Evaporative Emissions System: Service and Repair

REMOVAL




The Leak Detection Pump (LDP) (4) and LDP filter are attached to the front of the EVAP canister mounting bracket.

This is located near the front of the fuel tank. The LDP and LDP filter are replaced (serviced) as one unit.

1. Raise and support vehicle.
2. Certain models, equipped with a certain fuel tank size, may require the removal of the fuel tank skid plate and/or the transfer case skid plate to gain access to the leak pump. Remove necessary skid plates.
3. Carefully remove hose at LDP filter.
4. Remove LDP filter mounting bolt and remove from vehicle.
5. Carefully remove vapor/vacuum lines at LDP.
6. Disconnect electrical connector at LDR
7. Remove LDP mounting bolt and remove LDP from vehicle.

INSTALLATION




The LDP (4) and LDP filter are attached to the front of the EVAP canister mounting bracket. The LDP and LDP filter are replaced (serviced) as one unit.

1. Install LDP to mounting bracket. Refer to Torque Specifications.
2. Install LDP filter to mounting bracket. Refer to Torque Specifications.
3. Carefully install vapor/vacuum lines to LDP, and install hose to LDP filter. 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.
4. Connect electrical connector to LDP.
5. If necessary, install skid plate(s).