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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System - Manual >> Diagnostic Information and Procedures >> DTC B0223, B0233, B023A or B0408: Recirculate Position Command/Air Flow Control/Main Temperature Control >> Circuit/System Testing >> B0223, B0233 or B0408

B0223, B0233 or B0408

  1. Ignition OFF, disconnect the harness connector at the appropriate door actuator and disconnect the harness connectors at the K33 HVAC Control Module, ignition ON.
  2. Verify a test lamp illuminates between the B+ circuit terminal 2 and ground.
    • If the test lamp does not illuminate 
    1. Disconnect the X3 harness connector at the K33 HVAC Control Module.
    2. Test for infinite resistance between the B+ 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 B+ 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 the test lamp illuminates 
  3. Test for less than 1 V between ground and the control circuits listed below:
    • Control Circuit - terminal 1
    • Control Circuit - terminal 3
    • Control Circuit - terminal 4
    • Control Circuit - terminal 6
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • If less than 1 V 
  4. Ignition OFF.
  5. Test for infinite resistance between ground and the control circuits listed below:
    • Control Circuit - terminal 1
    • Control Circuit - terminal 3
    • Control Circuit - terminal 4
    • Control Circuit - terminal 6
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • If infinite resistance 
  6. Disconnect the X3 harness connector at the K33 HVAC Control Module.
  7. Test for less than 2 Ω end to end in the circuits listed below:
    • Control Circuit - terminal 1
    • Control Circuit - terminal 3
    • Control Circuit - terminal 4
    • Control Circuit - terminal 6
    • B+ Circuit - terminal 2
    • If 2 Ω or greater 

      Repair the open/high resistance in the circuit.

    • If less than 2 Ω 
  8. Test or replace the actuator.
    NOTE: Before replacing an actuator, verify that there are no mechanical issues with the air control door and any associated components.
  9. Verify the symptom or DTC was corrected.
    • If the symptom or DTC was not corrected 

      Replace the K33 HVAC Control Module.

    • If the symptom or DTC was corrected 
  10. All OK.
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