check engine AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual A4 1996 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1053/w960_1053-0.png AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual

Page 3 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-2
      
CAUTION! 
     
To operate the engine at starter speed 
without actually starting it (for example, in 
order to test compression), unplug the 
connectors from the output stages for the 
ig

Page 22 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-20
      
Wiring and component check with 
VAG1598/31 test box
 
     
Notes:  
     
The VAG1598/31 test box is designed so it can 
be simultaneously connected to the control 
module wiring harnes

Page 25 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-22
 
    
After installing the engine control module, carry out the following 
operation  
Note:  
At the first learning (adaptation) phase during the "Engine-Basic Setting" 
the engine might run a

Page 26 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-23
      
Procedure after interrupting voltage 
supply
 
     
Note:  
     At the first learning (adaptation) phase during the 
"Engine-Basic Setting" the engine might run a 
little rough at idle

Page 29 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-26
      
Important Note:  
     After installing new engine control module, carry 
out the following operations: 
     - Check DTC memory and erase if necessary   
Page 01
-15
 . 
     - Perform a

Page 31 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-27
      
Idle speed, checking
 
     
Test conditions  
     
No leaks in exhaust system 
     Coolant temperature at least 80 C 
     
Electrical consumers switched off (radiator 
fan must not ru

Page 33 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-28
      
-  Check DTC memory   Page 01
-15
 . The DTC 
memory must be clear. If necessary, repair any 
malfunctions and erase the DTC memory. 
Switch off the engine, then start up again. Take 
veh

Page 34 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-29
 Notes: 
System in Basic Setting 56  
1 
2 
3 
4 
    
Indicated on display: (1 - 4   display zones)  -  Check whether the engine speed shown in display field 1 (actual 
engine speed) is within

Page 35 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-30
      
When the engine is idling the engine control 
module tries constantly to adjust the actual 
engine speed so that it matches the specified 
value. 
     This means that the actual engine s

Page 36 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-31
      
If the idle speed is too high or too low, or if 
the engine does not idle smoothly, and there 
are no malfunctions stored in the DTC 
memory, carry out the following tests 
(marked with d
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