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Home >> Lexus >> 2013 >> GX 460 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0300 - P060D)) >> SFI System >> DTC P0443: Evaporative Emission Control System Purge Control Valve Circuit >> Procedure
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DTC P0443: Evaporative Emission Control System Purge Control Valve Circuit: Procedure

  1. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR EVAP CONTROL) 
    1. Connect a Techstream to the DLC3.
      GTY343079Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the vacuum hose (charcoal canister side) from the purge VSV.
    3. Start the engine.
    4. Turn the Techstream on.
    5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for EVAP Control.
    6. When the purge VSV is operated using the Techstream, check whether the port of the purge VSV applies suction to your finger.
      OK

      Tester Operation Specified Condition
      VSV ON Purge VSV port applies suction to finger
      VSV OFF Purge VSV port applies no suction to finger
      TEXT IN ILLUSTRATION

      *1 Purge VSV
      *2 Hose (to Canister)

    NG → See step   2 

    OK → See step   6 

  2. INSPECT PURGE VSV (RESISTANCE) 
    1. Inspect the purge VSV. Refer to INSPECTION [06/2012 - ] .

    NG → See step   7 

    OK: Go to next step 

  3. INSPECT PURGE VSV (POWER SOURCE) 
    1. Disconnect the purge VSV connector.
      GTY394637Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.
      STANDARD VOLTAGE

      Tester Connection Switch Condition Specified Condition
      C8-1 - Body ground Engine switch on (IG) 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Purge VSV)

    NG → See step   5 

    OK: Go to next step 

  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
      C8-2 - C30-18 (PRG) Always Below 1 Ω
      C8-2 or C30-18 (PRG) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   9 

  5. CHECK HARNESS AND CONNECTOR (PURGE VSV - INTEGRATION RELAY) 
    1. Disconnect the purge VSV connector.
    2. Remove the No. 1 integration relay from the engine room relay block.
    3. Measure the resistance according to the value(s) in the table below.
      STANDARD RESISTANCE

      Tester Connection Condition Specified Condition
      C8-1 - 1B-4 Always Below 1 Ω
      C8-1 or 1B-4 - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR OR REPLACE FUSE 

    OK → See step   8 

  6. CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [06/2012 - ] 
  7. REPLACE PURGE VSV. Refer to  REMOVAL [06/2012 - ] 
  8. CHECK ECM POWER SOURCE CIRCUIT. Refer to  ECM Power Source Circuit 
  9. REPLACE ECM. Refer to  REMOVAL [06/2012 - ] 
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