AC Junction Box (Long Range) (Remove and Replace)
Correction code
NEW
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.
- 2025-05-06: Released new procedure.
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Raise and support vehicle
NoteSet air suspension to "Jack Mode"
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Unlock vehicle gateway
NoteAfter vehicle has been put into "Service Mode", place keycard on center console to turn on drive rails, hold down the brake pedal, while keep pressing right hand signal button simultaneously for at least 10 seconds, "GTW UNLOCKING" should pop up on the UI right next to the VIN during these 10 seconds, once gateway is unlocked "GTW UNLOCKED 5400" will be displayed on the UI next to the VIN, the gateway will remain unlocked for 90 minutes, follow steps on Toolbox article #5582900 for any additional information
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Open powered front trunk
NoteVia exterior switch or UI
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Open tailgate
NotePress button to release
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Remove fastener covers from bed floor assembly
Note14x covers
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Remove bed floor assembly
Note10x short bolts, 15mm, 56 Nm, 2x long bolts, 15mm, 46Nm, Lift front edge with trim tool then remove panel, Recommend assistance
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Power down vehicle via UI
NoteVerify EPBs are engaged, Select charge port icon to ensure drive state is disengaged then power down vehicle via Controls > Safety > Power Off
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Remove rear underhood apron
Note9x clips
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Disconnect FRL connector then disconnect MV battery connector
Note2x connectors, Release locking tab then disconnect FRL connector, Slide eCPA to left then lift lever to release MV battery connector, Early production trucks may have black FRL connector, Release eCPA by pushing down to unlock and slide red locking tab, Wait 2 minutes for electrical circuits to discharge before disconnecting modules
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Verify operation of multimeter
NoteSet multimeter to DC voltage, Confirm multimeter is properly measuring voltage by testing MV battery, Touch lightly and do not damage terminals
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Raise vehicle fully
NoteSet to a comfortable working height, Lower to locks, Ensure locks engage on both sides to prevent tilting
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Remove rear skid plate
Note6x clips, 3x bolts, 15mm, 42 Nm, 5x bolts, 13mm, 28 Nm, 2x bolts, 10mm, 6 Nm
- 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
- Put on HV insulating gloves and leather over gloves
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Verify no HV - Install amp clamp to RDU HV harness
NoteVerify meter is zeroed out before performing measurement, Measure single cable. Verify ammeter is installed in correct direction. If current > 0.5A do not proceed with disconnecting HV connector. In this case, start vehicle electrical isolation again to make sure that all was properly shut down. Escalate for assistance as requiredIf current < 0.5A, Ok to disconnect and check voltage at HV plug on the battery side.Release locking tab and rotate the release lever up to disengage the connector, Release harness clip, Do not force the release lever up, Ensure the alignment tabs on the RDU header are not damagedMake 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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Secure RDU header connector to ancillary
Note1x connector, Verify lever is in the upright and open position, Carefully seat connector and allow lever to engage, Fully secure lever and verify red tab is locked, Do not damage any pins
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Remove pyro fuse access cover
Note4x bolts, E-Torx 5 lobe, 10 Nm
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Remove primary pyro fuse
Note2x bolts, 13mm, 5 Nm + 60 Degrees, Support pyro fuse while removing bolts
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Remove secondary pyro fuse
Note2x bolts, 13mm, 5 Nm + 60 Degrees, Support pyro fuse while removing bolts
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Lower vehicle until tires are touching the ground
NoteRaise lift off locks, then hold lock release lever to keep locks free while vehicle is lowered
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Disconnect ancillary bay MV connector
Note1x connector, Double locking, Release tab then pivot lever, Release second tab to disengage connector, Wait 1 second between locking tab release to discharge and prevent arcing
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Remove bolt securing busbar HV connector lid
Note1x bolt, EP10, 9 Nm
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Remove bolts securing HV connector to DC FC header
Note2x bolts, 10mm, 9 Nm
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Release HV connector from DC FC header
Note1x connector, Use inflatable airbag to suspend busbar assembly above ancillary assembly
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Support HV Busbar assembly
NoteSuspend assembly to maintain clearance
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Remove fast charger header doubler
Note2x bolts, E10 5 Lobe Torx, 10 Nm
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Release low voltage header
Note2x bolts, EP10, 6 Nm
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Release fasteners securing ancillary cover to HV battery
Note22x bolts, E10 5-Lobe, 6 Nm, Use E10 5-Lobe socket without magnet, The fasteners are captive and will stay attached to the penthouse cover, Follow fastening order
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Remove ancillary cover
NoteUse suction cup and maneuver around busbar and tonneau cage
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Remove ACJB to PCS HV jumper harness
Note2x connectors, Release locking tab and pull connector out of respective header, Do not pull on harness
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Release ACJB LV connector & ACJB to device cluster HV connector
Note2x connectors, Release connector locks, Depress levers and pull at connectors, Do not pull at harness
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Release ancillary connectors to center console outlet and bed outlet
Note2x connectors, Release locking tabs, Slide locks to release
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Release ACJB header fastener
Note1x bolt, T25, Torque??
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Release ACJB fasteners
Note6x bolts, E10 5 Lobe Torx, 6Nm
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Release ACJB from ancillary tray
Note2x clips, 2x datums, Release clips at headers, Slide ACJB inboard on datums
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Remove ACJB from ancillary tray
NoteLift over and out of PCS once headers clear outboard side of ancillary tray
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Install ACJB onto ancillary tray
NoteAlign headers and slide openings to datums in ancillary tray
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Slide ACJB into ancillary tray until header clips are fully engaged
NoteEnsure all fastener holes are aligned
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Secure ACJB fasteners
Note6x bolts, E10 5 Lobe Torx, 6Nm
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Secure ACJB header fastener
Note1x bolt, T25, Torque??
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Secure ancillary connectors to center console outlet and bed outlet
Note2x connectors, Slide locks to fully engage, Secure locking tabs
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Install ACJB to PCS HV jumper harness
Note2x connectors, Secure at ACJB first then fold harness over to PCS, Secure locking tab on both connectors
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Secure ACJB LV harness connector & ACJB HV harness to device cluster connector
Note2x connectors, Secure connector locks
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Install ancillary cover
NoteUse suction cup and maneuver around busbar and tonneau cage
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Secure fasteners of cover to HV battery
Note22x bolts, E10 5-Lobe, 6 Nm, Use E10 5-Lobe socket without magnet, The fasteners are captive and will stay attached to the penthouse cover, Follow fastening order
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Secure low voltage header
Note2x bolts, EP10, 6 Nm
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Secure fast charger header doubler
Note2x bolts, E10 5 Lobe Torx, 10Nm
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Clean HV connector contact surface of residual Penetrox
NoteAllow 1 minute dry time after removing Penetrox, New busbar comes with Penetrox applied to HV connector
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Clean busbar HV connector contact surface of residual Penetrox
NoteAllow 1 minute dry time after removing Penetrox, It is necessary to clean HV connector during re-use of busbar
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Apply Penetrox onto HV connector joints
NoteApply 2 drops of Penetrox A-13 about 5mm in diameter to either side of the hole on both leads, Spread evenly to verify the contact surface is fully covered
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Position busbar connector and lower onto HV header
NoteRelease bungee cord
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Install bolts securing charge port busbar kit to HV Header
Note2x bolts, 10mm, 9 Nm
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Perform Hioki resistance test at each HV joint from HV busbar lead to bolt head
Note2x HV joints, When using Hioki tester, verify the meter has been properly adjusted and set prior to usageThe acceptable resistance is between 0.050 mΩ (50 μΩ) and 0.195 mΩ (195 μΩ).If the resistance is greater than 0.195 mΩ (195 μΩ), stop work and escalate the Toolbox session.If the resistance is lower than 0.050 mΩ (50 μΩ), reposition the probes and measure again.If the resistance is repeatedly between 0.00 mΩ and 0.050 mΩ (50 μΩ), hioki test passed, proceed to next step
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Install bolt securing busbar HV connector lid
Note1x bolt, EP10, 9 Nm
- Remove leather over gloves and HV insulating gloves
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Connect Ancillary bay MV connector
Note1x connector, double locking, Rotate lever into 2nd lock, Perform a pull test to ensure connector engaged correctly
- Raise vehicle fully
- Remove all items from pockets and ensure not wearing metal items
-
Inspect HV insulating gloves
NoteCheck gloves for damage prior to use, Refer to service document TN-15-92-003
- Put on HV insulating gloves and leather over gloves
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Clean mating surface of the pyro
NoteUse a non-conductive plastic tool to clean the busbar side, Allow 1 minute for IPA to fully dry, Do not use any other types of cleaner
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Install secondary pyro fuse
Note2x bolts, 13mm, 5 Nm + 60 degrees, Support pyro fuse while installing bolts
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Install primary pyro fuse
Note2x bolts, 13mm, 5 Nm + 60 degrees, Support pyro fuse while installing bolts
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Perform Hioki resistance test at each HV joint from HV busbar lead to pyro fuse busbar
Note4x HV joints, When using Hioki tester, verify the meter has been properly adjusted and set prior to usageThe acceptable resistance is between 0.050 mΩ (50 μΩ) and 0.195 mΩ (195 μΩ).If the resistance is greater than 0.195 mΩ (195 μΩ), stop work and escalate the Toolbox session.If the resistance is lower than 0.050 mΩ (50 μΩ), reposition the probes and measure again.If the resistance is repeatedly between 0.00 mΩ and 0.050 mΩ (50 μΩ), hioki test passed, proceed to next step
- Remove leather over gloves and HV insulating gloves
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Install pyro fuse access cover
Note4x bolts, E-Torx 5 lobe, 10 Nm, Ensure seal is fully seated and undamaged, If HV pack is being shipped then pyro fuses must be removed
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Install Mid-aero shield
Note6x clips, 3x bolts, 15mm, 70 Nm, 3x bolts, 13mm, 28 Nm, 2x bolts, 10mm, 6 Nm
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Lower vehicle until tires are touching the ground
NoteRaise lift off locks, then hold lock release lever to keep locks free while vehicle is lowered
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Connect FRL connector then connect MV battery connector
Note2x connectors, Connect FRL connector then secure locking tab, Position lever to secure MV battery connector then slide eCPA to right, Early production trucks may have black FRL connector, If power cycling vehicle then ensure at least 60 seconds has passed since powering down
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Install rear underhood apron
Note9x clips, Adjust windshield seal as required
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Close powered front trunk
NoteVia exterior switch or UI
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Perform software reinstall
NoteVia UI > Service Mode > Software Reinstall > CAN ECU > Reinstall, Reinstall will begin immediately, Once firmware redeploy is complete, Verify release notes are present via UI
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Install bed floor assembly
Note10x short bolts, 15mm, 56 Nm, 2x long bolts, 15mm, 46Nm, Recommend assistance
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Install fastener covers onto bed floor assembly
Note14x covers
- Close tailgate
- Run ODIN routine PROC_ICE_X_EXIT-SERVICE-MODEvia Toolbox: (link)
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Remove vehicle from lift
NoteLower rack arms fully and remove them from under vehicle, Remove air suspension from "Jack Mode"