Mixture Heater Control

The mixture heater is located between the throttle valve and the intake manifold. It is designed to atomize fuel during cold engine starts. The ECU controls the on and off cycles of the mixture heater. When the coolant temperature is less than a preset minimum and the engine is running the ECU will send an on signal to the mixture heater. The mixture heater will remain on several minutes after coolant temperature has reached the minimum temperature preset requirement.