1999 AUDI A4 module

69-42

Airbag units, replacing after an accident


Accident with activation of airbag and belt
tensioners (up to and including airbag 7)
Airbag control module must be replaced after
every activation of airbag and belt tensioners

Accident with activation of airbag and belt
tensioners (for airbag 8) (integrated as of
10/98)

Notes:

For vehicles with airbag 8, display will indicate
airbag front and side or airbag front and side
curtain.
Airbag control module can be used for up to
three side-/side curtain airbag and/or belt
tensioner activations.
After the third activation, the DTC "Control
Module Malfunctioning" will appear.
Airbag control module must be replaced:
After driver-side and/or passenger-side airbag
deployment.

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If housing is damaged.
If there is a deformation of body channel, within
a circumference of 200 mm around control
module.
After three side-/side curtain airbag
deployments.
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69-45

Also
All seatbelts with activated belt tensioners.
On Board Diagnostic will recognize if belt
tensioners have been activated for airbag V, 7
and 8.

A - if airbag control module has been
triggered:
Front seat belt tensioners: Read Measuring Value Block 1
1
2
3
4

Repair Manual, Body On Board Diagnostic (OBD), Repair Group 01

Rear seat belt tensioners: - Read Measuring Value Block display group 1:
Activated belt tensioners can be identified by "0111" or "too large"
indicated on display.
Read Measuring Value Block 2
1
2
3
4

Repair Manual, Body On Board Diagnostic (OBD), Repair Group 01
- Read Measuring Value Block display group 2:
Activated belt tensioners can be identified by "0111" or "too large"
indicated on display.
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69-46

B - If airbag control module is replaced:

- Check DTC memory:

Repair Manual, Body On Board Diagnostic
(OBD), Repair Group 01


Activated belt tensioners can be identified by the
DTC: "Ignitor for belt tensioner - resistance is too
high"

- If necessary (visual check) also replace: all
damaged components.

Accident without airbag deployment
If airbag Malfunction Indicator Lamp (MIL) -K75-
does not indicate a DTC, then airbag
components do not need to be replaced. Check
seat belts separately.
After replacing airbag units or the control module,
attach label (only tear-off strip) to registration
card and send in registration card.
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69-51


Airbag component locations, overview

Repair Manual, Body On Board Diagnostic
(OBD), Repair Group 01
1 -
Driver-side airbag unit
Removing m.y. 1998 page 69
-53
Removing m.y. 1998 page 69
-54
2 -
Driver-side airbag unit (sport steering
wheel)
Removing m.y. 1998 page 69
-58
Removing m.y. 1998 page 69
-61
3 -
Airbag control module -J234-
Removing and installing page 69
-74
4 -
Passenger-side airbag unit
Removing page 69
-70
Locking and activating (adaptation)
5 -
Seat occupant sensor
Removing and installing page 69
-83
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69-74

Airbag control module -J234-, removing
and installing


- Disconnect battery Ground (GND) strap.

- Remove front center console page 68
-30
.

Note:
If the airbag control module is replaced, the new control module must be
coded. - Disconnect securing bracket at harness connector -3-.
- Disconnect harness connector -3- from control module -1-.
- Remove nuts -2- (3x).
Tightening torque: 6 Nm (53 in. lb)
- Remove airbag control module -J234-.
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