S6 V8-4.2L (BBD) (2004)
Throttle Position Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Throttle Position (TP) sensor -G79- and Sender 2 for accelerator pedal position - G185-, checking
Both the Throttle Position (TP) sensors -G79- and the Sender 2 for accelerator position -G185- are located on the accelerator pedal and independently
signal the driver's requirements to the engine control module. Both are located in one housing.
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Connect vehicle diagnostic, testing and information system VAS 5051 or V.A.G 1551 Scan Tool and select engine electronics control module with
"Address word" 01. For this purpose, ignition must be switched on.
Indicated on display
Rapid data transfer
HELP
Select function XX
-
Press keys 0 and 8 for function "Read measured value block" and confirm entry with Q key.
Indicated on display
Reading measured value block
Q
Enter display group number XXX
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Press keys 0, 6 and 2 for "display group number 62" and confirm entry with Q key.
Indicated on display
Read measured value block
62
1
2
3
4
-
Check specifications for electronic throttle potentiometer voltages.
Display Group 62
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Observe readouts in display zones 3 and 4.
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Slowly depress accelerator pedal.
Percentage displayed in zone 3 should rise evenly. Tolerance range from 12...92% is not fully utilized.
Percentage displayed in zone 4 should also rise evenly. Tolerance range from 4...49% is not fully utilized.
NOTE: The value displayed in zone 3 must always be about twice as large as that in zone 4.
If the displays are not as described:
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Check voltage supply and wiring for TP sensor/Sender 2 for accelerator pedal position.
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Adjust TP sensor/Sender 2 for accelerator pedal position.
Checking voltage supply for TP sensor/Sender 2 for accelerator pedal position