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Home >> Cadillac >> 2013 >> CTS Base, 2D Coupe, AWD >> 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 Variable Effort Steering Actuator.
  2. Measure for 2.5-10 Ω between the Variable Effort Steering Actuator terminal 1 and 2.
    • If not within the specified range 

      Replace the Variable Effort Steering Actuator.

    • If within the specified range 
  3. Test for infinite resistance between each of the Variable Effort Steering Actuator terminals listed below and the Variable Effort Steering Actuator housing.
    • terminal 1
    • terminal 2
    • If less than infinite resistance 

      Replace the Variable Effort Steering Actuator.

    • If infinite resistance 
    4. NOTE:

    In order to ensure correct test results, the J-35616 test lamp must be used to perform the following steps. Failure to use the J-35616 test lamp may result in inaccurate test results and potential misdiagnosis.

  4. Ignition ON, engine running.
  5. Verify that a test lamp illuminates between the 12 V reference circuit terminal 1 and ground.
    • If the test lamp does not illuminate 
    1. Ignition OFF, remove the test lamp.
    2. Test for infinite resistance between the 12 V reference circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the 12 V reference circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K17 Electronic Brake Control Module.
    • If the test lamp illuminates 
  6. Ignition OFF, connect the test lamp between the 12 V reference circuit terminal 1 and the control circuit terminal 2. Ignition ON, engine running.
  7. Verify the test lamp briefly illuminates for approximately 1 second, then turns OFF.
    • If the test lamp is always ON 
    1. Ignition OFF, remove the test lamp.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K17 Electronic Brake Control Module.
    • If the test lamp is always OFF 
    1. Ignition OFF, remove the test lamp disconnect the harness connector at the K17 Electronic Brake Control Module, ignition ON.
    2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K17 Electronic Brake Control Module.
    • If the test lamp illuminates for approximately 1 second 
  8. All OK.
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