audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Sensors and Switches - Emission Control Systems > < OXS System - Checking Procedure|Page 2531
Page 4
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squeeze pump handle several times to compress diaphragm in pressure gradient switch

FIGURE 4

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release vacuum by pressing lever (arrow as in Fig. 4)

^

when releasing vacuum, ohmmeter should go to zero ohms for a short time and go back again to infinity ohms

If NO, replace pressure gradient switch.

Sensors and Switches - Emission Control Systems > < OXS System - Checking Procedure|Page 2531