display AUDI A4 1997 B5 / 1.G APB Engine Electronic Engine Power Control Checking Workshop Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 1997, Model line: A4, Model: AUDI A4 1997 B5 / 1.GPages: 39, PDF Size: 0.16 MB
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

24-148
      
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 16 of 39

24-151
      
-  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 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 20 of 39

24-153
      
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. 
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Page 21 of 39

24-154
 Note: 
The engine control module converts the voltage readings from the angle sensors into percentages of 5 V and displays them as percentages. (A signal wire voltage of 5 V is equivalent to 100%.) Read Measuring Value Block 62  
1 
2 
3 
4
    
Indicated on display  
-  Check specified display values for electronic throttle potentiometer 
voltages. 
  
Display fields  
  
1   2   3   4  
Display Group 062: Electronic throttle potentiometer voltages  
Display  
xx %  
xx %   xx %   xx %  
Indicates  
Throttle valve angle  
(angle sensor 1)  Throttle valve angle  
(angle sensor 2)  Accelerator position  
sensor 1  Accelerator position  
sensor 2  
Work Range  
min.: 0 %  
max.: 100 %  min.: 0 %  
max.: 100 %  min.: 0 %  
max.: 100 %  min.: 0 %  
max.: 100 %  
Specified value  
3 - 93 %  
(Idle value: 8 - 18%)  97 - 3 %  
(Idle value: 80 - 90%)  12 - 97 %   4 - 49 %  -  Observe display fields 1 and 2. 
-  Slowly depress accelerator pedal to full throttle position.
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Page 22 of 39

24-155
       The percentage value in display field 1 should 
rise steadily, but without covering the full 
tolerance range between 3 - 93 %.  
      The percentage value in display field 2 should 
also rise steadily but without covering the full 
range of values (in this case 4 - 49 %).  
      If the display values do not appear as described:  
     
-  Check voltage supply and wiring to accelerator 
position senders   Page 24
-163
 . 
      Observe harness connectors for the following: 
Loose connectors, not properly engaged or 
corroded.  
     
       Electrical Wiring Diagrams, Troubleshooting & 
Component Locations        
-  Check accelerator position sensors   Page 24
-
159
 . 
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Page 23 of 39

24-156
      
Notes:  
     
The reason why the value in display field 1 rises 
and the value in display field 2 falls is because 
the potentiometers (angle senders) in the 
throttle valve control module work in opposite 
directions. 
     The percentage value for the first potentiometer 
increases as the voltage rises towards 5 V 
because the voltage at this potentiometer 
increases as the throttle valve opens. 
     The percentage value for the second 
potentiometer decreases as the voltage drops 
away from 5 V and towards 0 V because the 
voltage at this potentiometer decreases as the 
throttle valve opens. 
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Page 27 of 39

24-160
 
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 Measuring 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. 
Read Measuring Value Block 62  
1 
2 
3 
4
    
Indicated on display  
-  Observe specification for electronic throttle potentiometer voltages.
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