Pinpoint Test A: Loss Of Coolant
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- Normal Operation and Fault Conditions
The cooling system is a closed system providing for coolant expansion and contraction as well as changes in pressure as coolant warms and cools with operation. Various gaskets, seals, hoses and clamps contain coolant within the cooling system and keep other fluids and contaminants from entering the cooling system.
Possible Sources
- Coolant hoses or tubes
- Hose clamps
- Leaking coolant pump, seals or gaskets
- Pressure relief cap
- Coolant pump leaking from weep hole
- Degas bottle
- Auxiliary radiator
- WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.
- A1 CHECK COMPONENTS FOR DAMAGE OR FAILURE
- Visually inspect the possible sources for obvious signs of physical damage or failure.
Are any concerns present?
Yes REPAIR as needed. No GO to A1 - A2 CHECK THE ENGINE COOLANT LEVEL AND PRESSURE TEST THE SYSTEM COOLING SYSTEMNOTE: Allow the system to cool before checking the engine coolant level.
- Ignition OFF
- Visually inspect the engine coolant level at the degas bottle and adjust as necessary. Pressure test the engine cooling system. Refer to Cooling System Pressure Test .
Does the engine cooling system leak externally?
Yes REPAIR or INSTALL new components. No The electric powertrain cooling system is operational.