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Home >> Hummer >> 2010 >> H3 Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls And Fuel - 3.7L - DTC P0013 To DTC P0328 >> DTC P0014 >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the Camshaft Position Actuator Solenoid Valve.
  2. 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 ECM.
    3. NOTE: A test lamp must be used for this test. The control circuit is pulled-up to a low current voltage, B+ on the control circuit is normal.
  3. Ignition ON, Engine OFF, 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 ECM.
  4. Connect the DMM black lead to the control circuit terminal A. Connect the DMM red lead to B+. Set the DMM on the diode setting. Command the CMP actuator solenoid ON and OFF with a scan tool. The DMM should transition from 2.5-3.5 V when commanded OFF to less than 1 V when commanded ON.
    • If the circuit voltage 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 ECM.
  5. Remove the Camshaft Position Actuator Solenoid Valve. Inspect the Camshaft Position Actuator Solenoid Valve and mounting area for the following conditions:
    • For a torn, restricted, mis-positioned, or missing screens at the Camshaft Position Actuator Solenoid Valve
    • For engine oil leaks between the oil sealing lands of the Camshaft Position Actuator Solenoid Valve. Inspect the lands of the Camshaft Position Actuator Solenoid Valve for nicks
    • For oil seepage at the Camshaft Position Actuator Solenoid Valve connector
    • If a condition is found, replace Camshaft Position Actuator Solenoid Valve.
  6. Inspect for the following conditions:
    • If a condition is found, repair as necessary.
  7. If all circuits/components test normal, test or replace the Camshaft Position Actuator Solenoid Valve.
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