Passat Sedan 4Motion V6-2.8L (ATQ) (2003)
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Select diagnosis function "08 - Read data block".
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Input 5 on keypad to select "Measuring value block 005".
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Press "Q" on keypad to confirm.
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Observe steering angle sensor reading (arrow).
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With steering wheel centered reading should be approx. 0.0°.
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Turn steering wheel slowly to the left while observing reading.
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Reading should increase smoothly (without skipping or fluctuating)