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Home >> Buick >> 2012 >> Regal Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls/Fuel - 2.4L - DTC P0010 To DTC P0411 >> Diagnostic Information and Procedures >> DTC P0011 or P0014 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the appropriate Q6 camshaft position actuator solenoid valve.
  2. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 Ω between the low reference circuit terminal B and ground.
    • If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.
    3. NOTE:

    A test lamp must be used for this test. The control circuit is pulled-up to a low current voltage, 1.5-4.5 V on the control circuit is normal.

  3. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal A and ground.
    • If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  4. Ignition ON, command the appropriate Camshaft Position Actuator Solenoid Valve from OFF to ON with a scan tool while observing the appropriate scan tool Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status. The value should toggle between OK and Not Run in each of the commanded states.
    • If the parameter does not correspond to the specified values, test the control circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the K20 ECM.
    5. 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.

  5. Remove the Q6 camshaft position actuator solenoid valve. Verify the following conditions do not exist with the camshaft position actuator solenoid valve:
    • 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 Q6 camshaft position actuator solenoid valve.
    6. NOTE:

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

  6. Ignition OFF, swap the appropriate intake or exhaust Q6 camshaft position actuator solenoid valve with the Q6 camshaft position actuator solenoid valve that is operating correctly.
  7. Engine idling, 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 greater than the specified value, replace the mechanical camshaft position actuator on the camshaft.
  8. If all circuits/connections test normal, test the Q6 camshaft position actuator solenoid valve.
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