Tesla Model 3: Penthouse Coolant Leak Test
DRAFT
Warning:
This procedure was derived from pre-production computer models, and
might not reflect the real-world situation. Warnings and cautions might be
missing. Follow safety requirements and use extreme caution when working on or
near high voltage systems and components.
SPECIAL TOOLS
Drive Unit Pressure Test Fixture (1053600-00-C)
Kit, Coolant Leak Test Adapters, Model 3 (1132185-00-B)
Kit, Coolant Drain & Fill Adapters, M3 (1133843-00-A)
Kit, Svc Plug, Cooling Hose, Model 3 (1135762-00-A)
Procedure
- Disconnect 12V power. See
12V Power (Disconnect and Connect).
- Remove the mid aero shield panel. See
Panel - Aero Shield - Mid (Remove and Replace).
- Remove the rear HV battery skid plate. See
Skid Plate - HV Battery - Rear (Remove and Replace).
- Position a coolant drain under the rear RH side of the HV battery.
![Penthouse Coolant Leak Test](images/books/1773/GUID-3E5FBD42-41F8-475E-A21B-386C9DD9D427-online_small.png)
- Disconnect the rear powertrain supply hose from the RH underside of the
penthouse, plug the female fitting of the hose, and allow the battery to
drain.
- Connect the coolant pressure test adapter to the HV battery.
- Connect the drive unit pressure test fixture to the coolant pressure
test adapter.
- Close both valves P1 (inlet) and P2 (outlet) on the test fixture, and
connect a compressed air supply line.
- Fully close the regulator, and then open P1 (inlet valve).
- Set the pressure regulator of the test fixture to 50 psi.
- Position the coolant drain under the rear LH side of the HV battery.
![Penthouse Coolant Leak Test](images/books/1773/GUID-6E1B7FF1-9401-4125-82EC-22D81965DFDF-online_small(7).png)
- Disconnect the rear drive unit inverter inlet hose from the LH side of
the HV battery, plug the female fitting of the hose, and allow the battery
to drain.
- Connect the coolant drain adapter to the LH side male fitting under the
penthouse, and direct the tube to the coolant waste container.
- If the coolant waste container is a bottle, push a shop towel partially
into the bottle neck, to prevent coolant from splashing out.
- Slowly open P2 (outlet valve) to speed the drain, and then close P2 (outlet
valve).
- Disconnect the coolant drain adapter, and then connect the coolant
pressure test adapter plug to the HV battery.
- Open P2 (outlet valve) again, and allow at least 110 seconds for the
pressure to stabilize to 50 psi.
- Close P1 (inlet valve), record the starting pressure displayed, and
start a 4 minute timer.
- If the penthouse cover was removed as part of another procedure, inspect
the coolant input and output tubes and fittings for leaks.
- After 4 minutes record the ending pressure displayed.
- Subtract the ending pressure from the starting pressure, and if:
- The difference is greater than 0.35 psi, check the hose, adapter, and
plug fittings, close P2 (outlet valve) and open P1 (inlet valve), check the
regulator pressure, and then retest from step
17. If the difference is still greater than 0.35 psi, escalate a Toolbox
session.
- The difference is less than 0.35 psi, continue the procedure
- Disconnect the air supply from the test fixture.
- Open P1 (inlet valve), and disconnect the test fixture from the coolant
pressure test adapter.
- Remove the coolant pressure test adapter and coolant pressure test
adapter plug from the HV battery, and the plugs from the hoses.
- Connect the rear powertrain supply hose to the RH side of the HV battery,
and the rear drive unit inverter inlet hose to the LH side of the HV battery.
- Remove the coolant drain from under the vehicle.
- Install the rear HV battery skid plate. See
Skid Plate - HV Battery - Rear (Remove and Replace).
- Install the mid aero shield panel. See
Panel - Aero Shield - Mid (Remove and Replace).
- Connect 12V power. See
12V Power (Disconnect and Connect).
- Perform a vacuum refill the cooling system. See
Cooling System (Vacuum Refill).
READ NEXT:
SPECIAL TOOLS
Drive Unit Pressure Test Fixture (1053600-00-C)
Kit, Coolant Leak Test Adapters, Model 3 (1132185-00-B)
Kit, Coolant Drain & Fill Adapters, M3 (1133843-00-A)
Kit, Svc Plug, Cooling H
SPECIAL TOOLS
Drive Unit Pressure Test Fixture (1053600-00-C)
Kit, Coolant Leak Test Adapters, Model 3 (1132185-00-B)
Kit, Coolant Drain & Fill Adapters, M3 (1133843-00-A)
Kit, Svc Plug, Cooling H
SEE MORE:
Install the clips that attach the front end module electrical harness to
the front end carrier.
Install the hood latch.
Install the secondary hood latch actuator.
With an assistant, position the front end carrier onto the vehicle for
installation.
Note: Hand-tighten the upper bolts of th
Remove
Remove the 2nd row lower seat cushion. See Seat Cushion - Lower - 2nd
Row (Remove and Replace).
Remove the rear underhood apron. See Underhood Apron - Rear (Remove and
Replace).
Disconnect 12V power. See 12V Power (Disconnect and Connect).
Remove the LH instrument panel end cap. Se