wiring diagram AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual A4 1996 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1053/w960_1053-0.png AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual

Page 47 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-40
      
Checking voltage supply  
     
Test conditions 
     
Fuse for injectors OK 
     
       Electrical Wiring Diagrams, Troubleshooting & 
Component Locations   
     
-  Disconnect harnes

Page 48 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-41
      
-  Switch ignition on. The diode test lamp should 
light up. 
     
-  If diode test lamp does not light up, test for open 
circuits in wiring between contact 1 and fuse for 
injectors. I

Page 64 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-54
      
Fuel Pump (FP) relay -J17 and relay 
activation, checking
 
     
Note:  
    
The fuel pump relay is located in the central electrics in the left-hand 
footwell, relay position 4. 
A - C

Page 65 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-55
      
-  If fuel pump relay picks up but diode test lamp 
does not light up, repeat test on other terminal. 
    
 Electrical Wiring Diagrams, Troubleshooting & Component Locations    -  If dio

Page 66 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-56
      
B - Checking voltage supply and activation of 
fuel pump relay  
     
Note:  
     Activation of the fuel pump relay can also be 
tested using the final control diagnosis   Page 
01
-75

Page 68 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-58
      
-  Connect hand-held multimeter between contact 
16 on relay panel and socket 65 on the test box, 
then test wiring for open circuits. 
     
-  Rectify open circuit if necessary.

Page 69 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-59
      
Mass Air FLow (MAF) sensor -G70, 
checking
 
     
Requirements  
     
Coolant temperature at least 80 C (175 F) 
     
Electrical consumers switched off (radiator 
fan must not run duri

Page 72 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-62
      
-  Connect multimeter to terminal 2 of connector 
and engine Ground (GND) for voltage 
measurement. 
     
-  Operate starter briefly.
     
   Specification: approx. battery voltage

Page 75 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-65
      
Voltage supply for Mass Air Flow (MAF) 
sensor, checking (Bosch MAF sensor)  
    
Note:  
Voltage is supplied to Mass Air Flow (MAF) sensor from Fuel Pump (FP) 
relay. 
If there is no ba

Page 83 of 90

AUDI A4 1996 B5 / 1.G APB Engine Motronic Multiport Fuel Injection System Servising Workshop Manual 24-72
      
Checking voltage supply to Mass Air Flow 
(MAF) sensor  
     
-  Disconnect harness connector from air mass 
meter. 
    
Note:  
The mass air flow sensor receives its voltage supply via
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