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Home >> Cadillac >> 2021 >> XT5 Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 823 (Transfer Case - Mp 3023/3024 (NQH) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC C11B3 or C15A9 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On/Vehicle - In Service Mode
  2. Verify no other DTCs are set.
    • Go to next step: If no other DTCs are set 
  3. Perform the scan tool configuration/reset function: Range Actuator Correlation Learn
  4. Wait 10 s before proceeding to the next step.
  5. Ignition/Vehicle - Off
  6. Wait 30 s before proceeding to the next step.
  7. Ignition - On/Vehicle - In Service Mode
  8. Verify DTC C11B3, C15A9 is not set.
    • If the DTC is set 

      Refer to: Circuit/System Testing

    • Go to next step: If the DTC is not set 
  9. Operate the component: S126 Drive Mode Select Switch - 2WD/4WD/AWD Automatic/4WD High/Locked/4WD Low

    Verify the DTC does not set.

    • If the DTC sets 

      Refer to: Circuit/System Testing

    • Go to next step: If the DTC is not set 
  10. All OK.
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