2025-09-25

Fuse - Cabin Heater - HV Battery (Battery On Table) (Install)

Correction code 16304026 0.10 NOTE: Unless otherwise explicitly stated in the procedure, the above correction code and 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. To provide feedback on FRT values, email ServiceManualFeedback@tesla.com. NOTE: See Personal Protection to make sure wearing proper PPE when performing the below procedure. See Ergonomic Precautions for safe and healthy working practices.

Informational PurposesAn informational icon, calling your attention
Note
This procedure is to be performed if the HV battery is outside of the vehicle on the battery table, with the ancillary bay cover and pyrotechnic battery disconnect removed. Add this correction code as a separate activity.
  • 1057602-00-A Ratchet, 1/4" Sq Dr, HV Insulated
  • 1057603-00-A Ext Bar, Wobble, 1/4" Dr, HV Insulated
  • 1057604-00-A Skt, 1/4" Sq Dr, 8mm, HV Insulated
  • 1057607-00-A Magnet, Flexible, HV Insulated, 18"
  • 1127845-00-A Asy, Service Cover, Penthouse, Model 3
  • 1076927-00-A Resistance meter, microohm, Hioki RM 3548
Warning IconA warning icon, calling your attention to a possibly risky situation
Warning

Only technicians who have completed all required certification courses are permitted to perform this procedure. Tesla recommends third party service provider technicians undergo equivalent training before performing this procedure. For more information on Tesla Technician requirements, or descriptions of the subject matter for third parties, see HV Certification Requirements. Proper personal protective equipment (PPE) and insulating HV gloves with a minimum rating of class 0 (1000V) must be worn at all times a high voltage cable, busbar, or fitting is handled. Refer to Tech Note TN-15-92-003, High Voltage Awareness Care Points for additional safety information.

Install

  1. Perform a zero adjust of the Hioki resistance meter in preparation to measure resistances later in this procedure. See Resistance Meter (Zero Adjust).
  2. Remove the pyrotechnic battery disconnect. See Pyrotechnic Battery Disconnect (Remove and Replace).
  3. Raise the high voltage controller, release the clips that attach the fuse access insulator to the RH ancillary bay bus cover, and remove the insulator.
  4. Install the PTC heater fuse to the RH ancillary bay bus, and then install new nuts to attach the fuse to the bus.
    4.5 Nm (3.3 lbs-ft)
  5. Use the Hioki resistance meter to measure the resistance at the HV joint between the ancillary bay bus and the LH side of the PTC heater fuse body .
    Informational PurposesAn informational icon, calling your attention
    Note
    The maximum acceptable resistance is 0.105 mΩ (105 μΩ). There is too much resistance in the High Voltage joint. Remove the fastener, clean areas with isopropyl alcohol, install fastener back and test again
    Figure 1. Generic Measurement - Actual busbars and fasteners might appear different
  6. Use the Hioki resistance meter to measure the resistance at the HV joint between the RH side of the PTC heater fuse and the respective ring terminal plating.
    Informational PurposesAn informational icon, calling your attention
    Note
    The maximum acceptable resistance is 0.145 mΩ (145 μΩ). There is too much resistance in the High Voltage joint. Remove the fastener, clean areas with isopropyl alcohol, install fastener back and test again
    Figure 2. Generic Measurement - Actual busbars and fasteners might appear different
  7. Install the fuse access insulator on the RH ancillary bay bus cover, fasten the clips that attach the insulator to the cover, and lower the high voltage controller.
  8. Measure the voltage across the pyrotechnic battery disconnect mount points, and then install the pyrotechnic battery disconnect. See Pyrotechnic Battery Disconnect (Remove and Replace).
  9. Return to the procedure that requested installation of the cabin heater fuse.