2026-09-08

Intercambiador de calor - Unidad de tracción trasera (4DU) (desinstalación y sustitución)

Código de corrección 40305232 0.66 NOTA: Salvo que se indique lo contrario explícitamente en el procedimiento, el código de corrección y el FRT asociado reflejan todo el trabajo necesario para realizar este procedimiento, incluidos los procedimientos vinculados. No acumule códigos de corrección a menos que se le indique explícitamente que lo haga. NOTA: Consulte Tiempos de tarifa plana (FRT) para obtener más información sobre los FRT y cómo se crean. NOTA: Consulte Protección personal para asegurarse de llevar el EPI adecuado al realizar el siguiente procedimiento. NOTA: Consulte Precauciones ergonómicas para ver prácticas de trabajo seguras.

  • 2026-09-01: Removed steps to disconnect/connect the LV power and added oil pump low pressure test routine.
  • 2024-01-10: Corrected spellings of "exchanger".
Aviso
Este procedimiento están en fase PRELIMINAR. Aunque se ha validado, es posible que falten advertencias y precauciones. Siga los requisitos de seguridad y tenga mucho cuidado cuando trabaje en sistemas y componentes de alta tensión o cerca de ellos.

Retirar

  1. Move the vehicle to a 2 post lift. See Elevación del vehículo - Elevador de 2 columnas.
  2. Open the LH front door and raise the LH front window.
  3. Enable Service Mode on the touchscreen. See Modo de servicio.
  4. Unlock the vehicle gateway. See Puerta de enlace (Desbloquear).
  5. Access the thermal system routines on the touchscreen: Touch Quick Controls > Service Mode > Diagnostics > Thermal.
    Nota
    Authorize routines by holding the turn signal stalk full up (right hand turn) while applying brake with the key in the vehicle.
  6. Touch Start Thermal Fill Drain (Coolant Only) on the touchscreen.
    Nota
    Touch the X at the top left of window to close once completed.
    Nota
    Verify the indicator displays green and the vehicle is ready for the coolant fill/drain.
    Nota
    Thermal "Fill Drain" routine has a 5 hour time limit. After 5 hours, the routine must be performed again.
  7. Remove the rear underhood apron. See Faldón del vano del motor - Parte trasera (Desinstalación y sustitución).
  8. Remove the cabin intake duct. See Conducto - Superior - Entrada de la cabina (Desinstalación y sustitución).
  9. Remove the rear aero shield panel. See Panel - Deflector aerodinámico - Trasero (Desinstalación y sustitución).
  10. Drain the gearbox fluid from the rear drive unit. See Líquido de la caja de cambios - Unidad de tracción trasera (4DU) (vaciado y llenado).
  11. Position the coolant drain collector underneath the RH rear of the HV battery.
  12. Release the clip that attaches the rear drive unit inverter to heat exchanger hose to the rear drive unit heat exchanger.
  13. Release the clip, disconnect the rear drive unit inverter to heat exchanger hose from the rear drive unit heat exchanger, immediately plug the heat exchanger fitting, allow the hose to drain, and then plug the hose fitting.
  14. Release the clip that attaches the rear drive unit outlet hose to the rear drive unit heat exchanger.
  15. Release the clip, disconnect the rear drive unit outlet hose from the rear drive unit heat exchanger, and then immediately plug both fittings.
    Nota
    Coolant loss greater than 1 L will require a vacuum fill.
  16. Remove the bolts (x2) that attach the rear drive unit heat exchanger to the rear drive unit, and then remove the heat exchanger from the drive unit.
    Nota
    Use of the following tool(s) is recommended:
    • 4 in extension
    • External Torx Plus EP10
    • Ratchet/torque wrench
    Nota
    Confirm that the O-rings (x2) are not stuck in the rear drive unit.

Instalar

  1. Apply a light coat of KAF1 oil to the O-rings of the heat exchanger, and then wipe away any excess oil.
  2. Install the rear drive unit heat exchanger onto the rear drive unit, and then install the bolts (x2) that attach the heat exchanger to the drive unit.
    5 Nm (3.7 lbs-ft) +30 deg
  3. Remove the plugs from the fittings, immediately connect the rear drive unit outlet hose to the rear drive unit heat exchanger, fasten the clip, and then perform a Push-Pull-Push check of the fitting.
  4. Fasten the clip that attaches the rear drive unit outlet hose to the rear drive unit heat exchanger.
  5. Remove the plugs from the fittings, immediately connect the rear drive unit inverter to heat exchanger hose to the rear drive unit heat exchanger, fasten the clip, and then perform a Push-Pull-Push check of the fitting.
  6. Fasten the clip that attaches the rear drive unit inverter to heat exchanger hose to the rear drive unit heat exchanger.
  7. Remove the coolant drain collector from under the vehicle.
  8. Refill the rear drive unit with gearbox fluid. See Líquido de la caja de cambios - Unidad de tracción trasera (4DU) (vaciado y llenado).
  9. Install the mid aero shield panel. See Panel - Deflector aerodinámico - Trasero (Desinstalación y sustitución).
  10. Lower the vehicle fully.
  11. Connect a laptop with Toolbox to the vehicle. SeeToolbox (Conexión y desconexión).
  12. Perform the routine: TEST-SELF_DIR_X_OIL-PUMP-PRESSUREvia Toolbox:(link)
  13. Disconnect the laptop from the vehicle. SeeToolbox (Conexión y desconexión).
  14. Remove the cap from the coolant bottle.
    Nota
    Perform this step only for heat pump vehicles.
  15. Inspect the coolant level and add coolant as necessary to bring the fluid level to the Max line.
    Nota
    If greater than 1 L of coolant was lost during repair, a vacuum fill is required.
  16. On the vehicle touchscreen, go to Service Mode > Thermal > Stop Thermal Fill/Drain, touch Run and allow the routine to complete.
  17. On the vehicle touchscreen, go to Thermal > Coolant System > Coolant Purge Start, touch Run and wait for the routine to complete (10 minutes).
  18. Add coolant to the reservoir as necessary, and install the reservoir cap.
  19. Install the cabin intake duct. See Conducto - Superior - Entrada de la cabina (Desinstalación y sustitución).
  20. Install the rear underhood apron. See Faldón del vano del motor - Parte trasera (Desinstalación y sustitución).
  21. Disable Service Mode. See Modo de servicio.
  22. Raise the LH front window and close the LH front door.
  23. Remove the vehicle from the 2 post lift. See Elevación del vehículo - Elevador de 2 columnas.