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Home >> Toyota >> 2005 >> Highlander Limited, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control System (SFI) (3MZ-FE) - Diagnostics >> EVAP Inspection Procedure >> Inspection Procedure

Inspection Procedure

HINT:

Read freeze frame data. Freeze frame data records engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0441, P0442, P0446 AND/OR P0456) 

    Result 

    DTC OUTPUT RESULT

    Display (DTC output) Proceed to
    Only P0441, P0442, P0446 and/or P0456 are output A
    P0451, P0452 and P453 are output B

    HINT:

    If any other DTCs besides P0441, P0442, P0446 and/or P0456 are output, perform the troubleshooting for those DTCs first (reference: P0451, P0452, P0453 are vapor pressure sensor malfunctions).

    1. B: Go to RELEVANT  DIAGNOSTIC TROUBLE CODE CHART  
    2. A: Go to next step 
  2. CHECK CURRENT AND PENDING DTC 
    1. Check current DTCs. Select the hand-held tester menus: DIAGNOSIS, ENHANCED OBDII, DTC INFO and CURRENT DTCS.
    2. Check pending DTCs. Select the hand-held tester menus: DIAGNOSIS, ENHANCED OBDII, DTC INFO and PENDING DTCS.

      Result 

      DTC OUTPUT RESULT

      Current DTC Pending DTC Conclusion
      Set Set System has been malfunctioning. Problem can be specified.
      Set - System was malfunctioning in previous driving cycle. Problem may be specified.
      - Set System is malfunctioning. This is Intermittent problem and caused by fuel tank cap loosening. Otherwise, this problem may be difficult to eliminate.

    HINT:

    The ECM stores the current DTC and illuminates the MIL when an emission-related component is malfunctioning in 2 consecutive driving cycles (2 trips). The MIL Is turned OFF, if the component is functioning normally in 3 consecutive driving cycles. The ECM erases the current DTC, if the component is functioning normally in 40 consecutive driving cycles.

    The ECM stores the pending DTC when If the component is malfunctioning in present driving cycle (1 trip). The ECM erases the pending DTC, if the component is functioning normally in the next driving cycle.

    NEXT: Go to next step 

  3. PREDICT POSSIBLE MALFUNCTION AREA 

    Predict possible malfunction area using the matrix below.

    EVAP DTC Matrix 

    Fig 1: EVAP DTC Matrix Chart
    G02611150Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    DTCS REFERENCE

    DTCs Suspected Malfunction Area
    P0441 only EVAP VSV stuck open
    P0446 only CCV (vent valve) stuck open
    P0442 and/or P0456 Small leak

    NEXT: Go to next step 

  4. PERFORM EVAP SYSTEM CHECK 
    NOTE: The EVAP system check can be used for confirmation after the EVAP system repair. Check DTCs after performing the EVAP system check. If no pending DTC Is set, the EVAP system is functioning normally and the repair is complete.
    1. Select the "mmHg" unit. Select the hand-held tester menus: DIAGNOSIS, SETUP, UNIT CONVERSION and VAPOR PRESS.
    2. Allow the engine to idle.
    3. Perform the EVAP system check to find a malfunction area. Select the hand-held tester menus: DIAGNOSIS, ENHANCED OBD II, SYSTEM CHECK and LEV II SYS CHECK.
    4. Read NOTICE and press ENTER.

      HINT:

      The EVAP system check is most accurate when the following conditions are being set:

      • Atmospheric pressure is 762 mmHg (sea level).
      • The engine coolant and intake air temperatures are 4 to 35°C (40 to 90°F).
      • The fuel tank level is 1/4 to 3/4.

    Diagram of LEVII EVAP System Check 

    Fig 2: Diagram Of LEVII EVAP System Check
    G02611151Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NEXT: Go to next step 

  5. EVAP SYSTEM CHECK STEP 1 (INITIALIZE SYSTEM) 
    Fig 3: Checking EVAP System Step 1 (Initialize System)
    G02611152Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Wait for 30 seconds.

    Fig 4: Display LEVII System Check Mode
    G02611153Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NEXT: Go to next step 

  6. EVAP SYSTEM CHECK STEP 2 (CHECK FOR CCV) 
    Fig 5: Checking EVAP System Step 2 (For CCV)
    G02611154Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Press RIGHT to go to step 2.
    2. Wait for 30 seconds and check VAPOR PRESS (EVAP pressure).
      Fig 6: Display LEVII System Check Mode
      G02611155Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      Fig 7: Vapor Press Conclusion Chart
      G02611156Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      In this step, the intake manifold pressure (vacuum) is applied to the EVAP system. However, the fuel tank pressure does not drop due to the CCV (vent valve) open.

    1. NG: Go to step   11 
    2. OK: Go to next step 
  7. EVAP SYSTEM CHECK STEP 3 (INITIALIZE SYSTEM) 
    Fig 8: Checking EVAP System Step 3 (Initialize System)
    G02611157Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Press RIGHT to go to step 3.
    2. Wait for 30 seconds.
      Fig 9: Display LEVII System Check Mode
      G02611158Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NEXT: Go to next step 

  8. EVAP SYSTEM CHECK STEP 4 (CHECK FOR EVAP VSV STUCK OPEN) 
    Fig 10: Checking EVAP System Step 4 (For EVAP VSV Stuck Open)
    G02611159Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Press RIGHT to go to step 4.
    2. Wait for 15 seconds and check VAPOR PRESS (EVAP pressure).
    Fig 11: Display LEVII System Check Mode
    G02611160Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    VAPOR PRESS RESULT

    VAPOR PRESS Conclusion Proceed to
    Higher than 758 mmHg-a (-4 mmHg-g) Trouble area has not been found yet. OK
    Lower than 758 mmHg-a (-4 mmHg-g) EVAP VSV stuck open NG
    1. NG: Go to step   14 
    2. OK: Go to next step 
  9. EVAP SYSTEM CHECK STEP 5 (APPLYING VACUUM) 
    Fig 12: Checking EVAP System Step 5 (Applying Vacuum)
    G02611161Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Press RIGHT to go to step 5.
    2. Wait for 30 seconds and check VAPOR PRESS (EVAP pressure).
    Fig 13: Display LEVII System Check Mode
    G02611162Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    Fig 14: Vapor Press Conclusion
    G02611163Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:
    • If the pressure is lower than 740 mmHg-a (-22 mmHg-g), the hand-held tester closes the EVAP VSV.
      Fig 15: Display LEVII System Check Mode
      G02611164Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • If the pressure Is lower than 735 mmHg-a (-27 mmHg-g), the hand-held tester cancels the EVAP system check.
      Fig 16: Display Error
      G02611165Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. B: Go to Step   15 
    2. C: Go to step   18 
    3. A: Go to next step 
  10. EVAP SYSTEM CHECK STEP 6 (LEAK CHECK FOR EVAP SYSTEM) 
    Fig 17: Checking EVAP System Step 6 (Leak Check For EVAP System)
    G02611166Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Press RIGHT to go to step 6 when the VAPOR PRESS (EVAP pressure) is lower than 742 mmHg-a (-20 mmHg-g).
    2. Wait for 300 seconds and check VAPOR PRESS (EVAP pressure).
    Fig 18: Display LEVII System Check Mode
    G02611167Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    VAPOR PRESS RESULT

    VAPOR PRESS Conclusion Proceed to
    Less than 758 mmHg-a (-4 mmHg-g) EVAP system is functioning normally. OK
    Higher than 758 mmHg-a (-4 mmHg-g) Leakage NG
    1. NG: Go to step   18 
    2. OK: Go to next step 

    Go to step   40 

  11. CHECK CCV 
    1. Turn the ignition switch OFF.
    2. Turn the ignition switch ON.
    3. Switch the CCV (vent valve) using the hand-held tester. Select the hand-held tester menus: DIAGNOSIS, ENHANCED OBD II, ACTIVE TEST and CAN CTRL VSV.
    4. Touch the CCV and check the operation during switching the CCV.
    Fig 19: Checking CCV
    G02611168Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    CCV OPERATION

    CCV (Vent Valve) Conclusion Proceed to
    CCV is operated CCV is functioning normally. OK
    CCV is not operated CCV is malfunctioning. NG
    1. NG: Go to step   25 
    2. OK: Go to next step 
  12. CHECK AIR INLET LINE RESTRICTION 
    1. Disconnect the air inlet line from the CCV.
    2. Remove and reinstall the fuel tank cap to release the fuel tank pressure.
    3. Allow the engine to idle.
      Fig 20: Disconnecting Air Inlet Line From The CCV
      G02611169Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Perform step 2 of the EVAP system check.
    5. Wait for 30 seconds and check VAPOR PRESS (EVAP pressure).
      Fig 21: Display LEVII System Check Mode
      G02611170Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      VAPOR PRESS RESULT

      VAPOR PRESS Conclusion Proceed to
      Higher than 752 mmHg-a (-10 mmHg-g) Blockage in canister filter A
      Lower than 752 mmHg-a (-10 mmHg-g) Blockage in CCV (vent valve) or canister B
    6. Reconnect the air inlet line to the CCV.
    1. B: Go to step 13 
    2. A: REPLACE CANISTER FILTER 
  13. CHECK CANISTER BLOCKAGE 
    1. Turn the ignition switch OFF.
    2. Remove the CCV from the canister.
    3. Remove and reinstall the fuel tank cap to release the fuel tank pressure.
    4. Allow the engine to idle.
      Fig 22: Removing CCV From Canister
      G02611171Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Perform step 2 of the EVAP system check.
    6. Wait for 30 seconds and check VAPOR PRESS (EVAP pressure).
    Fig 23: Display LEVII System Check Mode
    G02611172Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    VAPOR PRESS RESULT

    VAPOR PRESS Conclusion Proceed to
    Higher than 752 mmHg-a (-10 mmHg-g) CCV (vent valve) stuck closed A
    Lower than 752 mmHg-a (-10 mmHg-g) Blockage In canister B
    1. B: CHECK AND REPLACE CHARCOAL CANISTER (See  CHARCOAL CANISTER ASSY (3MZ-FE)  ) 
    2. A: REPLACE CCV (VENT VALVE) 
  14. CHECK EVAP VSV (FOR EVAP VSV STUCK OPEN) 
    1. Turn the ignition switch OFF.
    2. Disconnect the purge hose of the canister from the EVAP VSV.
    3. Disconnect the EVAP VSV connector.
    4. Allow the engine to idle.
    5. Touch the EVAP VSV port to check the vacuum.
    Fig 24: Checking EVAP VSV (For EVAP VSV Stuck Open)
    G02611173Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    VACUUM CHECKING RESULT

    EVAP VSV Conclusion Proceed to
    Vacuum is applied. EVAP VSV is malfunctioning. A
    No vacuum is applied. Electrical circuit of EVAP VSV is malfunctioning. B
    1. B: Go to step   29 
    2. A: REPLACE EVAP VSV 
  15. CHECK FUEL TANK CAP 
    1. Remove the fuel tank cap and reinstall it until a few click sound is heard.
    2. Clear the DTCs.
    3. Check pending DTCs after the EVAP system check If no pending DTC is set, the DTC(s) was set due to the fuel cap loosening.

    If necessary, replace the fuel cap.

    1. NG: Go to Step 16 
    2. OK: REPAIR IS COMPLETE 
  16. CHECK EVAP VSV (FOR EVAP VSV STUCK CLOSED) 
    1. Disconnect the purge hose of the canister from the EVAP VSV.
    2. Allow the engine to idle.
    3. Switch the EVAP VSV using the hand-held tester. Select the hand-held tester menus: DIAGNOSIS, ENHANCED OBD II, ACTIVE TEST and EVAP VSV.
    4. Touch the EVAP VSV port to check the vacuum.
    Fig 25: Checking EVAP VSV (For EVAP VSV Stuck Closed
    G02611174Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The EVAP VSV can be tested with the EVAP Test Equipment (go to step  39).

    Result 

    EVAP VSV TEST RESULT

    EVAP VSV Conclusion Proceed to
    Vacuum is applied when EVAP VSV is ON. No vacuum is applied when EVAP VSV is OFF. EVAP VSV is functioning normally. OK
    No vacuum is applied when EVAP VSV is ON. Electrical circuit of EVAP VSV is malfunctioning. NG
    1. NG: Go to step   31 
    2. OK: Go to next step 
  17. CHECK CCV (FOR CCV STUCK OPEN) 
    1. Turn the ignition switch OFF.
    2. Remove the CCV (vent valve) and plug the canister.
    3. Allow the engine to idle.
      Fig 26: Plugging Canister
      G02611175Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Apply vacuum to the EVAP system with the EVAP system check. Perform step 5 "Applying Vacuum".
    5. Wait for 30 seconds and check the VAPOR PRESS (EVAP pressure).
    Fig 27: Display LEVII System Check Mode
    G02611176Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    VAPOR PRESS CHECKING RESULT

    VAPOR PRESS Conclusion Proceed to
    Lower than 747 mmHg-a (-15 mmHg-g) CCV (vent valve) stuck open A
    Higher than 747 mmHg-a (-15 mmHg-g) Blockage in canister Blockage in purge line (Fuel tank - Canister) Blockage in purge line (Fuel tank - EVAP VSV) B
    1. B: Go to step   20 
    2. A: Go to next step 

    Go to step   24 

  18. CHECK FUEL TANK CAP 
    1. Remove the fuel tank cap and reinstall it until a few click sound is heard.
    2. Clear the DTCs.
    3. Check pending DTCs after the EVAP system check If no pending DTC is set, the DTC(s) was set due to the fuel cap loosening.

    If necessary, replace the fuel cap.

    1. NG: Go to step 19 
    2. OK: REPAIR IS COMPLETE 
  19. CHECK FILLER NECK DAMAGE 
    1. Remove the fuel tank cap.
    2. Visually inspect the filler neck for damage.
    3. Reinstall the fuel tank cap.
    Fig 28: Checking Filler Neck Damage
    G02611177Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    A leak point may be found with the EVAP Test Equipment (go to step  36).

    1. NG: REPLACE FUEL TANK INLET PIPE 
    2. OK: Go to next step 
  20. CHECK PURGE LINE (CANISTER - FUEL TANK) 
    1. Check that the pipes and hoses are connected correctly.
    2. Check that the pipes and hoses are not loose or disconnected.
    3. Check the pipes and hoses have no damage or blockage.
      Fig 29: Checking Purge Line (Canister - Fuel Tank)
      G02611178Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE PURGE HOSE 
    2. OK: Go to next step 
  21. CHECK PURGE LINE (CANISTER - EVAP VSV) 
    1. Check that the pipes and hoses are connected correctly.
    2. Check that the pipes and hoses are not loose or disconnected.
    3. Check the pipes and hoses have no damage or blockage.
    1. NG: REPLACE PURGE HOSE 
    2. OK: Go to next step 
  22. INSPECT CANISTER (See  INSPECTION  ) 
    1. NG: REPLACE CANISTER 
    2. OK: Go to next step 
  23. INSPECT FUEL TANK 
    1. Check that the fuel tank has no damage.
    2. Check the fuel inlet pipe has no damage.
    3. Check leakage from the fuel pump unit.
    1. NG: REPAIR OR REPLACE DEFECTIVE OR DAMAGED PARTS 
    2. OK: Go to next step 

    Go to step   40 

  24. CHECK CCV 
    1. Stop the engine and turn the ignition switch ON.
    2. Switch the CCV (vent valve) using the hand-held tester. Select the hand-held tester menus: DIAGNOSIS, ENHANCED OBD II, ACTIVE TEST and CAN CTRL VSV.
    3. Touch the CCV and check the operation during switching the CCV.
    Fig 30: Checking CCV
    G02611179Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    CCV OPERATION RESULT

    CCV (Vent Valve) Conclusion Proceed to
    CCV is operated Electrical circuit of CCV is functioning normally. A
    CCV is not operated Electrical circuit of CCV is malfunctioning. B
    1. B: Go to step   27 
    2. A: Go to next step 
  25. CHECK CCV 
    1. Turn the ignition switch OFF.
    2. Remove the CCV (vent valve).
    3. Connect the CCV connector.
    4. Turn the ignition switch ON.
    5. Switch the CCV using the hand-held tester. Select the hand-held tester menus: DIAGNOSIS, ENHANCED OBD II, ACTIVE TEST and CAN CTRL VSV.
    6. Apply air to the CCV port using an air gun and check the airflow.
    Fig 31: Checking Airflow
    G02611180Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    AIRFLOW RESULT

    CCV (Vent Valve) Conclusion Proceed to
    Air flows when CCV is OFF (open). Air does not flows when CCV is ON (close). CCV is functioning normally. Electrical circuit of CCV is malfunctioning. A
    Air flows when CCV is ON (close). Air does not flows when CCV is OFF (open). CCV is malfunctioning. B
    1. B: REPLACE CCV (See  CHARCOAL CANISTER ASSY (3MZ-FE)  ) 
    2. A: Go to next step 
  26. CHECK WIRE HARNESS AND CONNECTOR (CCV - POWER SOURCE) 
    1. Turn the ignition switch OFF.
    2. Disconnect the CCV connector.
    3. Turn the ignition switch ON.
    4. Measure the voltage between terminal 2 of the wire harness side connector and body ground.
    Fig 32: Measuring Voltage Between Terminal 2 Of Wire Harness Side Connector And Body Ground
    G02611181Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    VOLTAGE CHECKING RESULT

    Voltage Conclusion Proceed to
    Battery voltage Wire harness (CCV - Power source) is OK. OK
    0 to 3 V Wire harness (CCV - Power source) is short circuit. NG
    1. NG: REPAIR OR REPLACE WIRE HARNESS 
    2. OK: Go to next step 
  27. CHECK WIRE HARNESS AND CONNECTOR (CCV - ECM) 
    1. Switch the CCV using the hand-held tester. Select the hand-held tester menus: DIAGNOSIS, ENHANCED OBD II, ACTIVE TEST and CAN CTRL VSV.
    2. Measure the resistance between terminal 1 of the wire harness side connector and body ground.
    Fig 33: Measuring Resistance Between Terminal 1 Of Wire Harness Side Connector And Body Ground
    G02611182Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    RESISTANCE CHECKING RESULT

    Resistance Conclusion Proceed to
    More than 10 kΩ when CCV is OFF. Less than 10 Q when CCV is ON. ECM and wire harness (CCV - ECM) are OK. CCV is malfunctioning. OK
    No change Either of wire harness (CCV - ECM) or ECM is malfunctioning. NG
    1. NG: Go to step 28 
    2. OK: REPLACE CCV 
  28. CHECK WIRE HARNESS AND CONNECTOR (CCV - ECM) 
    1. Check the wire harness between the ECM and CCV.
    2. Turn the ignition switch OFF.
    3. Disconnect the E7 ECM connector.
    4. Measure the resistance between the CCV and ECM wire harness side connectors.
    Fig 34: Identifying CCV And ECM Wire Harness Side Connectors
    G02611183Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard 

    CCV AND ECM WIRE HARNESS SIDE CONNECTORS RESISTANCE SPECIFICATIONS

    Tester Connection Specified Condition
    1 (CCV) - E7-27 (ECM) Less than 10 Ω
    1 (CCV) - Body ground More than 10 kΩ
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: CHECK AND REPLACE ECM 
  29. CHECK EVAP VSV 
    1. Turn the ignition switch ON.
    2. Switch the EVAP VSV using the hand-held tester. Select the hand-held tester menus: DIAGNOSIS, ENHANCED OBD II, ACTIVE TEST and EVAP VSV (Alone).
    3. Listen to click sounds to check the EVAP VSV operation.
    Fig 35: Checking EVAP VSV Operation
    G02611184Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    EVAP VSV OPERATION CHECKING RESULT

    EVAP VSV Conclusion Proceed to
    Operated Electrical circuit of EVAP VSV is functioning normally. OK
    Not operated Electrical circuit of EVAP VSV is malfunctioning. NG
    1. NG: Go to step   32 
    2. OK: Go to next step 
  30. CHECK EVAP VSV 
    1. Disconnect the purge hose of the canister from the EVAP VSV.
    2. Start the engine.
    3. Switch the EVAP VSV using the hand-held tester. Select the hand-held tester menus: DIAGNOSIS, ENHANCED OBD II, ACTIVE TEST and EVAP VSV.
    4. Touch the EVAP VSV port to check the vacuum.

    HINT:

    The EVAP VSV can be tested with the EVAP Test Equipment (go to step  39).

    Fig 36: Checking Vacuum
    G02611185Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    Fig 37: Vacuum Checking Result
    G02611186Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   32 
    2. OK: Go to next step 
  31. CHECK PURGE LINE (EVAP VSV - THROTTLE BODY) 
    1. Check that the vacuum hoses are connected correctly.
    2. Check that the vacuum hoses are not loose or disconnected.
    3. Check the vacuum hoses and tubes for cracks, holes, damage, or blockage.
      Fig 38: Checking Purge Line (EVAP VSV - Throttle Body)
      G02611187Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE PURGE HOSE 
    2. OK: REPLACE EVAP VSV 
  32. INSPECT EVAP VSV 
    1. Turn the ignition switch OFF.
    2. Disconnect the EVAP VSV connector.
    3. Measure the resistance of the EVAP VSV.
    Fig 39: Measuring Resistance Of EVAP VSV
    G02611188Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard 

    EVAP VSV RESISTANCE SPECIFICATIONS

    Tester Connection Specified Condition
    Between terminals 26 to 30 Ω at 20°C (68°)F)
    Each terminal - Body ground 10 kΩ or more
    1. NG: REPLACE EVAP VSV 
    2. OK: Go to next step 
  33. INSPECT EVAP VSV 
    1. Remove the EVAP VSV.
    2. Apply air to the EVAP VSV using an air gun, check the airflow.
      Fig 40: Checking Airflow
      G02611189Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Apply battery positive voltage across the terminals.
    4. Apply air to the EVAP VSV using an air gun, check the airflow.
    Fig 41: Checking Airflow
    G02611190Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    AIRFLOW CHECKING RESULT

    EVAP VSV Conclusion Proceed to
    Air does not flow when EVAP VSV is OFF. Air flows when EVAP VSV is ON. EVAP VSV is functioning normally. OK
    Air flows when EVAP VSV is OFF. Air does not flow when EVAP VSV is ON. EVAP VSV Is malfunctioning. NG
    1. NG: REPLACE EVAP VSV 
    2. OK: Go to next step 
  34. CHECK WIRE HARNESS AND CONNECTOR (EVAP VSV - POWER SOURCE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage between the terminal 1 of the wire harness side and body ground.
    Fig 42: Identifying EVAP VSV Connector Terminals
    G02611191Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    TERMINAL 1 VOLTAGE CHECKING RESULT

    Voltage Conclusion Proceed to
    Battery voltage Wire harness (EVAP VSV - Power source) is OK. OK
    0 to 3 V Wire harness (EVAP VSV - Power source) is short circuit. NG
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: Go to next step 
  35. CHECK WIRE HARNESS AND CONNECTOR (EVAP VSV - ECM) 
    1. Turn the ignition switch OFF.
    2. Disconnect the E7 ECM connector.
    3. Turn the ignition switch ON.
    4. Measure the voltage between the terminal 34 of the wire harness side and body ground.
    Fig 43: Identifying E7 ECM Connector Terminal
    G02611192Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    ECM CONNECTOR TERMINAL 34 VOLTAGE CHECKING RESULT

    Voltage Conclusion Proceed to
    Battery voltage Wire harness (EVAP VSV - ECM) is OK. OK
    0 to 3V Wire harness (EVAP VSV - ECM) is short circuit. NG
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: CHECK AND REPLACE ECM 
  36. CHECK FUEL TANK CAP 
    1. Connect the fuel tank cap to the gas cap adaptor.
    2. Connect the pressure hose from the pump to the gas cap adaptor.
    3. Plug the gas cap adaptor port.
    4. Turn the pump ON and pressurize the gas cap adaptor by 24 - 28 mmHg. If the pressure does not reach to 24 mmHg within 45 seconds, stop the pump. The fuel tank cap is malfunctioning.
    5. Turn the pump OFF and seal the pressure line to maintain the pressure.
    6. Measure the pressure change for 2 minutes. If the pressure drops to lower than 15 mmHg, the fuel tank cap is malfunctioning.

      Standard: The fuel tank cap keeps the pressure that is 15 mmHg or higher. 

    1. NG: REPLACE FUEL TANK CAP 
    2. OK: Go to next step 
  37. CHECK LEAK 
    NOTE: DO NOT apply the EVAP system to the pressure that is higher than 35 mmHg. The EVAP system will be damaged.
    1. Connect the pressure line from the pump to the EVAP service port.
    2. Turn the ignition switch ON but the engine is not running.
    3. Turn the CCV (vent valve) is ON (close) using the hand-held tester. Select the hand-held tester me nus: DIAGNOSIS, ENHANCED OBD II, ACTIVE TEST and CAN CTRL VSV.
    4. Turn the pump ON and pressurize the EVAP system by 24 - 28 mmHg.
    5. Turn the pump OFF and seal the pressure line to maintain the pressure. If the pressure does not reach to 24 mmHg within 45 seconds, stop the pump. A leakage is in the EVAP system. If the system has a small leak, a whistling sound may be heard.
    6. Measure the pressure change for 2 minutes. If the pressure drops to lower than 15 mmHg, a leakage is in the EVAP system.

      Standard: The EVAP system keeps the pressure that is 15 mmHg or higher. 

    1. NG: Go to step 38 
    2. OK: NO LEAKAGE IN EVAP SYSTEM 
  38. LOOK FOR LEAK POINT 
    1. Apply the soapy water on suspected components.
    2. Turn the CCV (vent valve) is ON (close) using the hand held tester. Select the hand-held tester menus: DIAGNOSIS, ENHANCED OBD II, ACTIVE TEST and CAN CTRL VSV.
    3. Turn the pump ON and pressurize the EVAP system by 24 - 28 mmHg.
    4. Turn the pump OFF and seal the pressure line to maintain the pressure. If the pressure does not reach to 24 mmHg within 45 seconds, stop the pump.
    5. Check bubbles to find the leak point:
      • EVAP service port
      • Canister
      • Hose connections/Lines
      • Fuel cap
      • Fuel filler neck
      • Purge line
      • EVAP VSV
      • CCV (vent valve)
      • Fuel pump sending unit
    6. Repair or replace the leak component.
    7. Perform the EVAP system check to confirm no leak.
    Fig 44: Looking For Leak Point
    G02611193Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NEXT: Go to next step 

    Go to step   4 

  39. CHECK EVAP VSV 
    1. Connect the vacuum gauge to the EVAP service port.
      Fig 45: Connecting Vacuum Gauge To EVAP Service Port
      G02611194Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Start the engine.
      2. Switch the EVAP VSV using the hand-held tester. Select the hand-held tester menus: DIAGNOSIS, ENHANCED OBD II, ACTIVE TEST and EVAP VSV.
      3. Check the vacuum when switching the EVAP VSV. If the vacuum gauge indicates negative value when the EVAP VSV is ON, the EVAP VSV is functioning normally.

        OK: 

        The vacuum gauge indicates negative value when the EVAP VSV is ON. 

    1. NG: Go to step   33 
    2. OK: Go to next step 

    Go to step   17 

  40. CHECK MONITOR STATUS AND DTC 
    1. Clear DTCs.
    2. Perform a drive pattern test (see READINESS MONITOR DRIVE PATTERN ).
    3. Check that the monitor result is PASS.
    4. Confirm no pending DTC.

    NEXT: Go to next step 

    REPAIR IS COMPLETE 

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