engine 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 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 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 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 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 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

Page 11 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual 24-9
 
  
17 - 
Engine Coolant Temperature (ECT) sensor 
-G62- 
for Engine Control Module (ECM)At coolant line behind cylinder head engine 
bank 1 with Engine Coolant Temperature (ECT) 
Sensor -G2- Ch

Page 19 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual 24-17
      
Wire and component test using 
VAG1598/31 test box
 
     
Notes:  
     
VAG1598/31 test box is designed so that it can 
be simultaneously connected to the wiring 
harness at the Engine

Page 21 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual 24-19
 
    
-  Remove Heater Core E-box cover -arrows-.
    
Note:  
Adaptation values are erased when connector is disconnected from the 
Engine Control Module (ECM), DTC memory content remains inta

Page 22 of 78

AUDI A4 2000 B5 / 1.G ATQ Engine Motronic Injection System Servicing Workshop Manual 24-20
 
    
Important note:  
After re-connecting the Engine Control Module (ECM), the following work 
steps must be performed: 
- Check DTC memory and erase it if necessary   Page 01
-15
 . 
- Perfo
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