The sensor mounted in the body of the temperature-sensitive valve, when the intake air temperature drops below the permissible limit, opens the damper, thereby ensuring the flow of air heated from the exhaust manifold and correcting the temperature of the air flow supplied to the engine.
As the intake temperature rises, the damper blade gradually closes, reducing the supply of heated air.
With a hair dryer and an aerosol can of coolant handy, the proper functioning of the intake air temperature control assembly can be easily checked.
A description of the procedure for removing the valve assembly is given in Section Removing and installing the air cleaner assembly.