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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1987 (Engine Controls And Fuel - 3.6L (LCS) - DTC P0008 To DTC P0193) >> DTC P000A-P000D, P0011, P0014, P0021, or P0024 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, open the hood to disable the Auto-Stop function.
  2. Ignition ON, verify the scan tool hood position parameter displays Open.
    • If the hood position does not display Open, refer to DTC P254F .
  3. Ignition OFF, disconnect the harness connector at the appropriate camshaft position (CMP) actuator solenoid.
  4. Ignition ON, load test for B+ between the ignition voltage circuit terminal 1 and ground.
    • If less than the specified range, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all the components connected to the ignition circuit and replace as necessary.
    5. NOTE: Use the J 35616-200  Test Lamp Kit for this test. See Special Tools . If the J 35616-200  is not available, use a test lamp that measures greater than 20 Ω. See Special Tools .
  5. Connect a test lamp between the control circuit terminal 2 and B+.
  6. Command the appropriate CMP actuator solenoid ON with a scan tool.
    7. NOTE: The voltage must be measured at the control side of the circuit.
  7. Load test for less than 1 V between the control circuit terminal 2 and the ECM housing.
    • If greater than the specified range, test the control circuit for an open/high resistance. If the circuit/connections test normal, replace the ECM.
  8. Remove the CMP actuator solenoid. Inspect the CMP actuator solenoid and mounting area for the following conditions:
    • For a torn, restricted, mis-positioned, or missing screens at the CMP actuator solenoid
    • For engine oil leaks between the oil sealing lands of the CMP actuator solenoid-Inspect the lands of the CMP actuator solenoid for nicks.
    • For oil seepage at the CMP actuator solenoid connector
    • If a condition is found, replace CMP actuator solenoid.
  9. Ignition OFF, swap the suspected CMP actuator solenoid with a CMP actuator solenoid that is operating correctly.
    10. NOTE: This step is testing the mechanical CMP actuator for the camshaft that set the DTC.
  10. Engine idling. Command the appropriate camshaft actuator from 0 degrees to 40 degrees and back to zero while observing the appropriate scan tool CMP Angle Variance parameters. The CMP Angle Variance should be less than 2 degrees in each of the commanded states.
    • If greater than the specified range, replace the camshaft position (CMP) actuator.
  11. If all circuits/connections test normal, test or replace the CMP actuator solenoid.
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