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Home >> Cadillac >> 2021 >> CT5 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls And Fuel - 3.0L (LGY) - Diagnostic Information And Procedures (1 Of 2)) >> Diagnostic Information and Procedures >> DTC P0245, P0246, P0249, P0250, P103A, or P10BE >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC P2AB8, P2AB9, P2ABB, P2ABC, P2B81, P2B82, P2B93, P2B94, U0644, U0674 is not set.
    • Go to next step: If none of the DTCs are set 
  3. Engine - Idling - At normal operating temperature
  4. Perform the appropriate scan tool control function: Turbocharger Wastegate Position - Increase & Decrease

    Verify the scan tool parameter:

    • Turbocharger Wastegate Control Circuit High Test Status = Not Run or Okay
    • Turbocharger Wastegate Control Circuit Low Test Status = Not Run or Okay
    • Turbocharger Wastegate Control Circuit Open Test Status = Not Run or Okay
    • Turbocharger 2 Wastegate Control Circuit High Test Status = Not Run or Okay
    • Turbocharger 2 Wastegate Control Circuit Low Test Status = Not Run or Okay
    • Turbocharger 2 Wastegate Control Circuit Open Test Status = Not Run or Okay
    • If not the specified state 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified state 
  5. Perform the appropriate scan tool control function: Turbocharger Wastegate Position - Increase & Decrease

    Perform the action while monitoring the parameter:

    • Turbocharger Wastegate Control Circuit High Test Status = Not Run or Okay
    • Turbocharger Wastegate Control Circuit Low Test Status = Not Run or Okay
    • Turbocharger Wastegate Control Circuit Open Test Status = Not Run or Okay
    • Turbocharger 2 Wastegate Control Circuit High Test Status = Not Run or Okay
    • Turbocharger 2 Wastegate Control Circuit Low Test Status = Not Run or Okay
    • Turbocharger 2 Wastegate Control Circuit Open Test Status = Not Run or Okay
      • Wiggle the harness and connector: K20 Engine Control Module
      • Wiggle the harness and connector: M128 Turbocharger Wastegate Actuator
    • If not the specified state 

      Repair as necessary - Wiring / Terminal (s) / Electrical Connector (s)

    • Go to next step: If the specified state 
  6. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

    Verify the DTC does not set.

    • If the DTC sets 

      Refer to: Circuit/System Testing

    • Go to next step: If the DTC does not set 
  7. All OK.
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