Audi Workshop Service and Repair Manuals

• ◆ To which function of the navigation system does the customer's complaint refer?
• ◆ Has the customer operated the navigation system according to the operating instructions?
• ◆ Which messages appeared on the display? Assessing the messages .
• ◆ Could the customer have transported objects on the roof at any time? Possible causes of interference in or on the vehicle => Page 91-147.
• ◆ Does the customer often transport magnetic metallic parts in the vehicle? Possible causes of interference in or on the vehicle => Page 91-147.
• ◆ Has the customer exposed the vehicle to external sources of interference? => Page 91-147

Important display messages

Note:

Five important display messages are explained below and possible remedies offered.

Display message 1:

• ◆ There is no navigation system CD in the CD-ROM drive.
• ‒ Insert a navigation system CD in the CD-ROM drive.

Display message 2:

• ◆ The navigation system CD in the CD-ROM drive cannot be read.
• ‒ Check whether the navigation CD has been inserted correctly. The label must be facing upwards and the CD must only be inserted with the ignition switched on.
• ‒ Check the CD for dirt and, if present, remove carefully with a soft cloth. If you establish that the CD is scratched, use a replacement CD.
• ‒ Check that the push button on the CD-ROM drive is in the "ON" position when the CD is inserted.

• ◆ The CD-ROM drive does not function in some cases.
• ‒ Check that the navigation system control unit with CD-ROM drive is installed horizontally and is firmly seated.
• ‒ Check that the normal function noises are emitted from the CD-ROM drive with the CD inserted and the navigation system activated. If grinding or scratching noises can be heard, replace the navigation system control unit and CD ROM drive => Page 91-258.

Display message 3:

• ◆ The navigation system does not possess any usable location information.
• ‒ Enter the location at a suitable junction => Page 91-250.

Display message 4:

• ◆ The wheel sensor signals emitted by the ABS control unit are faulty.
• ‒ Perform the system test (wheel pulse test) => Page 91-213 and rectify any faults.
• ◆ The navigation system has no/faulty calibration values.
• ‒ Perform the following calibration operation:
  Performing wheel calibration => Page 91-196

• ◆ Navigation system magnetic field sender (compass) and/or wiring is damaged.
• ‒ Perform the system test (compass test) => Page 91-213 and rectify any faults.
• ◆ Navigation system aerial and/or wiring is damaged.
• ‒ Perform the system test (interior control unit test) => Page 91-213 and rectify any faults.
• ◆ The satellites are not transmitting any GPS signals.

Note:

It can happen in certain circumstances, e.g. in a military emergency, that satellite signals are not always available.

Magnetic field sender (compass) possibly exposed to interference

Sources of interference in or on vehicle:

• ◆ Magnetic metal objects (e.g. bicycle, tool box, ladder, steel rims etc.) in vehicle
• ◆ Magnetic metal objects on roof or roof rack
• ◆ Signs, registration plates or aerials etc. with magnetic bases
• ◆ Move backrests

Sources of interference outside of vehicle:

• ◆ HT cables
• ◆ Steel bridges
• ◆ Industrial plants (e.g. electroplating plant)
• ◆ HGV with metallic charge
• ◆ High-rise buildings
• ◆ Wire fencing
• ◆ Railway overhead lines
• ◆ Railway lines