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Home >> Pontiac >> 2008 >> Torrent Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.4L - DTC P0401 To DTC P2544 >> DTC P0455 >> Circuit/System Testing
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Circuit/System Testing

IMPORTANT:
  • Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.
  • Refer to the J 41413-200  operation manual for detailed instructions. See Special Tools .
  1. Using the GE-41415-50  , connect the J 41413-200  to the vehicle filler neck. See Special Tools .
  2. Use the flow meter on the J 41413-200  , calibrated to 0. See Special Tools .51 mm (0.020 in) to determine that there is no leak in the EVAP system.
    • If a leak is detected use the J 41413-200  to apply smoke to the EVAP system at the service port or the filler neck until the leak is located. See Special Tools .
  3. Start the engine with the J 41413-200  connected to the fuel filler neck. See Special Tools .
  4. Allow the engine to idle.
  5. Use the Purge/Seal function to seal the system with a scan tool.
  6. Command the EVAP canister purge solenoid valve to 30 percent.
  7. The vacuum/pressure gage on the J 41413-200  and the FTP parameter on the scan tool should both show vacuum. See Special Tools .
    • If the vacuum/pressure gage shows vacuum but the FTP parameter does not show vacuum, replace the FTP sensor.
    • If neither the FTP parameter nor the vacuum/pressure gage shows vacuum, repair the restriction in the purge path.
  8. Verify that the vacuum increases to the abort limit on the scan tool or more than 3.2 volts, and the value is closely similar between the scan tool and the vacuum/pressure gage on the J 41413-200  . See Special Tools .
    • If the values are not similar or the voltage did not reach 3.2 volts, replace the FTP sensor.
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