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Interrogating and erasing fault memory > < Technical data of self-diagnosis

Octavia Mk1

Connecting up the vehicle system tester V.A.G 1552 and selecting the control unit for engine electronics
Connecting up the vehicle system tester -V.A.G 1552- and selecting the control unit for engine electronics
Special tools, test equipment as well as aids required
t  Vehicle system tester -V.A.G 1552- with cable -V.A.G 1551/3-, 3A, 3B or 3C
Test conditions
l  Battery voltage at least 11.5 volts
l  Fuse no. 12 o.k.
l  Earth connection at gearbox and on the left below battery O.K.
Test sequence
   
–  Connect vehicle system tester -V.A.G 1552- with cable -V.A.G 1551/3-.
Once the vehicle system tester has been connected:
–  Depending on the desired function either switch on the ignition or start the engine → Anchor, table “Available functions”.
If the read-outs as shown in the work sequence are not displayed, refer to the following notes:
  Note
t  If “Error in data transmission” is displayed because of an incorrect entry, unplug cable from vehicle system tester, plug in again and repeat all the work steps.
t  If one of the following messages appears in the display, carry out fault finding as specified in the fault finding program diagnostic cable:
t  → Current flow diagrams and Fitting locations
  S01-0045
t  → Operating instructions of the vehicle system tester
  
Vehicle system test               HELP
The control unit does not respond
  
Vehicle system test               HELP
Fault in communication set-up
  
Vehicle system test               HELP
K cable does not connect to earth
  Note
Operate the vehicle system tester by referring to the read-out on the display.
  
Vehicle system test               HELP
K cable does not connect to pos. term.
Readout on display:
–  Enter address word 01 “Engine electronics” and confirm entry with Q.
  
Vehicle system test               HELP
Enter address word XX
The control unit identification appears in the display, e.g.:
  
038906018..  1.9l  R4  EDC G00SG 1816  ->
Coding 00002                   WSC 01234
t  038906018..
Part No. of the control unit (current control unit version
→ Electronic Catalogue of Original Parts)
t  1.9 ltr.
Displacement of engine
t  R4
Engine version (4 cyl. in-line engine)
t  EDC
Injection system (Electronic Diesel Control)
t  G, or no display
Vehicle with or without cruise control system
t  00
Control unit mapping
t  SG / AG
Manual gearbox / automatic gearbox
t  1816
Data status (software version) of the control unit
t  Coding 00002
Coding variant of the control unit
t  WSC 01234
Workshop code from the -V.A.G 1552-, with which the last coding was performed, provided the factory-entered coding has not been changed WSC 00000 appears.

Overview of the control units
   
Part no. of the
control unit 1)		Software versionRunning date
038906018AM1816? 08.98
038906018BR211308.98 ? 04.99
038906018GN216305.99 ? 07.00
038906012BA283005.99 ? 07.00
038906012G331408.00 ? 07.03
038906012CL331608.00 ? 07.03
038906012HC492308.03 ?

1) Current control unit version → Electronic Catalogue of Original Parts.
  Note
t  If the control unit version displayed does not correspond to the vehicle, replace the control unit → Chapter.
t  Incorrect coding of the engine control unit results in:
t  Handling problems (jerky gear change, load change jolts etc.)
t  Increase in fuel consumption
t  Increase in pollution
t  Storage of non-existent faults in fault memory
t  Non-execution of functions
t  Reduction of the gearbox life
If the code does not match the version of the vehicle:
–  Test coding of engine control unit → Chapter.
–  Press → key.
   
Readout on display:
–  Further procedure, see repair sequences.
  
Vehicle system test               HELP
The control unit does not respond
Vehicle system test               HELP
Select function XX

Interrogating and erasing fault memory > < Technical data of self-diagnosis