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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 2.0L (LTG) - DTC P0010 To DTC P0333 >> Diagnostic Information and Procedures >> DTC P0011 or P0014: Camshaft Position System >> Circuit/System Testing

Circuit/System Testing

NOTE:

You must complete the Circuit/System Verification before proceeding with Circuit/System Testing.

  1. Ignition OFF, disconnect the harness connector at the appropriate Q6 Camshaft Position Actuator Solenoid Valve, ignition ON.
  2. Verify a test lamp illuminates between the control circuit terminal 1 or A and ground when commanding the appropriate Camshaft Position Actuator Solenoid Valve On with a scan tool.
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for less than 2Ω in the control circuit end to end.
    • If 2Ω or greater, repair the open/high resistance or short to ground in the circuit.
    • If less than 2Ω, replace the K20 Engine Control Module.
    • If the test lamp illuminates 
  3. Ignition OFF.
  4. Remove the appropriate Q6 Camshaft Position Actuator Solenoid Valve. Inspect the Camshaft Position Actuator Solenoid Valve and mounting area for the following conditions:
    • For a torn, restricted, incorrect positioned, or missing screens at the Q6 Camshaft Position Actuator Solenoid Valve
    • For engine oil leaks between the oil sealing lands of the Q6 Camshaft Position Actuator Solenoid Valve
    • For oil seepage at the Q6 Camshaft Position Actuator Solenoid Valve connector
      • If a condition is found 

        Replace the Q6 Camshaft Position Actuator Solenoid Valve.

      • If a condition is not found 
    5. NOTE:

    This step is testing the mechanical operation of the camshaft position actuator solenoid valve that set the DTC.

  5. Exchange the suspected Q6 Camshaft Position Actuator Solenoid Valve with a Q6 Camshaft Position Actuator Solenoid Valve that is operating correctly.
  6. Engine Running.
  7. Command the appropriate camshaft position actuator from 0 degrees to 20 degrees and back to zero while observing the appropriate scan tool Intake/Exhaust Camshaft Position Variance parameters. The Intake/Exhaust Camshaft Position Variance should be less than 2 degrees in each of the commanded states.
    • If the Camshaft Position Variance parameter is greater than 2 degrees 

      Replace or repair the mechanical camshaft position actuator.

    • If the Camshaft Position Variance parameter is less than 2 degrees 
  8. Test or replace the Q6 Camshaft Position Actuator Solenoid Valve.
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