| After cold starting (coolant temp. +5 ºC ... +35 ºC) the secondary air system injects air behind the exhaust valves, for a period of 100 seconds. This produces an oxygen rich exhaust gas, causes afterburning and reduces the heating-up phase of the catalyst. Activation takes place from the Motronic control unit -J220-, usingsecondary air pump relay -J299-. |
| In later start-ups (to max. 96 ºC engine temp.), the secondary air system will be connected for 10 seconds and will be checked by the self diagnosis. The Lambda regualtion must be activated when this is done. |
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