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Home >> Cadillac >> 2007 >> XLR Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 4.6L (LH2) - DTC P0340 To DTC P2544 >> DTC P0455 >> Circuit/System Testing

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.
  1. Using the GE-41415-50  , connect the J 41413-200  to the vehicle filler neck.
  2. Seal the EVAP system and use the flow meter on the J 41413-200  , calibrated to 0.51 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. For vehicles without a service port, disconnect the purge tube at the quick connector on the EVAP canister side of the purge solenoid valve and install the CH-48096  .
  3. Start the engine with the J 41413-200  connected to the fuel filler neck.
  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 20 percent.
  7. The vacuum/pressure gage on the J 41413-200  and the FTP parameter on the scan tool should both show vacuum.
    • If the vacuum/pressure gage on the J 41413-200  does not show vacuum, inspect for a restricted 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  .
    • If the values are not similar or the voltage did not reach 3.2 volts, replace the FTP sensor.
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