Emission Control: Canister: Inspection

INSPECT CHARCOAL CANISTER ASSEMBLY
1. Visually check the charcoal canister for cracks or damage.
  If cracks or damage are found, replace the charcoal canister.
  
  Fig 1: Checking Charcoal Canister Assembly For Leakage
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check canister operation.
  1. With the purge port closed, blow 1.80 kPa (0.018 kgf/cm² , 0.261 psi) of air into the vent port, and check that air flows from the air inlet port.
    If the result is not as specified, replace the charcoal canister.
    
    Fig 2: Checking Air Flows From Air Inlet Port
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. With the vent port closed, blow 1.10 kPa (0.011 kgf/cm² , 0 16 psi) of air into the air inlet port, and check that air flows from the purge port. If the result is not as specified, replace the charcoal canister.
  Fig 3: Checking Air Flows From Purge Port
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check for air leaks.
  1. Remove the air hose between ports A and B.
  2. Connect the SST (pressure gauge) to the vent port of the charcoal canister.
    SST 09992-00242
    
    Fig 4: Connecting SST To Vent Port Of Charcoal Canister
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. While holding port B, with the purge port and the air inlet port closed and port A open, apply 19.6 kPa (0.2 kgf/cm² , 2 81 psi) of pressurized air into the vent port, then confirm that pressure is retained for 1 minute
  If the result is not as specified, replace the charcoal canister.