Audi Workshop Service and Repair Manuals

The navigation system must be re-calibrated following each tyre change (if permanent length defects are determined) or each replacement of the navigation system control unit (-J401).
Otherwise the navigation system operates on the basis of an approximate travel measurement which can only be calibrated by the control unit after a distance of approx. 100 km.

The standard tyres are re-calibrated using a simple selection process.
Second-hand or special tyres are re-calibrated on completion of a specified distance.

• ‒ Invoking customer service software .
• ‒ → Select the menu item "SET WHLS" with the cursor keys.

Display:

• ‒ Confirm the selection with the "ENTER" key.

Display:

• ‒ Press "ENTER" key to continue.

Display:

• ‒ Confirm the selection with the "ENTER" key.

Display:

• ‒ Confirm the selection with the "ENTER" key.

Display:

Select tyre condition using cursor keys.

• ‒ In the case of new tyres, select menu item "NEW" and confirm selection with the "ENTER" key.

Reading on display => Page 91-165:

• ‒ In the case of used tyres, select menu item "USED" and confirm selection with the "ENTER" key.

Reading on display => Page 91-168:

New tyres:

Display:

• ‒ Press "ENTER" key to continue.

Display:

• ‒ Use cursor keys to select tyre type for current vehicle from menu and confirm selection with "ENTER" key.

Possible tyre sizes => Tyre table, Page 91-166

Tyre table:

Note:

For special tyre types, select the menu item "SPECIAL".

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Example of display:

• ‒ If the tyre type has been correctly selected, confirm the selection "YES" with "ENTER" and complete wheel calibration.
• ‒ If the wrong tyre type has been selected, select menu item "NO", confirm with "ENTER" and reselect tyre type.

Used tyres or special tyres:

Calibration requirements:

• ◆ Determine a fortified driving route measuring 100 to 120 m. Measure the starting and finishing points beforehand with a steel measuring tape and mark.
  The route should be marked permanently (e.g. with paint) so that it can be used again.
• ◆ In order to achieve a high level of accuracy, open the driver's door and align a reference point on the door sill (e.g. marked with adhesive tape) with the marked starting point.
• ◆ Drive along the route as slowly and as straight as possible. Do not allow the tyres to spin.
• ◆ Align the mark on the vehicle with the mark at the finishing point and stop the vehicle.

Display:

Notes:

• ◆ Used standard tyres do not cause any changes in the track width.
• ◆ Special tyres can change the track width. Any changes greater than 1% must be entered.
• ◆ If no new track width changes are entered, the track width according to the selected vehicle type is maintained.
  Possible wheel treads => Wheel tread table, Page 91-171.

• ‒ If there is no track width change, select the menu item "NO" and confirm with the "ENTER" key.
• ‒ If the track width has changed, select the menu item "YES" and confirm with the "ENTER" key.

Display:

• ‒ → Enter the wheel tread using the cursor keys and the "ENTER" key.
• ‒ Once the wheel tread has been entered (e.g. 1.479 mm), hold down the "ENTER" key (approx. 2 seconds) to confirm.

Example of display:

Track width table:

If an unrealistic track width for the vehicle is entered (e.g. track width of the selected vehicle type ± 100 mm), the following display appears:

• ‒ Press the "ENTER" key to continue and re-enter the tread width.

Display:

• ‒ Press "ENTER" key to continue.

Display:

• ‒ Press "ENTER" key to continue.

Display:

• ‒ → Enter the length of the prepared driving route using the cursor keys and the "ENTER" key.
• ‒ Once the complete length of the driving route has been entered (e.g. 105 m), hold down the "ENTER" key (approx. 2 seconds) to confirm.

Example of display:

• ‒ Confirm the selection with the "ENTER" key, if correct.
  Alternatively, select "NO", confirm with the "ENTER" key and re-enter the driving route.

Display:

• ‒ Drive the vehicle exactly to the starting point of the calibration route and continue with the "ENTER" key.

Display:

• ‒ To start, confirm with the "ENTER" key and drive along the route according to the specifications.

Display:

• ‒ Confirm the display OK with the "ENTER" key on completion of the route.

If the calibration is OK, the wheel calibration is terminated => Page 91-179.

However, if errors occur during the wheel calibration, one of the following error causes will appear on the display:

1. Cause "Defective wheel pulse"

• ‒ Press the "ENTER" key to continue and check the wheel pulse signals.

=> Running Gear; Repair group 01, Self-diagnosis, Electrical test

• ‒ Repeat wheel calibration => Page 91-161.

2. Cause "Route was too short"

• ‒ Press the "ENTER" key to continue and re-enter the length of the calibration route => Page 91-174.

3. Cause "Invalid vehicle values"

• ‒ Press the "ENTER" key to continue and repeat the wheel calibration correctly => Page 91-161.

Terminating the wheel calibration

Display:

• ‒ Confirm the selection with the "ENTER" key to terminate the wheel calibration.