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Home >> Lexus >> 2025 >> NX 250 FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 105 (Engine Control System - Diagnostic Codes (P0441-P050B)) >> SFI System >> DTC P0443-13: Evaporative Emission System Purge Control Valve "A" Circuit Open [03/2022 - 03/2023] >> Procedure

DTC P0443-13: Evaporative Emission System Purge Control Valve "A" Circuit Open [03/2022 - 03/2023]: Procedure

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  1. PERFORM ACTIVE TEST USING GTS (ACTIVATE THE EVAP PURGE VSV) 
    1. Disconnect the fuel vapor feed hose assembly (canister side) of the purge VSV.
      GTY1078986Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Purge VSV
      *2 Fuel Vapor Feed Hose Assembly (to Canister)
    2. Put the engine in Inspection Mode (Maintenance Mode).

      Powertrain > Hybrid Control > Utility 

      Tester Display
      Inspection Mode
    3. Start the engine.
    4. When the purge VSV is operated using the GTS, check whether the port of the purge VSV applies suction your finger.

      Powertrain > Engine > Active Test 

      Tester Display
      Activate the EVAP Purge VSV

      OK

      GTS Operation Specified Condition
      ON Purge VSV port applies suction to finger
      OFF Purge VSV port applies no suction to finger

      HINT: 

      Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [11/2021 - ] 

    Result: 

    NG 

    See step  2

  2. INSPECT PURGE VSV 

    Refer to INSPECTION [11/2021 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE PURGE VSV. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    OK 

    See step  3

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF PURGE VSV) 
    1. Disconnect the purge VSV connector.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      B23-1 (+B) - Body ground Ignition switch ON 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - PURGE VSV) 

    Result: 

    OK 

    See step  4

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      B23-2 (EVP1) - B48-66 (PRG) Always Below 1 Ω
      B23-2 (EVP1) or B48-66 (PRG) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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