AUDI A3 1995 8L / 1.G AEB ATW Engines Charge Air System With Turbocharger Owner's Manual

AUDI A3 1995 8L / 1.G AEB ATW Engines Charge Air System With Turbocharger Owner's Manual A3 1995 8L / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/952/w960_952-0.png AUDI A3 1995 8L / 1.G AEB ATW Engines Charge Air System With Turbocharger Owner's Manual

Page 21 of 42

AUDI A3 1995 8L / 1.G AEB ATW Engines Charge Air System With Turbocharger Owners Manual 21-62
      
-  Initiate output Diagnostic Test Mode (DTM) and 
activate the wastegate bypass regulator valve -
N75-. 
     
       Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel 
Injection & Ignition,

Page 22 of 42

AUDI A3 1995 8L / 1.G AEB ATW Engines Charge Air System With Turbocharger Owners Manual 21-63
       If specified value is not obtained:  
     
-  Replace wastegate bypass regulator valve -N75-
. 
      If the specified value is met:  
     
Checking voltage supply  
    
If LED does no

Page 23 of 42

AUDI A3 1995 8L / 1.G AEB ATW Engines Charge Air System With Turbocharger Owners Manual 21-64
       If wire connection is OK:  
     
-  Check Fuel Pump (FP) relay:
     
       Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel 
Injection & Ignition, Repair Group 24         If LED lights:

Page 24 of 42

AUDI A3 1995 8L / 1.G AEB ATW Engines Charge Air System With Turbocharger Owners Manual 21-65
 
    
If wire connection is OK:  
 Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel Injection & Ignition, 
Repair Group 24    -  Check the following wire connection for open circuit and short circ

Page 25 of 42

AUDI A3 1995 8L / 1.G AEB ATW Engines Charge Air System With Turbocharger Owners Manual 21-66
 
  
Charge air pressure sensor -G31-, 
checking
 
Special tools and equipment  
 
VAG1526A
 VAG1594A
 VAG1598/31
 VAS5051 with VAG5051/1
- or 
 VAG1551 with VAG1551/3A
Pa
ge 25 of 42 Char
ge ai

Page 26 of 42

AUDI A3 1995 8L / 1.G AEB ATW Engines Charge Air System With Turbocharger Owners Manual 21-67
      
Note:  
     The charge air pressure sensor -G31- and wire 
connections are monitored by the Engine Control 
Module (ECM). 
     
-  Connect VAS5051 tester or VAG1551 scan tool 
and selec

Page 27 of 42

AUDI A3 1995 8L / 1.G AEB ATW Engines Charge Air System With Turbocharger Owners Manual     
-  Connect multimeter between terminals 1 and 3 of harness connector 
for voltage measurement. 
Pa
ge 27 of 42 Char
ge air s
ystem with turbochar
ger 
(en
gine code ATW
)
11/18/2002 htt
p://127.0

Page 28 of 42

AUDI A3 1995 8L / 1.G AEB ATW Engines Charge Air System With Turbocharger Owners Manual 21-68
      
-  Switch ignition on.
     
 
Specified value: approx. 5 V
      If specified value is not obtained:  
    
 Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel Injection & Ignition, 
Repair G

Page 29 of 42

AUDI A3 1995 8L / 1.G AEB ATW Engines Charge Air System With Turbocharger Owners Manual 21-69
      
Checking signal wire  
     
-  Connect harness connector at charge air 
pressure sensor. 
     
-  Connect multimeter to socket 101 and socket 
108 of test box for voltage measurement.

Page 30 of 42

AUDI A3 1995 8L / 1.G AEB ATW Engines Charge Air System With Turbocharger Owners Manual If wire connection is OK:  
-  Replace charge air pressure sensor -G31-.
Pa
ge 30 of 42 Char
ge air s
ystem with turbochar
ger 
(en
gine code ATW
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
p
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