A4 Sedan V6-3.2L (BKH) (2007)
Navigation Module: All Technical Service Bulletins
Navigation System - Route Guidance Inaccurate
91 08 81
2017474/2
November 7, 2008.
Supersedes Technical Service Bulletin Group 91 number 08-11 dated April 10, 2008 for reasons listed below.
Affected Vehicles
91 Navigation plus (RNS-E): Route guidance inaccurate
Condition
Route guidance from the navigation system does not match the route being driven.
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Generally, the spoken route guidance or instructions in the Driver Information Display (DIS) are announced too late.
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The position of the vehicle on the map is not correct and quickly changes after the vehicle makes a turn.
Technical Background
The tire circumference stored in the navigation unit is incorrect.
Production Solution
Corrected adaptation values.
Service
1. Compare the actual value in adaptation channel 1 (Figure 1, green) with the learned value (Figure 1, red). The values should be similar.