Chrysler RG Voyager. Manual — part 972
FUEL LEVEL SENDING UNIT /
SENSOR
DESCRIPTION
The fuel gauge level sending unit is attached to the
side of fuel pump module. The level sensor is a vari-
able resistor.
OPERATION
Its resistance changes with the amount of fuel in
the tank. The float arm attached to the sensor moves
as the fuel level changes.
The fuel level input is used as an input for OBD II.
If the fuel level is below 15% or above 85% of total
tank capacity several monitors are disabled. There
are diagnostics for the level circuit open and shorted.
REMOVAL
Remove fuel pump module. Refer to Fuel Pump
Module in this section.
(1) Depress retaining tab and remove the fuel
pump/level sensor connector from the BOTTOM of
the fuel pump module electrical connector (Fig. 2).
NOTE: The pump module harness on TOP of flange
is not serviceable or removable.
(2) Pull off the locking wedge.
(3) Using a small screwdriver lift locking finger
away from terminal and push terminal out of connec-
tor (Fig. 3).
(4) Push level sensor signal and ground terminals
out of the connector (Fig. 4).
O2S (Oxygen Sensor) Remover/Installer—C-4907
O2S (Oxygen Sensor) Remover/Installer - 8439
Fig. 2 Fuel Pump/Level Sensor Electrical Connector
1 - ELECTRICAL CONNECTOR
2 - RETAINING TAB
Fig. 3 Wire Terminal Locking Finger
1 - LOCKING FINGER
2 - WIRE TERMINAL
Fig. 4 Removing Wires From
1 - FUEL PUMP FEED (RED B+)
2 - LEVEL SENSOR SIGNAL
3 - LEVEL SENSOR GROUND
4 - FUEL PUMP GROUND (BK)
RS
FUEL DELIVERY
14 - 5
FUEL DELIVERY (Continued)
(5) Insert a screwdriver between the fuel pump
module and the top of the level sensor housing (Fig.
5). Push level sensor down slightly.
(6) Slide level sensor wires through opening fuel
pump module (Fig. 6).
(7) Slide level sensor out of installation channel in
module.
INSTALLATION
(1) Insert level sensor wires into bottom of opening
in module.
(2) Wrap wires into groove in back of level sensor
(Fig. 7).
(3) While feeding wires into guide grooves, slide
level sensor up into channel until it snaps into place
(Fig. 8). Ensure tab at bottom of sensor locks in
place.
Fig. 5 Loosening Level Sensor
1 - LEVEL SENSOR
2 - PRY DOWN ON LEVEL SENSOR
Fig. 6 Level Sensor Removal/Installation
1 - OPENING IN MODULE
2 - FUEL LEVEL SENSOR
Fig. 7 Groove in Back Side of Level Sensor
1 - WRAP WIRES IN GROOVE
2 - REAR VIEW OF LEVEL SENSOR
Fig. 8 Installation Channel
1 - CHANNEL FOR LEVEL SENSOR
2 - PUMP MODULE
14 - 6
FUEL DELIVERY
RS
FUEL LEVEL SENDING UNIT / SENSOR (Continued)
(4) Install level sensor wires in connector. Push
the wires up through the connector and then pull
them down until they lock in place. Ensure signal
and ground wires are installed in the correct posi-
tion.
(5) Install locking wedge on connector.
(6) Push connector up into bottom of fuel pump
module electrical connector.
(7) Install fuel pump module. Refer to Fuel Pump
Module in this section.
FUEL LINES
DESCRIPTION - FUEL LINES/HOSES AND
CLAMPS
Also refer to Quick-Connect Fittings.
WARNING: THE FUEL SYSTEM IS UNDER A CON-
STANT PRESSURE (EVEN WITH THE ENGINE OFF).
BEFORE SERVICING ANY FUEL SYSTEM HOSES,
FITTINGS OR LINES, THE FUEL SYSTEM PRES-
SURE MUST BE RELEASED. REFER TO THE FUEL
SYSTEM PRESSURE RELEASE PROCEDURE IN
THIS GROUP. THIS MAY RESULT IN PERSONAL
INJURY OR DEATH.
The lines/tubes/hoses used on fuel injected vehicles
are of a special construction. This is due to the
higher fuel pressures and the possibility of contami-
nated fuel in this system. If it is necessary to replace
these lines/tubes/hoses, use new original equipment
lines/tubes/hoses.
If equipped: The hose clamps used to secure rub-
ber hoses on vehicles are of a special rolled edge con-
struction. This construction is used to prevent the
edge of the clamp from cutting into the hose. Only
these rolled edge type clamps may be used in this
system. All other types of clamps may cut into the
hoses and cause leaks.
Use new original equipment type hose clamps.
STANDARD PROCEDURE - HOSES AND CLAMP
Inspect all hose connections (clamps and quick con-
nect fittings) for completeness and leaks. Replace
cracked, scuffed, or swelled hoses. Replace hoses that
rub against other vehicle components or show sign of
wear.
Fuel injected vehicles use specially constructed
hoses. When replacing hoses, only use hoses marked
EFM/EFI.
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) Squeeze tangs on pressure regulator retainer
and pull to remove 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.
RS
FUEL DELIVERY
14 - 7
FUEL LEVEL SENDING UNIT / SENSOR (Continued)
(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) Retaining tabs snap into 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).
FUEL PUMP MODULE
DESCRIPTION
The fuel pump module is installed in the top of the
fuel tank (Fig. 10), (Fig. 11), and (Fig. 12).
The fuel pump module contains the following:
• Electric fuel pump
• Fuel pump reservoir
• Inlet strainer
• Fuel pressure regulator
• Fuel gauge sending unit
Fig. 9 Fuel Pressure Regulator O-rings
1 - UPPER O-RING
2 - LOWER 0-RING
Fig. 10 LEVEL SENSOR - FOLD-IN-FLOOR
2 - FUEL PUMP MODULE
3 - PRESSURE REGULATOR
4 - FUEL LEVEL SENDER
Fig. 11 REGULATOR AND WIRING - FOLD-IN-FLOOR
2 - FUEL RESERVOIR
3 - PRESSURE REGULATOR
6 - GROUND STRAPS
14 - 8
FUEL DELIVERY
RS
FUEL PRESSURE REGULATOR (Continued)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст