Tesla Model S: Coolant Heater - Electric - Battery - 2nd Generation (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.
This procedure only applies to vehicles with the 2nd generation High
Voltage configuration. For vehicles with the 1st generation High Voltage
configuration, refer to Coolant Heater - Electric - Battery - 1st
Generation (Remove and Replace).
Removal
- Perform the vehicle electrical isolation procedure (refer
to procedure).
- Remove the extension box from the underhood storage compartment
(refer to procedure).
- Slide the harness connector off of the base of the coolant
heater assembly.
- At the base of the coolant heater bracket, disconnect the
harness that leads to the DCDC converter.
- Release the gray harness from the forward junction box (FJB).
Caution: When looking at the FJB from the front of the
vehicle, this connector is the second from the left. Do not
release the leftmost connector.
- Release any clips that secure the coolant heater assembly to the
body.
- Release the 2 bolts that secure the coolant heater assembly to
the crossmember (torque 8 Nm).
Caution: Although the cooalnt heater assembly is now loose
within the vehicle, do not attempt to remove it at this time.
- Clamp the input and output coolant hoses on the coolant heater:
- Clamp the hose on the lower LH nipple as close to the
coolant heater as possible.
- Clamp the hose on the upper nipple outboard of the battery
inlet temperature sensor.
1
|
Clamp hose to lower LH
nipple |
2
|
Clamp hose to upper
nipple |
- Place absorbent material beneath the coolant hoses.
- Place a container beneath the coolant heater to catch any
spilled coolant.
Caution: During the next steps, do not allow coolant to spill
onto the High Voltage Battery, forward junction box, DCDC converter,
coolant heater, or any harnesses.
- Release the coolant hose from the lower LH side of the coolant
heater. Drain the coolant from the coolant heater into the
container.
- Place a cap or plug over the lower LH side nipple on the coolant
heater.
- Release the coolant hose outboard of the battery inlet
temperature sensor. Drain excess coolant into the container.
Note: Do not release the coolant hose from the top
of the coolant heater.
- Place a cap or plug over the upper nipple on the coolant heater.
- Remove the coolant heater from the vehicle.
Installation
Installation procedure is the reverse of removal, except for the
following:
- 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).
READ NEXT:
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
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
SEE MORE:
Removal
Remove the driver's side footwell cover (refer to procedure).
Disconnect the lower intermediate shaft (refer to procedure).
Disconnect the lower intermediate shaft from the slot in the
upper intermediate shaft.
Release the upper intermediate shaft from the co
Check pressure and refill air as needed
This alert does NOT indicate that there is a flat tire.
The tire pressure monitoring system (TPMS) has detected that the air pressure in
one or more of your tires is at least
20% lower than the recommended cold tire pressure.
See Maintaining Tire Pressures