The sensor, built into the body of the temperature-sensitive valve, opens the valve when the intake air temperature drops below the permissible limit, thereby ensuring the inflow of air heated from the exhaust manifold and correcting the temperature of the air flow supplied to the engine.
As the intake air temperature increases, the valve flap gradually closes, reducing the supply of heated air.
With a hair dryer and an aerosol can of coolant on hand, the proper operation of the intake air temperature control assembly can be easily tested.
The procedure for removing the valve assembly is described in Section Removal and installation the air cleaner assembly.