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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 P2636 >> Circuit/System Verification

Circuit/System Verification

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  1. Verify that DTC P2632 is not set.
  2. Ignition ON, command the Fuel Pump Relay 2 ON and OFF with a scan tool. You should hear and feel the fuel pump relay click with each command. The secondary fuel pump should operate when commanded ON.
  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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