volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

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Reading measured value block > < Fault table

Passat (B3)

Coding airbag control unitJ234 with fault readerV.A.G 1551
Coding airbag control unit -J234- with fault reader -V.A.G 1551-
Coding is only possible when a new control unit is used.
–  Connect fault reader -V.A.G 1551-.
–  Switch on ignition.
–  Press key -1- for operating mode “Rapid data transfer”.
   
Indicated on display:
–  Press keys -1- and -5- (the address word of the vehicle system to be tested “Airbag” is entered with 15).
  
Rapid data transfer                 HELP
Input address word XX
Indicated on display:
–  Confirm entry with Q key.
The airbag warning lamp -K75- is permanently lit.
  
Rapid data transfer                   Q 
15 Airbag
Indicated on display (see parts catalogue for latest control unit version):
–  Press → key.
  
6N0 909 603 H  AIRBAG VW 2 V00   ->     
Coding 00072                    WSC12345
Indicated on display:
–  Press keys -0- and -7- (with 07 the function “Code control unit” is selected).
  
Rapid data transfer                 HELP
Select function XX
Indicated on display:
–  Confirm entry with Q key.
  
Rapid data transfer                    Q 
07 Code control unit
Indicated on display:
Enter code number according to the table:
  
Code control unit                     Q  
Enter code number  XXXXX
Vehicle equipmentPart No.IndexCode number
Driver's airbag only6N0 909 603J00074
Driver/front passenger airbag6N0 909 603H00072
Airbag with knee bar6N0 909 603G00071

–  Confirm entry with Q key.
   
Control unit identification number is displayed with respective index letter, code number and workshop code.
If the contents of the display are as shown then the coding is successful.
If entered control unit code number is not accepted, the following will be displayed:
  
6N0 909 603   H    AIRBAG  VW 2       V0
Coding 00072                   WSC 12345
Indicated on display:
In this case, airbag control unit -J234- is not programmed with data necessary for vehicle. Coding is then not possible. The airbag warning lamp -K75- will not extinguish and lights up continuously. A check must then be completed to see if the correct control unit for the vehicle has been installed (compare Part No. and letter index), or whether an incorrect code number has been entered.
End function:
–  Press → key.
  
ERROR                                ->
Coding XXXXX not accepted
Indicated on display:
–  Press keys -0- and -6- to end output.
–  Confirm entry with Q key.
  
Rapid data transfer                 HELP
Select function XX
Indicated on display:
Airbag warning lamp -K75- must go out after max. 4 seconds.
  
Rapid data transfer                    Q
06 End output

Reading measured value block > < Fault table