Cold Zone Cooling Control

The engine control module (ECM) is located in the cold zone in front of the windshield for optimum cooling, but in extremely hot climates and in hot engine compartments, the internal temperature in the engine control module (ECM) can reach the temperature limit (+105 °C).

By overriding the recirculation shutter and the blower fan, the air flow in the cold zone increases, which cools the engine control module (ECM). This may result in the customer noticing hot air being blown into the passenger compartment without wanting it.