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Home >> Chevrolet >> 2014 >> Spark LS, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 1.2L - DTC P0010 To DTC P0446 >> Diagnostic Information and Procedures >> DTC P0446 >> Circuit/System Testing
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Circuit/System Testing

NOTE:

Perform the Circuit/System Verification before proceeding with the Circuit/System Testing.

  1. Test for a blockage or restrictions in the EVAP system components listed below and repair as necessary.
    • Evaporative Emission Vent System Hoses
    • Evaporative Emission Canister
    • Q13 Evaporative Emission Vent Solenoid Valve
    • Evaporative Emission Vent Filter
  2. Reconnect all previously disconnected EVAP hardware.
    3. NOTE:

    Refer to the GE 41413-A  Evaporative Emissions System Tester (EEST) operation manual for detailed instructions in Evaporative Emission System Diagnosis

  3. Remove the fuel fill cap and connect the CH 41415-30  Fuel Tank Cap Adapter to the fuel tank filler neck. Connect the GE 41413-A  Evaporative Emissions System Tester (EEST) to the CH 41415-30  Fuel Tank Cap Adapter.
  4. Ignition ON, seal the EVAP system with a scan tool.
  5. Turn the nitrogen/smoke valve on the GE 41413-A  Evaporative Emissions System Tester (EEST) to nitrogen.
    6. NOTE:

    DO NOT exceed the specified value in this step. Exceeding the specified value may produce incorrect test results.

  6. Use the remote switch to activate the GE 41413-A  Evaporative Emissions System Tester (EEST) and pressurize the fuel tank to 5.0 in H20.
  7. Verify the scan tool Fuel Tank Pressure Sensor parameter is 0 in H20 when commanding the EVAP Vent Solenoid Valve to OFF.
    • If not 0 in H20 

      Test for a blockage or a restriction in the EVAP vent hose or inlet. If the inlet or hose test normal, replace the Q13 Evaporative Emission Vent Solenoid Valve.

    • If 0 in H20 
  8. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
    • If the DTC sets 

      Refer to step 1 above.

    • If the DTC does not set 
  9. All OK.
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