14.02.2016 Views

Bentley Volkswagen.Golf.Jetta.R32.Official.Factory.Repair.Manual.1999-2005

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Secondary air system<br />

Página 1 de 35<br />

26-23<br />

Secondary air system<br />

CAUTION!<br />

When performing repair work, especially due<br />

to the confined conditions in the engine<br />

compartment, pay attention to the following:<br />

Route all types of lines (e.g. for fuel,<br />

hydraulics, EVAP system, coolant,<br />

refrigerant, brake fluid and vacuum) as well<br />

as electrical wiring so that the original<br />

positions are restored.<br />

Ensure sufficient clearance to all moving or<br />

hot components.<br />

Function<br />

During cold starting the secondary air system<br />

blows air in behind the exhaust valves. This<br />

produces an oxygen rich exhaust gas, causes<br />

afterburning and reduces the heating-up phase<br />

of the catalytic converter. Activation is performed<br />

by the Motronic Engine Control Module -J220-<br />

via the Secondary Air Injection (AIR) pump relay<br />

-J299- to the combi-valve.<br />

Checking secondary air system Page 26-31 .<br />

http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=...<br />

12/2/<strong>2005</strong>

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!