Leon Mk2
| functioning |
| t | During the cold run phase, the engine control unit -6- agitates the secondary air pump -1- via the secondary air injection relay -5-. The air reaches the combined secondary air injection valve -3-. |
| t | At the same time, the secondary air inlet valve -8- is actuated, thus allowing vacuum to reach the combination valve for the secondary air system -3-. In this way, the combination valve for the secondary air system permits passage of secondary air to the exhaust ports in the cylinder head. |
