Auxiliary Emission Control Systems: Canister: Inspection

INSPECT CANISTER
1. Visually check the canister for cracks and damage.
  If cracks or damage are found, replace the canister.
  
  Fig 1: Locating Canister Connection
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the canister operation.
  1. While holding the purge port closed, blow air at 0.39 kPa (4.0 kgf/cm² , 3 mmHg) into the vent port, and check that air flows from the air inlet port.
    If the result is not as specified, replace the canister.
    
    Fig 2: Checking If Air Flows From Air Inlet Port
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. While holding the air inlet port closed, blow air at 0.39 kPa (4.0 kgf/cm² , 3 mmHg) into the vent port, and check that air flows from the purge port.
    If the result is not as specified, replace the canister.
    
    Fig 3: Checking If Air Flows From Purge Port
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. While holding the air inlet port closed, apply vacuum at 3.43 kPa (35.0 kgf/cm² , 25.7 mmHg) into the vent port, and check that air is sucked into the purge port.
    If the result is not as specified, replace the canister.
    
    Fig 4: Checking If Air Is Sucked Into Purge Port
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the air tightness.
  1. While holding the vent and air inlet ports closed, apply vacuum at 3.43 kPa (35.0 kgf/cm² , 25.7 mmHg) into the purge port, and check that the vacuum is maintained for 1 minute.
    If the result is not as specified, replace the canister.
    
    Fig 5: Checking Air Tightness
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check the diaphragm.
  1. Remove the air hose between ports A and B.
  2. While holding the vent, purge and air inlet ports closed, apply vacuum at 1.42 kPa (14.5 kgf/cm² , 10.6 mmHg) into port A, and check that air is not sucked into port B.
    
    Fig 6: Checking If Air Is Not Sucked Into Port B
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. While holding the vent, purge and air inlet ports closed, apply vacuum at 1.42 kPa (14.5 kgf/cm² , 10.6 mmHg) into port A, and measure how long it takes for the vacuum to drop.
    Vacuum drop time:
    
    10 seconds or more
    
    If the result is not as specified, replace the canister.
    
    Fig 7: Applying Vacuum Into Port A
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. 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 canister.
    
    Fig 8: Checking If Air Flows From Port A To Ports B & C
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Connect the positive (+) lead of the battery to terminal 7 and the negative (-) lead to terminal 6.
  3. Check that the valve is closed.
    If the result is not as specified, replace the canister.
  4. Install the canister pump module.
    
    Fig 9: Identifying Canister Pump Module Connector Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002