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Home >> Suzuki >> 2007 >> XL7 Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0455 >> Circuit/System Testing >> Blockage/Restriction Testing
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Blockage/Restriction Testing

  1. Connect the GE-41415-50 to the fuel tank filler neck. Connect the J 41413-200 to the GE-41415-50.
  2. Disconnect the EVAP vent line from the vent solenoid, and seal it, using the correct plug from the J 41413-300.
  3. 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 gauge. The scan tool FTP sensor parameter should be within 1 inch H20 of the pressure/vacuum gauge.
    • If the FTP sensor parameter is not within 1 inch H20 of the pressure/vacuum gage, replace the FTP sensor.
  4. Increase the EVAP purge solenoid to 100 percent. The FTP sensor pressure should drop to less than 1 in H2O.
    • If the FTP sensor parameter is greater than 1 in H2O, disconnect the EVAP pipes listed below one at a time while observing the FTP sensor parameter with a scan tool. If the FTP sensor parameter drops to less than 1 in H2O when a pipe is disconnected, repair the blockage or restriction in the one of the following EVAP pipe/hoses:
    1. EVAP purge vacuum source from the EVAP purge solenoid
    2. EVAP purge pipe from the EVAP purge solenoid
    3. EVAP purge pipe at the EVAP canister
    4. EVAP vapor pipe at the EVAP canister
  5. If you cannot locate a condition with the EVAP system, refer to DIAGNOSTIC AIDS  for additional information.
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