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Home >> Suzuki >> 2006 >> Swift + >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 1.6L (L91) - DTC P0420 To DTC P2076 >> DTC P0451 or P0454 >> Circuit/System Testing
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Circuit/System Testing

  1. DTC P0454 is set Inspect for an intermittent and for a poor connection at the FTP sensor and the engine control module (ECM).
  2. Remove the fuel fill cap. Connect the GE-41415-50  to the fuel tank filler neck. See Special Tools . Connect the J 41413-200  to the J 41415-50  . See Special Tools .
    IMPORTANT: The EVAP vent solenoid valve will not remain closed when commanded ON with positive pressure applied to the EVAP system.
  3. Disconnect the EVAP vent line from the vent solenoid, and seal it, using the correct plug from the J 41413-300.
  4. Pressurize the EVAP system with nitrogen to 5 inches H20. Compare the Fuel Tank Pressure Sensor parameter with a scan tool to the J 41413-200  pressure/vacuum gage. See Special Tools . The scan tool FTP sensor parameter should be within 1 inch H20 of the pressure/vacuum gage.
    • If the FTP sensor parameter is not within 1 inch H20 of the pressure/vacuum gage, replace the FTP sensor.
  5. Command the vent solenoid valve OPEN with a scan tool.
    • If the FTP sensor parameter is not 0 inch H20, replace the FTP sensor.
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