change wheel AUDI A4 1998 B5 / 1.G APB Engine Motronic Syst
Page 100 of 166
01-82
      
Actuating Leak Detection Pump (LDP) -V144-  
     
- 
Press button.Output Diagnostic Test Mode EVAP s
ystem leak detection pump
    
Indicated on display  
The change over valve in the LDP is activated for approximately 1 minute 
(clicks), unless the   button pressed to switch to the next actuator.  
Note:  
The clicking can be heard by listening in the area of the left rear wheel 
housing. 
If valve is not actuated (does not click):  
 Repair Manual, Fuel Supply System, Repair Group 20, Components of EVAP system servicing, Checking Leak Detection Pump (LDP) 
-V144
   
Pa
ge 100 of 166 Motronic s
ystem, On Board Dia
gnostic 
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1