AUDI A4 1998 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Owner's Manual

AUDI A4 1998 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Owner's Manual A4 1998 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1045/w960_1045-0.png AUDI A4 1998 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Owner's Manual

Page 21 of 166

AUDI A4 1998 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Owners Manual 24-16
      
Idle speed, checking
 
     
Notes:  
     
Idle speed, ignition timing and CO-content 
cannot be adjusted. 
     Idle speed is maintained by the Throttle valve 
control module. 
     CO-

Page 22 of 166

AUDI A4 1998 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Owners Manual 24-17
      
Test conditions  
     
Fuses for engine electronics OK 
     No malfunctions stored in DTC memory   
page 01
-16
 
     
Engine Coolant Temperature (ECT) at least 
80 C (176 F) 
     
Al

Page 23 of 166

AUDI A4 1998 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Owners Manual 24-18
      
Checking  
     
-  Connect VAG1551 or VAG1552 scan tool and 
press buttons -0- and -1- to insert "Engine 
Electronics" address word 01 (with engine 
running at idle)   page 01
-8 . 
Rapi

Page 24 of 166

AUDI A4 1998 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Owners Manual 24-19
      
-  Compare display with specified values (display 
fields 1-4): 
  
Display fields  
  
1   2   3   4  
Display group 1: Engine idle speed  
Display   xxxx RPM  
xx.x C  
xx.x%   xx.x %

Page 25 of 166

AUDI A4 1998 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Owners Manual 24-20
       If displayed values are OK (as specified):  
     
- 
Press  button.      
-  Press buttons -0- and -6- to insert "End Output" 
address word 06, and press -Q- button to 
confirm input.

Page 26 of 166

AUDI A4 1998 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Owners Manual 24-21
 Evaluation of display group 1  Display 
Group: 1  
  
  
Display 
field: 1  
Possible malfunction cause  
Corrective action  
less than 
620  
(all-wheel 
drive)  
or  
less than 
740  
(front-

Page 27 of 166

AUDI A4 1998 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Owners Manual or  
greater than 
860  
(front-wheel 
drive)  
  
 
Intake air leaks ("false air")- Check intake air system for leaks   page 24
-
126
 
Pa
ge 27 of 166 Motronic Multi
port Fuel In
jection 
(MFI
) and

Page 28 of 166

AUDI A4 1998 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Owners Manual 24-22
      
Heated Oxygen Sensor (HO2S) and 
Oxygen Sensor (O2S) control before 
TWC, checking
 
     
Notes:  
     
Connector for Heated Oxygen Sensor (HO2S) 
before Three Way Catalytic Converter (

Page 29 of 166

AUDI A4 1998 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Owners Manual Wiring diagram 
     
Test conditions  
     Engine Coolant Temperature (ECT) at least 
80 C (176 F) 
Pa
ge 29 of 166 Motronic Multi
port Fuel In
jection 
(MFI
) and i
gnition s
ystem
11/23/2002 htt
p

Page 30 of 166

AUDI A4 1998 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Owners Manual 24-23
      
Checking  
     
-  Connect VAG1551 or VAG1552 scan tool and 
press buttons -0- and -1- to insert "Engine 
Electronics" address word 01 (with engine 
running at idle)   page 01
-8 . 
Rapi