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Home >> Chevrolet >> 2011 >> Caprice >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.0L - DTC Diagnostics And Troubleshooting >> Diagnostic Information and Procedures >> DTC P0442 >> Circuit/System Testing

Circuit/System Testing

NOTE:
  • Refer to the GE 41413-A  Evaporative Emissions System Tester (EEST) operation manual for detailed instructions in Evaporative Emission System Diagnosis .
  • Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.
  • Ensure that the underbody temperature of the vehicle and the tester are similar.
  1. Disconnect the purge tube at the quick connector on the EVAP canister side of the Q12 evaporative emission purge solenoid valve and install the CH 48096  Port Tool.
  2. Connect the GE 41413-A  EEST to the CH 48096  Port Tool.
  3. Ignition ON, using a scan tool close the EVAP vent solenoid valve to seal the EVAP system.
  4. Use the flow meter on the GE 41413-A  EEST, 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 GE 41413-A  EEST to apply smoke to the EVAP system at the purge tube until the leak is located using the J 41413-SPT  White Light.
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