TorqFix

Coding airbag control unit J234 with fault reader V.A.G 1551 — VW

Coding airbag control unit J234 with fault reader V.A.G 1551 on VW: factory workshop procedure. Full factory text, tools and checks.

Workshop procedure for VW — the factory write-up, straight from real workshop data.

factory workshop text

📋 Procedure

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
Chapter
.
Switch on ignition.
Press key
1
for
“rapid data transfer”
mode.
Indicated on display:
Rapid data transfer HELP
Input address word XX
Press keys
1
and
5
(the address word of the vehicle system to be tested
“Airbag”
is entered with 15).
Indicated on display:
Rapid data transfer Q
15 Airbag
Confirm entry with the
Q
key.
The
airbag warning lamp
K75
is permanently lit.
Indicated on display (see parts catalogue for latest control unit version).
1J0 909 608 AIRBAG VW 3 S V03 ->
Coding 00000 WSC00000
Press
→
key.
Indicated on display:
Rapid data transfer HELP
Select function XX
Press keys
0
and
7
(with 07 the function
“Code control unit”
is selected).
Indicated on display:
Rapid data transfer Q
07 Code control unit
Confirm entry with the
Q
key.
Indicated on display:
Code control unit
Enter code number XXXXX
Enter code number according to the table:
Vehicle equipment
Part No.
Index
Code number
Driver airbag only
6N0 909 603
F
00070
Driver and front passenger airbags
6N0 909 603
AR
16722
Driver airbag only (USA)
1J0 909 603
AR
16722
Driver and front passenger airbags
1J0 909 603
AQ
16721
Driver and front passenger airbags
6N0 909 603
E
00069
Driver and front passenger airbags (USA)
1J0 909 603
T
00084
Driver and front passenger airbags (USA)
1J0 909 603
BC
16963
Driver and front passenger airbags (USA)
6N0 909 603
D
00068
Driver and front passenger airbags with side airbags (USA)
1J0 909 608
J
00074
Driver and front passenger airbags with side airbags (USA)
1J0 909 608
BF
16966
Driver and front passenger airbags with side airbags (USA)
6Q0 909 605
0H
12360
Driver and front passenger airbags with knee bar and side airbags
1J0 909 605
D
00074
Driver and front passenger airbags and side airbags
1J0 909 605
A
00065
1)
Driver airbag and side airbags
1J0 909 608
K
00075
Driver airbag and side airbags
1J0 909 608
BB
16962
Driver airbag and side airbags
1J0 909 608
BC
16963
Driver and front passenger airbags and side airbags
1J0 909 608
A
00065
1)
Driver and front passenger airbags and side airbags
1J0 909 608
BA
16961
Driver airbag and side airbags
1J0 909 608
L
00076
Driver and front passenger airbags and side airbags
1J0 909 608
BD
16964
1)
For vehicles with side airbags, note Part No. of control unit.
Confirm entry with the
Q
key.
The control unit identification number will be displayed with the appropriate index letter, the code number and the workshop code.
1J0 909 608 A AIRBAG VW 3 S V03
Coding 00065 WSC 12345
If the contents of the display are as shown then the coding is successful.
If the entered code number is not accepted by the control unit, the display will indicate an error and will display the entered code number that was not accepted, e.g. 00200:
Indicated on display:
ERROR ->
Coding 00200 not accepted
In this case the control unit has not been programmed with the relevant data for the vehicle. Coding is then not possible. The
airbag warning lamp
K75
will not go out 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 code), or whether an incorrect code number has been entered.
End function:
Press
→
key.
Indicated on display:
Rapid data transfer HELP
Select function XX
Press keys
0
and
6
to end the output.
Confirm entry with the
Q
key.
Indicated on display:
Rapid data transfer Q
06 End output
The
airbag warning lamp
K75
must go out after max. 4 seconds.

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Workshop data on this page last updated 20 Sep 2026.