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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 463 (Engine Control System (SFI) - Diagnostics) >> DTC P0441: Evaporative Emission Control System Incorrect Purge Flow, DTC P0446: Evaporative Emission Control System Vent Control Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Hand-held Tester: 

  1. CHECK FUEL TANK CAP ASSY (CHECK THAT FUEL TANK CAP IS TOYOTA GENUINE PARTS) 
    • NG : REPLACE TO TOYOTA GENUINE PARTS 
    • OK : GO TO NEXT STEP 
  2. CHECK THAT FUEL TANK CAP IS CORRECTLY INSTALLED 
    • NG : CORRECTLY INSTALL FUEL TANK CAP 
    • OK : GO TO NEXT STEP 
  3. : INSPECT FUEL TANK CAP ASSY (See  EMISSION CONTROL SYSTEM  ) 
    • NG : REPLACE FUEL TANK CAP ASSY 
    • OK : GO TO NEXT STEP 
  4. CHECK FILLER NECK FOR DAMAGE 
    1. Remove the fuel tank cap.
    2. Visually check the fuel inlet pipe for damage.
    3. Reinstall the fuel tank cap.
    • NG : REPLACE FUEL TANK INLET PIPE SUB-ASSY 
    • OK : GO TO NEXT STEP 
  5. : PERFORM ACTIVE TEST BY HAND-HELD TESTER (CHECK FOR EVAP PURGE FLOW) 
    1. Select the item "DIAGNOSIS/ENHANCED OBD II/ACTIVE TEST" mode on the hand-held tester.
    2. Disconnect the vacuum hose of the VSV for EVAP from the charcoal canister.
    3. Start the engine.
    4. Select the item "EVAP VSV (ALON)/ALL" in the ACTIVE TEST and operate EVAP VSV (Press the right or left button).
    5. When the VSV for the EVAP is operated by the hand-held tester, check whether the disconnected hose applies suction to your finger.

      Result: 

      VSV is ON: Disconnected hose sucks. 

      VSV is OFF: Disconnected hose does not suck. 

    6. Reconnect the vacuum hose.
    Fig 1: Checking EVAP Purge Flow
    G03946661Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • OK : Go to step   9 
    • NG : GO TO NEXT STEP 
  6. CHECK VACUUM HOSES (INTAKE MANIFOLD - VSV FOR EVAP, VSV FOR EVAP CHARCOAL CANISTER) 
    1. Check that the vacuum hose is connected correctly.
    2. Check the vacuum hose for looseness and disconnection.
    3. Check the vacuum hose for cracks, hole, damage and blockage.
    • NG : REPAIR OR REPLACE VACUUM HOSE 
    • OK : GO TO NEXT STEP 
  7. : INSPECT VSV FOR EVAP (OPERATION) (See  EMISSION CONTROL SYSTEM  ) 
    • NG : REPLACE VSV FOR EVAP 
    • OK : GO TO NEXT STEP 
  8. CHECK HARNESS AND CONNECTOR (EFI RELAY - VSV FOR EVAP, VSV FOR EVAP - ECM) 
    1. Check the harness and the connector between the VSV for EVAP and the ECM.
      1. Disconnect the V3 VSV for EVAP connector.
      2. Disconnect the E3 ECM connector.
      3. Check the resistance between the wire harness side connectors.
        Fig 2: Identifying V3 VSV For EVAP Connector Terminal
        G03946662Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for open): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for EVAP (V3-1) - EVP (E3-12) Below 1 Ω

        Standard (Check for short): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for EVAP (V3-1) or EVP (E3-12) - Body ground 10 kΩ or higher
      4. Reconnect the VSV for EVAP connector.
      5. Reconnect the ECM connector.
    2. Check the harness and the connector between the VSV for EVAP and the EFI relay.
      1. Disconnect the V3 VSV for EVAP connector.
      2. Remove the EFI relay from the engine room R/B.
      3. Check the resistance between the wire harness side connectors.
        Fig 3: Identifying E3 ECM Connector
        G03946663Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for open): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for EVAP (V3-2) - EFI relay (3) Below 1 Ω

        Standard (Check for short): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for EVAP (V3-2) or EFI relay (3) - Body ground 10 kΩ or higher
      4. Reconnect the VSV for EVAP connector.
      5. Reinstall the EFI relay.
        Fig 4: Removing EFI Relay From Engine Room R/B
        G03946664Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
    • OK : REPLACE ECM (See  REPLACEMENT  ) 
  9. : PERFORM ACTIVE TEST BY HAND-HELD TESTER (VSV FOR CCV) 
    1. Disconnect the vacuum hose of the VSV for CCV from the charcoal canister.
    2. Start the engine.
    3. Select the item "DIAGNOSIS/ENHANCED OBD II/ACTIVE TEST" mode on the hand-held tester.
    4. Select the item "CAN CTRL VSV/ALL" in the ACTIVE TEST and operate CAN CTRL VSV (Press the right or left button).
    5. Check the VSV operation when it is operated by the hand-held tester.

      Result: 

      VSV is ON: Air from port E flows out through port F. 

      VSV is OFF: Air does not flow from port E to port F. 

      Fig 5: Checking VSV Operation
      G03946665Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • OK : Go to step   13 
    • NG : GO TO NEXT STEP 
  10. CHECK VACUUM HOSES (VSV FOR CCV - CHARCOAL CANISTER) 
    1. Check that the vacuum hose is connected correctly.
    2. Check the vacuum hose for looseness and disconnection.
    3. Check the vacuum hose for cracks, hole, damage and blockage.
    • NG : REPAIR OR REPLACE VACUUM HOSES 
    • OK : GO TO NEXT STEP 
  11. : INSPECT VSV FOR CCV (OPERATION) (See  INSPECTION  ) 
    • NG : REPLACE VSV FOR CCV 
    • OK : GO TO NEXT STEP 
  12. CHECK HARNESS AND CONNECTOR (EFI RELAY - VSV FOR CCV, VSV FOR CCV - ECM) 
    1. Check the harness and connector between the VSV for CCV and ECM.
      1. Disconnect the V2 VSV for CCV connector.
      2. Disconnect the E5 ECM connector.
      3. Check the resistance between the wire harness side connectors.

        Standard (Check for open): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for CCV (V2-1) - CCV (E5-1) Below 1 Ω
        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for CCV (V2-1) or CCV (E5-1) - Body ground 10 kΩ or higher
        Fig 6: Identifying V2 VSV For CCV Connector Terminal
        G03946666Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Reconnect the VSV for CCV connector.
      5. Reconnect the ECM connector.
    2. Check the harness and the connector between the VSV for CCV and the EFI relay.
      1. Disconnect the V2 VSV for CCV connector.
      2. Remove the EFI relay from the engine room R/B.
      3. Check the resistance between the wire harness side connectors.
        Fig 7: Identifying E5 ECM Connector
        G03946667Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for open): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for CCV (V2-2) - EFI relay (3) Below 1 Ω

        Standard (Check for short): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for CCV (V2-2) or EFI relay (3) - Body ground 10 kΩ or higher
      4. Reconnect the VSV for CCV connector.
      5. Reinstall the EFI relay.
      Fig 8: Removing EFI Relay From Engine Room R/B
      G03946668Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
    • OK : REPLACE ECM (See  REPLACEMENT  ) 
  13. : PERFORM ACTIVE TEST BY HAND-HELD TESTER (VSV FOR PRESSURE SWITCHING VALVE) 
    1. Select the item "DIAGNOSIS/ENHANCED OBD II/ACTIVE TEST" mode on the hand-held tester.
    2. Select the item "TANK BYPASS VSV/ALL" in the ACTIVE TEST and operate TANK BYPASS VSV (Press the right or left button).
    3. Check the VSV operation when it is operated by the hand-held tester.

      Result: 

      VSV is ON: Air from port E flows out through port F. 

      VSV is OFF: Air does not flow from port E to port F. 

    Fig 9: Checking VSV Operation
    G03946669Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • OK : Go to step   16 
    • NG : GO TO NEXT STEP 
  14. : INSPECT VSV FOR PRESSURE SWITCHING VALVE (OPERATION) 
    • NG : REPLACE VSV FOR PRESSURE SWITCHING VALVE 
    • OK : GO TO NEXT STEP 
  15. CHECK HARNESS AND CONNECTOR (EFI RELAY - VSV FOR PRESSURE SWITCHING VALVE, VSV FOR PRESSURE SWITCHING VALVE - ECM) 
    1. Check the harness and the connector between the VSV for pressure switching valve and the ECM.
      1. Disconnect the V5 VSV for pressure switching valve connector.
      2. Disconnect the E6 ECM connector.
      3. Check the resistance between the wire harness side connectors.
        Fig 10: Identifying V5 VSV For Pressure Switching Valve Connector
        G03946670Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for open): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for pressure switching valve (V5-1) - TBP (E6-4) Below 1 Ω

        Standard (Check for short): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for pressure switching valve (V5-1) or TBP (E6-4) - Body ground 10 kΩ or higher
      4. Reconnect the VSV for pressure switching valve connector.
      5. Reconnect the ECM connector.
      Fig 11: Identifying E6 ECM Connector
      G03946671Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the harness and the connector between the VSV for pressure switching valve and the EFI relay.
      1. Disconnect the V5 VSV for pressure switching valve connector.
      2. Remove the EFI relay from the engine room R/B.
      3. Check the resistance between the wire harness side connectors.

        Standard (Check for open): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for pressure switching valve (V5-2) - EFI relay (3) Below 1 Ω

        Standard (Check for short): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for pressure switching valve (V5-2) or EFI relay (3) - Body ground 10 kΩ or higher
      4. Reconnect the VSV for pressure switching valve connector.
      5. Reinstall the EFI relay.
      Fig 12: Removing EFI Relay From Engine Room R/B
      G03946672Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
    • OK : REPLACE ECM (See  REPLACEMENT  ) 
  16. : CHECK FOR EVAPORATIVE EMISSIONS LEAK (NEAR FUEL TANK) 
    1. Check whether hoses close to the fuel tank have been modified, and check if there are signs of any accident near the fuel tank.
      1. Check the following parts for cracks, deformation or loose connection:
        • Fuel tank
        • Fuel tank filler pipe
        • Hoses and tubes around fuel tank
    Fig 13: Checking Evaporative Emissions Leak (Near Fuel Tank)
    G03946673Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • NG : REPAIR OR REPLACE EVAPORATIVE EMISSIONS LEAK PART 
    • OK : GO TO NEXT STEP 
  17. CHECK VACUUM HOSES (VAPOR PRESSURE SENSOR - FUEL TANK, CHARCOAL CANISTER - VSV FOR PRESSURE SWITCHING VALVE) 
    1. Check that the vacuum hose is connected correctly.
    2. Check the vacuum hose for looseness and disconnection.
    3. Check the vacuum hose for cracks, hole and damage.
    • NG : REPAIR OR REPLACE VACUUM HOSE 
    • OK : GO TO NEXT STEP 
  18. CHECK HOSE AND TUBE (FUEL TANK - CHARCOAL CANISTER) 
    1. Check the connection between the fuel tank and fuel EVAP pipe, the fuel EVAP pipe and under-floor fuel tube, the under-floor fuel tube and charcoal canister.
    2. Check the hose and the tube for cracks, hole and damage.
    • NG : REPAIR OR REPLACE HOSE AND TUBE 
    • OK : GO TO NEXT STEP 
  19. : INSPECT ECM (VC VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage between the terminals of the E3 ECM connector.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      VC(E3-18)-E2(E3-28) 4.5 to 5.5 V
    Fig 14: Measuring Voltage Between Terminals Of E3 ECM Connector
    G03946674Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • NG : REPLACE ECM (See  REPLACEMENT  ) 
    • OK : GO TO NEXT STEP 
  20. : INSPECT ECM (PTNK VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage between terminals of the E3 and E6 ECM connectors.
      1. Disconnect the vacuum hose from the vapor pressure sensor.

        Standard (1): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        PTNK (E6-21) - E2 (E3-28) 2.9 to 3.7 V
        Fig 15: Measuring Voltage Between Terminals Of E3 And E6 ECM Connectors
        G03946675Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE: The vacuum applied to the vapor pressure sensor must be less than 66.7 kPa (500 mmHg, 19.7 in.Hg).
      2. Using the MITYVAC (Hand-held Vacuum Pump), apply a vacuum of 4.0 kPa (30 mmHg, 1.18 in.Hg) to the vapor pressure sensor.

        Standard (2): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        PTNK (E6-21) - E2 (E3-28) 0.5 V or less
        Fig 16: Disconnecting Vacuum Hose From Vapor Pressure Sensor
        G03946676Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Reconnect the vacuum hose.
    • OK : Go to step   22 
    • NG : GO TO NEXT STEP 
  21. CHECK HARNESS AND CONNECTOR (VAPOR PRESSURE SENSOR - ECM) 
    1. Disconnect the V4 vapor pressure sensor connector.
    2. Disconnect the E3 and E6 ECM connectors.
    3. Check the resistance between the wire harness side connectors.

      Standard (Check for open): 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      PTNK (V4-2) - PTNK (E6-21) Below 1 Ω
      GND (V4-1) - E2 (E3-28)
      VCC (V4-3) - VC (E3-18)
      Fig 17: Identifying V4 Vapor Pressure Sensor Connector
      G03946677Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      PTNK (V4-2) or PTNK (E6-21) - Body ground 10 kΩ or higher
      VCC (V4-3) or VC (E3-18) - Body ground
    4. Reconnect the vapor pressure sensor connector.
    5. Reconnect the ECM connectors.
    Fig 18: Identifying E3 And E6 ECM Connectors Terminal
    G03946678Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • NG : REPAIR OR REPLACE HARNESS OF CONNECTOR 
    • OK : REPLACE ECM (See  REPLACEMENT  ) 
  22. : INSPECT FUEL TANK INLET VALVE ASSY 
    • NG : REPLACE FUEL TANK INLET VALVE ASSY 
    • OK : GO TO NEXT STEP 
  23. : INSPECT FUEL TANK ASSY 
    • NG : REPLACE FUEL TANK ASSY 
    • OK : GO TO NEXT STEP 
  24. : INSPECT CHARCOAL CANISTER ASSY (CRACKS, HOLE AND DAMAGE) 
    • NG : REPAIR OR REPLACE CHARCOAL CANISTER ASSY 
    • OK : REPLACE ECM (See  REPLACEMENT  ) 

OBDII scan tool (excluding Hand-held Tester): 

  1. CHECK FUEL TANK CAP ASSY (CHECK THAT FUEL TANK CAP IS TOYOTA GEHUINE PARTS) 
    • NG : REPLACE TO GENUINE PARTS 
    • OK : GO TO NEXT STEP 
  2. CHECK THAT FUEL TANK CAP IS CORRECTLY INSTALLED 
    • NG : CORRECTLY INSTALL FUEL TANK CAP 
    • OK : GO TO NEXT STEP 
  3. : INSPECT FUEL TANK CAP ASSY (See  EMISSION CONTROL SYSTEM  ) 
    • NG : REPLACE FUEL TANK CAP ASSY 
    • OK : GO TO NEXT STEP 
  4. CHECK FILLER NECK FOR DAMAGE 
    1. Remove the fuel tank cap.
    2. Visually check the fuel inlet pipe for damage.
    • NG : REPLACE FUEL TANK INLET PIPE SUB-ASSY 
    • OK : GO TO NEXT STEP 
  5. CHECK FOR EVAPORATIVE EMISSIONS LEAK (NEAR FUEL TANK OR CHACOAL CANISTER) 
    1. Check whether hoses close to the fuel tank have been modified, and check if there are signs of any accident near the fuel tank or the charcoal canister.
      1. Check the following parts for cracks, deformation or loose connection:
        • Fuel tank
        • Charcoal canister
        • Fuel tank filler pipe
        • Hoses and tubes around fuel tank and charcoal canister
    Fig 19: Checking Evaporative Emissions Leak (Near Fuel Tank Or Charcoal Canister)
    G03946679Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • NG : REPAIR OR REPLACE EVAPORATIVE EMISSIONS LEAK PART 
    • OK : GO TO NEXT STEP 
  6. CHECK VACUUM HOSES (VAPOR PRESSURE SENSOR - FUEL TANK, CHARCOAL CANISTER - VSV FOR PRESSURE SWITCHING VALVE) 
    1. Check that the vacuum hose is connected correctly.
    2. Check the vacuum hose for looseness and disconnection.
    3. Check the vacuum hose for cracks, hole and damage.
    • NG : REPAIR OR REPLACE VACUUM HOSE 
    • OK : GO TO NEXT STEP 
  7. CHECK HOSE AND TUBE (FUEL TANK - CHARCOAL CANISTER) 
    1. Check the connection between the fuel tank and fuel EVAP pipe, the fuel EVAP pipe and under floor fuel tube, the under floor fuel tube and charcoal canister.
    2. Check the hose and the tube for cracks, hole and damage.
    • NG : REPAIR OR REPLACE HOSE AND TUBE 
    • OK : GO TO NEXT STEP 
  8. CHECK VACUUM HOSES ((5), (6), (7), (8) AND (9) IN  Figure  IN CIRCUIT DESCRIPTION) 
    1. Check that the vacuum hose is connected correctly.
    2. Check the vacuum hose for looseness and disconnection.
    3. Check the vacuum hose for cracks, hole and damage.
    • NG : REPAIR OR REPLACE VACUUM HOSES 
    • OK : GO TO NEXT STEP 
  9. : CHECK EACH VSV CONNECTOR FOR LOOSENESS AND DISCONNECTION (VSV FOR EVAP, VSV FOR CCV, VSV FOR PRESSURE SWITCHING VALVE) 
    • NG : REPAIR OR CONNECT VSV AND SENSOR CONNECTOR 
    • OK : GO TO NEXT STEP 
  10. : INSPECT CHARCOAL CANISTER ASSY (CRACKS, HOLE AND DAMAGE) 
    • NG : CHECK AND REPLACE CHARCOAL CANISTER ASSY 
    • OK : GO TO NEXT STEP 
  11. : INSPECT ECM (VC VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure voltage between the terminals of the E3 ECM connector.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      VC (E3-18)-E2 (E3-28) 4.5 to 5.5 V
      Fig 20: Measuring Voltage Between Terminals Of E3 ECM Connector
      G03946680Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • NG : REPLACE ECM (See  REPLACEMENT  ) 
    • OK : GO TO NEXT STEP 
  12. : INSPECT ECM (PTNK VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage between terminals of the E3 and E*** ECM connectors.
      1. Disconnect the vacuum hose from the vapor pressure sensor.

        Standard (1): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        PTNK (E6-21) - E2 (E3-28) 2.9 to 3.7 V
        Fig 21: Measuring Voltage Between Terminals Of E3 And E6 ECM Connectors
        G03946681Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE: The vacuum applied to the vapor pressure sensor must be less than 66.7 kPa (500 mmHg, 19.7 in.Hg).
      2. Using the MITYVAC (Hand-held Vacuum Pump), apply a vacuum of 4.0 kPa (30 mmHg, 1.18 in.Hg) to the vapor pressure sensor.

        Standard (2): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        PTNK (E6-21) - E2 (E3-28) 0.5 V or less
      3. Reconnect the vacuum hose from the vapor pressure sensor.
    Fig 22: Disconnecting Vacuum Hose From Vapor Pressure Sensor
    G03946682Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • OK : Go to step   14 
    • NG : GO TO NEXT STEP 
  13. CHECK HARNESS AND CONNECTOR (VAPOR PRESSURE SENSOR - ECM) 
    1. Disconnect the V4 vapor pressure sensor connector.
    2. Disconnect the E3 and E6 ECM connectors.
    3. Check the resistance between the wire harness side connectors.

      Standard (Check for open): 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      PTNK (V4-2) - PTNK (E6-21) Below 1 Ω
      GND(V4-1)-E2 (E3-28)
      VCC (V4-3)-VC (E3-18)
      Fig 23: Identifying V4 Vapor Pressure Sensor Connector Terminal
      G03946683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      PTNK (V4-2) or PTNK (E6-21) - Body ground 10 kΩ or higher
      VCC (V4-3) or VC (E3-18) - Body ground
    4. Reconnect the vapor pressure sensor connector.
    5. Reconnect the ECM connectors.
    Fig 24: Identifying E3 And E6 ECM Connectors Terminal
    G03946684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
    • OK : REPLACE ECM (See  REPLACEMENT  ) 
  14. INSPECT VSV FOR EVAP (FUNCTION) 
    1. Turn the ignition switch ON.
    2. Check the VSV function.
      1. Connect between terminals EVP and E2 of the ECM connector (VSV ON).

        VSV is ON: 

        Air from port E flows out through port F 

        Fig 25: Inspecting VSV For EVAP (Function)
        G03946685Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Disconnect between terminals EVP and E2 of the ECM connector (VSV OFF).

        VSV is OFF: 

        Air does not flow port E to port F 

    Fig 26: Checking VSV Function
    G03946686Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • OK : Go to step   17 
    • NG : GO TO NEXT STEP 
  15. INSPECT VSV FOR EVAP (OPERATION) (See  INSPECTION  ) 
    • NG : REPLACE VSV FOR EVAP 
    • OK : Go to next step. 
  16. CHECK HARNESS AND CONNECTOR (EFI RELAY - VSV FOR EVAP, VSV FOR EVAP - ECM) 
    1. Check the harness and between the VSV for EVAP and the ECM connector.
      1. Disconnect the V3 VSV for EVAP connector.
      2. Disconnect the E3 ECM connector.
      3. Check the resistance between the wire harness side connectors.
        Fig 27: Identifying V3 VSV For EVAP Connector Terminal
        G03946687Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for open): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for EVAP (V3-1) - EVP (E3-12) Below 1 Ω

        Standard (Check for short): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for EVAP (V3-1) or EVP (E3-12) - Body ground 10 kΩ or higher
      4. Reconnect the VSV for EVAP connector.
      5. Reconnect the ECM connector.
    2. Check the harness and connector between the VSV for EVAP and the EFI relay.
      1. Disconnect the V3 VSV for EVAP connector.
      2. Remove the EFI relay from the engine room R/B.
      3. Check the resistance between the wire harness side connectors.
        Fig 28: Identifying E3 ECM Connector
        G03946688Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for open): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for EVAP (V3-2) - EFI relay (3) Below 1 Ω

        Standard (Check for short): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for EVAP (V3-2) or EFI relay (3) - Body ground 10 kΩ or higher
      4. Reconnect the VSV for EVAP connector.
      5. Reinstall the EFI relay.
    Fig 29: Removing EFI Relay From Engine Room R/B
    G03946689Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
    • OK : REPLACE ECM (See  REPLACEMENT  ) 
  17. INSPECT VSV FOR CCV(FUNCTION) 
    1. Turn the ignition switch ON.
    2. Check the VSV function.
      1. Connect between terminals CCV and E2 of the ECM connector (VSV ON).

        VSV is ON: 

        Air from port E flows out through port F 

      2. Disconnect between terminals CCV and E2 of the ECM connector (VSV OFF).

        VSV is OFF: 

        Air does not flow from port E to port F 

        Fig 30: Inspecting VSV For CCV(Function)
        G03946690Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 31: Checking VSV Function
    G03946691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • OK : Go to step   20 
    • NG : GO TO NEXT STEP 
  18. INSPECT VSV FOR CCV(OPERATION) (See  INSPECTION  ) 
    • NG : REPLACE VSV FOR CCV 
    • OK : Go to next step. 
  19. CHECK HARNESS AND CONNECTOR(EFI RELAY - VSV FOR CCV, VSV FOR CCV -ECM) 
    1. Check the harness and the connector between the VSV for CCV and the ECM.
      1. Disconnect the V2 VSV for CCV connector.
      2. Disconnect the E5 ECM connector.
      3. Check the resistance between the wire harness side connectors.

        Standard (Check for open): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for CCV (V2-1) - CCV (E5-1) Below 1 Ω
        Fig 32: Identifying V2 VSV For CCV Connector Terminal
        G03946692Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for short): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for CCV (V2-1) or CCV (E5-1) - Body ground 10 kΩ or higher
      4. Reconnect the VSV for CCV connector.
      5. Reconnect the ECM connector.
    2. Check the harness and the connector between the VSV for CCV and the EFI relay.
      1. Disconnect the V2 VSV for CCV connector.
      2. Remove the EFI relay from the engine room R/B.
      3. Check the resistance between the wire harness side connectors.
        Fig 33: Identifying E5 ECM Connector Terminal
        G03946693Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for open): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for CCV (V2-2) - EFI relay (3) Below 1 Ω

        Standard (Check for short): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for CCV (V2-2) or EFI relay (3) - Body ground 10 kΩ or higher
      4. Reconnect the VSV for CCV connector.
      5. Reinstall the EFI relay.
    Fig 34: Removing EFI Relay From Engine Room R/B
    G03946694Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
    • OK : REPLACE ECM (See  REPLACEMENT  ) 
  20. INSPECT VSV FOR PRESSURE SWITCHING VALVE (FUNCTION) 
    1. Turn the ignition switch ON.
    2. Check the VSV function.
      1. Connect between terminals TBP and E2 of the ECM connector (VSV ON).

        VSV is ON: Air from port E flows out through port F 

      2. Disconnect between terminals TBP and E2 of the ECM connector (VSV OFF).

        VSV is OFF: Air does not from flow port E to port F 

    Fig 35: Inspecting VSV For Pressure Switching Valve (Function)
    G03946695Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 36: Checking VSV Function
    G03946696Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • OK : Go to step   23 
    • NG : GO TO NEXT STEP 
  21. INSPECT VSV FOR PRESSURE SWITCHING VALVE (OPERATION) (See  INSPECTION  ) 
    • NG : REPLACE VSV FOR PRESSURE SWITCHING VALVE 
    • OK : Go to next step. 
  22. CHECK HARNESS AND CONNECTOR (EFI RELAY - VSV FOR PRESSURE SWITCHING VALVE, VSV FOR PRESSURE SWITCHING VALVE - ECM) 
    1. Check the harness and the connector between the VSV for pressure switching valve and the ECM.
      1. Disconnect the V5 VSV for pressure switching valve connector.
      2. Disconnect the E6 ECM connector.
      3. Check the resistance between the wire harness side connectors.
        Fig 37: Identifying V5 VSV For Pressure Switching Valve Connector
        G03946697Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for open): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for pressure switching valve (V5-1) - TBP (E6-4) Below 1 Ω

        Standard (Check for short): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for pressure switching valve (V5-1) or TBP (E6-4) - Body ground 10 kΩ or higher
      4. Reconnect the VSV for pressure switching valve connector.
      5. Reconnect the ECM connector.
      Fig 38: Identifying E6 ECM Connector Terminal
      G03946698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the harness and the connector between the VSV for pressure switching valve and EFI relay.
      1. Disconnect the V5 VSV for pressure switching valve connector.
      2. Remove the EFI relay from the engine room R/B.
      3. Check the resistance between the wire harness side connectors.

        Standard (Check for open): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for pressure switching valve (V5-2) - EFI relay (3) Below 1 Ω

        Standard (Check for short): 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for pressure switching valve (V5-2) or EFI relay (3) - Body ground 10 kΩ or higher
      4. Reconnect the VSV for pressure switching valve connector.
      5. Reinstall the EFI relay from.
    Fig 39: Removing EFI Relay From Engine Room R/B
    G03946699Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
    • OK : REPLACE ECM (See  REPLACEMENT  ) 
  23. INSPECT FUEL TANK INLET VALVE ASSY 
    • NG : REPLACE FUEL TANK INLET VALVE ASSY 
    • OK : Go to next step. 
  24. INSPECT FUEL TANK ASSY 
    • NG : REPLACE FUEL TANK ASSY 
    • OK : IT IS LIKELY THAT VEHICLE USER DID NOT PROPERLY CLOSE FUEL TANK CAP 
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