Electric Powertrain Cooling: Other Ford Focus III

Electric Motor Circuit

The electric motor circuit cools the electric motor and the DC / DC converter (converts high voltage to low voltage to power the 12 volt system). The electric motor diverter valve acts as a system thermostat, allowing the coolant to flow within the motor circuit while the motor warms. As the coolant warms, the diverter valve slowly opens to allow coolant flow to the radiator.

The upper temperature limit for the electric motor circuit is 80 degrees C (176 degrees F). An ECT sensor in the electric motor circuit provides the PCM with coolant temperature information.

High Voltage Battery Circuit

The high voltage battery circuit uses coolant to both cool and heat the high voltage batteries. The batteries operate best when the battery temperature is between 10 degrees C (50 degrees F) and 35 degrees C (95 degrees F). When the vehicle is charging and the high voltage battery circuit coolant temperature is below 10 degrees C (50 degrees F), a PCM -controlled in-line coolant heater warms the coolant flowing through the high voltage battery circuit. During driving, if the electric motor coolant is warmer than the high voltage battery circuit coolant, the battery circuit diverter valve allows coolant from the motor circuit to enter the battery circuit to help heat the batteries.

When the battery circuit is above 35 degrees C (95 degrees F), a PCM -controlled in-line chiller that uses the vehicle's A/C system cools the coolant flowing through the high voltage battery circuit.

The upper temperature limit for the high voltage battery circuit is 50 degrees C (122 degrees F). An ECT sensor in the high voltage battery circuit provides the PCM with coolant temperature information.

The in-line coolant filter is part of the high voltage battery circuit. Install a new filter

1. when replacing the coolant for scheduled maintenance (10 years/150, 000 miles).
2. when a vehicle collision damages the radiator enough to require radiator replacement.
3. when any coolant pump fails and there are impeller fragments in the coolant.

Cabin Heater Circuit

The cabin heater circuit provides warm coolant to the heater core to warm the passenger compartment. A PCM -controlled cabin coolant heater warms the coolant. The cabin heater diverter valve allows warm coolant from the electric motor circuit, when available, to enter the cabin heater circuit to provide warm coolant for cabin heat.

The upper temperature limit for the cabin heater circuit is 80 degrees C (176 degrees F). An ECT sensor in the cabin heater circuit provides the PCM with coolant temperature information.

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SPECIAL TOOLS 3-Way HD Antifreeze Coolant Test Kit 328-00001 or equivalent Coolant/Battery Refractometer ROB75240 or equivalent D-Gas Adapter 300-OTC014-R1068 or equivalent Radiator Tester STN12270 or equivalent

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LUBRICANTS, FLUIDS, SEALERS AND ADHESIVES

Activation

Note. Have an adequate amount of Motorcraft® Orange Antifreeze/Coolant ready to fill the cooling system. Once the pumps are activated, the coolant level in the degas bottle will fall very quickly. Do not allow air into the cooling system. The entire cooling system holds 15L (15.8 qt).

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1. WARNING: Before beginning any service procedure in this information, REFER to Safety Warnings in 100-00 General Information. Failure to follow this instruction may result in serious personal injury. Refer to: «ENGINE COOLING SYSTEM HEALTH AND SAFETY PRECAUTIONS»(ref-566930-S12769626302013071700000) (100-00 General Information, Description and Operation).
2. NOTE: Once the scan tool begins the coolant fill, verify 3 valves are at 50% (raised notch is in the middle) and 3 pumps are running by feeling that each pump is vibrating. Using a scan tool, navigate to Cooling System Fill and follow the on-screen instructions.
3. Once the Cooling System Fill is complete, using a scan tool, navigate to Cooling System Purge/Degas and follow the on-screen instructions.

Note. Use this procedure only for 150, 000 mile/10 year scheduled maintenance coolant replacement.

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1. WARNING: Before beginning any service procedure in this information, REFER to Safety Warnings in 100-00 General Information. Failure to follow this instruction may result in serious personal injury. Refer to: «ENGINE COOLING SYSTEM HEALTH AND SAFETY PRECAUTIONS»(ref-566930-S12769626302013071700000) (100-00 General Information, Description and Operation).
2. NOTE: Do not perform the cooling system filling and bleeding procedure after installing a new coolant filter. Refer to: «COOLANT FILTER»(ref-566956-S03011943012013071700000) (303-03 Electric Powertrain Cooling, Removal and Installation).
3. General Equipment : Hose Clamp(s) General Equipment : Hose Clamp Remover/Installer
4. General Equipment : Hose Clamp(s) General Equipment : Hose Clamp Remover/Installer
5. NOTE: Use Flusher, Ford Engine 303-1525 or a commercially available coolant exchanger. Drain hose. Install Special Service Tool : 303-1525 Flusher, Engine General Equipment : Hose Clamp Remover/Installer
6. NOTE: Use Flusher, Ford Engine 303-1525 or a commercially available coolant exchanger. Fill hose. Install Special Service Tool : 303-1525 Flusher, Engine
7. NOTE: Use Flusher, Ford Engine 303-1525 or a commercially available coolant exchanger. Do not exceed 138 kPa (20 psi) fluid pressure. NOTE: Collect drained coolant for proper disposal. Using 15L (15.8 qt) Motorcraft® Orange Antifreeze/Coolant Prediluted or a 50/50 mixture of Motorcraft® Orange Antifreeze/Coolant Concentrate and distilled water, exchange the coolant in the battery loop. Special Tool(s) : 303-1525 Flusher, Engine General Equipment : Hose Clamp(s) Material : Motorcraft® Orange Antifreeze/Coolant Concentrated/VC-3-B (WSS-M97B44-D) Material : Motorcraft® Orange Antifreeze/Coolant Prediluted/VC-3DIL-B (WSS-M97B44-D2)
8. Test the coolant from the battery outlet hose after disconnecting the Flusher, Ford Engine or commercially available coolant exchanger with a refractometer. Temperature should be within the following range. If not, reattach the drain hose, reposition the clamping pliers and continue to exchange the coolant until the coolant tests within specification. Remove Special Service Tool : 303-1525 Flusher, Engine General Equipment : Hose Clamp(s) General Equipment : Hose Clamp Remover/Installer Temperature : -58-15°F (-50-26°C)
9. General Equipment : Hose Clamp Remover/Installer
10. Remove Special Service Tool : 303-1525 Flusher, Engine
11. General Equipment : Hose Clamp Remover/Installer
12. General Equipment : Hose Clamp(s)
13. NOTE: Be prepared to capture escaping fluid.
14. NOTE: Be prepared to capture escaping fluid. General Equipment : Hose Clamp(s)
15. NOTE: Be prepared to capture escaping fluid.
16. NOTE: Be prepared to capture escaping fluid. General Equipment : Hose Clamp Remover/Installer
17. NOTE: Be prepared to capture escaping fluid. General Equipment : Hose Clamp Remover/Installer
18. General Equipment : Hose Clamp Remover/Installer
19. General Equipment : Hose Clamp Remover/Installer
20. General Equipment : Hose Clamp Remover/Installer
21. General Equipment : Hose Clamp(s)
22. General Equipment : Hose Clamp(s)
23. Refer to: «COOLING SYSTEM FILLING AND BLEEDING»(ref-566956-S14351626642013071700000) (303-03 Electric Powertrain Cooling, General Procedures).

Radiator

SPECIAL TOOL(S)/GENERAL EQUIPMENT

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1. WARNING: Before beginning any service procedure in this information, REFER to Safety Warnings in 100-00 General Information. Failure to follow this instruction may result in serious personal injury. Refer to: «ENGINE COOLING SYSTEM HEALTH AND SAFETY PRECAUTIONS»(ref-566930-S12769626302013071700000) (100-00 General Information, Description and Operation).
2. General Equipment : Knife
3. Finger tighten only
4. NOTE: Be prepared to capture escaping fluid.
5. General Equipment : Cable Ties
6. Both sides. Torque : 25 Nm
7. Torque : 25 Nm

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1. To install, reverse the removal procedure.
2. Refer to: «COOLING SYSTEM FILLING AND BLEEDING»(ref-566956-S14351626642013071700000) (303-03 Electric Powertrain Cooling, General Procedures).

Electric Motor Coolant Pump

Special Tool(s)/General Equipment

Hose Clamp Remover/Installer

High Voltage Battery Coolant Pump

Special Tool(s)/General Equipment

Hose Clamp Remover/Installer

Cabin Heater Coolant Pump

Special Tool(s)/General Equipment

Hose Clamp Remover/Installer

Electric Motor Coolant Diverter Valve

Special Tool(s)/General Equipment

Hose Clamp Remover/Installer

High Voltage Battery Coolant Diverter Valve

Special Tool(s)/General Equipment

Hose Clamp Remover/Installer

Cabin Heater Coolant Diverter Valve

Special Tool(s)/General Equipment

Hose Clamp Remover/Installer

Coolant Filter

Special Tool(s)/General Equipment

Hose Clamp Remover/Installer

High Voltage Battery Coolant Heater

Special Tool(s)/General Equipment

Hose Clamp Remover/Installer