Emission Control System: Canister: Inspection

INSPECT CANISTER
1. Visually check the canister for cracks or damage. If cracks or damage are found, replace the canister.
  
  Fig 1: Locating Canister Cracks And Damage Points
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the canister operation.
  1. With the purge port closed, blow 2 kPa (20 gf/cm² , 0.3 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 canister.
    
    Fig 2: Checking Air Inlet Port
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. With the vent port closed, blow 1 kPa (10 gf/cm² , 0.2 psi) of air inlet port, and check that air flows from the purge port.
    If the result is not as specified, replace the canister.
    
    Fig 3: Checking Air Inlet Port
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check for air leaks.
  1. Remove the air hose between ports A and B.
  2. Connect a pressure gauge to the vent port of the canister.
  3. With port B, the purge port and air inlet port closed and port A open, apply 20 kPa (0.2 kgf/cm² , 2.9 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 canister.
    
    Fig 4: Connecting Pressure Gauge To Vent Port Of Canister
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002