Emission Control: 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: Checking Canister For Cracks And Damage
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the canister operation.
  1. With the purge port closed, blow 0.39 kPa (4.0 kgf/cm² 0.06 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 assembly.
    
    Fig 2: Identifying Air Inlet Port, Purge Port And Vent Port
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. With the vent port closed, blow 0.39 kPa (4.0 kgf/cm² 0.06 psi) of air inlet port, and check that air flows from the purge port. If the result is not as specified, replace the canister assembly.
    
    Fig 3: Checking Air Flows And Purge Port
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the airtightness.
  1. While holding the vent and air inlet ports closed, apply vacuum (3.43 kPa, 25.7 mmHg, 1.01 in.Hg) to the purge port, and check that the vacuum is maintained for 1 minute. If the result is not as specified, replace the canister assembly.
    
    Fig 4: Checking Airtightness
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check the leak detection pump.
  1. Remove the detection pump from the 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 assembly.
    
    Fig 5: Checking Air Flow From Port A To B & 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 assembly.
  5. Install the detection pump.
    
    Fig 6: Checking Valve Closed
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002