To detect malfunctions in the AIR system circuit.Īs a large current is required to drive the air pump and ASV, an AID is installed to this system. Secondary air passage when the AIR system is ON and OFF, and transmits aĮquipped to drive the pump and valve, but also has a diagnosis function The pressure sensor detects the pressure in the Is pumped to the exhaust port through the ASV.ĪID drives the ASV and the air pump according to command signals The secondary air is supplied by the air pump and ![]() Pumps secondary air to the exhaust port of the cylinder head to purify For a short time after a cold engine start, the AIR system Valve (ASV), a pressure sensor, the Air Injection Control Driver (AID)Īnd the ECM. Toyota Tundra Service Manual / Engine, Hybrid System / 1ur-fe Engine Control / Sfi System / Secondary Air Injection System Switching Valve "A" Circuit (P0412,P0415)Īir Injection (AIR) system consists of an air pump, the Air Switching
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