Volkswagen Passat 1995 Official Factory Repair Manual page 1400

Secondary Air Injection (AIR) system
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- Disconnect vacuum hose -1- at
Secondary Air Injection (AIR)
solenoid valve -N112- -2-.
- Connect hand vacuum pump
V.A.G1390 at vacuum hose -1- to
combination valve.
- Disconnect pressure hose at
Secondary Air Injection (AIR) pump
motor (arrow) and blow into it with
light pressure.
Combination valve must close.
Note:
To disengage, compress the buttons at
the hose coupling.
- Operate vacuum pump.
Combination valve must open.
If the combination valve does not open
or it is constantly open:
- Replace combination valve
26-14 , item 1 .
- Erase DTC memory of Engine
Control Module (ECM)
26 , Diagnostic mode 4: Reset/erase
diagnostic data.
- Generate readiness code
ST-52 .
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6/12/2004