2026-08-12

Cooling System - Drain and Refill

Correction Code 18300100

Note
Make sure at least 14 L of the specified coolant is available before beginning this procedure.
CAUTION
Use the specified coolant only, see Fluids.

Special tools required for this procedure:

Supplier Part Number Description
Tesla 1144575-00-A Adapter, Coolant Reservoir, MS/MX (or comparable tool; specialized version not required)
Tesla 1140501-00-A Kit, Encl Leak Test, HV Battery
Note
Only the 1026636-00-A Pack Enclosure Leak Tester Assembly is used for this procedure.

Drain

Warning
If the 12V power supply is disconnected, do not attempt to open any doors with door glass in closed position. Failure to follow this instruction could result in door glass shatter.
Note
Before disconnecting the 12V power supply, ensure that the driver’s door window is fully open. Failure to follow this instruction could result in vehicle lockout.
  1. Enable Service Mode. See Service Mode.
  2. Perform the following routine using Service Mode or Toolbox (see 0005 - Service Modes): PROC_THC_X_FLUID-FILL-DRAINvia Service Mode:Thermal ➜ Actions ➜ Stop Fluid Fill/Drainvia Toolbox:(link).
  3. Disconnect 12V power. See Disconnect 12V Power .
  4. Remove the front aero shield Panel - Aero Shield - Front (1st Generation) (Remove and Replace).
    Note
    This procedure describes access of the coolant hoses from below the vehicle. Alternatively, the underhood storage unit can be removed to access the coolant hoses. See Underhood Storage Unit (Remove and Install).
  5. Lower the vehicle to a height that allows access to the chiller and the coolant reservoir.
  6. Position a suitable container to collect the drained coolant. The container should be able to hold at least 14 L.
    Note
    To reduce splashing, do not remove the cap from the coolant reservoir yet.
  7. Disconnect the LH coolant hose from the chiller.
  8. Remove the cap from the coolant reservoir.
  9. Allow the coolant to drain.
  10. Clamp the disconnected LH chiller coolant hose.
  11. Connect the Pack Enclosure Leak Tester to the Coolant Reservoir Adapter, and then install the Coolant Reservoir Adapter onto the reservoir.
  12. Make sure the outlet valve on the Pack Enclosure Leak Tester is closed (the handle is perpendicular to the valve).
  13. Connect the Pack Enclosure Leak Tester to a compressed air line.
  14. Set the pressure regulator on the Pack Enclosure Leak Tester to 5 psi (0.34 Bar).
    CAUTION
    Do not exceed 5 psi (0.34 bar) or damage to the HV battery might occur.
  15. Slowly open the outlet valve on the leak tester. When enough coolant has been removed so that the flow has been reduced to a slow drip, close the outlet valve.
  16. Remove the clamp from the LH chiller coolant hose.
  17. Clamp the RH chiller coolant hose. Do not disconnect the RH chiller coolant hose from the chiller.
  18. Slowly open the outlet valve on the leak tester. When enough coolant has been removed so that the flow has been reduced to a slow drip, close the outlet valve.
  19. Remove the clamp from the RH chiller coolant hose.
  20. Reconnect the LH chiller coolant hose.
  21. Install the front aero shield.
  22. Disconnect the Pack Enclosure Leak Tester from the Coolant Reservoir Adapter, and then remove the Coolant Reservoir Adapter from the reservoir.

Refill

Note
Make sure at least 14 L of the specified coolant is available before continuing this procedure.
CAUTION
Use the specified coolant only. In this manual, refer to Fluids.
  1. Reconnect 12V power. See Disconnect 12V Power.
  2. Refill and bleed the cooling system. See Cooling System - Partial Refill and Bleed.
    Tip
    It might be faster to refill the cooling system with the vacuum refill tool. See Cooling System - Vacuum Refill.
    Note
    Check for coolant leaks while performing the refill and bleed procedure.