Volkswagen Passat 1995 Official Factory Repair Manual page 2189

Secondary Air Injection (AIR) system
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.FU08.26.2
Combination valve, checking
Recommended special tools and equipment
V.A.G 1390 hand vacuum pump
Requirements
No leaks in vacuum lines or hose
connections.
Vacuum hoses not clogged or kinked
Pressure hose for Secondary Air Injection
(AIR) Pump Motor not clogged or kinked
Work sequence
Note:
Do not use pressurized air for the following test!
Page 17 of 18
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12/6/2004