display AUDI A4 2000 B5 / 1.G APB Engine Electronic Engine Power Control Checking Workshop Manual
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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

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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gine Power Control
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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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gine Power Control
(EPC
), checkin
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play?action=Goto&t
yp
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pair&id=AUDI.B5.FU04.24.4
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.
Pa
ge 27 of 39 Electronic En
gine Power Control
(EPC
), checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.24.4