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Home >> Cadillac >> 2017 >> XTS Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls And Fuel - 3.6L (LFX LF3) - DTC P050D To DTC P2635 And Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P05CC-P05CF: Cold Start Intake Camshaft Position System Performance Bank >> Circuit/System Testing
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Circuit/System Testing

    NOTE:

    If debris is found on CMP screens, clean the screens and reinspect for damage. If the screens are not damaged, reinstall in the engine.

  1. Remove the Q6 Camshaft Position Actuator Solenoid Valve and verify the following conditions do not exist:
    • Torn, mis-positioned, or missing screens at the CMP actuator solenoid
    • Engine oil leak between the oil sealing lands of the CMP actuator solenoid - Inspect the lands of the CMP actuator solenoid for nicks.
    • Oil seepage at the CMP actuator solenoid connector
    • If a condition is found 

      Replace the Q6 Camshaft Position Actuator Solenoid Valve.

    • If no condition is found 
    2. NOTE:

    After swapping the solenoids, install jumper wires to the appropriate terminals of the harness connectors and the solenoids.

  2. Ignition Off, swap the intake or exhaust Q6 Camshaft Position Actuator Solenoid Valve with the Q6 Camshaft Position Actuator Solenoid Valve that is operating correctly.
  3. Engine idling.
  4. Verify the scan tool Camshaft Position Variance parameter is less than 2° in each of the commanded states when commanding the Camshaft Position Actuator from 0° to maximum range and back to 0° with a scan tool.
    • If 2° or greater 

      Replace the mechanical camshaft position actuator.

    • If less than 2° 
  5. Test or replace the Q6 Camshaft Position Actuator Solenoid Valve.
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