AUDI A4 1995 B5 / 1.G APB Engine Ignition System Checking

AUDI A4 1995 B5 / 1.G APB Engine Ignition System Checking A4 1995 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1052/w960_1052-0.png AUDI A4 1995 B5 / 1.G APB Engine Ignition System Checking
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Page 11 of 64

AUDI A4 1995 B5 / 1.G APB Engine Ignition System Checking -  Switch ignition off.
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Page 12 of 64

AUDI A4 1995 B5 / 1.G APB Engine Ignition System Checking 28-10
 
    
Check the following wiring connections for open circuits and/or short to B+ 
or Ground (GND).  
Black 3-pin connector on power 
output stage, terminal  
3-pin connector on ignition 
coil,

Page 13 of 64

AUDI A4 1995 B5 / 1.G APB Engine Ignition System Checking 28-11
      
Power output stages for ignition coils, 
checking
 
     
Note:  
     
Power Output Stage -N122 (black connector) 
activates the ignition coils for cylinder bank 1 
(cylinders 1 to 3).

Page 14 of 64

AUDI A4 1995 B5 / 1.G APB Engine Ignition System Checking 28-12
      
-  Disconnect 4-pin harness connectors on power 
output stages Component locations overview,   
Page 24
-5 . 
    
-  Connect diode test lamp VAG1527 in turn to the following contacts on

Page 15 of 64

AUDI A4 1995 B5 / 1.G APB Engine Ignition System Checking 28-13
       If the specifications are not obtained:  
     
-  Switch ignition off.
     
-  Connect test box VAG 1598/31 to wiring 
harness for engine control module. Do not 
connect to the engine c

Page 16 of 64

AUDI A4 1995 B5 / 1.G APB Engine Ignition System Checking 28-14
      
-  Rectify any open/short circuit as necessary.
      If no wiring malfunction is detected:  
     
-  Connect 4-pin connectors to power output 
stages. 
     
-  Disconnect 3-pin connect

Page 17 of 64

AUDI A4 1995 B5 / 1.G APB Engine Ignition System Checking 28-15
       If the diode test lamp does not flash when testing 
one or more of the contacts:  
      Check the Ground (GND) connections for the 
power output stages as follows:  
     
-  Disconnect

Page 18 of 64

AUDI A4 1995 B5 / 1.G APB Engine Ignition System Checking 28-16
      
-  If diode test lamp does not light up, test for open 
circuit in wiring using wiring diagram. 
     
       Electrical Wiring Diagrams, Troubleshooting & 
Component Locations

Page 19 of 64

AUDI A4 1995 B5 / 1.G APB Engine Ignition System Checking 28-17
      
Intake Air Temperature (IAT) sensor -
G42, checking
 
      Location of sensor and connector   Page 24
-5 .  
     
-  Connect vehicle diagnostic, testing and 
information system VAS 5051

Page 20 of 64

AUDI A4 1995 B5 / 1.G APB Engine Ignition System Checking 28-18
 
  
Display fields  
  
1   2   3   4  
Display Group 004: Intake air temperature with engine idling  
Display   xxxx rpm   xx.xxx V  
xxx.x C  
xxx.x C  
Indicates   Engine speed   Battery vol
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