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Home >> Lexus >> 2024 >> RC 350 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 30 (Engine Control System (8AR-FTS) - Diagnostic Codes (05 Of 10)) >> SFI System >> DTC P0441-9C: Evaporative Emission System Incorrect Purge Flow Low/Insufficient Flow [10/2015 - 11/2017] >> Procedure

DTC P0441-9C: Evaporative Emission System Incorrect Purge Flow Low/Insufficient Flow [10/2015 - 11/2017]: Procedure

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  1. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE EVAP PURGE VSV) 
    GTY619291Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 Purge VSV
    *2 Fuel Vapor Feed Hose
    (to Canister)
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Active Test / Activate the EVAP Purge VSV.

      Powertrain > Engine > Active Test 

      Tester Display
      Activate the EVAP Purge VSV
    5. Disconnect the fuel vapor feed hose (connected to the canister) from the purge VSV.
    6. Start the engine.
    7. Using the Techstream, turn on the purge VSV (Activate the EVAP Purge VSV: ON).
    8. Use your finger to confirm that the purge VSV has suction.

      Result

      Test Result Suspected Trouble Area Proceed to
      Suction applied
      • Problems with EVAP hose between canister and purge VSV
      • Canister (charcoal filter inside canister) clogged
      		 A
      No suction
      • Purge VSV stuck closed
      • No. 1 check valve stuck closed
      • Problems with EVAP hose between purge VSV and intake manifold
      • ECM
      		 B

    Result: 

    B 

    See step  7

    Result: 

    A 

    See step  2

  2. INSPECT EVAP HOSE (PURGE VSV - CANISTER) 
    1. Check for blockages in the EVAP purge line between the purge VSV and canister.

      OK

      No blockages in the EVAP purge line between the purge VSV and canister.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  6

    Result: 

    OK 

    See step  3

  3. INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER) 
    1. Check for filter blockage in the canister.

      Refer to INSPECTION [10/2015 - 09/2020]

      OK

      No blockages in the canister.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  4

  4. REPLACE CANISTER PUMP MODULE 
    1. Replace the canister pump module.

      Refer to REMOVAL [10/2015 - 09/2020]

      NOTE:
      • When replacing the canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. If liquids are present in the canister interior, replace the canister, and canister pump module together.
      • Check for filter blockage in the canister. If the charcoal filter inside the canister is clogged, replace the canister and canister pump module together.
      • Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.
      GTY675538Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Fuel Tank Vent Hose *2 Air Inlet Port
      *3 Vent Hose *4 Fuel Tank
      *5 Canister Pump Module *6 Canister
      *7 Canister Filter - -
      *a Inspection Area
      (check for disconnection and/or cracks)      		 - -

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  21

  5. REPLACE CANISTER 
    1. Replace the canister.

      Refer to REMOVAL [10/2015 - 09/2020]

      NOTE:
      • When replacing the canister, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose.
      • Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.
      GTY675538Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Fuel Tank Vent Hose *2 Air Inlet Port
      *3 Vent Hose *4 Fuel Tank
      *5 Canister Pump Module *6 Canister
      *7 Canister Filter - -
      *a Inspection Area
      (check for disconnection and/or cracks)      		 - -

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  21

  6. REPAIR OR REPLACE EVAP PURGE LINE (PURGE VSV - CANISTER) 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  21

  7. INSPECT EVAP HOSE (PURGE VSV - INTAKE MANIFOLD) 
    GTY624156Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 Purge VSV
    *2 Fuel Vapor Feed Hose
    (to intake manifold)
    1. Disconnect the fuel vapor feed hose (connected to the intake manifold) from the purge VSV.
    2. Start the engine.
    3. Use your finger to confirm that the fuel vapor feed hose has suction.

      Result

      Test Result Suspected Trouble Area Proceed to
      Suction applied EVAP hose between purge VSV and intake manifold normal
      • Purge VSV
      • Purge VSV power source
      • Wire harness or connector between purge VSV and ECM
      • ECM
      		 A
      No suction
      • No. 1 check valve
      • Intake manifold port
      • EVAP hose between purge VSV and intake manifold
      		 B

    Result: 

    B 

    See step  16

    Result: 

    A 

    See step  8

  8. INSPECT PURGE VSV 
    GTY503380Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 Purge VSV
    1. Remove the purge VSV.
    2. Apply battery voltage to the terminals of the purge VSV.
    3. Confirm that air flows from port E to port F.

      Result

      Test Result Condition Suspected Trouble Area Proceed to
      Air flows Battery voltage is applied to purge VSV terminals Purge VSV normal
      • Purge VSV power source
      • Wire harness or connector between purge VSV and ECM
      • ECM
      		 A
      No air flow Battery voltage is applied to purge VSV terminals Purge VSV B

    Result: 

    B 

    See step  15

    Result: 

    A 

    See step  9

  9. CHECK TERMINAL VOLTAGE (POWER SOURCE OF PURGE VSV) 
    GTY677813Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Front view of wire harness connector
    (to Purge VSV)
    1. Disconnect the purge VSV connector.
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Result

      Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to
      F22-1 - Body ground Engine switch on (IG) 11 to 14 V Purge VSV power source normal
      • Wire harness or connector between purge VSV and ECM
      		 A
      Other than result above Wire harness or connectors between purge VSV and battery B

    Result: 

    B 

    See step  12

    Result: 

    A 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM) 
    1. Disconnect the ECM connector.
    2. Disconnect the purge VSV connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F22-2 - F67-70 (PRG) Always Below 1 Ω
      F22-2 or F67-70 (PRG) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  14

    Result: 

    OK 

    See step  11

  11. REPLACE ECM 
    1. Replace the ECM.

      Refer to REMOVAL [10/2015 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  21

  12. CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR PWR INTEGRATION ECU - PURGE VSV) 
    1. Disconnect the semiconductor pwr integration ECU connector.
    2. Disconnect the purge VSV connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      2G-1 - F22-1 Always Below 1 Ω
      2G-1 or F22-1 - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  14

    Result: 

    OK 

    See step  13

  13. REPLACE SEMICONDUCTOR POWER INTEGRATION ECU 
    1. Replace the semiconductor pwr integration ECU.

      Refer to REMOVAL [09/2014 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  21

  14. REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  21

  15. REPLACE PURGE VSV 
    1. Replace the purge VSV.

      Refer to REMOVAL [10/2015 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  21

  16. INSPECT NO. 1 CHECK VALVE 
    1. Inspect the No. 1 check valve.

      Refer to PROCEDURE - Step 2

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  20

    Result: 

    OK 

    See step  17

  17. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT) 
    1. Stop the engine.
    2. Disconnect the EVAP hose from the intake manifold.
    3. Start the engine.
    4. Use your finger to confirm that the port of the intake manifold has suction.

      Result

      Tester Connection Suspected Trouble Area Proceed to
      Suction applied EVAP hose between intake manifold and purge VSV A
      No suction Intake manifold (upper intake manifold) B

    Result: 

    B 

    See step  19

    Result: 

    A 

    See step  18

  18. REPAIR OR REPLACE EVAP PURGE LINE (INTAKE MANIFOLD - PURGE VSV) 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  21

  19. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT) 
    1. Check that the EVAP purge port of the intake manifold is not clogged. If necessary, replace the intake manifold.

      Refer to REMOVAL [10/2015 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  21

  20. REPLACE NO. 1 CHECK VALVE 
    1. Replace the No. 1 check valve.

      Refer to REMOVAL [10/2015 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  21

  21. CHECK WHETHER DTC OUTPUT RECURS (DTC P0441-9C) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Powertrain > Engine > Clear DTCs 

    5. Turn the engine switch off and wait for at least 30 seconds.
    6. Start the engine.
    7. Turn the Techstream on.
    8. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    9. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

      Powertrain > Engine > Utility 

      Tester Display
      All Readiness
    10. Input the DTC: P0441-9C.
    11. Check the DTC judgment result.
      Techstream Display Description
      NORMAL
      • DTC judgment completed
      • System normal
      ABNORMAL
      • DTC judgment completed
      • System abnormal
      INCOMPLETE
      • DTC judgment not completed
      • Perform driving pattern after confirming DTC enabling conditions

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    END 

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