AUDI TT 1995 8N / 1.G ATW Engine On Board Diagnostic Workshop Manual

AUDI TT 1995 8N / 1.G ATW Engine On Board Diagnostic Workshop Manual TT 1995 8N / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1079/w960_1079-0.png AUDI TT 1995 8N / 1.G ATW Engine On Board Diagnostic Workshop Manual

Page 1 of 19

AUDI TT 1995 8N / 1.G ATW Engine On Board Diagnostic Workshop Manual 01-1
 
     
On Board Diagnostic (OBD) 
     
On Board Diagnostic (OBD), technical 
data
 
     
Equipment  
     
Data is transmitted between the control module 
and the VAS5051 tester or VAG1551 Sca

Page 2 of 19

AUDI TT 1995 8N / 1.G ATW Engine On Board Diagnostic Workshop Manual 01-2
      
If the ECM recognizes malfunctions that lead to 
a worsening of emissions values, it indicates 
them by lighting the Malfunction Indicator Lamp 
(MIL) -K83- in the instrument cluster. Mean

Page 3 of 19

AUDI TT 1995 8N / 1.G ATW Engine On Board Diagnostic Workshop Manual 01-3
      
Malfunction Indicator Lamp (MIL), 
significance
 
      If the ECM recognizes malfunctions that lead to a 
worsening of emissions values, it indicates them 
by lighting the Malfunction Ind

Page 4 of 19

AUDI TT 1995 8N / 1.G ATW Engine On Board Diagnostic Workshop Manual 01-4
      
Continuously lit: 
      There is a malfunction that causes increased 
emissions. Check DTC memory for Motronic 
ECM and automatic transmission (if installed).  
      Check DTC memory if

Page 5 of 19

AUDI TT 1995 8N / 1.G ATW Engine On Board Diagnostic Workshop Manual 01-5
      
Malfunction Indicator Lamp (MIL), 
checking
 
     
Special tools and equipment  
    
VAG1594A 
    
VAG1598/31 
Pa
ge 5 of 19 On Board Dia
gnostic 
(OBD
)
11/21/2002 htt
p://127.0.0.1:80

Page 6 of 19

AUDI TT 1995 8N / 1.G ATW Engine On Board Diagnostic Workshop Manual 01-6
      
Function test of warning lamp  
     
-  Switch ignition on.
     
 
Exhaust MIL must light up
     
A- Exhaust MIL does not light up  
     
-  Connect VAG1598/31 test box at wiring harne

Page 7 of 19

AUDI TT 1995 8N / 1.G ATW Engine On Board Diagnostic Workshop Manual installing
   
Pa
ge 7 of 19 On Board Dia
gnostic 
(OBD
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.1

Page 8 of 19

AUDI TT 1995 8N / 1.G ATW Engine On Board Diagnostic Workshop Manual 01-7
      
-  Check following wire connection for open circuit 
and short circuit to B+: 
     
Test box  
VAG1598/31  
Socket  
Instrument cluster  
  
Terminal  
47    Electrical Wiring Diagrams,

Page 9 of 19

AUDI TT 1995 8N / 1.G ATW Engine On Board Diagnostic Workshop Manual 01-8
      
B- Exhaust MIL remains constantly lit  
     
-  Check DTC memory of Engine Control Module 
(ECM)  Page 01
-16
 . 
      If no DTCs are stored:  
     
-  Connect VAG1598/31 test box at wi

Page 10 of 19

AUDI TT 1995 8N / 1.G ATW Engine On Board Diagnostic Workshop Manual Locations   
     
-  Repair short circuit if necessary.
      If wire connection is OK:  
     
-  Replace Engine Control Module (ECM)   Page 
24
-23
 
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