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Home >> Chevrolet >> 2011 >> Impala Police >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.9L - DTC P0010 Through DTC P0340 >> DTC P0011 >> Circuit/System Testing
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Circuit/System Testing

IMPORTANT: You must complete the Circuit/System Verification before proceeding with Circuit/System Testing.
  1. Ignition OFF, disconnect the CMP actuator solenoid harness connector at the CMP actuator solenoid.
  2. Test for less than 5 ohms between the low reference circuit terminal 2 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance.
  3. Verify that a test lamp does not illuminate between the low reference circuit terminal 2 and the control circuit terminal 1.
    • If the test lamp illuminates, test the control circuit for short to voltage. If the circuit tests normal, replace the ECM.
  4. Remove the test lamp.
  5. Command the CMP Actuator Sol. ON with a scan tool. Verify the scan tool CMP Sol Ckt Short Gnd Test status is OK.
    • If not the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the ECM.
  6. Install a 3A fused jumper wire between the control circuit terminal 1 and the low reference circuit terminal 2. Command the CMP Actuator Sol. ON with a scan tool. Verify the scan tool CMP Sol Ckt Short Gnd Test status is Fault.
    • If not the specified value, test the control circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
  7. Determine that the vehicle has the correct engine oil. Refer to Service and Appearance Care in the owner's manual.
    • If the engine oil life system monitor displays the Change Oil Soon message, the engine oil is more than one year old, contains additives, or is not the correct viscosity, change the oil.
  8. Test the engine oil pressure. Refer to Oil Pressure Diagnosis and Testing .
    • If the oil pressure is low, correct the low pressure first.
  9. Inspect each CMP actuator solenoid valve assembly for the following:
    • Torn screens
    • Debris on the screens
    • Debris clogging the oil ports
    • Missing screens
    • Oil seepage at the solenoid connector pins
  10. Connect a jumper wire between the CMP actuator low reference circuit terminal 2 at the solenoid and a good ground. Connect a fused jumper wire to the CMP actuator control circuit terminal 1 at the solenoid. Point the CMP actuator towards a shop towel. Momentarily touch the fused jumper to B+. Observe the CMP actuator pintle. The pintle should immediately extend.
    • If movement is not observed, replace the CMP actuator solenoid.
  11. Inspect the engine timing components. Refer to Camshaft Timing Chain and Sprocket Cleaning and Inspection .
  12. If all circuits test normal, test or replace the CMP actuator.
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