2026-08-12

Remove and Clean Radiator (Heat Pump) (Maintenance)

Correction code 18301200 1.56 NOTE: Unless otherwise explicitly stated in the procedure, the correction code and its associated FRT reflect all of the work required to perform this procedure, including the linked procedures. Do not stack correction codes unless explicitly told to do so. NOTE: See Flat Rate Times to learn more about FRTs and how they are created. NOTE: See Personal Protection to make sure you are wearing proper PPE when performing the procedure below. NOTE: See Ergonomic Precautions for safe and healthy working practices.

Warning
This procedure is a DRAFT. Although it has been validated, Warnings and Cautions might be missing. Follow safety requirements and use extreme caution when working on or near High Voltage systems and components.
  • 2026-08-11: Added the PROC_VC_X_RESET-RADIATOR-UA-INDEX routine.
  • 2026-04-21: Released new procedure.
  1. Open the LH front door and lower both front windows.
  2. Enable Service Mode. See Service Mode (Enable and Disable).
  3. Unlock the vehicle gateway. See Gateway (Unlock).
  4. Run the routine using Service Mode or Toolbox: PROC_VCFRONT_X_START-THERMAL-FILL-DRAINvia Service Mode:
    • Thermal ➜ Actions ➜ Start Thermal Fill/Drain
    • Thermal ➜ Coolant System ➜ Start Coolant Fill/Drain
    • Thermal ➜ Refrigerant System ➜ Start Refrigerant Fill/Drain
    via Service Mode Plus:
    • Drive Unit ➜ Front Drive Unit Replacement ➜ Start Coolant Fill/Drain
    • Drive Unit ➜ Rear Drive Unit Replacement ➜ Start Coolant Fill/Drain
    via Toolbox:(link)
  5. Raise and support the vehicle.
  6. Remove the cooling fan module. See Cooling Fan Module (Remove and Replace).
  7. Release the locking clips (x2) that attach the 12mm radiator to the cooling fan module, and then remove the 12mm radiator from the vehicle.
    Note
    Slide the 12mm radiator downwards, and then upwards to remove from the vehicle.
    Note
    Use of the following tool(s) is recommended:
    • Pliers needle nose long
  8. Use a vacuum to clean debris from both sides of the radiator.
    Note
    Do not damage fins of radiator.
  9. Use a blow gun to clean both sides of the radiator with compressed air.
    Note
    Do not damage fins of radiator.
  10. Release the locking tabs (x4) that attach the 21mm radiator to the cooling fan module, and then remove the 21mm radiator from the cooling fan module.
    Note
    Push the 21mm radiator away from the cooling fan module while releasing each locking tab.
    Note
    Use of the following tool(s) is recommended:
    • Small flat head screwdriver
  11. Use a vacuum to clean debris from both sides of the radiator.
    Note
    Do not damage fins of radiator.
  12. Use a blow gun to clean both sides of the radiator with compressed air.
    Note
    Do not damage fins of radiator.
  13. Position the 21mm radiator on the cooling fan module, and then install the locking tabs (x4) that attach the 21mm radiator to the cooling fan module.
    Note
    Align the 21mm radiator locking tabs with the cooling fan module, and then press the 21mm radiator on the cooling fan module to engage the locking tabs.
  14. Position the 12mm radiator on the vehicle, and then install the locking clips (x2) that attach the 12mm radiator to the cooling fan module.
    Note
    Ensure the 12mm radiator aligning guides (x2) and locking tabs are positioned correctly, and then push the 12mm radiator downwards to engage the locking tabs.
  15. Install the cooling fan module. See Cooling Fan Module (Remove and Replace).
    Note
    After removing the coolant bottle cap, perform the cooling system vacuum refill (See Cooling System (Vacuum Refill)), then return to the cooling fan module procedure to complete the remaining steps.
  16. Connect a laptop with Toolbox 3 to the vehicle. See Toolbox (Connect and Disconnect).
  17. Run the routine PROC_VC_X_RESET-RADIATOR-UA-INDEXvia Toolbox:(link)
    Note
    Perform this step for firmware versions develop/2026.14.3 and later.
  18. Run the routine using Service Mode or Toolbox: TEST-SELF_VCFRONT_X_THERMAL-PERFORMANCEvia Service Mode:Thermal ➜ Actions ➜ Test Thermal Performancevia Service Mode Plus:
    • Drive Inverter ➜ Front Drive Inverter Replacement ➜ Thermal System Test
    • Drive Inverter ➜ Rear Drive Inverter Replacement ➜ Thermal System Test
    • Drive Inverter ➜ Rear Left Drive Inverter Replacement ➜ Thermal System Test
    • Drive Inverter ➜ Rear Right Drive Inverter Replacement ➜ Thermal System Test
    • Drive Unit ➜ Front Drive Unit Replacement ➜ Thermal System Test
    • Drive Unit ➜ Rear Drive Unit Replacement ➜ Thermal System Test
    via Toolbox:(link)
  19. Disconnect Toolbox and remove the laptop from the vehicle.
  20. Calibrate LH and RH falcon wing doors from center display: touch Service > Calibrate Doors, then hold on Calibrate Doors until doors cycle.
  21. Turn steering wheel back to center.
  22. Exit Service Mode Plus. See Service Mode Plus.
  23. Raise both front windows and close the LH front door.
  24. Remove the vehicle from the lift.