LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2008 >> Lucerne CX >> Repair and Diagnosis >> Steering >> Power Steering System >> Diagnostic Information and Procedures >> DTC C0450 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the VES actuator.
  2. Connect a test lamp between the high control circuit terminal A and ground.
  3. Cycle the ignition ON and verify the test lamp turns ON then OFF.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the EBCM.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
  4. Connect a test lamp between the control circuit terminals A and B.
  5. Cycle the ignition ON and verify the test lamp turns ON then OFF.
    • If the test lamp is always OFF, test the control circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.
  6. Ignition OFF, test for infinite resistance between the low control circuit terminal B and ground.
    • If not the specified value, test the control circuit for a short to ground.
  7. If all circuits test normal, test or replace the VES actuator.
scientia non olet · About LEMON Manuals