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Home >> Hyundai >> 2006 >> Accent Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 2) >> DTC Troubleshooting Procedures >> DTC P0450 EVAP. Emission System-Pressure Sensor/Switch >> Component Inspection

Component Inspection

  1. Check FTPS
    1. Key "ON".
    2. Disassemble FTPS. (Don't disconnect FTPS connector.)
    3. Connect the vacuum gauge.
    4. Measure the output voltage with using the vacuum gauge.
      CAUTION: * Be careful while you do this procedure. FTPS would be damaged if you apply vacuum excessively.
      FUEL TANK PRESSURE SENSOR SPECIFICATION

      FTPS Normal Parameter
      Gauge pressure -66.66 hpa (-139.2 lbf/ft2 ) 0 hpa 66.66 hpa (139.2 lbf/ft2 )
      Voltage 0.5 V 2.5 V 4.5 V
      Fig 1: Measuring Output Voltage Of Fuel Tank Pressure Sensor
      G04801743
    5. Is the measured voltage within specification ?

      YES  : --> Substitute with a known-good ECM/PCM and check for proper operation. If the problem is corrected, replace ECM/PCM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

      NO  : --> Substitute with a known-good FTPS and check for proper operation. If the problem is corrected, replace FTPS and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

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