AUDI A4 2000 B5 / 1.G APB Engine Electronic Engine Power Control Checking User Guide
Manufacturer: AUDI, Model Year: 2000, Model line: A4, Model: AUDI A4 2000 B5 / 1.GPages: 39, PDF Size: 0.16 MB
Page 11 of 39

24-146
      
Throttle valve control module, 
adaptation
 
      The adaptation process enables the Engine 
Control Module (ECM) to learn the different 
positions of the throttle valve with the ignition 
switched on and the engine not running. These 
positions are stored in the control module. The 
feedback signal indicating the position of the 
throttle valve comes from the two angle sensors 
for throttle valve drive.  
      If the Throttle Valve Control Module -J338 or the 
ECM is removed and installed or replaced, or if 
the voltage (power) supply to the ECM is 
interrupted, an adaptation must be carried out.  
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Page 12 of 39

24-147
       The learning process (adaptation process) is 
carried out:  
     
By selecting "Basic Setting" (function 04), 
Display Group 060 with the ignition switched 
on. 
     Automatically if the ignition is switched on for at 
least 6 seconds without operating the starter or 
depressing the accelerator, and if the Engine 
Control Module (ECM) registers a "learning 
requirement." (In this case, however, there is no 
way of knowing whether the adaptation process 
was successful or not.) The engine control 
module will register a learning requirement if 
the previously stored voltage readings from the 
angle sensors do not correspond (within a 
certain tolerance range) to the new voltage 
readings. 
     
Note:  
     The engine will not start during automatic 
adaptation. 
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Page 13 of 39

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Test conditions for adaptation of throttle 
valve control module  
     
No malfunctions stored in DTC memory   
Page 01
-15
 , check DTC memory 
     
Engine not running, ignition switched on 
     Accelerator pedal not depressed 
     Coolant temperature between 5 C and 
100 C (Display group 004, display field 3) 
     
Intake air temperature less than 100 C 
     
Voltage supply to engine control module 
greater than 11Volt, Checking   Page 28
-32
     
-  Connect vehicle diagnostic, testing and 
information system VAS 5051 or VAG1551 scan 
tool and select engine electronics control 
module by entering address word "01"   Page 
01
-9 . When doing this the ignition must be 
switched on. 
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Page 14 of 39

24-149
 
Rapid data transfer 
HELP
Select function XX
    
Indicated on display  
-  Press buttons -0- and -4- to select function "Basic Setting" and confirm 
entry with -Q- button. 
Basic Setting Input displa
y group number 
XXX
    
Indicated on display  
-  Press buttons -0-, -6- and -0- to select "display group number 060" and 
confirm entry with -Q- button. 
System in Basic Setting 60  
1 
2 
3 
4
    
Indicated on display  
-  Check specification for throttle valve control module in display field 4 
Page 24
-151
 
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Page 15 of 39

24-150
       When the -Q- button is pressed the throttle valve 
positioner will be switched mechanically.  
      In this condition the throttle valve is pulled into an 
"emergency running" or default position by a 
mechanical spring in the throttle valve control 
module. The values supplied by the two angle 
sensors for this emergency running position are 
stored in the Engine Control Module (ECM).  
      The throttle valve is then opened by a 
predetermined amount. As soon as it reaches 
this position the current supply to the throttle 
valve positioner is again disconnected. The 
spring should then close the throttle valve 
mechanically to the previously learned default 
position within a specified period of time (spring 
test).  
      The throttle valve positioner then closes the 
throttle valve and the values supplied by the 
angle sensors in the throttle valve control module 
are stored in the Engine Control Module (ECM).  
      If the ECM disconnects the current supply to the 
throttle valve positioner while the vehicle is being 
driven, the result will be an increase in idling 
speed with fluctuating engine RPM (hunting) and 
very slow throttle response.  
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Page 16 of 39

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-  Check specification for throttle valve control 
module (display fields 4). 
  
Display fields  
  
1   2   3   4  
Display Group 060: Adaptation of throttle valve control module with ignition on  
Display   xx %   xx %  
---  
---  
Indicates  Throttle 
valve angle  
(angle 
sensor 1)  Throttle 
valve angle  
(angle 
sensor 2)  Learning stage counter  
Adaptation status  
Work 
Range  min.: 0 %  
max.: 100 
%  min.: 0 %  
max.: 100 
%  0 to 8  
ADP. runs  
ADP. O.K.  
ADP. ERROR  
Specified 
value  3 - 20 %   80 - 97 %  
8  
ADP. OK  
Note        
Learning stage counter must run from 0 to 8 
during adaptation process (some digits may 
also skip).  If specification is not met: 
Notes  Page 24
-152
 .  
Note:  
 
It is not important how the learning stage counter reacts during adaptation, rather the specification "ADP" is reached after 
the adaptation in display field 4. 
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Page 17 of 39

 The Abbreviation "ADP" stands for adaptation.
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Page 18 of 39

24-152
      
Note:  
     If the adaptation process is interrupted by the 
control unit, the cause could be one of the 
following: 
     
The throttle valve is unable to close completely 
(e.g. because of dirt). 
     The harness connectors (e.g.: at throttle valve 
control module) are loose, not properly 
connected or the contacts at the connector are 
corroded or bent. 
     Battery voltage too low.
     Throttle valve control module or wiring is 
faulty. 
     The engine was started or the accelerator pedal 
was depressed during the adaptation process. 
     Distortion of throttle valve housing (check bolts: 
10 Nm) 
     When the adaptation process is interrupted the 
message "Function is unknown or cannot be 
carried out at the moment" will appear on the 
fault reader display. The adaptation process will 
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Page 19 of 39

start again automatically the next time the 
ignition is switched on (for several seconds). 
     
- 
End engine basic setting by pressing the  
button. 
     
-  Press buttons -0- and -6- to select "End Output" 
function and confirm input with -Q- button. 
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Page 20 of 39

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Angle sensor -1- for throttle drive 
(power accelerator actuation) -G187- 
and angle sensor -2- for throttle drive 
(power accelerator actuation) -G188, 
checking
 
      The angle sensor -1- for throttle drive (power 
accelerator actuation) -G187 and angle sensor -
2- for throttle drive (power accelerator actuation) 
-G188 inform the engine control module of the 
position of the throttle valve. Both angle sensors 
are located in the throttle valve control module.  
     
-  Connect vehicle diagnostic, testing and 
information system VAS 5051 or VAG1551 scan 
tool and select engine electronics control 
module by entering address word "01"   Page 
01
-9 . When doing this the ignition must be 
switched on. 
Rapid data transfer 
HELP
Select function XX
    
Indicated on display  
-  Press buttons -0- and -8- to select function "Read Measuring Value 
Block" and confirm entry with -Q- button. 
Read Measurin
g Value Block 
Q
Input displa
y group number 
XXX
    
Indicated on display  
-  Press buttons -0-, -6- and -2- to select "display group number 062" and 
confirm entry with -Q- button. 
Pa
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gine Power Control 
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e=re
pair&id=AUDI.B5.FU04.24.4