR................24-33
ACTUATOR - OPERATION, BLEND DOOR . . 24-23,
24-35
ACTUATOR - OPERATION, ENGAGE......8N-11
ACTUATOR - OPERATION, LATCH........8N-14
ACTUATOR - OPERATION, MODE DOOR . . . 24-30
ACTUATOR - OPERATION,
RECIRCULATION DOOR................24-32
ACTUATOR - REAR - DESCRIPTION,
MODE DOOR........................24-39
ACTUATOR - REAR - INSTALLATION,
MODE DOOR........................24-40
ACTUATOR - REAR - OPERATION, MODE
DOOR.............................24-40
ACTUATOR - REAR - REMOVAL, MODE
DOOR.............................24-40
ACTUATOR - REMOVAL, BLEND DOOR . . . 24-23,
24-36
ACTUATOR - REMOVAL, ENGAGE........8N-11
ACTUATOR - REMOVAL, INSIDE HANDLE . . 23-27
ACTUATOR - REMOVAL, LATCH.........8N-14
ACTUATOR - REMOVAL, MODE DOOR....24-30
ACTUATOR - REMOVAL, RECIRCULATION
DOOR.............................24-33
ADAPTER - INSTALLATION, FRONT DISC
BRAKE CALIPER.................5-31,5s-30
ADAPTER - INSTALLATION, OIL FILTER . . . 9-139
ADAPTER - REMOVAL, FRONT DISC
BRAKE CALIPER.................5-31,5s-30
ADAPTER - REMOVAL, OIL FILTER.......9-139
ADAPTIVE MEMORIES, OPERATION -
FUEL CORRECTION OR................14-20
ADDING ADDITIONAL COOLANT -
STANDARD PROCEDURE.................7-5
ADDITIONAL COOLANT - STANDARD
PROCEDURE, ADDING...................7-5
ADHESIVE ATTACHED - INSTALLATION,
EXTERIOR NAME PLATES..............23-51
ADHESIVE ATTACHED - REMOVAL,
EXTERIOR NAME PLATES..............23-51
ADHESIVE LOCATIONS -
SPECIFICATIONS, STRUCTURAL
........23-156
ADJUSTABLE - INSTALLATION, PEDALS
. . . 5s-40
ADJUSTABLE - REMOVAL, PEDALS
.......5s-38
ADJUSTABLE PEDALS SWITCH -
INSTALLATION
.......................5s-10
ADJUSTABLE PEDALS SWITCH -
REMOVAL
..........................5s-10
ADJUSTER-BORC-PILLAR -
INSTALLATION, SEAT BELT HEIGHT
......8O-13
ADJUSTER-BORC-PILLAR -
REMOVAL, SEAT BELT HEIGHT
..........8O-13
ADJUSTER - DIAGNOSIS AND TESTING,
DRUM BRAKE AUTOMATIC
.........5-13,5s-13
ADJUSTER - INSTALLATION, FRONT
SEAT TRACK MANUAL
................23-95
ADJUSTER - INSTALLATION, FRONT
SEAT TRACK POWER
.................23-95
ADJUSTER - REMOVAL, FRONT SEAT
TRACK MANUAL
.....................23-95
ADJUSTER - REMOVAL, FRONT SEAT
TRACK POWER
......................23-95
ADJUSTER KNOB - INSTALLATION, SEAT
BELT HEIGHT
.......................8O-14ADJUSTER KNOB - REMOVAL, SEAT
BELT HEIGHT.......................8O-14
ADJUSTER NOISE DIAGNOSIS -
DIAGNOSIS AND TESTING, HYDRAULIC
LASH...............................9-34
ADJUSTER TENSION RELEASE -
STANDARD PROCEDURE, PARKING
BRAKE AUTOMATIC...............5-58,5s-61
ADJUSTER TENSION RESET -
STANDARD PROCEDURE, PARKING
BRAKE AUTOMATIC...............5-59,5s-61
ADJUSTERS - INSTALLATION,
HYDRAULIC LASH.....................9-34
ADJUSTERS - REMOVAL, HYDRAULIC
LASH...............................9-34
AERATION - DIAGNOSIS AND TESTING,
COOLING SYSTEM.....................7-3
AFTER AN AIRBAG DEPLOYMENT -
STANDARD PROCEDURE, SERVICE.......8O-3
AIR CLEANER ELEMENT - INSTALLATION . . 9-24,
9-98
AIR CLEANER ELEMENT - REMOVAL . . 9-24,9-98
AIR CLEANER HOUSING - INSTALLATION . . 9-24,
9-99
AIR CLEANER HOUSING - REMOVAL . . 9-24,9-99
AIR CONDITIONER - DESCRIPTION,
HEATER .............................24-1
AIR CONDITIONER - OPERATION,
HEATER .............................24-4
AIR CONTROL MOTOR - DESCRIPTION,
IDLE...............................14-28
AIR CONTROL MOTOR - INSTALLATION,
IDLE...............................14-29
AIR CONTROL MOTOR - OPERATION,
IDLE...............................14-28
AIR CONTROL MOTOR - REMOVAL, IDLE . . 14-29
AIR EXHAUSTER - DESCRIPTION, REAR
QUARTER PANEL/FENDER..............23-57
AIR EXHAUSTER - INSTALLATION, REAR
QUARTER PANEL/FENDER..............23-58
AIR EXHAUSTER - REMOVAL, REAR
QUARTER PANEL/FENDER..............23-57
AIR FILTER - DESCRIPTION............24-43
AIR FILTER - INSTALLATION............24-44
AIR FILTER - REMOVAL...............24-43
AIR GAP, SPECIFICATIONS - WHEEL
SPEED SENSOR.......................5-79
AIR INTAKE PIPE - INSTALLATION......24-114
AIR INTAKE PIPE - REMOVAL..........24-113
AIR OUTLETS - DESCRIPTION.....24-44,24-56
AIR OUTLETS - INSTALLATION..........24-56
AIR OUTLETS - REMOVAL.............24-56
AIR PRESSURE TESTS - DIAGNOSIS
AND TESTING, CLUTCH.........21-122,21s-30
AIR TEMPERATURE SENSOR -
DESCRIPTION, INLET.................14-30
AIRBAG - DESCRIPTION, DRIVER........8O-6
AIRBAG - DESCRIPTION, PASSENGER.....8O-8
AIRBAG - DESCRIPTION, SEAT..........8O-11
AIRBAG - INSTALLATION, DRIVER........8O-7
AIRBAG - INSTALLATION, PASSENGER . . . 8O-10
AIRBAG - OPERATION, DRIVER..........8O-6
AIRBAG - OPERATION, PASSENGER.......8O-9
AIRBAG - OPERATION, SEAT...........8O-11
AIRBAG - REMOVAL, DRIVER
............8O-6
AIRBAG - REMOVAL, PASSENGER
........8O-9
AIRBAG DEPLOYMENT - STANDARD
PROCEDURE, SERVICE AFTER AN
........8O-3
AIRBAG SYSTEM - DIAGNOSIS AND
TESTING
............................8O-2
AIRBAG TRIM COVER - INSTALLATION,
DRIVER
.............................8O-7
AIRBAG TRIM COVER - REMOVAL,
DRIVER
.............................8O-7
AIRBAGS - STANDARD PROCEDURE,
HANDLING
..........................8O-3
AJAR SWITCH - EXPORT -
INSTALLATION, HOOD
.................8Q-3
AJAR SWITCH - EXPORT - REMOVAL,
HOOD
..............................8Q-3
ALIGNMENT - DESCRIPTION, WHEEL
......2-47
ALIGNMENT - EXPORT - STANDARD
PROCEDURE, FRONT FOG LAMP UNIT
.....8L-9
ALIGNMENT - EXPORT - STANDARD
PROCEDURE, HEADLAMP UNIT
.........8L-14
ALIGNMENT - STANDARD PROCEDURE,
FRONT FOG LAMP UNIT
................8L-9
RSINDEX1
Description Group-Page Description Group-Page Description Group-Page