Shunt - HV Battery (Non-Structural Pack) (Remove and Replace)
16303602 1.20 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 LaborTimeFeedback@tesla.com. NOTE: See Personal Protection to make sure wearing proper PPE when performing the below procedure.
Only
technicians who have been trained in High Voltage Awareness and
have completed all required certification courses (if applicable) 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.
Torque Specifications
Description | Torque Value | Recommended Tools | Reuse/Replace | Notes |
---|---|---|---|---|
Bolt that attaches the shunt assembly to the ancillary bay |
|
|
Replace |
Remove
- Remove the RH 2nd row seat back. See Seat Back - 2nd Row - RH (Remove and Replace).
- Remove the LH 2nd row seat back. See Seat Back - 2nd Row - LH (Remove and Replace).
- Remove the rear underhood apron. See Underhood Apron - Rear (Remove and Replace).
- Disconnect 12V power. See 12V/LV Power (Disconnect and Connect).
- Perform the vehicle electrical isolation procedure. See Vehicle HV Disablement Procedure.
- Remove the ancillary bay cover. See Cover - Ancillary Bay (Remove and Replace).
- Remove the pyrotechnic battery disconnect. See Pyrotechnic Battery Disconnect (Remove and Replace).
- Remove the shunt insulator. See Insulator - Shunt - HV Battery (Remove and Replace).
-
Remove and discard the bolt that
attaches the shunt assembly to the ancillary bay.
Tip: Use of the following tool(s) is recommended:
- Insulated tools:
- 13 mm socket
- 2 in extension
- Insulated tools:
-
Remove the shunt from the
vehicle.
Install
- Perform a zero adjust of the Hioki resistance meter in preparation to measure resistances later in this procedure. See Resistance Meter (Zero Adjust).
-
Record the 5-digit shunt resistance as
printed at the bottom of the part number label of the new shunt, and then convert the
resistance value to hexadecimal.
NoteThe resistance is in the range of 20000 to 30000 nano Ohms. For example, "R:25819nΩ" is a resistance of 25819 nano Ohms, so record "25819".NoteSkip this step if installing the original shunt.
- Use an IPA wipe to clean the HV mating surfaces of the shunt, busbar, and the pyrotechnic battery disconnect.
-
Install the shunt to the busbar, and
then install and hand-tighten a new bolt to attach the shunt to the busbar.
- Measure the voltage across the pyrotechnic battery disconnect mount points, and then install the pyrotechnic battery disconnect. See Pyrotechnic Battery Disconnect (Remove and Replace).
-
Torque the bolt that attaches the shunt assembly to the ancillary bay.Tip: Use of the following tool(s) is recommended:
- Insulated tools:
- 13 mm socket
- 2 in extension
- Insulated tools:
- Install the shunt insulator. See Insulator - Shunt - HV Battery (Remove and Replace).
-
Use the Hioki resistance meter to
measure the resistance of the HV joint between the shunt and the adjacent busbar.
NoteThe maximum acceptable resistance is 0.045 mΩ (45 μΩ). If the resistance is above this value, escalate a Toolbox session, as appropriate.
- Install the ancillary bay cover. See Cover - Ancillary Bay (Remove and Replace).
- Install the LH 2nd row seat back. See Seat Back - 2nd Row - LH (Remove and Replace).
- Install the RH 2nd row seat back. See Seat Back - 2nd Row - RH (Remove and Replace).
- Install the 2nd row lower seat cushion. See Seat Cushion - Lower - 2nd Row (Remove and Replace).
- Connect 12V power. See 12V/LV Power (Disconnect and Connect).
- Skip step 15 through step 19 if installing the original shunt.
- Connect an LV maintainer. See LV Maintainer (Connect and Disconnect).
- Connect the laptop with Toolbox 3 to the vehicle.
-
In Toolbox, select the Actions/Autodiag tab, type
"HVP write shunt ohm" into the search field, and then click HVP write shunt ohm, type
the shunt resistance value in hexadecimal format from step 2, then click Run Network, and allow the routine to complete.
NoteIf the routine fails, repeat from step 17.
- Disconnect the laptop from the vehicle.
- Disconnect an LV maintainer. See LV Maintainer (Connect and Disconnect).
- Install the rear underhood apron. See Underhood Apron - Rear (Remove and Replace).