Operation CHARM: Car repair manuals for everyone.

General Information






Secondary Air Injection System


When doing any repair work, especially in the engine compartment, pay attention to the following due to clearance issues:

Route lines of all types (for example, fuel, hydraulic, Evaporative Emission (EVAP), coolant, refrigerant, brake fluid and vacuum) and electrical wiring so that the original path is followed.

To prevent damage to the lines, make sure there is sufficient clearance to all moving or hot components.

Function

Air is blown briefly into the exhaust valves by the Secondary Air Injection (AIR) system during a cold start. This produces an oxygen rich exhaust gas, causes after burning and reduces the heating-up phase of the catalytic converter.