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Interrogating control unit version > < Starting self-diagnosis of navigation system III

A4 Mk1

Radio, Telephone and Navigation System - Self-diagnosis
Self-diagnosis of navigation system III (Route Navigation) (from Wk 29/99)
Safety precautions

Pay attention to the following if testers and measuring instruments have to be used in the course of a test drive:

Attention:
  • ◆ Proceed as follows during measurement and test drives so as to avoid the risk of accident:
  • ◆ Exclusive use is to be made of VAS 5051 or V.A.G 1551 for reading the measured value blocks. The devices must be attached to the rear seat and operated from there by a second person.

Heed the following so as to avoid possible injury and/or the destruction of electrical and electronic components:

  • ◆ Switch off ignition before connecting and disconnecting measuring instruments and testers.
  • ◆ Certain tests may lead to a fault being detected by the control unit and stored. The fault memory is therefore to be interrogated and if necessary erased on completion of all tests and repair work.
  • ◆ Always switch off ignition before disconnecting and connecting battery so as not to damage control units.

Test requirements:

  • ◆ Use current flow diagram to check that fuse is OK.
  • ◆ Connect up vehicle diagnostic, testing and information system VAS 5051/fault reader V.A.G 1551 .
  • ◆ Switch on ignition.

Notes:

  • ◆ If no display appears, use current flow diagram to check power supply for V.A.G 1551.
  • ◆ Additional operating instructions can be called up by pressing the fault reader HELP key.
  • ◆ Next step in program sequence can be selected by pressing ⇒ key.
  • ◆ Incorrect entries can be terminated by pressing C key.
  • ◆ Function 00 "Automatic test sequence" can be implemented in mode 1 "Rapid data transfer". This involves automatic interrogation of all vehicle control units.
  • ‒ Switch on ignition.
  • ‒ Switch on printer by pressing PRINT key (lamp in key lights).
  • ‒ Press key 1 for "Rapid data transfer" mode.
 
→ Indicated on display:
Rapid data transfer    HELP
Enter address word XX

Address word for navigation system: 37

  • ‒ Press keys 3 and 7.
 
→ Indicated on display:
Rapid data transfer    Q
37 - Navigation
  • ‒ Confirm entry with Q key.
 
→ Adjacent display appears after approx. 5 s:
4B0919887A    Navigation    0001    ⇒
Code 00000    WSC 06812
  • ‒ 4B0919887A: Part number of navigation control unit (refer also to Parts List)
  • ‒ Navigation: Component designation
  • ‒ 0001: Software version of navigation control unit with CD drive
  • ‒ Code 00000: Code not used
  • ‒ WSC 06812: Workshop code

Dash panel insert display:


DIAG.

  • ‒ Press ⇒ key.
 
→ If one of the adjacent messages appears on the display, perform fault-finding in line with fault-finding program for diagnostic wire.
Rapid data transfer    HELP
No control unit response
 
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
Rapid data transfer    HELP
Fault in communication link
 
Rapid data transfer    HELP
K-wire not switched to earth
 
Rapid data transfer    HELP
K-wire not switched to positive
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX
  • ‒ Pressing HELP key prints out a list of possible functions.
  • ‒ Press ⇒ key to select next step in program sequence.

Self-diagnosis functions

Possible functions:

01 - Interrogate control unit version => Page 01-141

02 - Interrogate fault memory => Page 01-142

03 - Final control diagnosis => Page 01-151

05 - Erase fault memory => Page 01-154

06 - End output => Page 01-156

08 - Read measured value block => Page 01-157

10 - Adaption=> Page 01-170

Interrogating control unit version > < Starting self-diagnosis of navigation system III