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Home >> Chevrolet >> 2012 >> Traverse LS, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 303 (Power Steering System) >> Diagnostic Information and Procedures >> DTC C0450: Steering Assist Control Solenoid >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2015 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the M72 Variable Power Steering Solenoid Valve.
  2. Test for 2.5-10 Ω between the control terminals 1 and 2.
    • If not within the specified range. 

      Replace the M72 Variable Power Steering Solenoid Valve.

    • If within the specified range. 
  3. Test for infinite resistance between each terminal and the M72 Variable Power Steering Solenoid Valve housing/case.
    • If less than infinite resistance 

      Replace the M72 Variable Power Steering Solenoid Valve.

    • If infinite resistance. 
  4. Disconnect the harness connector at the K17 Electronic Brake Control Module. Ignition ON.
  5. Test for less than 1 V between the solenoid circuit terminal 1 and the K17 Electronic Brake Control Module connector terminal 15.
    • If greater than 1 V 

      Repair the short to voltage on the circuit.

    • If less than 1 V 
  6. Test for less than 1 V between the solenoid circuit terminal 2 and the K17 Electronic Brake Control Module connector terminal 44.
    • If greater than 1 V 

      Repair the short to voltage on the circuit.

    • If less than 1 V 
  7. Ignition OFF.
  8. Test for infinite resistance between the solenoid circuit terminal 1 and ground.
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • If infinite resistance 
  9. Test for infinite resistance between the solenoid circuit terminal 2 and ground.
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • If infinite resistance 
  10. Test for less than 2 Ω between solenoid circuit terminal 1 and the K17 Electronic Brake Control Module connector terminal 15.
    • If 2 Ω or greater 

      Repair the open/high resistance in the circuit

    • If less than 2 Ω 
  11. Test for less than 2 Ω between solenoid circuit terminal 2 and the K17 Electronic Brake Control Module connector terminal 44.
    • 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.

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