Additional Information, Functional Description

Secondary Air Injection (AIR) System, Vehicles With Engine Code ATQ

Function

The secondary air system blows air in behind the exhaust valve during the cold start. This produces an oxygen rich exhaust gas, causes after burning and reduces the heating-up phase of the catalytic converter. Activation is triggered by the Motronic Engine Control Module (ECM) -J220- via the Secondary Air Injection (AIR) pump relay -J299- and Secondary Air Injection (AIR) solenoid valve -N112- (change-over valve) to the combi-valve.