wiring diagram AUDI A4 1995 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual

AUDI A4 1995 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual A4 1995 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1045/w960_1045-0.png AUDI A4 1995 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual

Page 26 of 166

AUDI A4 1995 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop 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 29 of 166

AUDI A4 1995 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop 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 44 of 166

AUDI A4 1995 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual 24-34
      
Oxygen Sensor (O2S) heater before 
TWC, checking
 
     
Notes:  
     
Connector for Oxygen Sensor (O2S) heater -
Z19- (bank 1, sensor 1): 4-pin, black. 
     Connector for Oxygen Sensor

Page 51 of 166

AUDI A4 1995 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual 24-39
       If there is no voltage:  
    
If there is still no voltage:  -  Connect multimeter between harness connector terminal 1 (to ECM) 
and vehicle Ground, using VW1594 connector test kit.

Page 55 of 166

AUDI A4 1995 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual Wiring diagram 
     
Test requirements  
     Engine Coolant Temperature (ECT) at least 
80 C (176 F) 
Pa
ge 55 of 166 Motronic Multi
port Fuel In
jection 
(MFI
) and i
gnition s
ystem
11/23/2002 htt

Page 65 of 166

AUDI A4 1995 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual 24-52
      
Oxygen Sensor (O2S) heater behind 
TWC, checking
 
     
Notes:  
     
Connector for Oxygen Sensor (O2S) heater 
(behind TWC) -Z29- (bank 1, sensor 2): 4-pin, 
green 
     Connector for

Page 72 of 166

AUDI A4 1995 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual 24-57
       If there is no voltage:  
    
If there is still no voltage:  -  Connect multimeter between harness connector terminal 1 (to ECM) 
and vehicle Ground, using VW1594 connector test kit.

Page 89 of 166

AUDI A4 1995 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual 24-68
      
Mass Air Flow (MAF) sensor, checking
 
     
Required special tools and test equipment  
     
VAG1551 or VAG1552 Scan Tool (ST) with 
VAG1551/3 adapter cable 
     VAG1598/22 test box

Page 95 of 166

AUDI A4 1995 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual 24-73
      
Checking voltage supply  
    
If there is no voltage:  
Checking wiring   -  Disconnect 3-pin harness connector from Mass Air Flow sensor (MAF).
-  Connect multimeter US1119 (Fluke 83 or

Page 96 of 166

AUDI A4 1995 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual 24-74
      
-  Check wiring for short circuits between terminals 
of 3-pin connector, and between connector and 
ECM/test box. 
     
 
Connector terminal 1 to ECM/test box 
socket 12 
     
 Specifi
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