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Home >> Cadillac >> 2010 >> STS 3.6 V, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 4.6L (LH2) - DTC P0010 To DTC P0333) >> DTC P0010, P0013, P0020, or P0023 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: You must complete the Circuit/System Verification before proceeding with Circuit/System Testing.
  1. Ignition OFF, disconnect the appropriate CMP actuator solenoid harness connector at the appropriate CMP actuator solenoid.
  2. Connect a test lamp between the control circuit terminal B and ground.
  3. Engine running, command the CMP actuator solenoid from 0-20 degrees. The test lamp should turn ON and OFF when changing between commanded states.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal replace the ECM.
    • If test lamp is always OFF, test the control circuit for a short to ground, an open/high resistance. If the circuit tests normal replace the ECM.
  4. Ignition OFF and scan tool disconnected for 90 seconds, test for less than 5 ohms between the low reference circuit terminal A and ground.
    • If greater than 5 ohms, test the low reference for an open/high resistance. If the circuit tests normal replace the ECM.
  5. If all circuits test normal, test or replace the CMP Actuator solenoid.
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