Motor Electronics Cooling System (MECS)

The vehicle uses a pump driven cooling system, referred to as the Motor Electronics Cooling System (MECS) pump, to transfer heat generated by the Electronically Controlled Continuously Variable Transmission (eCVT) and the Hybrid Electric Vehicle (HEV) DC/DC converter to the atmosphere. The system uses a coolant-to-air radiator design.

The MECS pump is an electric pump that runs any time the ignition is in the ON position. Unlike traditional cooling systems, there is no thermostat in the MECS, so coolant flow should be continuous and considerably less than traditional powertrain cooling systems.

The flow direction is from the degas bottle and DC/DC converter to the MECS pump through the eCVT, then through the MECS radiator from the LH to RH side of the vehicle back to the degas bottle.

The MECS cooling pump will make an audible noise if it is running and a slight vibration may be felt by touch. Flow can be verified by visually inspecting for coolant flow into the degas bottle. Only a portion of the coolant flow is diverted to the degas bottle via the "T" in the coolant outlet hose.

Fig 1: Locating Motor Electronics Cooling System Components (1 Of 2)

Courtesy of FORD MOTOR CO.

Fig 2: Locating Motor Electronics Cooling System Components With Torque Specifications (2 Of 2)

Courtesy of FORD MOTOR CO.