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 battery radiator.

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