A4 Quattro Wagon L4-1.8L Turbo (ATW) (2000)
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- to select "Read Measuring Value Block" and press -Q- button to confirm input.
When indicated on display
Read measuring value block
Q
Enter display group number XXX
-
Press buttons -0-, -6- and -2- to select "display group number 062" and press -Q- button to confirm input.
Indicated on display
Read Measuring Value Block 62
->
1
2
3
4
-
Check specified values for E-gas potentiometer voltages in display fields 1 and 2.
Display Group 062
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 %)
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Observe display field 1 and 2.
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Slowly depress accelerator pedal completely.
Percent indication in display field 1 must rise uniformly. In the process, the tolerance range of 3 to 93 % is not completely utilized.
Percent indication in display field 2 must decrease uniformly. The tolerance range 97 to 3 % is not used completely during this.
NOTE:
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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.
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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).
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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:
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Check voltage supply and wire connections of throttle valve control module. Pay particular attention to harness connectors that could be loose or
corroded.
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Check accelerator pedal position sensor. See: Throttle Position Sensor/Testing and Inspection
Check voltage supply throttle valve control module
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Pull connector -2- off throttle valve control module.
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Switch ignition on.