Contactors - HV Battery - Pair (Remove and Replace)
Correction code
1630012122
FRT
1.14
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.NOTE:
See Ergonomic Precautionsfor safe
and healthy working practices.
- 2025-10-15: Released new procedure.
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Open all four doors
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Lower all four windows
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Move LH front seat forward
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Move RH front seat forward
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Open hood
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Remove rear underhood apron
Note14x clips
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Power off vehicle from center display
NoteVia Controls > Safety > Power Off, Select Power Off button at warning dialogue box
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Disconnect LV battery and first responder loop
Note2x connectors, Release green locking tab, Press black tab then pull black connector lock outwards to release connection, Release red lock tab on FRL, Allow 2 minutes for all electrical circuits to fully discharge
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Release 2nd row seat cushion and disconnect harness connectors
Note2x clips, 2x connectors, Press tabs backward then pull front edge up
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Verify operation of multimeter
NoteSet multimeter to DC voltage, Confirm multimeter is properly measuring voltage by testing the 16v battery
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Remove all items from pockets and ensure not wearing metal items
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Inspect HV insulating gloves
NoteCheck gloves for damage prior to use, Refer to service document TN-15-92-003, for information on inspecting HV gloves. https://service.teslamotors.com/documents?model=&keys=TN-15-92-003&vehicle_system=&sort_by=field_date_submitted&sort_order=DESC
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Put on HV insulating gloves and leather over gloves
NoteMake sure to wear electrical protective gloves any time Hioki tester is used
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Remove bolts securing ancillary bay probe lid cover from ancillary bay cover
Note2x bolts, EP10 5-Lobe, 6 Nm, Discard after removal
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Remove ancillary bay probe lid cover from ancillary bay cover
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Verify no high voltage
NoteMake sure to wear PPE (HV gloves, safety glasses) when working on high voltage component, Measure B+ to Ground, B- to Ground, B+ to B-, If voltage is greater than 10V, Pack contactors are not open or welded, Stop work and reach out to Service Engineering
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Inspect ancillary bay probe lid cover gasket then position onto ancillary bay cover
NoteConfirm no visual damage present, Wipe ancillary bay with IPA to clean surface, Allow to 1 minute dry time
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Install bolts securing ancillary bay probe lid cover to ancillary bay cover
Note2x bolts, EP10 5-Lobe, 6 Nm, Install new bolts
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Remove HV insulating gloves
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Disconnect HVC logic connector and install logic cap
Note1x connector, 1x cap, Release locking tab then push the handle downward to release connector
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Remove bolts securing ancillary bay cover to HVC
Note3x bolts, E10, 5 Nm + 30 degrees
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Remove bolts securing ancillary bay cover to HV battery
Note18x bolts, E10 5-Lobe, 8 Nm, Use E10 5-Lobe socket without magnet, The fasteners are captive and will stay attached to the ancillary bay cover
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Inspect HV insulating gloves
NoteCheck gloves for damage prior to use, Refer to service document TN-15-92-003 R1, for information on inspecting HV gloves. https://service.teslamotors.com/protected-doc/ServiceBulletins/External/TN/TN-15-92-003_High_Voltage_Awareness_Care_Points_R4.pdf
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Put on HV insulating gloves and leather over gloves
NoteMake sure to wear electrical protective gloves any time Hioki tester is used
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Remove HVC logic cap
Note1x cap
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Remove ancillary bay cover from HV battery
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Install HVC logic cap
Note1x cap
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Inspect ancillary bay for any missing insulators
NoteInstall service insulator kit before continuing to next step, The number of bolts on newer vehicles may vary
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Remove bolts securing pyro disconnect to ancillary bay
Note1x insulator, patch bolts, 13mm, 9 Nm, Discard after removal
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Remove pyro disconnect from ancillary bay
Note1x connector from the bottom, Lift pyro disconnect straight up and out of the ancillary bay
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Install pyro disconnect dummy
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Lift HV Controller up to gain access to fuse insulator
NoteSetup seatbelt to hold HVC assembly and tray in upward postition
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Disconnect PCS to DC bus HV connector
Note1x connector, Release locking tab then disconnect
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Disconnect PCS logic connector from PCS
Note1x connector
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Disconnect PCS LV connector from PCS
Note1x connector, Release the locking tab by pulling upward, May need plastic trim tool to help lift the connector upward
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Disconnect ancillary bay harness connectors from positive pack contactor
Note2x connectors
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Remove HV PCS to DC Bus harness clip from positive pack contactor
Note1x clip
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Remove HV joint insulators from positive HV switch
Note2x insulators
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Remove bolt securing positive pack contactor to positive busbar
Note1x patch bolt, 13mm, 9 Nm, Discard after removal
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Remove nut securing positive pack contactor to module 4 rear terminal
Note1x patch nut, 13mm, 9 Nm, Discard after removal
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Remove nuts securing positive pack contactor to ancillary bay
Note3x nuts, 10mm, 8 Nm, Use insulated magnet to retrieve the nuts after removal, The number of nuts on newer vehicles may vary
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Remove positive pack contactor from ancillary bay
Note2x guide pins
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Position positive pack contactor to ancillary bay for installation
Note2x guide pins
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Install nuts securing positive pack contactor to ancillary bay
Note3x nuts, 10mm, 8 Nm, Use insulated magnet as needed to position nuts onto studs, The number of nuts on newer vehicles may vary
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Install bolt securing positive pack contactor to positive busbar
Note1x patch bolt, 13mm. 9 Nm, Install new patch bolt, Mark after torque
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Install nut securing positive pack contactor to HV battery tall terminal to module 4 rear terminal
Note1x patch nut, 13mm, 9 Nm, Install new patch nut, Mark after torque
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Measure resistance from HV joint between HV battery positive contactor and center of HV battery positive terminal
Note1x HV joint, 110μΩ or less
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Perform Hioki impedance test at HV joint of positive pack contactor to DC link busbar
Note1x HV joint, The acceptable resistance is between 0.020 mΩ (20 μΩ) and 0.060 mΩ (60 μΩ), If the resistance is greater than 0.060 mΩ (60 μΩ), stop work and escalate a Toolbox session. If the resistance is less than 0.020 mΩ (20 μΩ), reposition the probes and measure again.
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Install ancillary bay harness clip to positive pack contactor
Note1x clip
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Connect ancillary bay harness connectors to positive pack contactor
Note2x connectors
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Connect PCS LV connector to PCS
Note1x connector, Push connector downward then push the locking tab downward to install connector, Make sure the connector is fully seated
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Connect PCS logic connector to PCS
Note1x connector
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Connect PCS to DC bus HV connector
Note1x connector, Connect then secure locking tab
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Lower HV Controller back into place
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Remove harness clip from FC contactor cover
Note1x clip
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Disconnect ancillary bay harness connectors from negative pack contactor
Note2x connectors
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Remove HV joint insulators from negative pack contactor
Note2x insulators
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Remove bolt securing negative pack contactor to DC link busbar joint
Note1x patch bolt, 13mm, 9 Nm, Discard after removal
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Remove nut securing negative pack contactor to HV battery tall silicon terminal
Note1x patch nut, 13mm, 9 Nm, Discard after removal
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Remove nuts securing negative pack contactor to penthouse
Note3x nuts, 10mm, 8 Nm, Use insulated magnet to retrieve the nuts after removal, The number of nuts on newer vehicles may vary
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Remove negative pack contactor from penthouse
Note2x guide pins
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Position negative pack contactor to penthouse for installation
NoteAlign the 2x guide pins
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Install nuts securing negative pack contactor to penthouse
Note3x nuts, 10mm, 8 Nm, Use insulated magnet as needed to position nuts onto studs, The number of nuts on newer vehicles may vary, Mark after torque
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Install bolt securing negative pack contactor to DC link busbar joint
Note1x patch bolt, 13mm, 9 Nm, Install new patch bolt, Mark after torque
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Install nut securing negative pack contactor to HV battery tall terminal
Note1x patch nut, 13mm, 9 Nm, Install new patch nut, Mark after torque
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Perform Hioki impedance test at HV joint of negative pack contactor to negative DC link busbar
Note1x HV joint, The acceptable resistance is between 0.020 mΩ (20 μΩ) and 0.060 mΩ (60 μΩ), If the resistance is greater than 0.060 mΩ (60 μΩ), stop work and escalate a Toolbox session. If the resistance is less than 0.020 mΩ (20 μΩ), reposition the probes and measure again.
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Perform Hioki impedance test at negative pack contactor to module 1 rear terminal
Note1x HV joint, 110μΩ or less
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Install HV joint insulators to negative pack contactor
Note2x insulators
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Connect ancillary bay harness connectors to negative pack contactor
Note2x connectors
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Install ancillary bay harness clip around negative pack contactor area
Note1x clip
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Remove pyro disconnect dummy
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Clean mating surfaces
NoteAllow to 1 minute dry time,Use an IPA wipe to clean the HV mating surfaces of the shunt, busbar, and the pyrotechnic battery disconnect
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Set multimeter to "LoZ" (low impedance) mode
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Measure voltage between busbar and shunt
NoteWhile still measuring the voltage, have an assistant position the pyrotechnic battery disconnect into the HV battery for installation. Make sure to align the pins of the connector with the new pyrotechnic battery disconnect, and then press the pyrotechnic battery disconnect down onto the busbars
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Position pyro disconnect to ancillary bay for installation
Note1x connector, Make sure to align the 2 pins with pyro disconnect, The pyro disconnect can only be installed one way
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Install bolts securing pyro disconnect to ancillary bay
Note2x patch bolts, 13mm, 9 Nm
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Measure resistance from module 2 busbar to pyro disconnect
Note1x HV joint, 60μΩ or less, Perform zero adjust to Hioki meter prior to testing
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Measure resistance from pyro disconnect to shunt
Note1x HV joint, 45μΩ or less, Perform zero adjust to Hioki meter prior to testing
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Remove service insulator kit
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Inspect ancillary bay walls for damage
NoteAny dent or depression in the seal that causes it to not be flat will result in a leak, and cannot be reused, Any paint that comes off the ancillary bay wall, whether or not it sticks to the seal, will require enclosure leak test when reassembled, It can still be reused
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Inspect ancillary bay cover seal to confirm it has no visual damage
NoteImage up close for clarity, Delaminated and torn seals cannot be reused
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Wipe ancillary bay cover with IPA to clean surface
NoteAllow to 1 minute dry time
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Position ancillary bay cover to HV battery for installation
NoteEnsure all accessible insulators are present, wearing Electrical Protective Gloves is not necessary once all HV components are covered.
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Remove HV insulating gloves
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Install bolts securing ancillary bay cover to HV battery
Note18x bolts, E10 5-Lobe, 8 Nm, Use E10 5-Lobe socket without magnet, Fasteners are captive, Follow torque sequence per image
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Install bolts securing ancillary bay cover to HVC
Note3x bolts, E10, 5 Nm + 30 degrees
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Remove logic cap and connect HVC logic connector
Note1x connector, 1x cap, Align connector then pull the handle to locking position get connector fully seated
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Connect 2nd row seat harness and secure cushion
Note2x clips, 2x connectors, Insert buckles through holes, Slide rear inward then align front clips, Perform push-pull-push test
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Connect first responder loop and LV battery
Note2x connectors, Secure FRL first, Seat LV battery connection and push black connector lock inwards to secure, Engage green locking tab when fully seated
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Install rear underhood apron
Note14x clips, Hold rear wall of frunk to keep from flexing while engaging front clips
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Close hood
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Move RH front seat to original position
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Move LH front seat to original position
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Raise all four windows
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Close all four doors