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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 370 (Engine Controls And Fuel - Hybrid (LZ1) - DTC P0010 Through DTC P0341) >> Diagnostic Information and Procedures >> DTC P0010 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the Camshaft Position Sensor and Actuator Magnet jumper harness connector. Refer to INLINE HARNESS CONNECTOR END VIEWS - INDEX
    2. NOTE:

    Testing for steps 2-4 is performed on the ECM side of the jumper harness connector.

  2. Ignition OFF for 2 minutes and scan tool powered OFF, test for less than 5 Ω between the low reference circuit terminal E 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. A voltage on the control circuit is normal.

  3. Ignition ON, engine OFF, verify that a test lamp does not illuminate between the control circuit terminal D 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 D. 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 greater than 2 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. NOTE:

    Testing for steps 5 and 6 is performed on the engine side of the jumper harness connector.

  5. Ignition OFF, test for infinite resistance between the control circuit terminal D and ground.
    • If not the specified value, repair the control circuit for a short to ground.
  6. Test for 5.0-9.0 Ω between the control circuit terminal D and the low reference circuit terminal E.
    • If less than the specified range, test for a short between the control circuit and the low reference circuit. If the circuits/connections test normal, test or replace the Camshaft Position Actuator Magnet.
    • If greater than the specified range, test the control circuit and the low reference for an open/high resistance. If the circuits/connections test normal, test or replace the Camshaft Position Actuator Magnet.
  7. If all circuits test normal, repair the poor connection at the camshaft position sensor jumper wire harness.
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