seat Workshop Repair Guides

SEAT Workshop Service and Repair Manuals

Removing and installing parts of secondary air system > < Checking combination valve
Secondary air system: engine code AWC
Secondary air system: engine code AWC
Function
During a cold start, air is blown in behind the exhaust valve by the secondary air system. This produces an oxygen-rich exhaust gas, causing afterburning and reducing the heat-up phase of the catalytic converter. The activation is initiated by the Motronic control unit -J220- via secondary air pump relay -J299- to combination valve.
   

Removing and installing parts of secondary air system > < Checking combination valve