Auxiliary Emission Control Systems: Canister: Inspection

INSPECT CANISTER ASSEMBLY
1. Visually check the canister for cracks or damage.
  If cracks or damage are found, replace the canister assembly.
  
  Fig 1: Identifying Points For Checking Cracks Or Damage On Canister
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check canister operation.
  1. While holding the purge port closed, blow 1.67 kPa (17.0 gf/cm² , 0.24 psi) to the vent port, and check that the air flows from the air inlet port. If the result is not as specified, replace the canister assembly.
    
    Fig 2: Identifying Air Flows From Air Inlet Port
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. While holding the vent port closed, blow 1.10 kPa (11.2 gf/cm² , 0.16 psi) to the air inlet port, and check that the air flows from the purge port.
    If the result is not as specified, replace the canister assembly.
    
    Fig 3: Identifying Air Flows From Purge Port
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the air leakage.
  1. Remove the air hose between ports A and B.
  2. Connect SST (pressure gauge) to the vent port of the canister.
    SST 09992-00242
  3. While holding port B, the purge port and the air inlet port closed, apply 19.6 kPa (0.2 kgf/cm² , 2.81 psi) to the vent port, and then confirm that the pressure is retained.
    If the result is not as specified, replace the canister assembly.
    
    Fig 4: Identifying SST (Pressure Gauge) To Vent Port Of Canister
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002