Tesla Model S: Coolant Heater - Electric - Battery (Dual Motor) (Remove and Replace)
Warning: Only technicians who have been trained in High
Voltage Awareness are permitted to perform this procedure. Proper
personal protective equipment (PPE) and insulating HV gloves with a
minimum rating of class 00 (500V) must be worn any time a high
voltage cable is handled. Refer to Tech Note TN-15-92-003, "High
Voltage Awareness Care Points" for additional safety information.
Removal
- Disconnect 12V and HV power (refer to procedure).
- Remove the wiper motor (refer to procedure).
- Remove the LH and RH shock tower to bulkhead struts (refer to
procedure).
- Release the 2 bolts that secure each fuse box to the front
crossmember (torque 5 Nm).
- If the vehicle is equipped with air suspension, release the
bolts (x2) that secure the air reservoir (torque 2.5 Nm). Carefully
set the reservoir in the RH side of the underhood area.
Note: It is not necessary to disconnect the
air lines.
- On top of the forward junction box, release the harness that
leads to the battery coolant heater.
Caution: Do not disconnect the RH most harness from
the forward junction box.
Warning: Before continuing, put on high voltage gloves.
- Disconnect the temperature sensor connector from the coolant
hose.
Note: Disconnecting this connector allows
the coolant hose to move out of the way more freely when the
heater is removed.
Note: Before continuing, place a coolant catcher
underneath the vehicle and place suitable absorbent material around
the affected area.
- Clamp and disconnect the 2 coolant hoses.
- At the base of the coolant heater bracket, disconnect the
harness that leads to the DCDC converter.
- Slide the harness connector off of the base of the coolant
heater assembly.
- Release the 2 bolts that secure the coolant heater assembly to
the crossmember (torque 8 Nm).
InstallationInstallation procedure is the reverse of removal, except for the
following:
- Transfer the coolant hose and bracket to the new part.
- Ensure that all areas are clean and dry before installing
the coolant heater.
- When all components have been reinstalled, refill and bleed
the cooling system (refer to procedure).
- If necessary, adjust the wipers (refer to procedure).
READ NEXT:
Warning: If the 12V power supply is
disconnected, do not attempt to open any doors with door glass
in closed position. Failure to follow this instruction could
result in door glass shat
Warning: If the 12V power supply is disconnected, do
not attempt to open any doors with door glass in closed position.
Failure to follow this instruction could result in door glass
shat
Coolant pump locations:
RWD Model S
Dual Motor Model S
1
Powertrain coolant pump 1
RWD vehicle
2
Battery
SEE MORE:
Key LearnCaution: Before beginning this procedure, it is necessary to
have all keys present. Any keys that are not present will deactivate
after completing the procedure.
Sit in the driver's seat and step on the brake pedal to turn on
the drive rail.
Connect a laptop with To
Removal
Remove liftgate glazing (refer to procedure)
Disconnect GPS harness connector.
Release GPS antenna from adhesive bond.
Release wiring harness from liftgate.
Note: Note installed pos