check engine AUDI A6 1996 C5 / 2.G ATQ Engine Electronic Engine Power Control Checking User Guide
[x] Cancel search | Manufacturer: AUDI, Model Year: 1996, Model line: A6, Model: AUDI A6 1996 C5 / 2.GPages: 41, PDF Size: 0.21 MB
Page 15 of 41

24-144
Procedure
- 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 -4- to select "Initiate basic setting" and press -Q-
button to confirm input.
Basic Settin
g
Q
Input display group number XXX
When indicated on display:
After pressing Q-button, throttle valve actuator will be switched on without
current.
In this condition, the throttle valve will be drawn into an emergency
position by a mechanical spring, which is located in the throttle valve
control module. The values supplied by the two angle sensors in this
emergency position are stored by the Engine Control Module (ECM). - Press buttons -0-, -6- and -0- to select "display group number 060" and
press -Q- button to confirm input.
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Page 16 of 41

24-145
Next, the throttle valve is opened by a certain
value. If this value is reached, the throttle valve
actuator is once again de-energized. Now, the
mechanical spring must close the throttle valve to
the previously learned emergency position within
a specified time (spring test).
Then, the throttle valve is closed by the throttle
valve actuator; the values supplied by the angle
sensors in the throttle valve control unit are
stored by the Engine Control Module (ECM).
If Engine Control Module (ECM) should de-
energize throttle valve actuator during driving
operation, this is expressed by an increased,
surging idle speed (RPM). The engine accepts
gas only after great delay. System in Basic Setting 60
1
2
3
4
When indicated on display:
- Check specified values for throttle valve control module in display fields
3 and 4.
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Page 19 of 41

24-147
Note:
The control module can abort adaptation for the
following reasons:
Throttle valve cannot be closed completely (e.g.
contamination)
Battery voltage is too low.
Throttle valve control module or wire connection
is faulty.
Engine is started during adaptation or
accelerator pedal is operated.
Tension of throttle valve housing (check
bolts)
After termination, tester displays "Function is
unknown or cannot be performed at the
moment". The next time the ignition is switched
on (several seconds), adaptation will be
automatically repeated.
- End basic adjustment of the engine by pressing
the key.
Rapid data transfer
HELP
Indicated on display (function selection):
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Page 22 of 41

24-149
Angle sensor 1 for throttle drive (power
accelerator actuation) -G187- and angle sensor 1
for throttle drive (power accelerator actuation) -
G188- inform the Engine Control Module (ECM)
about the position of the throttle valve. Both
angle sensors are located in the throttle valve
control module.
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 Measuring Value Block
Q
Input displa
y 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 1 and 2.
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Page 23 of 41

24-150
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
Specified value
3 to 93 %
(Idle value:
8 to 18 %) 97 to 3 %
(Idle value:
80 to 90 %) 12 to 97 % 4 to 49 %
Specified value
3 to 93 %
97 to 3 % 12 to 97 % 4 to 49 %
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 1 and 2.
- Slowly depress accelerator pedal completely.
Percent indication in display field 1 must rise
uniformly. The tolerance range of 3 to 93% will
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Page 26 of 41

24-152
Check voltage supply throttle valve control
module
- Pull connector (2) off throttle valve control
module.
- Switch ignition on.
If specified values are not obtained:
Check wire connections from Engine Control Module (ECM) to throttle
valve control module Page 24
-153
. - Connect multimeter to the following connector terminals for voltage
measurement:
Harness connector
Terminal
Specified value
2 + Ground (GND) about 5 V
2 + 6 about 5 V
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Page 29 of 41

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
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Page 30 of 41

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.
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Page 34 of 41

If specified values are not obtained: - Also check signal wires.
- Check wire connections from Engine Control Module (ECM) to sensors
for accelerator pedal position.
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Page 37 of 41

24-161
Kick down function, adapting
If the sensor for accelerator pedal position or the
Engine Control Module (ECM) is replaced on a
vehicle with automatic/variable transmission, the
kick down function must be learned by the ECM.
Special Tools and Equipment
Requirements
Procedure
VAS5051 with VAG5051/1
orVAG1551 with VAG1551/3BNo DTCs in DTC memory, check DTC memory Page 01
-15
.
Engine not running, ignition switched on.
- 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.
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
yp
e=re
pair&id=AUDI.B5.FU05.24.5