AUDI A4 1999 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual

AUDI A4 1999 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual A4 1999 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1045/w960_1045-0.png AUDI A4 1999 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual

Page 161 of 166

AUDI A4 1999 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual 24-124
      
Leak Detection Pump (LDP), checking
 
     
Note:  
     Component locations   page 24
-1  
     
Electrical testing  
    
If resistance is NOT OK:  -  Disconnect harness connector for

Page 162 of 166

AUDI A4 1999 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual 24-125
      
Voltage supply, checking  
    
If LED tester does not light:  -  Disconnect harness connector for LDP -V144-.
-  Connect VAG1527B LED voltage tester between connector terminal 3 
(B+) a

Page 163 of 166

AUDI A4 1999 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual 24-126
      
Intake air system, checking for leaks
 
     
Required special tools and test equipment  
     
VAG1551 or VAG1552 Scan Tool (ST) with 
VAG1551/3 adapter cable 
     Engine leak detector

Page 164 of 166

AUDI A4 1999 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual -  Press buttons -0- and -8- to select "Read Measuring Value Block" 
function 08, and press -Q- button to confirm input. 
Read Measuring Value Block 
HELP
Input displa
y group number XXX
    
Indicate

Page 165 of 166

AUDI A4 1999 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual 24-127
 
Read Measuring Value Block 1 1 2 3 4 
    
Indicated on display (1-4 = display fields)  
-  Monitor oxygen sensor control in display fields 3 and 4.
  
Display fields  
  
1   2   3   4  
Dis

Page 166 of 166

AUDI A4 1999 B5 / 1.G AHA Engine Multiport Fuel Injection And Ignition System Workshop Manual If engine speed drops, or the values displayed for oxygen sensor control change:  
-  Check for leaks in area of intake air system most recently sprayed, and eliminate leaks.
Pa
ge 166 of 166 Motronic
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