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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 364 (Engine Controls And Fuel - 5.3L, 6.0L & 6.2L - DTC P0443 Through DTC P3449 And Troubleshooting) >> Diagnostic Information and Procedures >> DTC P0443 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, engine OFF, command the EVAP purge solenoid to 50 percent with a scan tool. You should hear the solenoid clicking when commanded to 50 percent.
  2. Engine Idling, command the EVAP purge solenoid from 0 to 50 percent and back to 0 percent with a scan tool while observing the following control circuit status parameters:
      NOTE:

      Each parameter should display OK or Not Run.

    • EVAP Purge Sol Short Gnd Test Status
    • EVAP Purge Sol Open Test Status
    • EVAP Purge Sol Short Volts Test Status
  3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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