audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Restraint Systems > < Vacuum Solenoid Valve HVAC|Description and Operation
Page 1
background image

Vacuum Solenoid Valve HVAC: Testing and Inspection

CHECKING

^ Start engine and let idle.
^ Switch A/C On.
^ Push fresh air/recir (REC) button:

-

both indicator lamps light.

-

fresh air/recirculation flap closes.

-

heater valve closes.

^ If not:

-

check voltage supply to the Two Way Valve using current flow diagram.

-

check vacuum hose routing and operation of vacuum servos.

Restraint Systems > < Vacuum Solenoid Valve HVAC|Description and Operation