Rollover Valve(S); Leak Detection Pump (Ldp) - Dodge 2000 DURANGO Service Manual

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REMOVAL AND INSTALLATION (Continued)
Fig. 22 Duty Cycle EVAP Canister Purge Solenoid
1 – BRACKET NUTS (2)
2 – EVAP CANISTER PURGE SOLENOID
3 – EVAP SYSTEM TEST PORT (IF EQUIPPED)
4 – VACUUM LINES
5 – ELECTRICAL CONNECTOR

ROLLOVER VALVE(S)

Two rollover valves are used. One of the valves is
permanently mounted to top/rear of fuel tank (Fig.
23). If replacement of this particular valve is neces-
sary, the fuel tank must be replaced. Refer to Fuel
Tank Removal/Installation in Group 14, Fuel System.
The other rollover valve is located on top of the fuel
pump module (Fig. 23). This valve may be serviced
separately. Refer to following steps for procedures.
Fig. 23 Rollover Valve Locations
1 – FUEL PUMP MODULE
2 – FRONT ROLLOVER VALVE
3 – FUEL FILTER/FUEL PRESSURE REGULATOR
4 – FUEL TANK
5 – EVAP LINE
6 – REAR ROLLOVER VALVE
EMISSION CONTROL SYSTEMS
REMOVAL
WARNING: THE FUEL SYSTEM IS UNDER A CON-
STANT PRESSURE (EVEN WITH THE ENGINE OFF).
BEFORE SERVICING THE ROLLOVER VALVE(S),
FUEL SYSTEM PRESSURE MUST BE RELEASED.
REFER TO FUEL PRESSURE RELEASE PROCE-
DURE IN GROUP 14, FUEL SYSTEM.
(1) Disconnect negative battery cable at battery.
(2) Remove fuel filler cap and drain fuel tank.
(3) Remove fuel tank. Refer to Fuel Tank Removal/
Installation in Group 14, Fuel System.
(4) Disconnect tube (line) at valve.
(5) The rollover valve is seated into a rubber grom-
met. Remove valve by prying one side upward and
then roll valve out of grommet.
(6) Discard old grommet.
INSTALLATION
(1) Install new grommet into fuel pump module.
(2) Using finger pressure only, press valve into
place.
(3) Install fuel tank. Refer to Fuel Tank Installa-
tion.
(4) Fill fuel tank. Install fuel tank filler cap.
(5) Connect negative battery cable.
(6) Start vehicle and check for leaks.

LEAK DETECTION PUMP (LDP)

The LDP is located in the engine compartment
under the battery tray and Power Distribution Cen-
ter (PDC) (Fig. 24). The LDP filter is attached to the
outside of battery tray (Fig. 25). The LDP and LDP
filter are replaced (serviced) as one unit.
REMOVAL
(1) Disconnect negative battery cable at battery.
(2) Remove battery. Refer to Group 8A, Battery for
procedures.
(3) Carefully disconnect rubber hose from bottom
of LDP filter (Fig. 25).
(4) Remove clip retaining LDP filter to battery
tray (Fig. 25) and remove filter from tray.
(5) Disconnect battery temperature sensor pigtail
wiring harness at bottom of battery tray.
(6) To gain access to LDP, the PDC must be par-
tially removed. Remove PDC-to-fender mounting
screw at rear of PDC. Unsnap PDC from battery
tray. To prevent damage to PDC wiring, carefully
position PDC to gain access to LDP.
(7) Remove battery tray. Refer to Group 8A, Bat-
tery for procedures.
(8) Carefully remove vapor/vacuum lines at LDP.
(9) Disconnect electrical connector at LDP.
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