Airbag Control Module Coding (GROUP 01, NO. 97-17)

Publication date: 1997-12-08
Reference number: GROUP 01, NO. 97-17

AIRBAG CONTROL MODULE CODING

TECHNICAL SERVICE BULLETIN

Reference Number(s): GROUP 01, NO. 97-17, Date of Issue: December 8, 1997

AUDI:	1997-on A8
SECTION:	01 - On-Board Diagnostic

NOTE: File this Technical Bulletin in Repair Manual No.: W42 015 196 109.

SERVICE INFORMATION

Information on coding the airbag control module has been revised to include new coding options that apply to m.y. 1998 vehicles. The repair information that follows has been revised, and will be integrated with the next Repair Manual update.

AIRBAG ON BOARD DIAGNOSTIC (OBD)

CODE CONTROL MODULE (SCAN TOOL FUNCTION 07)

NOTE: Replacement airbag control modules are not coded. The airbag Malfunction Indicator Lamp (MIL) remains on if an airbag control module has not been coded. The airbag control module is coded using the VAG 1551 scan tool.

If the correct code is not displayed, or the airbag control module has been replaced, code the control module as follows:

VAG 1551 scan tool connected and "Airbag" address word 15 selected. Display will show the following:

Fig 1: DISPLAY 1
Press buttons -0- and -7- to select "Code Control Module" function 07.
Display will show the following:

Fig 2: DISPLAY 2
Press -Q- button to confirm input.
Display will show the following:

Fig 3: DISPLAY 3
Enter code number using VAG 1551 key pad:
- Audi A8, m.y. 1997: 00224
- Audi A8, m.y. 1998-on: 00225
Display will show the following (example showing coding "00224"):

Fig 4: DISPLAY 4
Press --> button to advance scan tool program sequence.
Display will show the following:

Fig 5: DISPLAY 5
Press buttons -0- and -6- to select "End Output" function 06.
Display will show the following:

Fig 6: DISPLAY 6
Press -Q- button to confirm input.

CHECKING CODING STATUS FOR REAR SIDE AIRBAGS

VAG 1551 scan tool connected
Display will show the following:

Fig 7: DISPLAY 7
Press buttons -1- and -5- to insert "Airbag" address word 15.
Display will show the following:

Fig 8: DISPLAY 8
Press -Q- button to confirm input.
Display will show the following:

Fig 9: DISPLAY 9
Display will show the following (example) after approx. 5 seconds:

Fig 10: DISPLAY 10

M.Y. 1997
- Coding 00224: Rear side airbags ACTIVE
- Coding 00124: Rear side airbags INACTIVE
M.Y. 1998-on
- Coding 00225: Rear side airbags ACTIVE
- Coding 00125: Rear side airbags INACTIVE
Press --> button to advance scan tool program sequence.

CODING TO DEACTIVATE REAR SIDE AIRBAGS

WARNING: Rear side airbags should be deactivated or reactivated ONLY with the customer's written request and signature. Disconnect the harness connectors for rear side airbags before coding the airbag control module to make the rear side airbags inactive.

NOTE: The rear side airbags can only be activated or deactivated on both left and right sides together. They cannot be activated or deactivated individually.

VAG 1551 scan tool connected and "Airbag" address word 15 selected
DTC memory checked
Display will show the following:

Fig 11: DISPLAY 11
Press buttons -0- and -7- to select "Code Control Module" function 07.
Display will show the following:

Fig 12: DISPLAY 12
Press -Q- button to confirm input.
Display will show the following:

Fig 13: DISPLAY 13
Enter code number using VAG 1551 key pad:
- Audi A8, m.y. 1997: 00124 (rear side airbags INACTIVE)
- Audi A8, m.y. 1998-on: 00125 (rear side airbags INACTIVE)
Display will show the following (example showing "00124" entered):

Fig 14: DISPLAY 14
Press --> button to advance scan tool program sequence.
Display will show the following:

Fig 15: DISPLAY 15
Press buttons -0- and -5- to select "Erase DTC Memory" function 05.
Display will show the following:

Fig 16: DISPLAY 16
Press -Q- button to confirm input.
Display will show the following:

Fig 17: DISPLAY 17
Press --> button to advance scan tool program sequence.
Display will show the following:

Fig 18: DISPLAY 18
Press buttons -0- and -6- to select "End Output" function 06.
Display will show the following:

Fig 19: DISPLAY 19
Press -Q- button to confirm input.
Display will show the following:

Fig 20: DISPLAY 20
Disconnect VAG 1551 scan tool.
Switch ignition off, then switch ignition on.

NOTE: After 4 seconds, the airbag Malfunction Indicator Lamp (MIL) must go out, indicating that there are no stored malfunctions.

CODING TO REACTIVATE REAR SIDE AIRBAGS

Repeat procedure for coding airbag control module and change coding back to original value for active rear side airbags.

Audi A8, m.y. 1997: 00224 (rear side airbags ACTIVE)
Audi A8, m.y. 1998-on: 00225 (rear side airbags ACTIVE)