Description & Operation: Description
The Thermal Management Module (TMM) is a device that controls the flow rate of the coolant according to the coolant temperature.
At the initial startup, the TMM adjusts the valve to let the coolant flow only at the engine to help fast warm up and the fuel efficiency is increased through the fast warm up.
When the coolant temperature increases the TMM adjusts the valve and controls the rate of the coolant flow to the radiator, heater, etc. and controls the coolant temperature.