2026-04-03
Heat Exchanger - Front Drive Unit (Remove and Install)
Correction code
3901049081
3901049082
FRT
1.32
NOTE: Unless otherwise explicitly stated in the procedure, the correction code and FRT listed above 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.
NOTE: See Personal Protection to make sure you
are wearing proper PPE when performing the procedure below.
NOTE: See Ergonomic Precautions for safe and healthy working practices.
- 2026-04-03: Updated entire procedure with latest time study.
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.
Warning
Cybertruck electronics are powered by a
48V "mid voltage" or "MV" architecture that is designed to improve efficiency. Servicing
MV components requires extra knowledge and care in order to avoid personal and/or
vehicular harm. Read and understand MV precautions in Electrical Precautions and make sure any required
MV-related training courses have been completed, as applicable.
- Raise and support the vehicle. See Raise Vehicle - 2 Post Lift.
- Open the LH front door and lower the LH front window.
- Place the vehicle into Service Mode. See Service Mode.
- Unlock the vehicle Gateway. See Gateway (Unlock).
-
Navigate to Refrigerant System through
UI
NoteSelect Service Mode > Thermal > Refrigerant System
- Run ODIN routine PROC_VCFRONT_X_START-THERMAL-FILL-DRAIN-COOLANTvia Toolbox:(link)
- Open the powered frunk.
- Remove the rear underhood apron. See Underhood Apron - Rear (Remove and Install).
- Disconnect MV power. See Mid-Voltage Power (Disconnect and Connect) (Modify).
-
Raise vehicle fully and lower lift onto
locks
NoteSet vehicle to comfortable working height, Ensure an audible click of locks on both sides is heard before lowering, Vehicle may tilt to the side if both locks are not engaged
- Remove the front skid plate. See Skid Plate (Remove and Install).
- Remove the frontaero shield. See Aeroshield - Front (Remove and Install).
-
Disconnect CFM connectors
Note2x connectors, 2x clips
-
Place coolant catcher below RH front of
vehicle
-
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
- Remove the frunk assembly. See Frunk Assembly (Remove and Install).
- Remove the front fascia assembly. See Front Fascia (Remove and Install).
-
Remove lower CFM fasteners
Note2x bolts, 10mm, 10 Nm
-
Remove fore crossmember
Note2x bolts, 18mm, 90 Nm, Push up on CFM, Use hammer if needed, Recommend assistance
-
Disconnect radiator to manifold hose
from radiator and plug connections
Note1x spring clip, Remove from vehicle, Plug hoses
-
Disconnect manifold to radiator hose
from radiator and plug connections
Note1x spring clips, Plug hoses
-
Release harness from CFM
Note1x grommet, 2x connectors, 5x harness clips, Pull red locking tab to disengage louver connector, Release temperature sensor then disconnect, Release grommet and pull harness through from frunk area
-
Remove upper CFM fasteners
Note2x bolts, 10mm, 10 Nm
-
Remove CFM
NoteRecommend assistance, Remove from below impact beam, Ensure harness is not pinched during removal
-
Disconnect coolant hoses from FDU heat
exchanger
Note2x spring clips
-
Remove FDU heat exchanger
Note2x bolts, EP10, 5 Nm, Ensure O-rings do not remain on drive unit, Empty oil and coolant from exchanger into approved containers
-
Install FDU heat exchanger
Note2x bolts, EP10, 5 Nm, Ensure O-rings are not pinched
-
Connect coolant hoses to FDU heat
exchanger
Note2x spring clips, Perform a push-pull-push test to ensure hoses are fully seated
-
Install CFM
NoteInstall from bottom, Assistance recommend Manipulate as required, Ensure harness is not pinched during install
-
Connect CFM connectors
Note2x connectors, Engage locking tab
-
Install upper CFM fasteners
Note2x bolts, 10mm, 10 Nm
-
Secure harness to CFM
Note1x grommet, 2x connector, 1x harness clip, Secure grommet then connect temperature sensor, Engage locking tab on louver connector
-
Connect radiator inlet coolant
hose
Note1x spring clips,Ensure hose is fully engaged with a push-pull-push test
-
Connect radiator to manifold hose to
radiator
Note1x spring clip, Ensure hose is fully engaged with a push-pull-push test
-
Install fore crossmember
Note2x bolts, 18mm, 90 Nm, Lift CFM away from beam to aid in clearance, Install beam by sliding rewards
-
Install lower CFM fasteners
Note2x bolts, 10mm, 10 Nm
-
Install front lower fascia
assembly
NoteEnsure no harnesses are pinched
-
Install RH fascia fastener and
connectors
Note1x bolt, 10mm, 6 Nm, 1x clip, 3x connectors, Pull wheel liner back for access, Engage locking tab
-
Secure RH wheel liner
Note4x clips
-
Install LH fascia fastener
Note1x bolt, 10mm, 6 Nm, Pull wheel liner back for access
-
Secure LH wheel liner
Note4x clips
-
Install front fascia fasteners and
covers
Note2x covers, 6x bolts, 10mm, 4 Nm, Install tow hook covers
-
Install front center applique
Note8x tabs, 1x connector, Ensure all tabs engage, Secure frunk release trigger connector
- Perform cooling sysstem vacuum fill. See Cooling System (Vacuum Refill).
- Reconnect MV power. See Mid-Voltage Power (Disconnect and Connect) (Modify).
-
Access thermal system routines using the
UI
NoteSelect quick controls > Service mode > Thermal > Actions
-
Run ODIN routine
PROC_EGGRIGHT3_X_THERMAL-FILL-DRAIN-STOPvia Service Mode:
- Thermal ➜ Actions ➜ Stop Thermal Fill/Drain
- Thermal ➜ Coolant System ➜ Stop Coolant Fill/Drain
- Thermal ➜ Refrigerant System ➜ Stop Refrigerant Fill/Drain
- Drive Inverter ➜ Front Drive Inverter Replacement ➜ Stop Fluid Fill/Drain
- Drive Inverter ➜ Rear Drive Inverter Replacement ➜ Stop Fluid Fill/Drain
- Drive Inverter ➜ Rear Left Drive Inverter Replacement ➜ Stop Fluid Fill/Drain
- Drive Inverter ➜ Rear Right Drive Inverter Replacement ➜ Stop Fluid Fill/Drain
- Drive Unit ➜ Front Drive Unit Replacement ➜ Stop Coolant Fill/Drain
- Drive Unit ➜ Rear Drive Unit Replacement ➜ Stop Coolant Fill/Drain
-
Select "Start Coolant Air Purge" using
the UI
NoteTouch time only, wait until coolant pumps stop running (audible noise), Routine Passed will appear, but pumps will run for 10 minutes, If you start next another routine during this time it will fail, Make sure vehicle is not in "Drive", Routine is still running despite the completed message, Speeds can be monitored in garage under PT Thermal tab, Idle speed = ~1500 RPM, Test will vary speeds from 3500-6500 RPM and actuate valves between SERIES and PARALLEL, Putting vehicle into "Drive" will stop this routine, If speeds hover at 7000 RPM, this indicates the pumps are air locked, perform a vacuum fill, Continue to add coolant and purge until the coolant level reaches between the NOM and MAX Lines on the bottle
- Select “TEST-SELF_DIF_X_OIL-PUMP-PRESSURE”, Click ‘Run’, and allow routine to pass
-
Raise vehicle fully and lower lift onto
locks
NoteSet vehicle to comfortable working height, Ensure an audible click of locks on both sides is heard before lowering, Vehicle may tilt to the side if both locks are not engaged
-
Release RH side acoustic cover from
lower portion of acoustic cover
Note2x clips
-
Release RH side acoustic cover from
FDU
Note2x clips, Route cover between subframe and halfshaft
-
Remove oil fill plug from FDU
Note1x plug, 8mm Allen, 15 Nm, Verify the O-ring is not damaged, Replace O-ring as needed
-
Inspect plug O-rings
NoteInspect O-ring on fill plug, if damaged replace affected plug
-
Position oil pump hose into FDU fill
hole
-
Pump fluid into FDU
NotePump fluid into drive unit until fluid spills out
-
Remove oil pump hose from FDU fill
hole
NoteTurn valve to off and remove from fill hole
-
Install oil fill plug onto FDU
Note1x plug, 8mm Allen, 15 Nm, Verify the O-ring is not damaged, Replace O-ring as needed
- Spray area with brake cleaner and wipe any residual fluid
-
Secure RH side acoustic cover onto
FDU
Note2x clips, Route cover between subframe and axle
-
Secure RH side acoustic cover onto lower
portion of acoustic cover
Note2x clips
- Install the front aero shield. See Aeroshield - Front (Remove and Install).
- Install the skid plate. See Skid Plate (Remove and Install).
-
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
- Select “TEST-SELF_DIF_X_OIL-PUMP-PRESSURE”, Click ‘Run’, and allow routine to pass
-
Perform Thermal Performance through the
UI
NoteSelect Thermal > Actions > Test Thermal Performance, click Run, close once routine is completed
- Install the frunk assembly. See Frunk Assembly (Remove and Install).
- Install the rear underhood apron. See Underhood Apron - Rear (Remove and Install).
- Close the powered frunk.
- Remove the vehicle from the lift. See Raise Vehicle - 2 Post Lift.
- Run ODIN routine PROC_ICE_X_EXIT-SERVICE-MODEvia Toolbox:(link)
- Raise the LH front window and close the LH front door.