Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1732
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:
•
Electric fuel pump module
•
Fuel filter
•
Tubes/lines/hoses
•
Fuel 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 Module (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:
•
Ignition voltage
•
Crankshaft Position (CKP) sensor
•
Camshaft Position (CMP) sensor
DIAGNOSIS AND TESTING - FUEL DELIVERY SYSTEM
(Refer to Group 9 Engine for all Powertrain Diagnostic Information)
STANDARD PROCEDURE
STANDARD PROCEDURE - FUEL SYSTEM PRESSURE RELEASE PROCEDURE
1. Remove Fuel Pump relay from Power Distribution 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 scan tool must be used to erase a DTC.
STANDARD PROCEDURE - DRAINING FUEL TANK
1. Release the fuel pressure, refer to the Fuel Pressure Release Procedure in this section.
2. Disconnect negative battery cable.
NOTE: The fuel level of the vehicle must be below 5/8 of a tank before you remove the module lock-rings.
If it is above that you can spill fuel in the vehicle.
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FUEL DELIVERY
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3. Drain partial fuel from fuel tank through the filler
tube. Use a hard nylon tube, with a 30° cut on the
end, to push the check valve open to drain fuel
from tank.
4. Remove the rear lower seat cushion.
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FUEL DELIVERY
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5. Push seat back and up to remove seat cushion.
6. Fold back the foam pad covering access cover for
modules.
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7. Remove plastic access covers from floor pan left
side.
8. Disconnect the electrical connector from left side
module.
9. Mark the module orientation.
10. Use special tool #9340 to remove left side module
lock ring.
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