CANISTER INSPECTION

PROCEDURE


  1. INSPECT CHARCOAL CANISTER ASSEMBLY (for Metal Type)

    Note

    When applying vacuum, the needle may waver but, as long as the needle returns to its initial position immediately, it is not a malfunction.


    1. Visually check the charcoal canister assembly for cracks or damage.

      If cracks or damage is found, replace the charcoal canister assembly.

    2. Check the air flow.


      1. A004KRGE02
        Text in Illustration
        *1 Port A
        *2 Port B
        *3 Port C

        Using a vacuum pump, check the air flow according to the procedures below.

        OK
        Measurement Condition Specified Condition
        Ports B and C closed, and vacuum applied to port A (2 kPa (15 mmHg, 0.590 in.Hg)) No air leaks
        Port C closed, and vacuum applied to port A (2 kPa (15 mmHg, 0.590 in.Hg)) Air flows from port B

        Port C closed and air blown into port A (5 kPa (0.1 kgf/cm2, 0.725 psi))

        		 Air flows from port B

        Air blown into port A (5 kPa (0.1 kgf/cm2, 0.725 psi))

        		 Air flows from ports B and C

        If the result is not as specified, replace the charcoal canister assembly.

  2. INSPECT CHARCOAL CANISTER ASSEMBLY (for Clamp Type)

    Note

    When applying vacuum, the needle may waver but, as long as the needle returns to its initial position immediately, it is not a malfunction.


    1. Visually check the charcoal canister assembly for cracks or damage.

      If cracks or damage is found, replace the charcoal canister assembly.

    2. Check the air flow.


      1. A004HN1E02
        Text in Illustration
        *1 Port A
        *2 Port B
        *3 Port C

        Using a vacuum pump, check the air flow according to the procedures below.

        OK
        Measurement Condition Specified Condition
        Ports B and C closed, and vacuum applied to port A (2 kPa (15 mmHg, 0.590 in.Hg)) No air leaks
        Port C closed, and vacuum applied to port A (2 kPa (15 mmHg, 0.590 in.Hg)) Air flows from port B

        Port C closed and air blown into port A (5 kPa (0.1 kgf/cm2, 0.725 psi))

        		 Air flows from port B

        Air blown into port A (5 kPa (0.1 kgf/cm2, 0.725 psi))

        		 Air flows from ports B and C

        If the result is not as specified, replace the charcoal canister assembly.

  3. INSPECT CANISTER PUMP MODULE (for Metal Type)


    1. A004H3AE02
      Text in Illustration
      *a

      Component without harness connected

      (Canister Pump Module)

      Measure the resistance according to the value in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 5 20°C (68°F) 25 to 30 Ω
      1 - 5 60°C (140°F) 27 to 35 Ω

    2. Check the operation of the check valve.


      1. A004KQGE02
        Text in Illustration
        *1 Port A
        *2 Port B

        Install a clean hose to the purge valve.

      2. Check that air flows from port A to port B.

      3. A004H0NE03
        Text in Illustration
        *1 Port A
        *2 Port B
        *a

        Component without harness connected

        (Canister Pump Module)

        Connect the positive (+) lead of the battery to terminal 5 and the negative (-) lead to terminal 1.

      4. Check that air does not flow from port A to port B.

      5. A004I0BE02
        Text in Illustration
        *a

        Component without harness connected

        (Canister Pump Module)

        Connect the positive (+) lead of the battery to terminal 3 and the negative (-) lead to terminal 4.

      6. Check that the vacuum pump operates.

        Note

        Do not operate vacuum pump for 5 minutes or more.

      7. A004KHPE02
        Text in Illustration
        *1 1.5 V
        *2 4.8 to 5.2 V
        *a

        Component without harness connected

        (Canister Pump Module)

        Connect the positive (+) lead of the battery to terminal 6 and the negative (-) lead to terminal 8.

      8. Measure the voltage according to the value in the table below.

        Standard Voltage
        Tester Connection Condition Specified Condition
        7 - 8 25°C (77°F) 3.5 V
      9. A004JZBE03
        Text in Illustration
        *1 1.5 V
        *2 4.8 to 5.2 V
        *a

        Component without harness connected

        (Canister Pump Module)

        Connect the positive (+) lead of the battery to terminal 6 and the negative (-) lead to terminal 8.

      10. Connect the positive (+) lead of the battery to terminal 3 and the negative (-) lead to terminal 4. Check that the voltage drops slightly from 3.5 volts.