AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Owner's Guide

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Owner's Guide A4 2000 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1064/w960_1064-0.png AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Owner's Guide
Trending: sensor, check engine, relay, display, oil pressure, ignition, fuel

Page 31 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Owners Guide 24-28
      
Notes:  
     
Engine speed in display field 1 (actual engine 
speed) is the current engine speed. 
     Engine speed in display field 2 (specified 
engine speed) is a theoretical engine

Page 32 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Owners Guide -  If DTC memory was erased, readiness code must be re-generated   
Page 01
-82
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play?actio

Page 33 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Owners Guide 24-29
      
If idle speed is too high or low and there are 
no DTCs in DTC memory, the following tests 
(marked with dots) must be performed:  
     
False air in intake air system, checking   
Page

Page 34 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Owners Guide 1 = selector lever in 2/3/4/D/R  
      0         A/C readiness maximum heating/cooling power  
   0            Indication always 0  
0               Indication always 0  
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Page 35 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Owners Guide 24-30
      
Fuel pressure regulator and residual 
pressure, checking
 
     
Note:  
     Fuel pressure regulator regulates fuel pressure 
according to intake manifold pressure. This 
ensures that th

Page 36 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Owners Guide 24-31
      
WARNING! 
     
Fuel system is under pressure! Place a cloth 
around the connection point before opening 
system. Then release pressure by carefully 
loosening connection point. 
    
Che

Page 37 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Owners Guide 24-32
      
- Measure fuel pressure.
     
 
Specification: 3.8 to 4.2 bar
     
-  If the specified value is not reached, replace 
pressure regulator on a trial basis and repeat 
pressure test.

Page 38 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Owners Guide etc.). 
     
-  Connect vacuum hose at pressure regulator 
while observing pressure drop at pressure 
gauge. 
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Page 39 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Owners Guide 24-33
      
-  Fuel pressure must drop by approx. 0.5 bar 
when connecting the vacuum hose. 
     
   If the pressure change does not occur, the 
following tests must be performed: 
     
 
Check vac

Page 40 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Owners Guide      
Note:  
     Pressure increase for an engine at operating 
temperature limited by the fuel expansion is 
normal. 
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Trending: fuel, ABS, checking oil, ignition, wiring, remote control, display