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Home › Toyota › 2007 › 4Runner Limited, 4.0 U, RWD › Repair and Diagnosis › Engine Performance › Engine Control System (1GR-FE) › SFI System › EVAP System › Inspection Procedure

Inspection Procedure

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

HINT:

  1. CONFIRM DTC 
    1. Turn the ignition switch OFF and wait for 10 seconds.
    2. Turn the ignition switch on.
    3. Turn the ignition switch off and wait for 10 seconds.
    4. Connect the intelligent tester to the DLC3.
    5. Turn the ignition switch on and turn the tester on.
    6. Select 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.

      Fig 1: EVAP System DTC Chart
      G04968565Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
      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.
  2. PERFORM EVAP SYSTEM CHECK (AUTO OPERATION) 
    NOTE:
    • In the EVAP SYSTEM CHECK (AUTO OPERATION), the series of 5 EVAP SYSTEM CHECK steps is performed automatically by the intelligent tester. It takes a maximum of approximately 15 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 and 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. Connect the intelligent tester to the DLC3.
    2. Clear DTCs (See DTC CHECK/CLEAR  ).
    3. Select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.
    4. After the EVAP SYSTEM CHECK is completed, check for pending DTCs by selecting the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.

      HINT:

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

  3. PERFORM EVAP SYSTEM CHECK (MANUAL OPERATION) 
    Fig 2: EVAP System Check (Manual Operation)
    G04968566Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    NOTE:
    • In the EVAP SYSTEM CHECK (MANUAL OPERATION), the series of 5 EVAP SYSTEM CHECK steps is performed manually by the intelligent tester.
    • Do not perform the EVAP SYSTEM CHECK when the fuel tank is more than 90% full because the cut-off valve may be closed and 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. Connect the intelligent tester to the DLC3.
    2. Clear DTCs (See DTC CHECK/CLEAR  ).
    3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK/ MANUAL OPERATION.
  4. PERFORM EVAP SYSTEM CHECK (STEP 1/5) 
    Fig 3: EVAP System Check (Step 1/5)
    G04968567Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    1. Check the EVAP pressure in step 1/5.

      Result 

      RESULT CHART

      DTCs(1) Test Results Suspected Trouble Areas 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 noising B
      (1) The DTCs relating to the EVAP system 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 Check (Step 1/5 To 2/5)
    G04968568Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    1. Check the EVAP pressure in step 1/5 and 2/5.

      Result 

      RESULT CHART

      DTCs(1) Test Results Suspected Trouble Areas Proceed to
      - Virtually no variation In EVAP pressure during step 1/5. Then decreases to 0.02 Inch leak pressure standard(1) 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 relating 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 Check (Step 2/5)
    G04968569Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    HINT:

    Make a note of the pressures checked steps (a) and (b) below.

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

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

      Result 

      RESULT CHART

      DTCs(1) Test Results Suspected Trouble Areas Proceed to
      - EVAP pressure in step (b) is 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) Is -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) is below -4.85 kPa (-36.38 mmHg) 0.02 inch orifice clogged C
      P2419 EVAP pressure in step (a) is more than -1.06 kPa (-7.95 mmHg) Vent valve stuck closed D
      (1) The DTCs related to the EVAP system 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 Check (Step 2/5 To 3/5)
    G04968570Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    1. Check the EVAP pressure increase in step 3/5.

      Result 

      RESULT CHART

      DTCs(1) Test Results Suspected Trouble Areas 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 C
      (1) The DTCs relating to the EVAP system 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 Check (Step 3/5)
    G04968571Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    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.

  9. PERFORM EVAP SYSTEM CHECK (STEP 4/5) 
    Fig 8: EVAP System Check (Step 4/5)
    G04968572Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    1. Check the EVAP pressure in step 4/5.

      Result 

      RESULT CHART

      DTCs(1) Test Results Suspected Trouble Areas 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 415 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 pure 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 Purge VSV stuck closed C
      (1) The DTCs relating to the EVAP system displayed on an 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 Check (Step 5/5)
    G04968573Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    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 CHART

      DTCs(1) Test Results Suspected Trouble Areas Proceed to
      - EVAP pressure (step 3/5) lower than second 0.02 inch leak pressure standard (step 5/5) Not yet determined (no leafage from EVAP system) A
      P0441 and P0455 EVAP pressure (step 3/5) higher than [second 0.02 inch leak pressure standard (step 5/5) x 0.2]
      • Purge 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 relating 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 Check (Step 3/5)
    G04968574Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    1. Check the EVAP pressure in step 3/5.

      Result 

      RESULT CHART

      DTCs(1) Test Results Suspected Trouble Areas Proceed to
      P043F EVAP pressure is less than [0.02 Inch leak pressure standard] measured In step 2/5 0.02 Inch orifice high-flow A
      P2401 EVAP pressure Is almost the same as [0.02 Inch leak pressure standard] measure In step 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 (PURGE VSV) 
    1. Select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / EVAP VSV (ALONE).
    2. Disconnect the hose (connected to the canister) from the purge VSV.
      Fig 11: Disconnecting Hose (Connected To Canister) From Purge VSV
      G04968575Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    3. Start the engine.
    4. On the tester, turn off the purge VSV (EVAP VSV: OFF).
    5. Use your finger to confirm that the purge VSV has no suction.
    6. Using the tester, turn on the purge VSV (EVAP VSV: ON).
    7. Use you finger to confirm that the purge VSV has suction.

      Result 

      RESULT CHART

      Test Results Suspected Trouble Areas Proceed to
      No suction when purge VSV turned OFF, and suction applied when turned ON Purge VSV normal A
      Suction applied when purge VSV turned OFF Purge VSV stuck open B
      No suction when purge VSV turned ON
      • Purge VSV stuck closed
      • Problems with EVAP hose between purge VSV and throttle body
      		 C
    8. Reconnect the hose.

    B:  Go to step   14

    C: Go to step   15

    A: GO TO NEXT STEP 

  13. CHECK FUEL TANK CAP ASSEMBLY 
    1. Check that the fuel tank cap is correctly installed and confirm the fuel tank cap meets OEM specification.

      HINT:

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

      1. Tighten the fuel tank cap.
      2. Remove the fuel tank cap and install it onto a fuel tank cap adaptor.
      3. 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.
      4. Seal the adaptor and wait for 2 minutes.
      5. Check the pressure. If the pressure is 2 kPa (15 mmHg) or more, the fuel tank cap is normal.

        Result 

        RESULT CHART

        Test Results Suspected Trouble Areas 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 NO. 1 VACUUM SWITCHING VALVE 
    1. Turn the ignition switch off.
    2. Disconnect the B19 purge VSV connector.
    3. Disconnect the hose (connected to the canister) from the purge VSV.
      Fig 12: Disconnecting Hose (Connected To Canister) From Purge VSV
      G04968576Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    4. Start the engine.
    5. Use your finger to confirm that the purge VSV has no suction.

      Result 

      RESULT CHART

      Test Results Suspected Trouble Areas Proceed to
      No suction ECM A
      Suction applied Purge VSV B
    6. Reconnect the purge VSV connector.
    7. Reconnect the hose.

    A: Go to step   35

    B: Go to step   31

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

      Result 

      RESULT CHART

      Test Results Suspected Trouble Areas Proceed to
      Suction applied EVAP hose between purge
      VSV and throttle body normal      		 A
      No suction
      • Throttle body
      • EVAP hose between purge VSV and throttle body
      		 B
    4. Reconnect the hose.
      Fig 13: Disconnecting Hose (Connected To Throttle Body) From Purge VSV
      G04968577Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    B:  Go to step  26

    A: GO TO NEXT STEP 

  16. INSPECT NO. 1 VACUUM SWITCHING VALVE (PURGE VSV) 
    1. Remove the purge VSV.
    2. Apply battery voltage to the terminals of the purge VSV.
      Fig 14: Applying Battery Voltage To Terminals Of Purge VSV
      G04968578Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    3. Using compressed air, confirm that air flows from port A to port B.

      Result 

      RESULT CHART

      Test Results Suspected Trouble Area Proceed to
      Air flowed Purge VSV normal A
      No air flow Purge VSV B
    4. Install the purge VSV.

    B:  Go to step   31

    A: GO TO NEXT STEP 

  17. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF PURGE VSV) 
    1. Disconnect the V2 purge VSV connector.
      Fig 15: Identifying V2 Purge VSV Connector
      G04968579Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Turn the ignition switch on.
    3. Measure the voltage between terminal 1 of the purge VSV connector and the body ground.

      Result 

      RESULT CHART

      Test Results Suspected Trouble Areas Proceed to
      Between 11 V and 14 V Normal A
      Other than result above Wire harness or connectors between purge VSV and ECM B
    4. Reconnect the purge VSV connector.

    B: Go to step   32

    A: GO TO NEXT STEP 

  18. CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM) 
    1. Disconnect the E4 EGM connector and the V2 purge VSV connector.
      Fig 16: Identifying E4 EGM Connector And V2 Purge VSV Connector
      G04968580Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the resistance between the terminals of the purge VSV connector and ECM connector.

      Standard resistance 

      TESTER CONNECTIONS SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      E4-34(PRG)-V2-2 Below 1 Ω
      E4-34 (PRG) - Body ground 10 kΩ or higher
      V2-1 - Body ground 10 kΩ or higher
    3. Reconnect the purge 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 ignition switch on.
    2. Select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VENT VALVE (ALONE).
    3. Measure the voltage between terminal VPMP of the ECM connector and the body ground when the vent valve is turned ON (close) and OFF (vent) using the tester.
      Fig 17: Identifying ECM Connector Terminal VPMP
      G04968581Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Result 

      RESULT CHART

      Test Results Suspected Trouble Areas 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

    A: Go to step   22

    B: Go to step   35

  20. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (FOR VENT VALVE) 
    1. Turn the ignition switch on (IG).
    2. Select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VENT VALVE (ALONE).
    3. Measure the voltage between terminal VPMP of the ECM connector and the body ground when the vent valve is turned ON (close) and OFF (vent) using the tester.
      Fig 18: Identifying ECM Connector Terminal VPMP
      G04968582Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Result 

      RESULT CHART

      Test Results Suspected Trouble Areas 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

    B: Go to step   22

    C: Go to step   35

    A: GO TO NEXT STEP 

  21. INSPECT PUMP MODULE (POWER SOURCE FOR VENT VALVE) 
    1. Turn the ignition switch off.
    2. Disconnect the L4 canister connector.
      Fig 19: Identifying L4 Canister Connector
      G04968583Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    3. Turn the ignition switch on.
    4. Measure the voltage between terminal 9 of the canister connector and the body ground.

      Result 

      RESULT CHART

      Test Results Suspected Trouble Areas Proceed to
      Between 9 V and 14 V Normal A
      Between 0 V and 3 V Power source wire harness of vent valve B
    5. Reconnect the canister connector.

    B: Go to step   32

    A: GO TO NEXT STEP 

  22. INSPECT PUMP MODULE (VENT VALVE OPERATION) 
    1. Turn the ignition switch to off.
    2. Disconnect the L4 canister connector.
      Fig 20: Identifying L4 Canister Connector
      G04968584Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    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 CHART

      Test Results Suspected Trouble Areas Proceed to
      Operating Wire harness between vent valve and ECM A
      Not operating Vent valve B
    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 PUMP)) 
    1. Select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VACUUM PUMP (ALONE).
    2. Measure the voltage between terminal MPMP of the ECM connector and the body ground when the vacuum pump is turned ON and OFF using the tester.
      Fig 21: Identifying ECM Connector Terminal MPMP
      G04968585Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Result 

      RESULT CHART

      Test Results Suspected Trouble Areas 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

    B: Go to step   35

    A: GO TO NEXT STEP 

  24. CHECK HARNESS AND CONNECTOR (PUMP MODULE - ECM) 
    1. Turn the ignition switch off.
    2. Disconnect the L4 canister connector.
      Fig 22: Locating L4 Canister Connector
      G04968586Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    3. Turn the ignition switch on.
    4. Select the following menu items on the tester: 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 the body ground.

      Result 

      RESULT CHART

      Test Results Suspected Trouble Areas Proceed to
      Between 9 V and 14 V Normal A
      Between 0 V and 3 V Wire harness between ECM and vacuum pump B
    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 L4 canister connector.
      Fig 23: Identifying L4 Canister Connector
      G04968587Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Turn the ignition switch to off.
    3. Check the resistance between terminal 6 of the canister connector and the body ground.

      Result 

      RESULT CHART

      Test Results Suspected Trouble Areas Proceed to
      Below 1 Ω Vacuum Pump A
      10 kΩ or higher Wire harness between vacuum pump and body ground B
    4. Reconnect the canister connector.

    A: Go to step   30

    B: Go to step   32

  26. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY 
    1. Stop the engine.
    2. Disconnect the EVAP hose from the throttle body.
    3. Start the engine.
    4. Use your finger to confirm that the port of the throttle body has suction.

      Result 

      RESULT CHART

      Test Results Suspected Trouble Areas Proceed to
      Suction applied EVAP hose between throttle body and purge VSV A
      No suction Throttle body B
    5. Reconnect the EVAP hose.

    A: Go to step   33

    B: Go to step   34

  27. CORRECTLY 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 ASSEMBLY 

    HINT:

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

    NEXT: Go to step   37

  29. LOCATE EVAP LEAK 
    1. Disconnect the vent hose.
      Fig 24: Identifying Vent Hose
      G04968588Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Connect the EVAP pressure tester tool to the canister with the adapter.
      Fig 25: Identifying EVAP Pressure Tester Tool And Adapter
      G04968589Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    3. Pressurize the EVAP system by 3.2 to 3.7 kPa (24 to 28 mmHg).
    4. Apply soapy water to the piping and the connecting parts of the EVAP system.
    5. Look for areas where bubbles appear. This indicates leak point.
    6. Repair or replace the leak point.

    NEXT: Go to step  37

  30. REPLACE CHARCOAL CANISTER ASSEMBLY 

    NEXT: Go to step   37

  31. REPLACE NO. 1 VACUUM SWITCHING VALVE (PURGE VSV) 
    1. Disconnect the connector and 2 hoses from the purge VSV.
      Fig 26: Identifying Purge VSV
      G04968590Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Remove the purge VSV.
    3. Install a new purge VSV.
    4. Reconnect the connector and 2 hoses.

    NEXT: Go to step   37

  32. REPAIR OR REPLACE HARNESS OR CONNECTOR 

    NEXT: Go to step   37

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

    NEXT: Go to step   37

  34. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY 
    1. Remove the throttle body (See ON-VEHICLE INSPECTION  ).
    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 
    1. Replace the ECM (See REMOVAL  ).

    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.
  37. PERFORM EVAP SYSTEM CHECK (AUTO OPERATION) 
    NOTE:
    • In the EVAP SYSTEM CHECK (AUTO OPERATION), the series of 5 EVAP SYSTEM CHECK steps are performed automatically by the intelligent tester. It takes a maximum of approximately 15 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 and 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 DTC CHECK/CLEAR  ).
    2. On the intelligent tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.
    3. After the SYSTEM CHECK is completed, check for pending DTCs by selecting the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.

      HINT:

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

    NEXT: COMPLETED 

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