Natural Vacuum Leak Detection Assembly: Removal

Fig 1: ORVR VAPOR LINE

Courtesy of DAIMLERCHRYSLER CORP.

The Natural Vacuum Leak Detection (NVLD) pump (3) and EVAP canister (1) are attached to a common support bracket. This support assembly is located to the rear of the right / rear tire under the plastic wheelhouse liner. The NVLD pump filter is also located near the EVAP canister. The pump and filter are replaced (serviced) as one unit. See Fig 1.

1. Remove right/rear tire/wheel.
2. Remove wheelhouse liner at right/rear wheel.
   Fig 2: EVAP CANISTER / LDP LOCATION

   Courtesy of DAIMLERCHRYSLER CORP.

   1 - RIGHT / REAR FENDER (WHEELHOUSE)

   2 - VERTICAL SUPPORT BRACKET

   3 - EVAP CANISTER

3. Remove vertical support bracket (2) to gain access to ORVR vapor lines. See Fig 2.
   Fig 3: ORVR VAPOR LINE

   Courtesy of DAIMLERCHRYSLER CORP.

   1 - EVAP CANISTER

   2 - NVLD FILTER

   3 - NVLD PUMP

   4 - VAPOR LINES

   5 - FLOW VALVE

   6 - TOP OF FUEL TANK)

4. A vapor line (4) connects the fuel tank to the EVAP canister and NVLD pump. This connection is made near the right/rear corner of the fuel tank. Carefully disconnect this line. Be very careful not to bend or kink the vapor lines. If lines leak, a Diagnostic Trouble Code (DTC) will be set. See Fig 3.
   Fig 4: COMMON SUPPORT BRACKET ASSEMBLY

   Courtesy of DAIMLERCHRYSLER CORP.

   1 - LDP FILTER

   2 - COMMON SUPPORT BRACKET

   3 - EVAP CANISTER NUTS (4)

   4 - EVAP CANISTER

   5 - LDP

   6 - LDP ELEC. CONNECT.

5. Remove common support bracket assembly (2) containing pump, pump filter and EVAP canister from vehicle. While lowering this assembly, disconnect pump electrical connector (6) at LDP pump. See Fig 4. Do not allow the assembly to hang from the wire harness. 
6. Carefully separate hose at bottom of pump filter.
7. Carefully remove vapor/vacuum lines at pump.
8. If necessary, remove pump filter mounting bolt and remove filter.
9. Remove EVAP canister from common support bracket by removing four nuts (3). See Fig 4.
   Fig 5: LDP MOUNTING BOLTS

   Courtesy of DAIMLERCHRYSLER CORP.

   1 - COMMON SUPPORT BRACKET

   2 - LDP MOUNTING BOLTS (3)

10. Remove three pump mounting bolts (2) and remove pump from support bracket. See Fig 5.