DESCRIPTION
The air injection system consists of air line from air cleaner which enters exhaust system at the front catalytic converter. Mounted in this line is a pulse air feeder that consists of main and sub reed valves. This system supplies secondary air into exhaust manifold to promote oxidation of exhaust emissions.
OPERATION
The reed valve is actuated by exhaust vacuum being generated from pulsation in the exhaust manifold. Extra air is supplied into the exhaust manifold through secondary air control valve. The secondary air control valve is opened by the intake manifold pressure when the solenoid valve is energized by the ECU based on the information on coolant temperature, engine speed and idle position.
Pulse Air Injection System (Turbocharged Models). Scheme 9
Pulse Air Injection System (Cordia, Galant, Mirage, California Montero & Tredia). Scheme 10
SYSTEM TESTING
Check air lines, filter element and reed valves for cracks, clogging, damage and leaks. Replace if defective. Start engine and run at idle. Disconnect air hose at inlet side of reed valve. If suction is felt at inlet side of reed valve, valve is good. No exhaust emissions should be blown from inlet side of valve. Replace valve if defective.