2000 AUDI A8 display

24-151

Notes:

The reason why the value indicated in display
field 1 climbs, while the value indicated in
display field 2 decreases, has to do with the fact
that the potentiometers (angle sensors) in the
throttle valve control unit run in opposite
directions.
This means that the voltage tap of angle sensor
1 runs from 0 to 5 volts. (The more the throttle
valve is opened, the larger the voltage; percent
indication climbs).
The voltage tap of angle sensor 2 runs from 5
to 0 volts. (The more the throttle valve is
opened, the lower the voltage; the percentage
decreases).
If indications do not resemble description:

- Check voltage supply and wire connections of
throttle valve control module Page 24
-152
.
Pay particular attention to harness connectors
that could be loose or corroded.

- Check accelerator pedal position sensor Page
24
-154
.
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24-155
Both the Throttle Position (TP) sensor -G79- and
the Sender -2- for accelerator pedal position -
G185- are located at the accelerator pedal and
communicate the driver's intentions to the ECM
completely independently of each other. Both
sensors are stored in one housing.

Test sequence

- Connect VAS5051 tester or VAG1551 scan tool
and select the control module for engine
electronics using "address word" 01 Page 01
-
9 .

Ignition must remain switched on for this.Rapid data transfer
HELP
Select function XX

When indicated on display:
- Press buttons -0- and -8- to select "Read Measuring Value Block" and
press -Q- button to confirm input.
Read Measurin
g Value Block
Q
Input display group number XXX

When indicated on display:
- Press buttons -0-, -6- and -2- to select "display group number 062" and
press -Q- button to confirm input.
Read Measuring Value Block 62
1
2
3
4

Indicated on display:
- Check specified values for E-gas potentiometer voltages in display
fields 3 and 4.
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power control
(E-Gas
), checkin
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24-156


Display fields

1 2 3 4
Display group 062: E-Gas potentiometer voltages
Display xx % xx %
xx %
xx %
Indicated Throttle valve angle
(angle sensor 1) Throttle valve angle
(angle sensor 2) Sensor for
Pedal position Sensor 2 for
Pedal position
Functional range 0 to 100 % 0 to 100 %
0 to 100 %
0 to 50 %
Specified value 3 to 93 % 97 to 3 %
12 to 97 %
(Idle value: 8 to 18 %) 4 to 49 %
(Idle value: 3 to 13 %)
Note:
Engine Control Module (ECM) calculates the
voltage values of the angle sensors in percent
relative to 5 volts and displays these percentage
values. (5 volts supply voltage represents 100
%).

- Observe display field 3 and 4.

- Slowly depress accelerator pedal completely.
Percent indication in display field 3 must rise
uniformly. The tolerance range 12 to 97% is not
used completely during this.
Pa
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gine
power control
(E-Gas
), checkin
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11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.FU05.24.5

Percent indication in display field 4 must also rise
uniformly. In the process, the tolerance range of
4 to 49% is not completely utilized.
Pa
ge 31 of 41 Electronic en
gine
power control
(E-Gas
), checkin
g
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.24.5

24-157

Note:
The indicated value in display field 3 must always
be about twice as large as the value in display
field 4.
If indications do not resemble description:

- Check voltage supply and wire connections of
sensor for accelerator pedal position Page
24
-158
.
Pa
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power control
(E-Gas
), checkin
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11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.24.5

24-162

Rapid data transfer
HELP
Select function XX

When indicated on display:
- Press buttons -0- and -4- to select "Initiate basic setting" and press -Q-
button to confirm input.
Basic Setting
Q
Input displa
y group number XXX

When indicated on display:
- Press buttons -0-, -6- and -3- to select "display group number 063" and
press -Q- button to confirm input.
System in Basic Setting 63
1
2
3
4

When indicated on display:
Note:
There will be a prompt: "Activate kick-down"
Note:
During adaptation of the kick down point, the VAG1551 will display "Kick
down ADP in progress". After successful adaptation of the kick down
point, the VAG1551 will display "Kick down ADP OK". - Depress accelerator pedal completely, past kick down point, and hold
down.
- Check specified value in display field 4.
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pair&id=AUDI.B5.FU05.24.5

24-163


Display fields

1 2 3 4
Display group 063: Kick down function, adapting
Display xx % xx %
Kick
down ---
Indicated Sensor 1 for
Pedal
position Sensor 2 for
Pedal
position Kick
down Adaptation condition
Functional
range 0 to 100 % 0 to 50 %
Kick
down operate
ADP in progress
ADP OK
ADP ERROR
Specified value 12 to 97 % 4 to 49 %
Kick
down ADP OK
Notes



If "ADP ERROR." is displayed: Check DTC memory
Page 01
-15
.
Notes:

The abbreviation "ADP" in display field 4 stands for Adaptation.
"ERROR" can be indicated, for example, if the accelerator pedal is not immediately pressed in response to a request by
the tester or if the accelerator pedal is released while adaptation is running despite the fact that adaptation is not yet
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power control
(E-Gas
), checkin
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11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
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pair&id=AUDI.B5.FU05.24.5

24-164
If specified value "ADP OK" is obtained:

-
Press button.Rapid data transfer
HELP
Select function XX

Indicated on display (function selection):
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), checkin
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11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.24.5