check engine 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 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 13 of 17

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst 21-12
 
Read measured value block 115  
1 
2 
3 
4
    
Note:  
The charge pressure level is measured with turbocharger tester VAG 
1397/A. The vehicle diagnostic, measuring and information system VAS

Page 14 of 17

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst 21-13
 Charge air pressure control malfunctions  Malfunction  
Possible causes  
Charge air pressure below 
specified value  
Wastegate Bypass Regulator valve -N75- faulty  checking,   Page 21
-33
Hos

Page 16 of 17

AUDI A4 1995 B5 / 1.G AWM Engine Charge Air Syst 21-15
      
Leak downstream of exhaust turbocharger  
     
Effect: Charge pressure too low
     
Possible malfunction sources:
     
1 - Connection hoses and line between exhaust 
turbocharger and c