2026-04-02

Coolant Heater - Electric - Battery (Remove and Replace)

Correction Code 18307302

  • 2026-04-02: Added LH/RH hood hinge cover and LH/RH wiper arm removal steps. Updated the cowl screen panel removal steps.

Removal

  1. Open LH front door and lower the LH front window.
  2. Open the hood.
  3. Release the clips (x2) that attach the LH hood hinge cover to the underhood trim components, and then remove the hinge cover from the vehicle.
  4. Release the clips (x2) that attach the RH hood hinge cover to the underhood trim components, and then remove the hinge cover from the vehicle.
  5. Remove the LH and RH wiper arms. See Wiper Arm - LH (Remove and Replace).
  6. Remove the cowl screen panel. See Panel - Cowl Screen (Remove and Replace).
  7. Remove the HEPA filter duct. See Duct - HEPA Filter (Remove and Replace).
  8. Remove the HV Battery. See HV Battery (AWD) (Remove and Install).
  9. Lower the vehicle.
  10. Lift the rear cowl for access.
  11. Disconnect the gray connector from the Forward Junction Box (FJB).
  12. Maneuver the electric coolant heater cable past the HV FDU cable towards the bottom of the vehicle.
  13. Lift the vehicle.
  14. Install a coolant clamp on the electric coolant heater to DC-DC hose.
  15. Remove the bolt and nut (torque 7 Nm) that attach the electric coolant heater to the body.
  16. Position a coolant drain container under the front of the vehicle.
  17. Remove the lower coolant hose from the electric coolant heater.
  18. Release the clips (x2) that attach the electric coolant heater cable to the bulkhead.
  19. Remove the nut (torque 7 Nm) and clip that attach the FDU HV cable to the electric coolant heater.
    Informational PurposesAn informational icon, calling your attention
    Note
    This step is not applicable for Raven vehicles.
  20. Rotate the DC-DC coolant hose clamp 90° upwards.
    Informational PurposesAn informational icon, calling your attention
    Note
    This is to obtain clearance for the battery heater, and only applies to Raven vehicles. Re-adjust the hose clamp pliers as needed.
  21. Disconnect the electric coolant heater logic connector.
  22. Release the electric coolant heater connector from the bracket.
  23. Remove the electric coolant heater bracket.
    Informational PurposesAn informational icon, calling your attention
    Note
    3x bolts (non-Raven) or 2x bolts (Raven), torque 8 Nm. Move battery heater as needed.
  24. Release the hose clamp, and then remove the electric coolant heater from the vehicle.
    Informational PurposesAn informational icon, calling your attention
    Note
    Take care not to damage the brake lines.

Installation

Installation procedure is the reverse of removal, except for the following: