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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 506 (Automatic Transmission - 6L80/6L90 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0850-P0852 >> Circuit/System Verification

Circuit/System Verification

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  1. Verify the range selector cable is adjusted correctly. Refer to Range Selector Lever Cable Adjustment .
    • If the cable adjustment is not OK 

      Adjust, repair or replace as necessary.

    • If the cable adjustment is OK 
  2. Ignition ON.
  3. Verify the scan tool Engine Control Module Park/Neutral Position Switch parameter displays Park/Neutral when in Park or Neutral and In-Gear when in Reverse or Drive Range.
    • If Park/Neutral or In-Gear is not displayed 

      Refer to Circuit/System Testing.

    • If Park/Neutral or In-Gear is displayed 
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observe from the Freeze Frame/Failure Records data.
  5. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

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