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Home >> Chevrolet >> 2009 >> Impala Police >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.9L - DTC P0341 To DTC P2544 >> DTC P0442 >> 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.
    • Ensure that the vehicle underbody temperature is similar to the ambient temperature and allow the surrounding air to stabilize before starting the diagnostic procedure. The system flow will be less with higher temperatures.
    • Refer to the J 41413-200  operation manual for detailed instructions.
  1. Connect the J 41413-200  to the vehicle at the EVAP service port. 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  .
  2. Using the scan tool, close the EVAP canister vent valve to seal the EVAP system.
  3. 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 purge tube until the leak is located using the J 41413-SPT  .
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