09/01/2025 09:15:06

Heat Exchanger - Front Drive Unit (2nd Generation) (Remove and Replace)

Correction code 39308512 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 to learn more about FRTs and how they are created. To provide feedback on FRT values, email LaborTimeFeedback@tesla.com. NOTE: See to make sure wearing proper PPE when performing the below procedure.

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Warning
This procedure is a DRAFT. Although it has been validated, Warnings and Cautions might be missing. Follow safety requirements and use extreme caution when working on or near High Voltage systems and components. Provide corrections and feedback to ServiceDevelopment@teslamotors.com.
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Note
This procedure services the heat exchanger on "Raven" front drive units.
  1. Open LH front door
  2. Lower LH front window
  3. Raise and support vehicle
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    Prepare to raise vehicle, Set air suspension to "Jack Mode", Position lift arm pads on vehicle jack pads
  4. Open hood
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    Via Controls > Front Trunk
  5. Remove rear underhood apron
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    8x clips
  6. Remove RH underhood apron
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    9x clips
  7. Remove LH underhood apron
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    9x clips
  8. Release primary and secondary drain tubes from cabin intake duct assembly
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    2x hoses
  9. Release cabin intake duct assembly from cowl panel
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    3x push clips
  10. Remove cabin intake duct assembly
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    2x clips on HEPA filter
  11. Remove HEPA filter outlet duct from vehicle
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    Lift up, pull towards front of vehicle, then rotate clockwise
  12. Power off vehicle via UI
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    Via Controls > Safety > Power Off
  13. Disconnect 12V negative terminal and First Responder Loop
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    1x nut, 10mm, 5 Nm, 1x connector, Wait at least 2 minutes before disconnecting modules or HV components
  14. Raise vehicle fully and lower lift onto locks
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    Set vehicle to comfortable working height, Make sure there's an audible click of the locks on both sides before lowering, otherwise vehicle may tilt to the side
  15. Release front aero shield
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    10x push clips
  16. Remove front aero shield
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    12x bolts, 10mm, 4 Nm
  17. Remove front bash plate extrusion
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    2x bolts, T30, 16 Nm
  18. Remove bash plate stamping and skid plate from front subframe
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    2x bolts, 10mm, 9 Nm
  19. Loosen 21mm bolts securing front of HV battery
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    2x bolts, 21mm, 115 Nm, Discard after removal
  20. Remove 21mm bolts securing front of HV battery with power tool
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    2x bolts, 21mm, 115 Nm, Discard after removal
  21. Loosen front four HV battery bolts
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    4x patch bolts, 13mm, 30 Nm, Discard after removal
  22. Remove front four HV battery bolts
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    4x patch bolts, 13mm, 30 Nm, Discard after removal
  23. Remove skid plate from between HV Battery and front subframe
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    Slowly pry bash plate out to ease removal
  24. Move coolant drain container below right side of FDU
  25. Release FDU outlet hose from heat exchanger and plug heat exchanger
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    1x spring clip, Allow excess coolant to fully drain
  26. Release upper coolant hose from heat exchanger and plug heat exchanger
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    1x spring clip, Allow excess coolant to fully drain
  27. Remove coolant drain container from underneath vehicle
  28. Place oil drain below heat exchanger
  29. Disconnect the front drive unit oil pump connector
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    1x electrical connector, Disengage locking tab, then release connector
  30. Remove the fasteners securing the oil pump to the FDU
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    2x bolts, EP10, 5 Nm + 20 degrees
  31. Remove the oil pump from the FDU
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    Pry the pump away from the FDU with a pry tool or flat blade screwdriver on both tabs, Ensure the FDU casting is not damaged, Allow the oil to drain from the FDU
  32. Position the foldable funnel under the oil filter
  33. Remove the oil filter from the FDU
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    Spin counterclockwise, 3 Nm and 135 degrees, Allow oil to drain, Install a new oil filter after removal
  34. Remove the fill plug from the FDU
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    1x plug, 8mm Allen, 15 Nm
  35. Release the clip securing the oil pump harness to the heat exchanger
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    1x fir tree clip
  36. Remove the fir tree clip from the heat exchanger and move hose aside
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    1x fir tree clip
  37. Remove the lower fastener securing the heat exchanger to the FDU
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    1x bolt, EP10, 5 Nm + 30 degrees
  38. Remove the upper fastener securing the heat exchanger to the FDU
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    1x bolt, EP10, 5 Nm + 30 degrees
  39. Remove heat exchanger from FDU assembly
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    Some oil will spill out of the FDU after removal
  40. Inspect seals of new heat exchanger
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    Replace any damaged seals, Lubricate with drive unit oil before installation
  41. Position heat exchanger onto FDU assembly
  42. Install the upper fastener securing the heat exchanger to the FDU
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    1x bolt, EP10, 5 Nm + 30 degrees
  43. Install the lower fastener securing the heat exchanger to the FDU
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    1x bolt, EP10, 5 Nm + 30 degrees
  44. Install the clip securing the upper coolant hose to the heat exchanger
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    1x fir tree clip
  45. Secure upper coolant hose onto heat exchanger
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    1x spring clip, Perform push-pull-push test
  46. Secure FDU outlet hose onto heat exchanger
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    1x spring clip, Perform push-pull-push test
  47. Install the clip securing the oil pump harness pigtail to the heat exchanger
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    1x fir tree clip
  48. Inspect seals and o-rings
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    Inspect o-rings on removed parts, 3 o-rings on pump, one o-ring on fill plug, if missing o-ring on pump ensure it is not left in housing, if damaged o-ring on plug replace affected plug, Replace all o-rings on oil pump if damaged, Check seal on oil filter, if missing check if still on housing and remove before install
  49. Install new oil filter
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    Spin clockwise, 3 Nm and 135 degrees, Lubricate 3 seals prior to installation
  50. Remove the foldable funnel from the subframe
  51. Install the oil pump into the FDU
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    Use residual oil in the oil pump cavity to lubricate the seals of the oil pump before installation, Align bolt holes with housing
  52. Install the fasteners securing the oil pump to the FDU
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    2x bolts, EP10, 5 Nm + 20 degrees
  53. Set up fill kit
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    Set fluid level to 2000 mL in measuring container, To reduce gearbox fluid variances and improve drive unit efficiency service centers are to transition to KAF1 gearbox fluid for all vehicle drive units, When refilling or topping up drive unit gearboxes, first deplete supplies of the specified SK 212-B, ATF-9, and EDF2 gearbox fluids, and only then substitute with KAF1, KAF1 gearbox fluid is fully backwards compatible with the SK 212-B, ATF-9, and EDF2 gearbox fluids and incidental mixing of the specified fluid with KAF1 is permitted, DO NOT MIX IN LARGE QUANTITIES, Eventually service centers will only stock KAF1 fluid, SK 212-B gearbox fluid is reddish, ATF-9 and EDF2 fluids are dark purple, and KAF1 fluid is amber colored, If you are unable to determine what fluid is in the drive unit, refill or top up with only KAF1, Do not mix SK 212, ATF-9, or EDF2 gearbox fluids with each other, For all 3DU drive units Model Year 2024 and later use KAF1 (part number 1646886-02-A or 1646886-04-A), For all 4DU drive units use KAF1 (part number 1646886-02-A or 1646886-04-A
  54. Install fluid transfer pump
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    Trim both input and output hoses to 26", Insert output hose into fill hole until fully seated then pull back 5mm
  55. Set up fill process
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    Place measured fluid container in drain basket, fully submerge input hose, prime pump with ATF fluid, To reduce gearbox fluid variances and improve drive unit efficiency service centers are to transition to KAF1 gearbox fluid for all vehicle drive units, When refilling or topping up drive unit gearboxes, first deplete supplies of the specified SK 212-B, ATF-9, and EDF2 gearbox fluids, and only then substitute with KAF1, KAF1 gearbox fluid is fully backwards compatible with the SK 212-B, ATF-9, and EDF2 gearbox fluids and incidental mixing of the specified fluid with KAF1 is permitted, DO NOT MIX IN LARGE QUANTITIES, Eventually service centers will only stock KAF1 fluid, SK 212-B gearbox fluid is reddish, ATF-9 and EDF2 fluids are dark purple, and KAF1 fluid is amber colored, If you are unable to determine what fluid is in the drive unit, refill or top up with only KAF1, Do not mix SK 212, ATF-9, or EDF2 gearbox fluids with each other, For all 3DU drive units Model Year 2024 and later use KAF1 (part number 1646886-02-A or 1646886-04-A), For all 4DU drive units use KAF1 (part number 1646886-02-A or 1646886-04-A
  56. Connect the 12V power supply to oil pump
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    1x connector
  57. Pump ATF fluid into Raven front drive unit
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    Assistant required, Pump 5 full strokes from fluid container, then run pump via switch box for entire fill and keep running until drain plug installed, Do not run pump when dry, If pump is not running and drain plug not installed fluid will drain from plug within 10 seconds
  58. Install fill plug into the FDU
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    1x plug, 8mm Allen, 15 Nm
  59. Disconnect 12V power supply tool from oil pump
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    1x electrical connector
  60. Connect the oil pump connector
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    1x electrical connector, Fully seat connector, then engage locking tab
  61. Spray area with brake cleaner and wipe residual fluid off with towel
  62. Remove oil drain from under vehicle
  63. Install skid plate between HV Battery and front subframe
  64. Install front bolts for HV battery with power tool
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    4x patch bolts, 13mm, 30 Nm, Install new patch bolts, Do not over tighten bolts, Torque at later step
  65. Torque the front bolts for HV battery
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    Note
    4x bolts, 13mm, 30 Nm
  66. Install 21mm bolts at front of HV battery with power tool
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    2x bolts, 21mm, 115 Nm, Install new bolts, Do not over tighten bolts, Torque at later step
  67. Torque bolts securing front of HV battery to vehicle
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    2x bolts, 21mm, 115 Nm
  68. Install bash plate stamping and skid plate to front subframe
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    Note
    2x bolts, 10mm, 9 Nm
  69. Install front lower bash plate extrusion
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    2x patch bolts, T30, 16 Nm
  70. Position front aero shield to vehicle
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    10x clips
  71. Install front aero shield to vehicle
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    12x bolts, 10mm, 4 Nm
  72. Position front aero shield to vehicle
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    10x clips
  73. Lower vehicle fully
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    Raise lift off locks, then hold lock release lever to keep locks free while vehicle is lowered
  74. Connect First Responder Loop and 12V negative terminal
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    1x connector, 1x nut, 10mm, 5 Nm, Connect First Responder Loop first
  75. Remove coolant bottle cap
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    1x cap
  76. Connect laptop to vehicle with a tethered Ethernet connection via Toolbox 3
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    1x connector, 2x clips, Newer models will access connector below MCU with cubby removed, Older models will access port at LH side of IP with end cap removed. Open Toolbox 3 website and establish connection to vehicle: https://toolbox.teslamotors.com, Select connection status icon at top right corner and select Connect Locally (icon will turn green when vehicle is connected), Local connection will enable service mode plus on display
  77. Perform coolant air purge. TEST_VCFRONT_X_THERMAL-COOLANT-AIR-PURGE-STARTvia Toolbox: (link).
  78. Inspect coolant level and top off as necessary
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    Ensure that fluid level is at Max line
  79. Install coolant bottle cap
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    1x cap
  80. Install HEPA filter outlet duct
  81. Position cabin intake duct assembly
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    2x tabs, One on each side
  82. Install cabin intake duct assembly to cowl panel
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    3x push clips
  83. Secure primary and secondary drain tubes to cabin intake duct assembly
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    2x hoses
  84. Install LH underhood apron
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    9x clips
  85. Install RH underhood apron
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    9x clips
  86. Install rear underhood apron
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    8x clips
  87. Close hood
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    Press firmly in green highlighted areas (see image), Damage may result from pressure elsewhere on hood
  88. Disconnect Toolbox from vehicle and install cubby under MCU
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    1x connector, 2x clips, Ensure diagnostic cables are tucked into appropriate position then engage cubby
  89. Remove vehicle from lift
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    Lower rack arms fully and remove them from under vehicle, Remove air suspension from "Jack Mode" via Controls > Service > '' JACK MODE''
  90. Raise LH front window
  91. Close LH front door