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

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A/C refrigerant system, servicing<br />

Página 17 de 51<br />

87-101<br />

-F129- functional checks<br />

To determine proper A/C system performance,<br />

perform the following functional checks with the<br />

switch installed and connected.<br />

- With the engine running, briefly bridge terminal 1<br />

and 2 of connector. If the A/C clutch -N25-<br />

engages, the refrigerant circuit is empty.<br />

- Check refrigerant capacity (fill). If system<br />

pressure is too low (refrigerant leakage), -F129-<br />

switches A/C clutch off.<br />

- Check cooling fan function. When system<br />

pressure increases, -F129- causes coolant fan -<br />

V7- to switch to next higher fan speed.<br />

- Check if A/C system switches off. At excessive<br />

system pressures (e.g.: caused by high ambient<br />

temperatures or if condensor is blocked), -F129-<br />

switches A/C clutch off.<br />

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

13/2/<strong>2005</strong>

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