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Home >> Chevrolet >> 2008 >> Corvette Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Steering >> Power Steering System >> Diagnostic Information and Procedures >> DTC C0450 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the VES actuator harness connector.
  2. Measure for 0 volts between the variable effort steering actuator supply voltage circuit terminal A and ground.
    • If the voltage is greater than the specified range, test the variable effort steering actuator supply voltage circuit for short to voltage. If the circuit tests normal, replace the EBCM.
  3. Ignition ON, measure for 12 volts between the variable effort steering actuator supply voltage circuit terminal A and ground.
    • If the voltage is less than the specified range, test the variable effort steering actuator supply voltage circuit for short to ground or open/high resistance. If the circuit tests normal, replace the EBCM.
  4. Connect a test lamp between the variable effort steering actuator supply voltage circuit terminal A and the variable effort steering actuator control circuit terminal B at the VES actuator harness connector.
  5. Using a scan tool, command the VES actuator ON. Verify the test lamp illuminates.
    • If the test lamp does not illuminate, test the variable effort steering actuator control circuit for open/high resistance. If the circuit tests normal, replace the EBCM.
  6. If all circuits test normal, test or replace the VES actuator.
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