volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Read measured value block > < Coding airbag control unit
Body self-diagnosis
Self-diagnosis of airbag system
Adaption

The airbags and belt tensioners can be deactivated or activated in the adaption mode.

If airbags or belt tensioners are to be deactivated in a vehicle, apart from the deactivation permission must be obtained from the manufacturer (customer support).

For example, to enable the use of a rear-facing child seat on the front passenger seat, the front passenger's airbag unit can be deactivated using fault reader V.A.G 1551. As soon as the child seat is no longer required, the front passenger's airbag should be reactivated.

When a front passenger airbag is deactivated, the electrical connection must be disconnected in addition to blocking the control unit software.

The airbag electrical connection for the front passenger airbag must be reconnected before the front passenger airbag is reactivated via the control unit software.

It is necessary to install a vehicle specific resistance connector on vehicles with an airbag control unit version less than VW5, with the exception of control units VW3 Part No. 1J0 909 609 (interrogate control unit version ). (For VW5 control units and higher and VW3 control units Part No. 1J0 909 609 a resistance connector is not necessary).

Repair kit 1J0 998 521 is required for converting control units which are less than version VW5, with exception of control units VW3 Part No. 1J0 909 609.

After the airbag unit is deactivated or activated, the registration card (see illustrations catalogue in Technical Service Handbook) must be completed and sent to the relevant distribution centre or importer for registration. Confirmation of the conversion must be entered into service documents.

In Germany, the blocking (deactivating) or reactivation of the system must be checked by an authorised test centre, for example the TÜV and confirmed with an entry in the vehicle documents.

The 2nd registration card must be retained by the customer until the passenger module is reactivated (vehicle wallet).

Deactivating

  • ‒ Connecting fault reader => Page 01-7 .
  • ‒ Switch on printer with Print button (warning lamp in button lights up).
  • ‒ Press keys -1- and -0-.
 
→ Indicated on display:
Rapid data transfer     Q
10 - Adaption
  • ‒ Confirm entry with the Q key.
 
→ Indicated on display:
Adaption    
Enter channel number XX
  • ‒ Press keys -0- and -1- and confirm with Q key.
 
→ Indicated on display:
Channel 1     Adaption 0     ⇒
P. airbag activated     WSC 01948
  • ‒ Press ⇒key.
 
→ Indicated on display:
Channel 1     Adaption 0     Q
Enter adaptation value XXXXX
  • ‒ Enter 00001 and confirm with Q key.
 
→ Indicated on display:
Channel 1     Adaption 1     ⇒
P. airbag blocked     WSC 01948
  • ‒ Press ⇒key.
 
→ Indicated on display:
Channel 1     Adaption 1     Q
Store changed value?
  • ‒ If the value is to be stored confirm entry with Q key.
  • ‒ If the value is not to be stored then erase entry with C key. On the display appears the previous value.
 
→ Indicated on display:
Channel 1     Adaption     1     ⇒
Amended value is stored
  • ‒ Press ⇒key.
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX
  • ‒ Press keys -0- and -6- to end output.
 
→ Indicated on display:
Rapid data transfer     Q
06 End output
  • ‒ Confirm entry with the Q key.

The airbag (K75) warning lamp goes out.

 
→ Indicated on display:
Rapid data transfer     HELP
Enter address word XX
  • ‒ Switch off ignition.

In addition to the blocking of the software side of the front passenger airbag there is also the requirement to disconnect the wiring connector to the front passenger airbag module and for an airbag control unit version less than VW5 it is necessary to fit a vehicle specific resistor.

Warning!
Disconnect battery earth strap before working on the electrical system.
 
N69-0138
Warning!
The mechanic must electrostatically discharge him/herself before the airbag system is touched. This is done by touching an earthed metal object such as water pipe, heater pipe or metal support etc.
  • ‒ Remove glove box.

=> General body repairs, interior; Repair group 68; Compartments, covers and trims

  • ‒ → Pull connector -1- out of airbag connector -2- (Airbag connector housing remains in retainer).
 
N69-0148

Vehicles with an airbag control unit version less than VW5, except control unit VW3 Part No. 1J0 909 609

  • ‒ → Insert connector housing -3- from repair kit 3B0 998 521 B into connector -1- to airbag control unit.
  • ‒ Secure connector housing -3- and connector -1- to airbag wiring harness so that it does not rattle (use foam tube from repair set 3B0 998 521 B).
 
N01-0504
  • ‒ → Insert notice plate -1- into diagnostic connector (notice plate remains in vehicle until front passenger airbag is reactivated).

Vehicles with an airbag control unit version VW5 or higher and VW3 control unit Part No. 1J0 909 609

  • ‒ Secure detached airbag wiring harness connector so that it does not rattle.

Continuation of all vehicles

  • ‒ Install glove box.
  • ‒ Reconnect battery earth strap.
  • ‒ Switch on ignition.
 
N69-0049

The warning lamp (K75) lights up at first for approx. 4 seconds and then flashes for a further approx. 15 seconds. This signalizes that the front passenger's airbag is switched off.

  • ‒ → Attach sticker -1- (Front passenger airbag deactivated) above air vent -2- on dash panel.

Activating

  • ‒ Reinstate electrical connection for front passenger's airbag first.
  • ‒ Remove glove box.

=> General body repairs, interior; Repair group 68; Compartments, covers and trims

Warning!
Disconnect battery earth strap before working on the electrical system.
Warning!
The mechanic must electrostatically discharge him/herself before the airbag system is touched. This is done by touching an earthed metal object such as water pipe, heater pipe or metal support etc.

Vehicles with an airbag control unit version less than VW5, except control unit VW3 Part No. 1J0 909 609

 
N69-0148
  • ‒ → Cut through/open cable tie -5- and free airbag wiring.
  • ‒ Disconnect connector -3- from connector -1-.

Vehicles with an airbag control unit version VW5 or higher and VW3 control unit Part No. 1J0 909 609

  • ‒ Loosen fastening for the removed passenger's airbag connector and remove.
 
N69-0138

Continuation of all vehicles

  • ‒ → Insert connector -1- into airbag connector housing -2- (airbag connector must engage in retainer).
  • ‒ Install glove box.

=> General body repairs, interior; Repair group 68; Compartments, covers and trims

Vehicles with an airbag control unit version less than VW5, except control unit VW3 Part No. 1J0 909 609

 
N01-0504
  • ‒ → Pull notice plate -1- out from diagnosis connector (notice plate is no longer required).

Continuation of all vehicles

  • ‒ Connecting fault reader => Page 01-7 .
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX
  • ‒ Press keys -1- and -0-.
 
→ Indicated on display:
Rapid data transfer     Q
10 - Adaption
  • ‒ Confirm entry with the Q key.
 
→ Indicated on display:
Adaption    
Enter channel number XX
  • ‒ Press keys -0- and -1- and confirm with Q key.
 
→ Indicated on display:
Channel 1     Adaption 1     ⇒
P. airbag blocked     WSC 01948
  • ‒ Press ⇒key.
 
→ Indicated on display:
Channel 1     Adaption 1     Q
Enter matching value XXXXX
  • ‒ Enter 00000 and confirm with Q key.
 
→ Indicated on display:
Channel 1     Adaption 0     Q
P. airbag activated     WSC 01948
  • ‒ Confirm entry with the Q key.
 
→ Indicated on display:
Channel 1     Adaption 0     Q
Store changed value?
  • ‒ If the value is to be stored confirm entry with Q key.
  • ‒ If the value is not to be stored then erase entry with C key. On the display appears the previous value.
 
→ Indicated on display:
Channel 1     Adaption 0     ⇒
Changed value is stored
  • ‒ Press ⇒key.
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX
  • ‒ Press keys -0- and -6- to end the output.
 
→ Indicated on display:
Rapid data transfer     Q
06 End output
  • ‒ Confirm entry with the Q key.

The airbag warning lamp (K75) goes out.

 
→ Indicated on display:
Rapid data transfer     HELP
Enter address word XX
  • ‒ Switch off ignition.
  • ‒ Separate connection to fault reader V.A.G 1551.
  • ‒ Switch on ignition.

The airbag warning lamp (K75) lights up and must go out after approx. 4 seconds.

 
N69-0049
  • ‒ → Pull sticker "front passenger airbag inoperative" off dash panel.

Read measured value block > < Coding airbag control unit