Emission Control: 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: Identifying Charcoal Canister Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check charcoal canister operation.
  1. With the purge port closed, blow 1.67 kPa (17.0 gf/cm² , 0.24 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 charcoal canister assembly.
    
    Fig 2: Checking Air Flows From Air Inlet Port
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. With the vent port closed, blow 1.10 kPa (11.2 gf/cm² , 0.16 psi) of air to the air inlet port, and check that air flows from the purge port. If the result is not as specified, replace the charcoal canister assembly.
    
    Fig 3: Checking Air Flows From Purge Port (With Vent Port Closed)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check for air leakage.
  1. Remove the air hose between ports A and B.
  2. Connect the SST (pressure gauge) to the vent port of the charcoal canister.
    SST 09992-00242
  3. While holding port B, with the purge port and the air inlet port closed and port A open, apply 19.6 kPa (0.2 kgf/cm² , 2.81 psi) of pressurized air into the vent port, then confirm that pressure is retained for 1 minute. If the result is not as specified, replace the charcoal canister assembly.
    
    Fig 4: Connecting SST (Pressure Gauge) To Vent Port Of Charcoal Canister
    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 C.
    If the result is not as specified, replace the charcoal canister assembly.
    
    Fig 5: Checking Air Flows From Port A To B And C
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Connect the positive (+) lead 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 charcoal canister assembly.
  5. Install the detection pump.
    
    Fig 6: Checking Valve Is Closed
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002