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Interrogating control unit version > < Starting immobilizer self-diagnosis

A2

Electrical system, Self-diagnosis
Immobilizer self-diagnosis - immobilizer III
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 for measured value block readout of VAS 5051 or V.A.G 1551, which is to be attached to 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 disconnecting and connecting 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.
  • ◆ 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 .

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 immobilizer: 17

Note:

The joint address word for the dash panel insert has to be used, as the immobilizer is an integral part of the dash panel insert.

  • ‒ Press keys 1 and 7.
 
→ Indicated on display:
Rapid data transfer    Q
17 - Dash panel insert
  • ‒ Confirm entry with Q key.
 
→ Adjacent display appears after approx. 5 s:
8Z0920930 W1-DASH PANEL INSERT VDO D03 ⇒
Code    05042    WSC    06812
    • ‒ 8Z0920930: Part number of dash panel insert (refer also to Parts List)
    • ‒ W1-DASH PANEL INSERT: Component designation
    • ‒ VDO: Manufacturer designation
    • ‒ D03: Software version of dash panel insert
    • ‒ Code 05042: Code for dash panel insert
    • ‒ WSC 06812: Workshop code
  • Press ⇒ key.
 
→ Indicated on display:
WAUZZZ8ZZYN002341 AUZ7Z0X0590944    
  • ◆ WAUZZZ8ZZYN002341: 17-position vehicle identification no. (chassis number)
  • ◆ AUZ7Z0X0590944:14-position identification number of immobilizer control unit
  • ‒ 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 - Interrogating control unit version => Page 01-154

02 - Interrogating fault memory => Page 01-156

05 - Erasing fault memory => Page 01-163

06 - End of output => Page 01-165

08 - Reading measured value block => Page 01-166

10 - Adaption=> Page 01-172

11 - Login procedure => Page 01-200

Interrogating control unit version > < Starting immobilizer self-diagnosis