Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Cooling Systems: Notes
DESCRIPTION
| 1 - Radiator |
| 2 - Low Pressure Battery Coolant Bottle |
| 3 - Chiller |
| 4 - Auxiliary Coolant Pump |
| 5 - Battery Coolant Heater |
| 6 - Auxiliary Coolant Pump |
| 7 - Radiator Outlet Temperature Sensor |
| 8 - 3 Way Valve |
The Battery Electric Vehicle (BEV) heating and cooling requirements are managed with a combination of two cooling system loops and the vehicles HVAC refrigerant system. The high temperature system is used to heat the passenger compartment. The low temp/battery cooling system is used for cooling of the power electronics, heating and cooling of the high voltage battery. The chiller valve in the HVAC system service is part of the battery coolant loop used to cool the high voltage battery.
- The High Temperature Engine Coolant Loop consists of a Coolant Heater connected to the high voltage system, and an Electric Coolant Pump in addition. The high temperature cooling loop can provide heat to the passenger compartment when necessary.
- The Low Temperature Coolant Loop removes heat generated by the electric drive motor and controls.
- The Battery Coolant Loop obtains heat from the High Voltage Coolant Heater or disperses heat through a chiller valve in the HVAC refrigerant system to heat or cool the HV battery.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.