Toyota
Dodge Durango
 Service Manual
Emission Control Systems » Evaporative emission controls » Removal and installation
Leak detection pump (ldp)

The LDP is located in the engine compartment under the battery tray and Power Distribution Center (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 partially 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, Battery for procedures.

(8) Carefully remove vapor/vacuum lines at LDP.

(9) Disconnect electrical connector at LDP.

Fig. 24 Leak Detection Pump (LDP) Location Fig. 24 Leak Detection Pump (LDP) Location

1 - BATTERY

2 - LEAK DETECTION PUMP (LDP)

Fig. 25 LDP Filter Location Fig. 25 LDP Filter Location

1 - LDP FILTER

2 - LDP FILTER-TO-LDP HOSE

3 - BATTERY TRAY

4 - LDP MOUNTING CLIP

(10) Remove 3 LDP mounting screws (Fig. 26) and remove LDP from vehicle.

INSTALLATION

(1) Install LDP to bottom of battery tray. Tighten screws to 1 N*m (11 in. lbs.) torque.

(2) Carefully install vapor/vacuum lines to LDP.

Fig. 26 Leak Detection Pump (LDP) Mounting Screws Fig. 26 Leak Detection Pump (LDP) Mounting Screws

1 - BATTERY TRAY

2 - LDP

3 - LDP MOUNTING SCREWS (3)

The vapor/vacuum lines and hoses must be firmly connected. Check the vapor/vacuum lines at the LDP, LDP filter and EVAP canister purge solenoid for damage or leaks. If a leak is present, a Diagnostic Trouble Code (DTC) may be set.

(3) Connect electrical connector to LDP.

(4) Install battery tray. Refer to Group 8A, Battery for procedures.

(5) Install PDC to fender and battery tray (snaps on to battery tray).

(6) Install LDP filter to battery tray (one clip).

(7) Install connecting hose to bottom of LDP filter.

(8) Connect battery temperature sensor pigtail wiring harness.

(9) Install battery. Refer to Group 8A, Battery for procedures.

(10) Connect negative battery cable to battery.

Specifications

TORQUE CHART

Description - Torque

EVAP Canister Mounting Nut . . . . . . . . 17-24 N*m (150-210 in. lbs.)

EVAP Canister Purge Solenoid Mounting Bolt . . . . . . . . . . . . . . . . . . . . 11 N*m (95 in. lbs.)

Leak Detection Pump (LDP) Mounting Screws . . . . . . . . . . . . . . . . . . 1 N*m (11 in. lbs.)

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