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Issues to Identify In Order To Diagnose a Secondary Air Injection System Failure

The secondary air injection system is a system in a vehicle that provides a mass of air into the exhaust system by a blower motor. The purpose of such provision is to ensure the flue gases emitted from the engine are of low concentration in order to reduce air pollution. The system is composed of several parts of the combi valve, which releases the air into the exhaust system. The valve is controlled by the solenoid that is in turn directed by the engine control unit. The engine control unit also controls the relay in the system. The relay operates the blower motor that delivers air into the flue gases in the exhaust. The efficient functioning of the systems enables the right smog test to take place. To get more info, click toyota tundra secondary air injection system. Failure to do so, there is a need to diagnose the problem of each part in order to put it in the correct function. The following are the issues to identify to diagnose the problems.

Before all the diagnostic activity commences, to troubleshoot the problem entirely begins with the checks with the help of a scanner or diagnostic computer. Every problem bears a specific code. Therefore, upon checking it with a computer, it is cleared. In case there is a subsequent reoccurrence of the same code, it means there is the problem and is active. A systematic test follows to ensure every part functions accordingly.

The first issue is to check the vacuum hose in the motor. The failed vacuum hose is the most frequent problem that occurs in the secondary air injection system. The blower motors are typically assembled by the rivets. To get more info, visit toyota tundra secondary air injection system. The rivets can be exposed to a lot of vibrating forces, hence, rendering them loose. That may make the motor to leak and fail to deliver the air as required into the system.

Another problem that may be identified is the motor that has a blown fuse. In a case where the there is much current passing through the system, the fuse tends to disconnect the circuit delivering power to the motor. That makes the blower motor not to be functional, making it unable to deliver air into the exhaust systems.

Finally, another issue to check is whether the combi valves hold the vacuum when the engine is running. The engine sounds require changing under the application of vacuum in the valve. If the problem persists, a vacuum pump is applied to ensure that the solenoid allows the vacuum to pass through when activated. Further problems can be diagnosed by cross-checking the existence of rust in the blower motor. Learn more from

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