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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 165 (Engine Controls And Fuel - 2.7L (L3B) - Diagnostic Information And Procedures (1 Of 3)) >> Diagnostic Information and Procedures >> DTC P003C, P003D, P005A, P037C, P03EF, P03F0, P03F4, P2B4F, P2B51, P2B53, P3083, P3084, P3088, P3089, P308D, P308E, P3092, P3093, P3097, P3098, or P309C >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Engine - Idling
  2. Verify there are no DTCs set related to the following component/system:
    • B338 Intake Camshaft Profile Sleeve Position Sensor
    • B339 Exhaust Camshaft Profile Sleeve Position Sensor
    • {Circuit DTCs} M129 Intake Camshaft Profile Actuator
    • {Circuit DTCs} M130 Exhaust Camshaft Profile Actuator
    • Go to next step: If a related DTC is not set 
  3. Verify there is no abnormal noise from the component: Engine
    • Go to next step: If no abnormal noise is present 
    4. NOTE:

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

  4. Verify the appropriate scan tool parameter:
    • Exhaust Camshaft Profile Actuator Control Circuit Test Status = Not Run or Okay
    • Exhaust Camshaft Profile Actuator Control Circuit High Test Status = Not Run or Okay
    • Exhaust Camshaft Profile Actuator Control Circuit Low Test Status = Not Run or Okay
    • Intake Camshaft Profile Actuator Control Circuit Test Status = Not Run or Okay
    • Intake Camshaft Profile Actuator Control Circuit High Test Status = Not Run or Okay
    • Intake Camshaft Profile Actuator Control Circuit Low Test Status = Not Run or Okay
    • Go to next step: If the specified state 
  5. Verify the appropriate scan tool parameter: Exhaust Camshaft Profile Actuator Position Sensor or Intake Camshaft Profile Actuator Position Sensor = Greater than 68%
    • If 68% or less 
    1. Ignition/Vehicle - Off
      2. NOTE:

      For component location, refer to: Diagnostic Aids

    2. Remove the component: M129 Intake Camshaft Profile Actuator or M130 Exhaust Camshaft Profile Actuator
    3. Verify a condition does not exist with the component: Actuator Pin @ M129 Intake Camshaft Profile Actuator or M130 Exhaust Camshaft Profile Actuator - Missing/Visible Damage
      • If a condition exists - Replace the component: M129 Intake Camshaft Profile Actuator or M130 Exhaust Camshaft Profile Actuator & Inspect the following components for damage and repair or replace as necessary:
      • Camshaft
      • Camshaft profile control sleeve
      • If no condition exists - Replace the component: M129 Intake Camshaft Profile Actuator or M130 Exhaust Camshaft Profile Actuator
    • Go to next step: If greater than 68% 
  6. Ignition - On / Vehicle - In Service Mode
  7. Verify the scan tool parameter:
    • Exhaust Camshaft Profile Actuator Control Circuit Test Status = Not Run or Okay
    • Exhaust Camshaft Profile Actuator Control Circuit High Test Status = Not Run or Okay
    • Exhaust Camshaft Profile Actuator Control Circuit Low Test Status = Not Run or Okay
    • Intake Camshaft Profile Actuator Control Circuit Test Status = Not Run or Okay
    • Intake Camshaft Profile Actuator Control Circuit High Test Status = Not Run or Okay
    • Intake Camshaft Profile Actuator Control Circuit Low Test Status = Not Run or Okay
    • 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 not the specified state 

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

    • Go to next step: If the specified state 
  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 

      Repeat the procedure starting at step 1

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