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Home >> Chevrolet >> 2011 >> Chevy Express G2500, Van Cargo Extended, 6.6 L >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 4.3L - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P0442 >> Circuit/System Testing

Circuit/System Testing

IMPORTANT:
  • Refer to the J 41413-200  evaporative emissions system tester 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. Connect the J 41413-200  evaporative emissions system tester 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  EVAP service access port tool.
  2. Using a 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  evaporative emissions system tester to apply smoke to the EVAP system at the service port or the purge tube until the leak is located using the GE-41413-SPT  high intensity white light.
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