AUDI A6 1997 C5 / 2.G ATQ Engine Motronic On Board Diagnostic Workshop Manual

AUDI A6 1997 C5 / 2.G ATQ Engine Motronic On Board Diagnostic Workshop Manual https://www.carmanualsonline.info/img/6/1065/w960_1065-0.png AUDI A6 1997 C5 / 2.G ATQ Engine Motronic On Board Diagnostic Workshop Manual

Page 1 of 19

AUDI A6 1997 C5 / 2.G ATQ Engine Motronic On Board Diagnostic Workshop Manual 01-1
 
     
Motronic, On Board 
Diagnostic (OBD) 
     
On Board Diagnostic (OBD), technical 
data
 
     
Equipment  
     
Data is transmitted between the control module 
and the VAS5051 tester or

Page 2 of 19

AUDI A6 1997 C5 / 2.G ATQ Engine Motronic On Board Diagnostic Workshop Manual 01-2
      
If the ECM recognizes malfunctions that lead to 
a degradation of emissions values, it indicates 
them by lighting the Malfunction Indicator Lamp 
(exhaust warning lamp -K83-). Clarificati

Page 3 of 19

AUDI A6 1997 C5 / 2.G ATQ Engine Motronic On Board Diagnostic Workshop Manual 01-3
      
Malfunction Indicator Lamp (MIL), 
significance
 
      If the ECM recognizes malfunctions that lead to a 
degradation of emissions values, it indicates 
them by lighting the Malfunction I

Page 4 of 19

AUDI A6 1997 C5 / 2.G ATQ Engine Motronic On Board Diagnostic Workshop Manual 01-4
      
Malfunction Indicator Lamp (MIL), 
checking
 
     
Special Tools and Equipment  
    
VAG1594A 
    
VAG1598/31 
Pa
ge 4 of 19 Motronic, On Board Dia
gnostic 
(OBD
)
11/23/2002 htt
p://12

Page 5 of 19

AUDI A6 1997 C5 / 2.G ATQ Engine Motronic On Board Diagnostic Workshop Manual 01-5
      
Function test of warning lamp  
     
-  Switch ignition on.
     
 
Warning lamp for On Board Diagnostic 
(Malfunction Indicator Lamp -MIL-) must 
light up 
     
A - Warning lamp for On

Page 6 of 19

AUDI A6 1997 C5 / 2.G ATQ Engine Motronic On Board Diagnostic Workshop Manual        Repair Manual, Electrical Equipment, Repair 
Group 90, Instrument cluster, removing and installing
   
Pa
ge 6 of 19 Motronic, On Board Dia
gnostic 
(OBD
)
11/23/2002 htt
p://127.0.0.1:8080/aud

Page 7 of 19

AUDI A6 1997 C5 / 2.G ATQ Engine Motronic On Board Diagnostic Workshop Manual 01-6
      
-  Check the following wire connection for open 
circuit and short circuit to B+: 
     
Test box  
VAG1598/31  
Socket  
Instrument cluster  
  
Terminal  
47    Electrical Wiring Diagram

Page 8 of 19

AUDI A6 1997 C5 / 2.G ATQ Engine Motronic On Board Diagnostic Workshop Manual 01-7
      
B - Warning lamp for On Board Diagnostic 
(Malfunction Indicator Lamp -MIL-) remains lit 
constantly  
     
-  Check DTC memory of Engine Control Module 
(ECM)  Page 01
-15
 . 
      If n

Page 9 of 19

AUDI A6 1997 C5 / 2.G ATQ Engine Motronic On Board Diagnostic Workshop Manual Troubleshooting & Component 
Locations binder   
     
-  Repair short circuit if necessary.
      If wire connection is OK:  
     
-  Replace Engine Control Module (ECM)   Page 
24
-21
 . 
Pa
ge 9 o

Page 10 of 19

AUDI A6 1997 C5 / 2.G ATQ Engine Motronic On Board Diagnostic Workshop Manual 01-8
      
Safety precautions
 
      If special testing equipment is required during 
road test, note the following:  
     
WARNING! 
     
Scan tools and testing devices must always 
be secured on
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