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Home >> Subaru >> 2004 >> Forester XT, Standard >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0246: Turbo/Super Charger WASTEGATE Solenoid "A" High

DTC P0246: Turbo/Super Charger WASTEGATE Solenoid "A" High

  1. OUTLINE OF DIAGNOSIS 

    Detect the open or short circuit of wastegate control solenoid valve.

    Judge NG when the terminal output voltage remains Low or High during outputting the duty signal.

  2. COMPONENT DESCRIPTION 
    Fig 1: Identifying Turbo/Super Charger Wastegate Solenoid
    G03320252Courtesy of SUBARU OF AMERICA, INC.
  3. ENABLE CONDITION 
    ENABLE CONDITION CHART

    Secondary Parameters Enable Conditions
    Battery voltage > 10.9 V
    After engine starting 1 second or more
  4. GENERAL DRIVING CYCLE 

    Perform the diagnosis continuously after engine starts.

  5. DIAGNOSTIC METHOD 
    • Abnormality Judgment 

      Judge NG when the continuous time until completing the malfunction criteria below becomes more than 655 milliseconds.

      Judgment Value 

      JUDGMENT VALUE CHART

      Malfunction Criteria Threshold Value
      Terminal output voltage High
      Duty ratio for turbocharged pressure control > 25%

      Time Needed for Diagnosis:  655 milliseconds

      Malfunction Indicator Light Illumination:  Illuminates as soon as the malfunction occurs.

    • Normality Judgment 

      Judge OK and clear the NG when the malfunction criteria below are completed.

      Judgment Value 

      JUDGMENT VALUE CHART

      Malfunction Criteria Threshold Value
      Terminal output voltage Low
  6. DTC CLEAR CONDITION 
    • When the OK idling cycle was completed 40 times in a row
    • When "Clear Memory" was performed
  7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION 
    • When the OK driving cycle was completed 3 times in a row
    • When "Clear Memory" was performed
  8. FAIL SAFE 

    None

  9. ECM OPERATING AT DTC SETTING 

    Memorize the freeze frame data. (For test mode $02)