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Home >> Chevrolet >> 2017 >> Traverse Premier, FWD >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System - Automatic >> Diagnostic Information and Procedures >> DTC B0228, B0413, B0423, B0433, B3779, or B3782: Recirculate Position Feedback Circuit, Recirculate Position Circuit, Temperature Control Feedback Circuit, Temperature Control Circuit Actuator, Air Flow Control Feedback Circuit >> Circuit/System Testing
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Circuit/System Testing

    NOTE:

    If more than one DTC is set, disconnect all affected actuators, and perform the following tests at each actuator.

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the appropriate door actuator. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 Ω between the low reference circuit terminal 8 and ground.
    • If 10 Ω or greater 
    1. Ignition OFF, disconnect the X3 and X4 harness connectors at the K33 HVAC Control Module.
    2. Test for less than 2 Ω in the low 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 K33 HVAC Control Module.
    • If less than 10 Ω 
  3. Ignition ON.
  4. Test for 4.8 - 5.2 V between the 5 V reference circuit terminal 10 and ground.
    • If less than 4.8 V 
    1. Ignition OFF, disconnect the X3 and X4 harness connectors at the K33 HVAC Control Module.
    2. Test for infinite resistance between the 5 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 5 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 K33 HVAC Control Module.
    • If greater than 5.2 V 
    1. Ignition OFF, disconnect the X3 and X4 harness connectors at the K33 HVAC Control Module, ignition ON.
    2. Test for less than 1 V between the 5 V reference circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K33 HVAC Control Module.
    • If between 4.8 - 5.2 V 
  5. Test for 4.8 - 5.2 V between the signal circuit terminal 9 and ground.
    • If less than 4.8 V 
    1. Ignition OFF, disconnect the X1 and X3 harness connectors at the K33 HVAC Control Module.
    2. Test for infinite resistance between the signal 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 signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K33 HVAC Control Module.
    • If greater than 5.2 V 
    1. Ignition OFF, disconnect the X1 and X3 harness connectors at the K33 HVAC Control Module, ignition ON.
    2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K33 HVAC Control Module.
    • If between 4.8 - 5.2 V 
  6. Ignition OFF, disconnect the X3 and X4 harness connectors at the K33 HVAC Control Module, ignition ON.
  7. Test for less than 1 V between each control circuit listed below and ground:
    • Actuator terminal 5
    • Actuator terminal 6
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • If less than 1 V 
  8. Ignition OFF.
  9. Test for infinite resistance between each control circuit listed below and ground:
    • Actuator terminal 5
    • Actuator terminal 6
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • If infinite resistance 
  10. Test for less than 2 Ω in each control circuit end to end.
    • If 2 Ω or greater 

      Repair the open/high resistance in the circuit.

    • If less than 2 Ω 
    11. NOTE:

    Before replacing an actuator, verify that there are no mechanical issues with the air control door and any associated components.

  11. Test or replace the actuator.
  12. Verify the DTC does not set or the symptom does not occur while operating the vehicle within the Conditions for Running the DTC.
    • If the DTC or symptom is not corrected 

      Replace the K33 HVAC Control Module.

    • If the DTC or symptom is corrected 
  13. All OK.
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