Auxiliary Emission Control Systems: Canister: Inspection

INSPECT CANISTER
1. Visually check the canister for cracks or damage. If cracks or damage is found, replace the canister.
  
  Fig 1: Locating Canister Inspection Points
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the canister operation.
  1. With the purge port closed, blow air at 1.10 kPa (11.2 kgf/cm² , 0.16 psi) 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 Flows From Air Inlet Port
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. With the vent port closed, blow air at 1.10 kPa (11.2 kgf/cm² , 0.16 psi) into the 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 Flows From Purge Port
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check for air leakage.
  1. With the purge port and air inlet port closed, apply pressurized air at 19.6 kPa (0.2 kgf/cm² , 2.81 psi) into the vent port, and then confirm that pressure is retained for 1 minute.
    If the result is not as specified, replace the canister.
    
    Fig 4: Checking Air Leakage
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check the leak detection pump.
  1. Remove the detection pump from the charcoal canister.
  2. Check that air flows from port A to B and then to C.
    If the result is not as specified, replace the canister.
    
    Fig 5: Checking Air Flows From Port A To B And Then To C
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Connect the positive (+) lead of the battery to terminal 7 and the negative (-) lead to terminal 6.
  4. Check that the valve is closed.
    If the result is not as specified, replace the canister.
  5. Install the detection pump.
    
    Fig 6: Checking Valve Closed Position
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002