Emission Control: Canister: Inspection

INSPECT CHARCOAL CANISTER ASSEMBLY
1. Visually check the charcoal canister for cracks and damage.
  If there is any cracks or damage, replace the charcoal canister assembly.
  
  Fig 1: Checking Charcoal Canister For Cracks And Damage
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the charcoal canister operation.
  1. While holding the purge port closed, blow air at 1.67 kPa (17.0 gf/cm² , 0.24 psi) into the vent port, and check that the air flows from the air inlet port.
    If the result is not as specified, replace the charcoal canister assembly
    
    Fig 2: Checking Air Flows From Air Inlet Port - Purge Port Closed
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. While holding the vent port closed, apply a vacuum of 1.10 kPa (8.3 mmHg, 0.32 in.Hg) into the purge port, and check that the air flows from the air inlet port.
    If the result is not as specified, replace the charcoal canister assembly
    
    Fig 3: Checking Air Flows From Air Inlet Port - Vent Port Closed
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check for air leakage.
  1. Remove the air hose between ports A and B.
    
    Fig 4: Locating Air Hose Between Ports A And B
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Connect the pressure gauge to the vent port of the charcoal canister.
  3. While holding port B, the purge port and air inlet port closed with your fingers, leave port A open and apply pressurized air at 19.6 kPa (0.2 kgf/cm² , 2.81 psi) into the vent port. Check that the pressure is retained.
    If the result is not as specified, replace the charcoal canister assembly
  Fig 5: Checking Pressure Is Retained
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check the leak detection pump.
  1. Check that air flows from port A to ports B and C.
    If the result is not as specified, replace the pump module.
    
    Fig 6: Checking Air Flows From Port A To Ports B And C
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Apply battery positive voltage across the terminals.
  3. Check that the valve is closed.
  If the result is not as specified, replace the pump module.
  
  Fig 7: Checking Valve Is Closed
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002