Emission Control System (1ZZ-FE): Canister: Inspection

INSPECT CHARCOAL CANISTER ASSEMBLY
1. Visually check the charcoal canister for cracks or damage.
  If cracks or damage are found, replace the charcoal canister assembly.
  
  Fig 1: Locating Charcoal Canister Portions For Checking Cracks Or Damage
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check 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 Flow From Air Inlet Port While Holding 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 Flow From Air Inlet Port While Holding Vent Port Closed
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the air leakage.
  1. Remove the air hose between ports A and B.
  2. Connect the pressure gauge to the vent port of the charcoal canister.
    SST 09992-00242
  3. While holding port B, the purge port and the air inlet port closed and port A open, apply pressurized air at 19.6 kPa (0.2 kgf/cm² , 2.81 psi) into the vent port, then confirm that the pressure is retained.
    If the result is not as specified, replace the charcoal canister assembly.
    
    Fig 4: Checking Air Leakage
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check 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 5: 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 6: Checking Valve In Closed Position
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002