AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual https://www.carmanualsonline.info/img/6/1064/w960_1064-0.png AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual

Page 1 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual 24-1
 
     
Motronic injection system, 
servicing 
     
Safety precautions
 
      If special testing equipment is required during 
road test, note the following:  
     
WARNING! 
     
Scan tools

Page 2 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual disconnect connector from ignition coils and 
from fuel injectors. 
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Page 3 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual 24-2
      
It is possible that the control module will 
recognize a malfunction and store a DTC during 
some tests. After completing all tests and 
repairs, DTC memory should therefore be 
checked an

Page 4 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual 24-3
      
Rules of cleanliness
 
      When working on the fuel supply or fuel injection 
systems, the following "6 rules of cleanliness" 
should be carefully observed:  
     
Thoroughly clean all

Page 5 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual 24-4
 Technical data
 
Engine identification  
  
ATQ (2.8 L / 5V/ 147 kW-engine)  
Idle speed  
Engine speed cannot be adjusted, it is regulated by idle 
stabilization    
    
720 to 820 RPM (front

Page 6 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual 1) With an engine at normal operating temperature, the resistance of the fuel injectors increases by approx. 4 to 6    
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Page 7 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual 24-5
 
  
Component locations, overview
 
Notes: 
 
Other component Locations   Fig.   7
 , page 
 Page 24
-11
 up to Fig.   12
 , page   Page 
24
-13
 . 
 Component Locations without illustration:
A

Page 8 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual 24-6
 
  
1 - 
4-pin harness connector 
for Oxygen Sensor (O2S) behind Three 
Way Catalytic Converter (TWC) -G130- 
and Oxygen Sensor (O2S) Heater 1 -Z29- 
(bank 1 sensor 2) green
2 - 
4-pin harness c

Page 9 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual 24-7
 
  
5 - 
Secondary Air Injection (AIR) solenoid 
valve -N112- 
6 - 
Intake Air Temperature (IAT) sensor -G42- 
7 - 
4-pin harness connector 
for Heated Oxygen Sensor (HO2S) 2 -
G108- before cata

Page 10 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual 24-8
 
  
10 - 
E-box in plenum chamber 
Motronic Engine Control Module (ECM) -
J220- Secondary Air Injection (AIR) Pump Relay -
J299-  Fig.  10
 , page   Page 24
-12
 
11 - 
Valve -2- for camshaft ad
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