Tesla Model 3: Fuse - Cabin Heater - HV Battery (Remove and Replace)
Fuse - Cabin Heater - HV Battery- Remove

SPECIAL TOOLS
Ratchet, 1/4" Sq Dr, HV Insulated (1057602-00-A)
Ext Bar, Wobble, 1/4" Dr, HV Insulated (1057603-00-A)
Skt, 1/4" Sq Dr, 8mm, HV Insulated (1057604-00-A)
Magnet, Flexible, HV Insulated, 18" (1057607-00-A)
Asy, Service Cover, Penthouse, Model 3 (1127845-00-A)
Warning:
Only technicians who have been trained in High Voltage Awareness are
permitted to perform this procedure. 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.
Remove
- Remove the pyrotechnic battery disconnect from the penthouse. See
Pyrotechnic Battery Disconnect (Remove and Replace).

- Raise the high voltage controller, release the clips that attach the
fuse access insulator to the RH penthouse bus cover, and remove the
insulator.

- Remove and discard the nuts that attach the PTC heater fuse to the RH
penthouse bus and remove the fuse.

Fuse - Cabin Heater - HV Battery- Install
Install

- Install the PTC heater fuse to the RH penthouse bus, and then install
new nuts to attach the fuse to the bus.
Torque 2.5 Nm
Generic Measurement - Actual busbars and fasteners might appear
different
- Use the Hioki resistance meter to measure the resistance at the HV joint
between the penthouse bus and the LH side of the PTC heater fuse body .
Note: The maximum acceptable resistance is 0.105 mΩ (105 μΩ). If
the resistance is above this value, escalate a Toolbox session, as appropriate.
Generic Measurement - Actual busbars and fasteners might appear
different
- 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.
Note: The maximum acceptable resistance is 0.145 mΩ (145 μΩ). If
the resistance is above this value, escalate a Toolbox session, as appropriate.

- Install the fuse access insulator on the RH penthouse bus cover, fasten
the clips that attach the insulator to the cover, and lower the high voltage
controller.
- Install the pyrotechnic battery disconnect into the penthouse. See
Pyrotechnic Battery Disconnect (Remove and Replace).
READ NEXT:
Fuse - Power Conversion System - HV Battery-
Remove
SPECIAL TOOLS
Ratchet, 1/4" Sq Dr, HV Insulated (1057602-00-A)
Ext Bar, Wobble, 1/4" Dr, HV Insulated (1057603-00-A)
Skt, 1/4" Sq Dr, 8mm, HV Ins
SEE MORE:
Remove
Remove the LH instrument panel end cap. See
End Cap - Instrument Panel - LH (Remove and Replace).
Release the clips that attach the LH air wave end cap to the main
instrument panel decor trim, and then remove the cap from the vehicle.
Install
Installation procedure is the rev
SPECIAL TOOLS
Adapter, Coolant Reservoir Pressure Test (1130942-00-B)
Install Tool, Output Seal, Model 3 (1131206-00-A)
Remove
Remove the LH rear drive unit halfshaft. See
Halfshaft - Rear Drive Unit - LH (Remove and Replace).
Use the special tool to remove the LH output seal from the re