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EVAP System: Wiring Diagram

Refer to DTC P0450  .

NOTE: The intelligent tester is required to conduct the following diagnostic troubleshooting procedure.

HINT:

  1. CONFIRM DTC 
    1. Turn the engine switch off and wait for 10 seconds.
    2. Turn the engine switch on (IG).
    3. Turn the engine switch off and wait for 10 seconds.
    4. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
    5. Turn the engine switch on (IG).
    6. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
    7. Confirm DTCs and freeze frame data.

      If any EVAP system DTCs are set, the malfunctioning area can be determined using the table below.

      NOTE: If the 0.02 inch reference pressure difference between the first and second checks is greater than the specification, the DTCs corresponding to the reference pressure (P043E, P043F, P0441, P0455, P0456, P2401 and P2420) will all be stored.
      Fig 1: Malfunctioning Area Chart
      G04054840Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NEXT 

  2. PERFORM EVAP SYSTEM CHECK (AUTO OPERATION) 
    NOTE:
    • In the EVAP SYSTEM CHECK (AUTO OPERATION), the series of 5 EVAP SYSTEM CHECK step are performed automatically. It takes a maximum of approximately 18 minutes.
    • Do not perform the EVAP SYSTEM CHECK when the fuel tank is more than 90% full because the cut-off valve may be closed, making the leak check of the fuel tank unavailable.
    • Do not run the engine in this step.
    • When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the EVAP SYSTEM CHECK, keep the temperature below 35°C (95°F).
    1. Clear the DTCs (See DIAGNOSIS SYSTEM  ).
    2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.
    3. After the EVAP SYSTEM CHECK is completed, check for pending DTCs by entering the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.

      HINT:

      If no pending DTC is displayed, perform the Monitor Confirmation after the repair is completed. After this confirmation, check for pending DTCs. If no DTC is displayed, the EVAP system is normal.

    NEXT 

  3. PERFORM EVAP SYSTEM CHECK (MANUAL OPERATION) 
    Fig 2: EVAP System Checking Graph (Manual Operation)
    G04054841Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:
    • In the EVAP SYSTEM CHECK (MANUAL OPERATION), the series of 5 EVAP SYSTEM CHECK step are performed manually.
    • Do not perform the EVAP SYSTEM CHECK when the fuel tank is more than 90% full because the cut-off valve may be closed, making the leak check of the fuel tank unavailable.
    • Do not run the engine in this step.
    • When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the EVAP SYSTEM CHECK, keep the temperature below 35°C (95°F).
    1. Clear the DTCs (See DIAGNOSIS SYSTEM  ).
    2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / MANUAL OPERATION.

    NEXT 

  4. PERFORM EVAP SYSTEM CHECK (STEP 1/5) 
    Fig 3: EVAP System Checking Graph (Step 1/5)
    G04054842Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the EVAP pressure in step 1/5.

      Result 

      RESULT REFERENCE

      DTC No. (1) Test Result Suspected Trouble Area Proceed to
      - Virtually no variation in EVAP pressure Not yet determined A
      P0451 EVAP pressure fluctuates by +-0.3 kPa (2.25 mmHg) or more Pressure sensor noise B
      (1) The DTCs related to the EVAP system are displayed on the intelligent tester when checking.

    B : Go to step   30 

    A : GO TO NEXT STEP 

  5. PERFORM EVAP SYSTEM CHECK (STEP 1/5 TO 2/5) 
    Fig 4: EVAP System Checking Graph (Step 1/5 To 2/5)
    G04054843Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the EVAP pressure in step 1/5 and 2/5.

      Result 

      RESULT REFERENCE

      DTC No. (1) Test Result Suspected Trouble Area Proceed to
      - Virtually no variation in EVAP pressure during step 1/5. Then decreases to 0.02 inch leak pressure standard Not yet determined A
      P2402 Small difference between EVAP pressures during steps 1/5 and 2/5 Vacuum pump stuck ON B
      (1) The DTCs related to the EVAP system are displayed on the intelligent tester when checking.

      HINT:

      The first 0.02 inch leak pressure standard is the value determined in step 2/5.

    B : Go to step   23 

    A : GO TO NEXT STEP 

  6. PERFORM EVAP SYSTEM CHECK (STEP 2/5) 
    Fig 5: EVAP System Checking Graph (Step 2/5)
    G04054844Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    Make a note of the pressures checked in the steps below.

    1. Check the EVAP pressure 4 seconds after the vacuum pump is activated*.
    2. Check the EVAP pressure again when it has stabilized. This pressure is the 0.02 inch leak pressure standard.

      *: The vacuum pump begins to operate as step 1/5 is proceeded to step 2/5.

      Result 

      RESULT REFERENCE

      DTC No. (1) Test Result Suspected Trouble Area Proceed to
      - EVAP pressure in step (b) between -4.85 kPa and -1.06 kPa (-36.38 mmHg and -7.95 mmHg) Not yet determined A
      P043F and P2401 EVAP pressure in step (b) -1.06 kPa (-7.95 mmHg) or more
      • 0.02 inch orifice high-flow
      • Vacuum pump stuck OFF
      		 B
      P043E EVAP pressure in step (b) below -4.85 kPa (- 36.38 mmHg) 0.02 inch orifice clogged C
      P2419 EVAP pressure in step (a) more than -1.06 kPa (-7.95 mmHg) Vent valve stuck closed D
      (1) The DTCs related to the EVAP system are displayed on the intelligent tester when checking.

    B : Go to step   11 

    C : Go to step   30 

    D : Go to step   19 

    A : Go to next step 

  7. PERFORM EVAP SYSTEM CHECK (STEP 2/5 TO 3/5) 
    Fig 6: EVAP System Checking Graph (Step 2/5 To 3/5)
    G04054845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the EVAP pressure in step 3/5.

      Result 

      RESULT REFERENCE

      DTC No.(1) Test Result Suspected Trouble Area Proceed to
      - EVAP pressure increases by 0.3 kPa (2.25 mmHg) or more within 10 seconds of proceeding from step 2/5 to step 3/5 Not yet determined A
      P2420 No variation in EVAP pressure despite proceeding from step 2/5 to step 3/5 Vent valve stuck open (vent) B
      P0451 No variation in EVAP pressure during steps 1/5 through 3/5 Pressure sensor malfunction (stuck) C
      (1) The DTCs related to the EVAP system are displayed on the intelligent tester when checking.

    B : Go to step   20 

    C : Go to step   30 

    A : GO TO NEXT STEP 

  8. PERFORM EVAP SYSTEM CHECK (STEP 3/5) 
    Fig 7: EVAP System Checking Graph (Step 3/5)
    G04054846Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Wait until the EVAP pressure change is less than 0.1 kPa (0.75 mmHg) for 30 seconds.
    2. Measure the EVAP pressure and record it.

      HINT:

      A few minutes are required for the EVAP pressure to become saturated. When there is little fuel in the fuel tank, it takes up to 15 minutes.

    NEXT 

  9. PERFORM EVAP SYSTEM CHECK (STEP 4/5) 
    Fig 8: EVAP System Checking Graph (Step 4/5)
    G04054847Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the EVAP pressure in step 4/5.

      Result 

      RESULT REFERENCE

      DTC No. (1) Test Result Suspected Trouble Area Proceed to
      - EVAP pressure increases by 0.3 kPa (2.25 mmHg) or more within 10 seconds of proceeding from step 3/5 to step 4/5 Not yet determined A
      P0441 EVAP pressure increases by 0.3 kPa (2.25 mmHg) or more within 10 seconds of proceeding from step 3/5 to step 4/5 Problems in EVAP hose between EVAP VSV and intake manifold B
      P0441 Variation in EVAP pressure less than 0.3 kPa (2.25 mmHg) for 10 seconds, after proceeding from step 3/5 to step 4/5 EVAP VSV stuck closed C
      (1) The DTCs related to the EVAP system are displayed on the intelligent tester when checking.

    B : Go to step   15 

    C : Go to step   12 

    A : GO TO NEXT STEP 

  10. PERFORM EVAP SYSTEM CHECK (STEP 5/5) 
    Fig 9: EVAP System Checking Graph (Step 5/5)
    G04054848Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the EVAP pressure in step 5/5.
    2. Compare the EVAP pressure in step 3/5 and the second 0.02 inch leak pressure standard (step 5/5).

      Result 

      RESULT REFERENCE

      DTC No. (1) Test Result Suspected Trouble Area Proceed to
      - EVAP pressure (step 3/5) lower than second 0.02 inch leak pressure standard (step 5/5) Not yet determined A
      P0441 and P0455 EVAP pressure (step 3/5) higher than [second 0.02 inch leak pressure standard (step 5/5) x 0.2]
      • EVAP VSV stuck open
      • EVAP gross leak
      		 B
      P0456 EVAP pressure (step 3/5) higher than second 0.02 inch leak pressure standard (step 5/5) EVAP small leak C
      (1) The DTCs related to the EVAP system are displayed on the intelligent tester when checking.

    A : Go to step   36 

    B : Go to step   12 

  11. PERFORM EVAP SYSTEM CHECK (STEP 3/5) 
    Fig 10: EVAP System Checking Graph (Step 3/5)
    G04054849Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the EVAP pressure in step 3/5.

      Result 

      RESULT REFERENCE

      DTC No. (1) Test Result Suspected Trouble Area Proceed to
      P043F EVAP pressure less than [0.02 inch leak pressure standard] measured at 2/5 0.02 inch orifice high-flow A
      P2401 EVAP pressure almost same as [0.02 inch leak pressure standard] measured at 2/5 Vacuum pump stuck OFF B
      (1) The DTCs related to the EVAP system are displayed on the intelligent tester when checking.

      HINT:

      The first 0.02 inch leak pressure standard is the value determined in step 2/5.

    A : Go to step   30 

    B : Go to step   23 

  12. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (EVAP VSV) 
    1. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / EVAP VSV.
    2. Disconnect the hose (connected to the canister) from the EVAP VSV.
    3. Turn the engine switch on (IG).
    4. Using the tester, turn the EVAP VSV OFF.
    5. Use your finger to confirm that the EVAP VSV has no suction.
    6. Using the tester, turn the EVAP VSV ON.
    7. Use your finger to confirm that the EVAP VSV has suction.
      Fig 11: Disconnecting Hose (Connected To Canister) From EVAP VSV
      G04054850Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT REFERENCE

      Test Result Suspected Trouble Area Proceed to
      No suction when EVAP VSV turned OFF, and suction applied when turned ON EVAP VSV normal A
      Suction applied when EVAP VSV turned OFF EVAP VSV stuck open B
      No suction when EVAP VSV turned ON
      • EVAP VSV stuck closed
      • Problems with EVAP hose between EVAP VSV and intake manifold
      		 C

    B : Go to step   14 

    C : Go to step   15 

    A : Go to next step 

  13. CHECK FUEL TANK CAP 
    1. Check that the fuel tank cap is correctly installed.
    2. Confirm that the fuel tank cap is tightened until a few click sounds are heard.

      HINT:

      If an EVAP tester is available, check the fuel tank cap using the tester.

      1. Remove the fuel tank cap and install it onto the fuel tank cap adaptor.
      2. Connect an EVAP tester pump hose to the adaptor, and pressurize the cap to 3.2 to 3.7 kPa (24 to 28 mmHg) using an EVAP tester pump.
      3. Seal the adaptor and wait for 2 minutes.
      4. Check the pressure. If the pressure is 2 kPa (15 mmHg) or more, the fuel tank cap is normal.

        Result 

        RESULT REFERENCE

        Test Result Suspected Trouble Area Proceed to
        Fuel tank cap correctly installed - A
        Fuel tank cap loose
        • Fuel tank cap improperly installed
        • Defective fuel tank cap
        • Fuel tank cap does not meet OEM specifications
        		 B
        No fuel tank cap - C

    A : Go to step   29 

    B : Go to step   27 

    C : Go to step   28 

  14. INSPECT DUTY VACUUM SWITCHING VALVE (EVAP VSV) 
    1. Turn the engine switch off.
    2. Disconnect the E15 EVAP VSV connector.
    3. Disconnect the hose (connected to the canister) from the EVAP VSV.
    4. Start the engine.
    5. Use your finger to confirm that the EVAP VSV has no suction.

      Result 

      RESULT REFERENCE

      Test Result Suspected Trouble Area Proceed to
      No suction ECM A
      Suction applied EVAP VSV B
      Fig 12: Disconnecting Hose (Connected To Canister) From EVAP VSV
      G04054851Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    A : Go to step   35 

    B : Go to step   31 

  15. CHECK EVAP HOSE (EVAP VSV - THROTTLE BODY) 
    1. Disconnect the hose (connected to the throttle body) from the EVAP VSV.
    2. Turn the engine switch on (IG).
    3. Use your finger to confirm that the hose has suction.

      Result 

      RESULT REFERENCE

      Test Result Suspected Trouble Area Proceed to
      Suction applied EVAP hose between EVAP VSV and throttle body normal A
      No suction
      • Intake manifold port
      • EVAP hose between EVAP VSV and throttle body
      		 B
      Fig 13: Disconnecting Hose (Connected To Throttle Body) From EVAP VSV
      G04054852Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reconnect the hose.

    B : Go to step   26 

    A : GO TO NEXT STEP 

  16. INSPECT DUTY VACUUM SWITCHING VALVE (EVAP VSV) 
    1. Remove the EVAP VSV connector.
    2. Apply battery voltage to the terminals of the EVAP VSV.
    3. Using an air gun, confirm that air flows from port A to port B.

      Result 

      RESULT REFERENCE

      Test Result Suspected Trouble Area Proceed to
      Air flows EVAP VSV normal A
      No air flows EVAP VSV B
      Fig 14: Applying Battery Voltage To Terminals Of EVAP VSV
      G04054853Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Install the EVAP VSV.

    B : Go to step   31 

    A : Go to next step 

  17. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF EVAP VSV) 
    1. Disconnect the E15 EVAP VSV connector.
    2. Turn the engine switch on (IG).
    3. Measure the voltage between terminal 1 of the EVAP VSV connector and body ground.

      Result 

      RESULT REFERENCE

      Test Result Suspected Trouble Area Proceed to
      Between 11 V and 14 V Normal A
      Other than result above Wire harness or connectors between EVAP VSV and ECM B
      Fig 15: Identifying E15 EVAP VSV Connector
      G04054854Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reconnect the EVAP VSV connector.

    B : Go to step   32 

    A : GO TO NEXT STEP 

  18. CHECK HARNESS AND CONNECTOR (EVAP VSV - ECM) 
    1. Disconnect the E3 ECM connector and the E15 EVAP VSV connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      E3-11 (PRG) - E15-2 Below 1 Ω
      E3-11 (PRG) - Body ground 10 kΩ or higher
      E15-2 - Body ground 10 kΩ or higher
      Fig 16: Identifying E3 ECM Connector
      G04054855Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Reconnect the EVAP VSV connector.
    4. Reconnect the ECM connector.

    OK : Go to step   35 

    NG : Go to step   32 

  19. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (FOR VENT VALVE) 
    1. Turn the engine switch on (IG).
    2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VENT VALVE (ALONE).
    3. Measure the voltage between terminal VPMP of the ECM connector and body ground when the vent valve is turned ON (close) and OFF (vent) using the tester.

      Result 

      RESULT REFERENCE

      Test Result Suspected Trouble Area Proceed to
      Between 9 V and 14 V when OFF
      Below 3 V when ON      		 Vent valve A
      Below 3 V when OFF and ON ECM B
      Fig 17: Identifying ECM Connectors (1 Of 2)
      G04054856Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    A : Go to step   22 

    B : Go to step   35 

  20. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (FOR VENT VALVE) 
    1. Turn the engine switch on (IG).
    2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VENT VALVE (ALONE).
    3. Measure the voltage between terminal VPMP of the ECM connector and body ground when the vent valve is turned ON (close) and OFF (vent) using the tester.

      Result 

      RESULT REFERENCE

      Test Result Suspected Trouble Area Proceed to
      Between 3 V when OFF and ON Power source of vent valve A
      Between 9 V and 14 V when OFF
      Below 3 V when ON      		 Vent valve B
      Between 9 V and 14 V when OFF and ON ECM C
      Fig 18: Identifying ECM Connectors (2 Of 2)
      G04054857Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    B : Go to step   22 

    C : Go to step   35 

    A : GO TO NEXT STEP 

  21. INSPECT CANISTER ASSEMBLY (POWER SOURCE FOR VENT VALVE) 
    1. Turn the engine switch off.
    2. Disconnect the Q49 canister connector.
    3. Turn the engine switch on (IG).
    4. Measure the voltage between terminal 9 of the canister connector and body ground.

      Result 

      RESULT REFERENCE

      Test Result Suspected Trouble Area Proceed to
      Between 9 V and 14 V Normal A
      Between 0 V and 3 V Power source wire harness of vent valve B
      Fig 19: Identifying Q49 Canister Connector
      G04054858Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Reconnect the canister connector.

    B : Go to step   32 

    A : GO TO NEXT STEP 

  22. INSPECT CANISTER ASSEMBLY (VENT VALVE OPERATION) 
    1. Turn the engine switch off.
    2. Disconnect the Q49 canister connector.
    3. Apply the battery voltage to terminals 9 and 8 of the pump module.
    4. Touch the pump module to confirm the vent valve operation.

      Result 

      RESULT REFERENCE

      Test Result Suspected Trouble Area Proceed to
      Operating Wire harness between vent valve and ECM A
      Not operating Vent valve B
      Fig 20: Identifying Q49 Canister Connector
      G04054859Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Reconnect the canister connector.

    A : Go to step   32 

    B : Go to step   30 

  23. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (FOR PUMP MODULE (VACUUM CAP)) 
    1. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VACUUM PUMP (ALONE).
    2. Measure the voltage between MPMP terminal of ECM connector and body ground when the vacuum pump is turned ON and OFF using the tester.

      Result 

      RESULT REFERENCE

      Test Result Suspected Trouble Area Proceed to
      Between 0 V and 3 V when OFF
      Between 9 V and 14 V when ON      		 ECM normal A
      Between 9 V and 14 V when OFF
      Between 0 V and 3 V when ON      		 ECM B
      Fig 21: Identifying ECM Connectors
      G04054860Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    B : Go to step   35 

    A : GO TO NEXT STEP 

  24. CHECK HARNESS AND CONNECTOR (PUMP MODULE - ECM) 
    1. Turn the engine switch off.
    2. Disconnect the Q49 canister connector.
    3. Turn the engine switch on (IG).
    4. On the intelligent tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VACUUM PUMP (ALONE).
    5. Turn the vacuum pump ON.
    6. Measure the voltage between terminal 1 of the canister connector and body ground.

      Result 

      RESULT REFERENCE

      Test Result Suspected Trouble Area Proceed to
      Between 9 V and 14 V Normal A
      Between 0 V and 3 V Wire harness between ECM and vacuum pump B
      Fig 22: Identifying Q49 Canister Connector
      G04054861Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Reconnect the canister connector.

    B : Go to step   32 

    A : GO TO NEXT STEP 

  25. CHECK HARNESS AND CONNECTOR (PUMP MODULE - GROUND) 
    1. Disconnect the Q49 canister connector.
    2. Turn the engine switch off.
    3. Measure the resistance between terminal 6 of the canister connector and body ground.

      Result 

      RESULT REFERENCE

      Test Result Suspected Trouble Area Proceed to
      Below 1 Ω Vacuum Pump A
      10 kΩ or higher Wire harness between vacuum pump and body ground B
      Fig 23: Identifying Q49 Canister Connector Terminals
      G04054862Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reconnect the canister connector.

    A : Go to step   30 

    B : Go to step   32 

  26. INSPECT THROTTLE BODY (EVAP PURGE PORT) 
    1. Turn the engine switch off.
    2. Disconnect the EVAP hose from the intake manifold.
    3. Turn the engine switch on (IG).
    4. Use your finger to confirm that the port of the intake manifold has suction.

      Result 

      RESULT REFERENCE

      Test Result Suspected Trouble Area Proceed to
      Suction applied EVAP hose between intake manifold and EVAP VSV A
      No suction Intake manifold B
    5. Reconnect the EVAP hose.

    A : Go to step   33 

    B : Go to step   34 

  27. REINSTALL OR REPLACE FUEL TANK CAP 

    HINT:

    • When reinstalling the fuel tank cap, tighten it until a few click sounds are heard.
    • When replacing the fuel tank cap, use a fuel tank cap that meets OEM specifications, and install it until a few click sounds are heard.

    NEXT : Go to step   37 

  28. REPLACE FUEL TANK CAP 

    HINT:

    When installing the fuel tank cap, tighten it until a few click sounds are heard.

    NEXT : Go to step   37 

  29. REPAIR EVAP LEAK PART 
    1. Disconnect the pressure gauge to the canister with the adapter.
      Fig 24: Identifying Vent Hose
      G04054863Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the pressure gauge to the canister with the adapter.
      Fig 25: Connecting Pressure Gauge To Canister With Adapter
      G04054864Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using SST, pinch the rubber tube to close the canister passage to air.
    4. Pressurize the EVAP system to 3.2 to 3.7 kPa (24 to 28 mmHg).
    5. Apply soapy water to the piping and connecting parts of the EVAP system. Check for areas where bubbles appear. This indicates leaking points.
    6. Repair or replace leaking parts.

      HINT:

      • If the system has leaks, a whistling sound will be heard.
      • Disconnect the hose between the canister and the fuel tank from the canister. Close the canister hose connected to the fuel tank, and conduct an inspection. In this way, the fuel tank can be excluded as an area suspected of causing fuel leaks.

    NEXT : Go to step   37 

  30. REPLACE CANISTER ASSEMBLY 

    NEXT : Go to step   37 

  31. REPLACE DUTY VACUUM SWITCHING VALVE (EVAP VSV) 
    1. Disconnect the connector and hoses from the EVAP VSV.
    2. Remove the EVAP VSV.
    3. Install a new EVAP VSV.
    4. Reconnect the connector and hoses.
      Fig 26: Identifying EVAP VSV
      G04054865Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NEXT : Go to step   37 

  32. REPAIR OR REPLACE HARNESS OR CONNECTOR 

    NEXT : Go to step   37 

  33. REPLACE EVAP HOSE (THROTTLE BODY - EVAP VSV) 

    NEXT : Go to step   37 

  34. INSPECT THROTTLE BODY (EVAP PURGE PORT) 
    1. Remove the throttle body.
    2. Check that the EVAP purge port of the throttle body is not clogged. If necessary, replace the throttle body.

    NEXT : Go to step   37 

  35. REPLACE ECM 

    NEXT : Go to step   37 

  36. REPAIR OR REPLACE PARTS AND COMPONENTS INDICATED BY OUTPUT DTCS 
    1. Repair the malfunctioning areas indicated by the DTCs that had been confirmed when the vehicle was brought in.

    NEXT : Go to step 37 

  37. PERFORM EVAP SYSTEM CHECK (AUTO OPERATION) 

    HINT:

    • In the EVAP SYSTEM CHECK (AUTO OPERATION), the series of 5 EVAP SYSTEM CHECK step are performed automatically. IT takes a maximum of approximately 18 minutes.
    • Do not perform the EVAP SYSTEM CHECK when the fuel tank is more than 90% full because the cut-off valve may be closed, making the leak check of the fuel tank unavailable.
    • Do not run the engine in this step.
    • When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing an EVAP SYSTEM CHECK, keep the temperature below 35°C (95°F).
    1. Clear the DTCs (See DIAGNOSIS SYSTEM  ).
    2. On the intelligent tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.
    3. After the SYSTEM CHECK is completed, check for pending DTCs by entering the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.

      HINT:

      If no pending DTC is found, the repair has been successfully completed.

    NEXT : END 

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