Volkswagen Passat 1995 Official Factory Repair Manual page 1154

Multiport fuel injection and ignition system
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW...
Intake air preheating, checking
Special tools, testers and auxiliary items
Hand vacuum pump VAG 1390
Test conditions
Temperature regulating flap vacuum unit not
leaking
Checking regulating flap
- Remove air cleaner upper section and take out
air filter element.
- Place air cleaner upper section so that
regulating flap in the air cleaner lower section
can be seen.
- Disconnect vacuum hose from temperature
regulator vacuum unit.
- Connect vacuum hose -3- to hand vacuum
pump VAG 1390.
- Operate pump and check freedom of movement
of regulating flap and function of vacuum unit.
Regulating flap must close off cold air intake
1-.
Page 143 of 144
24-127
6/12/2004