AUDI A3 1995 8L / 1.G AEB ATW Engines Vacuum Control System Workshop Manual

AUDI A3 1995 8L / 1.G AEB ATW Engines Vacuum Control System Workshop Manual A3 1995 8L / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/959/w960_959-0.png AUDI A3 1995 8L / 1.G AEB ATW Engines Vacuum Control System Workshop Manual

Page 1 of 8

AUDI A3 1995 8L / 1.G AEB ATW Engines Vacuum Control System Workshop Manual 21-38
 
     
Vacuum control system 
(engine code ATW) 
     
Notes:  
     
Observe rules for cleanliness   Page 21
-39
 
     
Observe safety precautions   Page 21
-40
 
     
Always replace gaskets

Page 2 of 8

AUDI A3 1995 8L / 1.G AEB ATW Engines Vacuum Control System Workshop Manual 21-39
      
Rules of cleanliness
 
      When working on the vacuum control system, 
charge air pressure regulation or at the 
secondary air system hoses, always observe the 
following rules of clean

Page 3 of 8

AUDI A3 1995 8L / 1.G AEB ATW Engines Vacuum Control System Workshop Manual 21-40
      
Safety precautions
 
      If special testing equipment is required during 
test drive, note the following:  
     
   Do not operate test and measuring equipment 
from the passenger seat

Page 4 of 8

AUDI A3 1995 8L / 1.G AEB ATW Engines Vacuum Control System Workshop Manual 21-41
 
  
Charge air pressure regulation and 
secondary air system vacuum control 
system
 
1 - 
EVAP canister 
2 - 
From fuel tank 
3 - 
Evaporative Emission (EVAP) canister 
purge regulator valve -

Page 5 of 8

AUDI A3 1995 8L / 1.G AEB ATW Engines Vacuum Control System Workshop Manual 21-42
 
  
6 - 
Turbocharger 
Check charge air pressure   Page 21
-54
7 - 
Combination valve for secondary air 
injection (AIR) 
8 - 
Fuel pressure regulator 
9 - 
To power brake booster 
10 - 
Check

Page 6 of 8

AUDI A3 1995 8L / 1.G AEB ATW Engines Vacuum Control System Workshop Manual 21-43
 
  
14 - 
Distributor piece 
15 - 
Check valve 
Installation position (light/dark side): Arrow 
points in direction of flow, as shown 
16 - 
Secondary Air Injection (AIR) solenoid 
valve -N112-

Page 7 of 8

AUDI A3 1995 8L / 1.G AEB ATW Engines Vacuum Control System Workshop Manual 21-44
 
  
20 - 
Check valve 
Installation position (light/dark side): Arrow 
points in direction of flow, as shown 
21 - 
Charge air cooler With charge air pressure sensor -G31-
22 - 
Throttle valve

Page 8 of 8

AUDI A3 1995 8L / 1.G AEB ATW Engines Vacuum Control System Workshop Manual 21-45
 
  
25 - 
Pressure unit for charge air pressure 
regulation 
26 - 
Wastegate bypass regulator valve -N75- 
27 - 
Mechanical recirculation valve 
Checking  Page 21
-46
28 - 
Pressure control val