AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst A4 1995 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/936/w960_936-0.png AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst

Page 1 of 17

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst 21-1
 
     
Charge air system with 
turbocharger, checking 
     
Notes:  
     
For cleanliness rules, see   Page 21
-44
 .
     
Secure all hose connections with the correct 
hose clips (same as or

Page 2 of 17

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst 21-2
      
Safety precautions
 
      Note the following points if testers and measuring 
instruments have to be used during a road test:  
     
WARNING! 
     
Always attach testers and measuring

Page 3 of 17

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst 21-3
 
  
Connection diagram for charge air control 
and vacuum pressure control 
 
1 - 
Activated charcoal filter (ACF) 
2 - 
EVAP Canister Purge Regulator valve -
N80- 
3 - 
Non return valve for ACF

Page 4 of 17

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst 21-4
 
  
5 - 
Turbocharger 
Check charge pressure   Page 21
-8
6 - 
Combination valve for secondary air inlet 
7 - 
Fuel pressure regulator 
8 - 
To brake servo 
9 - 
Non-return valve 
Between brake

Page 5 of 17

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst 21-5
 
  
11 - 
Non-return valve 
Between brake servo and intake lineNote position (light side/ dark side) as 
shown in Fig; arrow faces in direction of 
flow 
12 - 
Vacuum reservoir Location: In fron

Page 6 of 17

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst 21-6
 
  
15 - 
Non-return valve 
Between ACF container and intake lineNote position (light side/ dark side) as 
shown in Fig; arrow faces in direction of 
flow 
16 - 
From Leak Detection Pump (LDP) -

Page 7 of 17

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst 21-7
 
  
21 - 
Vacuum unit for charge pressure control 
22 - 
Wastegate Bypass Regulator valve -N75- 
Checking  Page 21
-33
23 - 
Mechanical air recirculation valve 
Checking  Page 21
-24
24 - 
Crank

Page 8 of 17

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst 21-8
      
Turbocharger and charge pressure 
regulating valve, checking
 
     
Special tools and equipment  
    
Turbocharger tester VAG 1397 A
    
or  
VAS 5051 with VAS 5051/1VAG 1551 with VAG 1

Page 9 of 17

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst 21-9
      
Test requirements:  
     
Vehicle diagnostic, testing and information 
system VAS 5051 or VAG 1551 Scan Tool 
connected. 
     
       Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Fuel 
Inje

Page 10 of 17

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst Repair Group 01
   
     
Test sequence  
     
WARNING! 
     
Always attach testers and measuring 
instruments to the back seat and have a 
second person operate them from there. 
     If test equip
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