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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 2.7L (L3B) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P2C05-P2C10, P2C0A-P2C0F, P2C12-P2C19, or P30B0-P30B3 >> 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 P0641, P0651 is not set.
    • Go to next step: If none of the DTCs are set 
  3. Engine - Idling
  4. Verify DTC P2C06, P2C0A, P2C0E, P2C13, P2C17, P30B1 is not set.
    • If any of the DTCs are set 

      Refer to: Circuit/System Testing

    • Go to next step: If none of the DTCs are set 
  5. NOTE:

    This procedure uses generic scan tool control functions and parameter names. For detailed scan tool information, refer to: Diagnostic Aids

  6. Verify the appropriate scan tool parameter: Exhaust Camshaft Profile Actuator Position Sensor or Intake Camshaft Profile Actuator Position Sensor = 68 to 85%
    • If not in the specified range 

      Refer to: Circuit/System Testing

    • Go to next step: If in the specified range 
  7. Verify the scan tool parameter: Exhaust Camshaft Profile Actuator Position Sensor or Intake Camshaft Profile Actuator Position Sensor = The parameter value should not change.

    Perform the action while monitoring the parameter:

    • Wiggle the harness and connector: M129 Intake Camshaft Profile Actuator
    • Wiggle the harness and connector: M130 Exhaust Camshaft Profile Actuator
    • Wiggle the harness and connector: K20 Engine Control Module
    • If the parameter value changes 

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

    • Go to next step: If the parameter value does not change 
  8. 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 is not set 
  9. All OK.