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Volkswagen Workshop Service and Repair Manuals

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Golf Mk4

Body self-diagnosis
Self-diagnosis of airbag system
Coding airbag control unit

Notes:

  • ◆ The actual code number status can only be found in Vehicle Testing and Information System VAS 5051.
  • ◆ In guided fault finding the list of code numbers can be selected by pressing the "Goto" button and selecting functions (Functions- and component selection).

Coding is only possible when a new control unit is used.

  • ‒ Connecting fault reader .
  • ‒ Switch on printer with Print button (warning lamp in button lights up).

The airbag warning lamp (K 75) lights up continuously.

  • ‒ 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.
 
→ Indicated on display (see parts catalogue for latest control unit version):
1J0 909 609           AIRBAG VW 3 SG     V03     ⇒
Coding 00000     WSC 00000
  • ‒ 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 (0-32000)

- Enter code number according to table:

Notes:

  • ◆ The actual code number status can only be found in Vehicle Testing and Information System VAS 5051.
  • ◆ In guided fault finding the list of code numbers can be selected by pressing the "Goto" button and selecting functions (Functions- and component selection).
  • ‒ Confirm entry with the Q key.
 
→ The control unit identification number with the relevant letter index, code number and workshop code is displayed.
1J0 909 609 A     AIRBAG     VW 3-SG          V03
Coding 00065     WSC 12345

If the contents of the display are as shown then the coding is successful.

If the control unit code number entered is not accepted, then the FAULT and the code number not accepted will be displayed, e.g. 00200:
 
→ Indicated on display:
FAULT     ⇒
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 (K 75) 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.

Ending 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

Airbag warning lamp (K75) must go out after approx. 4 seconds.

Interrogating fault memory

  • ‒ Connecting fault reader => Page 01-7 .
  • ‒ Switch on printer with Print button (warning lamp in button lights up).
  • ‒ Press keys -0- and -2- (the function "Interrogate fault memory" is entered with 02).
 
→ Indicated on display:
Rapid data transfer     Q
02 - Interrogate fault memory
  • ‒ Press Print key.
  • ‒ Confirm entry with the Q key.
 
→ The number of stored faults appears in the display.
X faults recognized!    

The stored faults are displayed and printed out one after the other.

  • ‒ The faults printed out can be rectified using fault table => from Page 01-20 .
 
If "No fault recognised" is displayed the programme will return to the initial position after pressing the ⇒ key.
No fault recognised!     ⇒
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX

If something else is displayed:

=> Fault reader operating instructions

  • ‒ End output (function 06) => Page 01-19 .
  • ‒ Switch off ignition and separate diagnostic connections.

Note:

If a fault is recognised:

  • ◆ . Rectify fault
  • ◆ 2. Erase fault memory (function 05).
  • ◆ 3. Interrogate fault memory again (function 02).

Erasing fault memory

  • ‒ Connecting fault reader => Page 01-7 .
  • ‒ Switch on printer with Print button (warning lamp in button lights up).

Prerequisites:

  • ◆ Faults are rectified
  • ◆ Fault memory interrogated again
  • ‒ Press keys -0- and -5- (the function "Erase fault memory" is entered with 05).
 
→ Indicated on display:
Rapid data transfer     Q
05 Erase fault memory
  • ‒ Confirm entry with the Q key.
 
→ Indicated on display:
Rapid data transfer     ⇒
Fault memory is erased!
  • ‒ Press ⇒key.
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX

Notes:
     
    → If this appears in the display, the test sequence is faulty.
    Warning!    
    Fault memory was not interrogated
  • ◆ Adhere strictly to test sequence; first of all interrogate fault memory, then erase memory.

    • End output

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

    Fault table

    Notes:

    • ◆ The following table lists all the faults, with the corresponding 5-digit code numbers, that can be recognized by the airbag control unit -J234- and displayed and printed out by the V.A.G 1551 or VAS 5051.
    • ◆ Fault codes appear only on print-out.
    • ◆ Some of the text listed will only be displayed on the VAS 5051. Only the code numbers will be printed out on the V.A.G 1551.
    • ◆ Possible faults are dependent on the relevant vehicle equipment.
    • ◆ Before replacing a component shown as faulty, check wiring and connections to the component as well as earth connections according to current flow diagram.
    • ◆ Check all relay plate connections are seated securely.
    • ◆ When repair has been carried out, the fault memory must always be interrogated again with the fault reader V.A.G 1551 or VAS 5051 and erased.
    • ◆ In addition, the fault type may also appear in the fault table.

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    00000

    No fault recognized

    If "No fault recognized" appears after performing repairs, the self-diagnosis is ended.

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    00532

    Supply voltage

    Signal too large

    Alternator faulty

    - Test alternator:
    => Current flow diagrams, Electrical fault finding, Fitting locations

    Signal too small

    Wiring or connections to airbag control unit (J234)

    - Test wiring and connections to control unit using current flow diagram

    Battery discharged or defective

    - Charge or renew battery

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    00588

    Airbag igniter - driver's side (N95)

    Resistance too high

    Resistance too low

    Short to positive

    Short to earth

    Defective wiring or connections

    - Renew defective wiring or connections

    Driver's airbag (N95) defective

    - Renew driver's airbag (N95)

    Coil connector with slip ring (F138) defective

    - Renew coil connector with slip ring; for vehicles with ESP, fitted in a housing together with steering angle sender (G85)

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    00589

    Airbag igniter 1 - passenger's side (N131)

    Resistance too high

    Resistance too low

    Short to positive

    Short to earth

    Defective wiring or connections

    - Renew defective wiring or connections

    Front passenger's airbag igniter (N131) defective

    - Renew front passenger's airbag unit (N131)

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    00591

    Driver's belt switch

    Undefined switch position

    Short to earth

    Open circuit/short to positive

    Defective wiring or connections

    - Renew defective wiring or connections

    Driver's belt switch (E24) defective

    - Renew driver's belt switch (E24)

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    00592

    Front passenger's belt switch (E25)

    Undefined switch position

    Short to earth

    Open circuit/short to positive

    Defective wiring or connections

    - Renew defective wiring or connections

    Front passenger's belt switch (E25)

    - Renew front passenger's belt switch (E25)

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    00594

    Airbag igniter circuit

    Short circuit

    Defective wiring or connections to airbag units

    - Read measured value block

    00595

    Crash data stored

    - Renew control unit

    - Renew triggered airbag units and all damaged components

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    00654

    Belt tensioner igniter - driver's side (N153)

    Resistance too high

    Resistance too low

    Short to positive

    Short to earth

    Defective wiring or connectors
    Driver's side belt tensioner igniter (N153) defective

    - Read measured value block
    Replace driver's side belt tensioner (N153)

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    00655

    Belt tensioner igniter, front passenger's side (N154)

    Resistance too high

    Resistance too low

    Short to positive

    Short to earth

    Defective wiring or connectors
    Passenger's side belt tensioner igniter (N154) defective

    - Read measured value block
    Replace passenger's side belt tensioner (N154)

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01025

    Fault warning lamp activation defective

    Fault warning lamp defective

    - Renew dash panel insert

    Defective wiring or connections
    Control unit defective

    - Renew defective wiring or connections
    Control unit defective

    01044

    Control unit incorrectly coded

    Control unit not intended for this vehicle

    - Install control unit appropriate to vehicle equipment according to parts catalogue

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01211

    Rear belt tensioner igniter, driver's side (N196)

    Resistance too high

    Resistance too low

    Short to positive

    Short to earth

    Defective wiring or connections

    - Renew defective wiring or connections
    Read measured value block

    Rear belt igniter, driver's side (N196) defective

    - Replace rear belt igniter, driver's side (N196)

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01212

    Rear belt tensioner igniter, front passenger's side (N197)

    Resistance too high

    Resistance too low

    Short to positive

    Short to earth

    Defective wiring or connections

    - Renew defective wiring or connections
    Read measured value block

    Rear belt tensioner front passenger's side (N197) defective

    - Renew rear belt tensioner front passenger's side (N197)

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01214

    Crash data belt tensioner stored

    - Erase fault memory or renew control unit
    If belt tensioner has been triggered, you can erase the message "Crash data belt tensioner stored" twice by erasing fault memory.
    After the belt tensioner has been triggered for the 3rd time, the fault "Control unit defective" will be registered, and the control unit must be renewed.

    - Renew belt tensioner and all damaged components

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01217

    Driver's, side airbag igniter (N199)

    Resistance too high

    Resistance too low

    Short to positive

    Short to earth

    Defective wiring or connections

    - Renew defective wiring or connections
    Read measured value block

    Driver's side, side airbag igniter (N199) defective

    - Renew driver's side, side airbag (N199)

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01218

    Front passenger's, side airbag igniter (N200)


    Resistance too high

    Resistance too low

    Short to positive

    Short to earth

    Defective wiring or connections

    - Renew defective wiring or connections
    Read measured value block

    Passenger's side, side airbag igniter (N200) defective

    - Renew passenger's side, side airbag (N200)

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01219

    Rear side airbag igniter, driver's side (N201)


    Resistance too high

    Resistance too low

    Short to positive

    Short to earth

    Defective wiring or connections

    - Renew defective wiring or connections

    Rear side airbag igniter, driver's side (N201) defective

    - Renew rear side airbag igniter, driver's side (N201)

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01220

    Rear side airbag igniter, front passenger's side (N202)


    Resistance too high

    Resistance too low

    Short to positive

    Short to earth

    Defective wiring or connections

    - Renew defective wiring or connections

    Rear side airbag igniter, front passenger's side (N202) defective

    - Renew rear side airbag igniter, front passenger's side (N202)

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01221

    Driver's side, side airbag crash sensor (G179)

    Short to positive

    Short to earth

    defective

    Defective wiring or connections

    - Renew defective wiring or connections

    Crash sensor defective
    Control unit defective

    - Renew damaged component

    No setting or incorrect setting

    Crash sensor not programmed or incorrectly programmed

    - Renew crash sensor

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01222

    Passenger's side, side airbag crash sensor (G180)

    Short to positive

    Short to earth

    Defective

    Defective wiring or connections

    - Renew defective wiring or connections

    Crash sensor defective
    Control unit defective

    - Renew damaged component

    No setting or incorrect setting

    Crash sensor not programmed or incorrectly programmed

    - Renew crash sensor

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01224

    Control unit does not match vehicle

    Control unit does not correspond to vehicle equipment (number of airbags in vehicle)

    - Install control unit appropriate to vehicle equipment according to parts catalogue

    01226

    Crash data side airbag DS stored

    - Erase fault memory or renew control unit
    If side airbag has been triggered, you can erase the message "Crash data side airbag DS stored" twice by erasing fault memory.
    After the side airbag has been triggered for the 3rd time, the fault "Control unit defective" will be registered, and the control unit must be renewed.

    - Renew airbag unit and all damaged components

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01227

    Crash data side airbag PS stored

    - Erase fault memory or renew control unit
    If side airbag has been triggered, you can erase the message "Crash data side airbag PS stored" twice by erasing fault memory.
    After the side airbag has been triggered for the 3rd time, the fault "Control unit defective" will be registered, and the control unit must be renewed.

    - Renew airbag unit and all damaged components

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01228

    Airbag deactivation key switch, FPS (E224)

    Undefined switch position

    Short to earth

    Open circuit

    Defective wiring or connections

    - Renew defective wiring or connections

    Airbag deactivation key switch, front passenger's side (E224) defective

    - Renew airbag deactivation key switch, front passenger's side (E224)

    Front passenger's airbag or side airbag defective

    - Renew front passenger's airbag or side airbag

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    012801)

    Front passenger's airbag is deactivated

    Front passenger's airbag not functional

    Control unit was adapted

    012811)

    Driver's airbag is deactivated

    Driver's airbag not functional

    Control unit was adapted

    012841)

    Driver's side airbag is deactivated

    Driver's side airbag not functional

    Control unit was adapted

    012851)

    Front passenger's side airbag is deactivated

    Passenger's side airbag not functional

    Control unit was adapted

    012861)

    Driver's belt tensioner is deactivated

    Driver's belt tensioner not functional

    Control unit was adapted

    012871)

    Front passenger's belt tensioner is deactivated

    Front passenger's belt tensioner not functional

    Control unit was adapted

    1)     The fault message will only be stored in the fault memory when the adaption is activated.

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01299

    Diagnosis interface for data bus

    No communication

    Defective wiring or connections
    Diagnostic interface (J533) defective

    - Renew or repair defective wiring or connections
    Check diagnostic interface (J533) and replace if necessary (replace dash panel insert)
    => Electrical system self-diagnosis; Repair group 01; Diagnostic interface for data bus

    No setting or incorrect setting

    Diagnostic interface (J533) in dash panel insert is not coded or incorrectly coded

    - Check or perform coding of diagnostic interface (J533)
    => Electrical system self-diagnosis; Repair group 01; Diagnostic interface for data bus

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01312

    Data bus drive line

    Defective

    Defective wiring or connections

    - Renew or repair defective wiring or connections
    => Current flow diagrams, Electrical fault finding and Fitting locations

    Coding of control units is not in order

    - Check coding of control units, interrogate fault memories of all control units

    Diagnostic interface (J533) defective

    - Check diagnostic interface (J533) and renew if necessary (renew dash panel insert)
    => Electrical system self-diagnosis; Repair group 01; Diagnostic interface for data bus

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01317

    Control unit in dash panel insert (J285)

    No communication

    Defective wiring or connections

    - Renew or repair defective wiring or connections

    Coding of control units is not in order

    - Check coding of control units, interrogate fault memories of all control units

    Diagnostic interface (J533) defective

    - Check diagnostic interface (J533) and renew if necessary (renew dash panel insert)
    => Electrical system self-diagnosis; Repair group 01; Diagnostic interface for data bus

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01578

    Airbag deactivated warning lamp, front passenger's side (K145)

    Short to positive

    Open circuit

    Defective wiring or connections

    - Renew defective wiring or connections

    Airbag deactivated warning lamp, front passenger's side (K145)

    - Renew airbag deactivated warning lamp, front passenger's side (K145)

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01588

    Igniter for driver's head airbag (N 251)

    Resistance too high

    Resistance too low

    Short to positive

    Short to earth

    Defective wiring or connections

    - Renew defective wiring or connections

    Head airbag igniter (N251) defective

    - Renew head airbag (N251)

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01589

    Igniter for front passenger's airbag (N252)

    Resistance too high

    Resistance too low

    Short to positive

    Short to earth

    Defective wiring or connections

    - Renew defective wiring or connections

    Head airbag igniter (N252) defective

    - Renew head airbag (N252)

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01590

    Battery isolation igniter (N253)

    Resistance too high

    Resistance too low

    Short to positive

    Short to earth

    Defective wiring or connections

    - Renew defective wiring or connections

    Battery isolation igniter (N253) defective

    - Renew wiring for battery positive and igniter for wiring open circuit

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    016341)

    Igniter for battery detached switched off

    Igniter for battery detached not functioning

    Control unit was adapted

    01635

    Crash data for igniter for battery detached stored

    - Erase fault memory or renew control unit
    If the battery is detached you can erase the message "Crash data for igniter for detached battery stored" twice by erasing fault memory.
    After the battery detached has been triggered for the 3rd time, the fault "Control unit defective" will be registered and the control unit must be renewed.

    - Repair detached battery and replace all damaged components

    1)     The fault message will only be stored in the fault memory when the adaption is activated.

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01638

    Rear side airbag crash sensor, driver's side (G256)

    Short to positive

    Short to earth

    defective

    Defective wiring or connections

    - Renew defective wiring or connections

    Crash sensor defective
    Control unit defective

    - Renew damaged component

    No setting or incorrect setting

    Crash sensor not programmed or incorrectly programmed

    - Renew crash sensor

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01639

    Rear side airbag crash sensor, front passenger's side (G257)

    Short to positive

    Short to earth

    defective

    Defective wiring or connections

    - Renew defective wiring or connections

    Crash sensor defective
    Control unit defective

    - Renew damaged component

    No setting or incorrect setting

    Crash sensor not programmed or incorrectly programmed

    - Renew crash sensor

    - Read measured value block

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    016441)

    Rear side airbag on driver's side is deactivated

    Rear side airbag on driver's side not functioning

    Control unit was adapted

    016451)

    Rear side airbag on front passenger's side is deactivated

    Rear side airbag on front passenger's side airbag not functioning

    Control unit was adapted

    016461)

    Driver's head airbag is deactivated

    Driver's head airbag not functional

    Control unit was adapted

    016471)

    Front passenger's head airbag is deactivated

    Front passenger's head airbag not functional

    Control unit was adapted

    016481)

    Rear belt tensioner on driver's side is deactivated

    Rear belt tensioner on driver's side not functioning

    Control unit was adapted

    016491)

    Rear belt tensioner on front passenger's side is deactivated

    Rear belt tensioner on front passenger's side not functioning

    Control unit was adapted

    1)     The fault message will only be stored in the fault memory when the adaption is activated.

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    01650

    Crash data rear side airbag DS stored

    - Erase fault memory or renew control unit
    If side airbag has been triggered, you can erase the message "Crash data rear side airbag DS stored" twice by erasing fault memory.
    After the side airbag has been triggered for the 3rd time, the fault "Control unit defective" will be registered, and the control unit must be renewed.

    - Renew airbag unit and all damaged components

    01651

    Crash data rear side airbag PS stored

    - Erase fault memory or renew control unit
    If side airbag has been triggered, you can erase the message "Crash data rear side airbag PS stored" twice by erasing fault memory.
    After the side airbag has been triggered for the 3rd time, the fault "Control unit defective" will be registered, and the control unit must be renewed.

    - Renew airbag unit and all damaged components

    V.A.G 1551 printout

    Possible cause of fault

    Rectifying fault

    65535

    Control unit defective

    Control unit defective

    Renew control unit

    Adaption > < Function