VAPOR CANISTER
DESCRIPTION
The canister mounts to a left rear rail in the rear of the vehicle. The vacuum and vapor tube connect to the top of the canister.
OPERATION
All vehicles use a maintenance free, evaporative (EVAP) canister. Fuel tank vapors vent into the canister. The canister temporarily holds the fuel vapors until intake manifold vacuum draws them into the combustion chamber. The Powertrain Control Module (PCM) purges the canister through the proportional purge solenoid. The PCM purges the canister at predetermined intervals and engine conditions.
Purge Free Cells
Purge-free memory cells are used to identify the fuel vapor content of the evaporative canister. Since the evaporative canister is not purged 100% of the time, the PCM stores information about the evaporative canister's vapor content in a memory cell.
The purge-free cells are constructed similar to certain purge-normal cells. The purge-free cells can be monitored by the scan tool. The only difference between the purge-free cells and normal adaptive cells is that in purge-free, the purge is completely turned off. This gives the PCM the ability to compare purge and purge-free operation.
REMOVAL
1. Disconnect negative battery cable.
2. Raise and support vehicle.
3. Depress locking tab on vapor hose connector and pull off of canister.
4. Remove hose from ESIM module.
5. Vapor hose removed.
6. Disconnect the electrical connector from ESIM module.
7. Remove two vapor canister mounting bolts.
8. Remove assembly.
INSTALLATION
1. Install canister and bracket.
2. Connect filter hose to ESIM.
3. Connect vapor hose.
4. Make sure locking tab on hose connector locks in place.
5. Connect electrical connector to ESIM module.
6. Lower vehicle.
7. Connect negative battery cable.