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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  (J 41413-100) operation manual for detailed instructions in Evaporative Emission System Diagnosis . See Special Tools .
  1. Connect the J 41413-200  nitrogen/smoke hose to the J 41413-311  brass cone adapter. Disconnect the hose at the fuel cap end of the GE-41415-50  . See Special Tools . Connect the J 41413-311  to the disconnected hose on the GE-41415-50  . Install the GE-41415-50  filler neck end only to the vehicle.
  2. Seal the system and use the flow meter on the J 41413-200  (J 41413-100), calibrated to 0.51 mm (0.02 in) to determine that there is no leak in the EVAP system.
    • If a leak is detected, use the J 41413-200  (J 41413-100) to apply smoke to the EVAP system at the filler neck until the leak is located.
  3. Start the engine with the J 41413-200  (J 41413-100) 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 gauge on the J 41413-200  (J 41413-100) and the FTP parameter on the scan tool should both show vacuum.
    • If the vacuum/pressure gauge shows vacuum but the FTP parameter does not show vacuum, replace the FTP sensor.
    • If neither the FTP parameter nor the vacuum/pressure gauge 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 gauge on the J 41413-200  (J 41413-100). 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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