Emission Control System: 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: Inspecting For Charcoal Canister Cracks & Damage
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the charcoal canister operation.
  1. While holding the purge port closed, blow pressurized 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 Charcoal Canister Operation
    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
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check for air leakage.
  1. Remove the air hose between ports A and B.
    
    Fig 4: Removing Air Hose Between Ports A & B
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Connect the pressure gauge to the vent port of the charcoal canister.
    SST 09992-00242
    
    Fig 5: Connecting Pressure Gauge To Vent Port Of Charcoal Canister
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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.
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 & 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: Applying Battery Positive Voltage Across Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002