AUDI A3 2000 8L / 1.G ATW Engine Ignition System Workshop Manual

AUDI A3 2000 8L / 1.G ATW Engine Ignition System Workshop Manual A3 2000 8L / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1077/w960_1077-0.png AUDI A3 2000 8L / 1.G ATW Engine Ignition System Workshop Manual

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AUDI A3 2000 8L / 1.G ATW Engine Ignition System Workshop Manual 28-1
 
     
Ignition system, checking 
     
General notes on ignition system
 
     
Note:  
     
The battery should only be disconnected and 
reconnected when the ignition is turned off, 
since ot

Page 2 of 59

AUDI A3 2000 8L / 1.G ATW Engine Ignition System Workshop Manual 28-2
      
Safety precautions
 
      To reduce the risk of personal injury and/or 
damage to the fuel injection and ignition system, 
always observe the following:  
     
Do not touch or disconnect

Page 3 of 59

AUDI A3 2000 8L / 1.G ATW Engine Ignition System Workshop Manual 28-3
 Technical data
 
Engine identification  
ATW (1.8 L / 5V/ 110 kW engine)  
Idle speed  
Engine speed cannot be adjusted, it is 
regulated by idle stabilization  Front Wheel Drive (FWD): 740 to 8

Page 4 of 59

AUDI A3 2000 8L / 1.G ATW Engine Ignition System Workshop Manual 28-4
 
  
Ignition coils with power output stages, 
checking
 
Special tools and equipment  
 
VAG1526A
 VAG1527B
 VAG1594A
 VAG1598/31
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Page 5 of 59

AUDI A3 2000 8L / 1.G ATW Engine Ignition System Workshop Manual 28-5
      
Test sequence  
     
Note:  
     The ignition coil and power output stage are 
combined in one complete component. 
    
Recognize a non-functional or misfiring cylinder as follows:  
If

Page 6 of 59

AUDI A3 2000 8L / 1.G ATW Engine Ignition System Workshop Manual -  Switch spark plug from faulty cylinder with one from another cylinder.
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AUDI A3 2000 8L / 1.G ATW Engine Ignition System Workshop Manual 28-6
       If malfunction follows the spark plug:  
     
-  Replace spark plug.
      If malfunction remains at original cylinder:  
     
-  Switch ignition coil from faulty cylinder with one 
from

Page 8 of 59

AUDI A3 2000 8L / 1.G ATW Engine Ignition System Workshop Manual 28-7
 
    
If LED does not light up:  
 Electrical Wiring Diagrams, Troubleshooting & Component Locations   
If LED lights up:  
Checking voltage supply  
Test requirement: 
 Electrical Wiring Diagra

Page 9 of 59

AUDI A3 2000 8L / 1.G ATW Engine Ignition System Workshop Manual 28-8
 
    
If specified value is obtained:  
If specified value is not obtained:  -  Connect multimeter for voltage measurement as follows:Harness connector  
Terminal  
Measure to  
1   Engine Groun

Page 10 of 59

AUDI A3 2000 8L / 1.G ATW Engine Ignition System Workshop Manual 28-9
 
    
-  Remove Heater Core E-box cover (arrows).
    
-  Disconnect voltage supply relay -3-.
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