AUDI A4 1999 B5 / 1.G Airbag Service Repair Manual

69-82


WARNING!
Make sure vehicle is not occupied.
Note:
Always replace bolt -4-. Installing:
- Install side airbag unit -2- so that
engaging pins -3- engage in locating
holes -7-.
- Push side airbag unit up to stop.
- Tighten new bolt -4- on side airbag unit
to 10 Nm (7 ft lb).
- Install airbag cable -5-.
- Connect yellow harness connector of
airbag cable and black harness
connector for airbag Ground (GND) strap
underneath seat.
- Reinstall mounting trim.
3 -
Engaging pins
4 -
Bolt
10 Nm (7 ft lb)
5 -
Airbag cable
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6 -
Retainer
7 -
Locating holes
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69-83

Seat occupant sensor, removing and
installing


WARNING!

Before starting work on seats, connect VAS
5094 airbag adapter page 72
-9 .

Note:
The seat occupant sensor will be used at a later
time.

Note:
Sensor mat is only available as a replacement part which includes seat
heater and seat cushion. - Removing seat page 72
-2 .
- Remove seat cover page 74
-15
.
- Press retaining tabs -3- and disconnect connector -1- for seat occupant
sensor from connector strip -4-.
- Disconnect Ground (GND) strap from harness connector -1- (location -
4-).
- Unclip harness connector -5- and disconnect intermediate connector to
backrest.
- Remove seat cushion along with sensor mat and seat heater from seat
pan.
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69-84

- When installing, make sure bar -2- points toward
tunnel.

- After installing sensor mat, test sensor mat
function using VAG1551 Scan Tool (ST) page
69
-84
.

Testing sensor mat function

Note:
Illustration is shown without cover.

- Remove any seat mats before testing sensor
mats.

- Connect
VAG1551
scan tool
Repair Manual, Body
On Board Diagnostic (OBD), Repair Group 01
.

-
Select
Read
Measuring
Value
Block
(function
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08) and
input
display
group
number
003
Repair Manual, Body
On Board Diagnostic (OBD), Repair Group 01
.
Read Measuring Value Block number 2 for seat
occupant sensor passenger side indicates: not
occupied.

Note:
If "occupied" is indicated, even though you are not pressing sensor group,
either the sensor mat is malfunctioning or the seat cover is too tight. - Test each sensor group by pressing on them with your hand until
display changes from "not occupied" to "occupied" (max. load 12 kg).
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69-85

Crash sensor for side airbag, removing
and installing


WARNING!

Before starting work on seats, connect VAS
5094 airbag adapter page 72
-9 .

Notes:

A crash sensor for the side airbag is located
under both the driver's and passenger's seats.
Both crash sensors for the side airbags are
identical.
When installed, the arrow points down.
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69-86

Removing

- Disconnect battery Ground (GND) strap.

- Remove front seat page 72
-2 .

- Remove lower A-pillar trim page 70
-72
.

- Unclip sill molding and fold upward.

- Pull up floor mat -4- near sensor.

- Disconnect harness connector -2- from crash
sensor for side airbag -1-.

Installing
WARNING! - Remove bolts -3- (2x).
Tightening torque: 6 Nm (53 in. lb)
- Remove crash sensor for side airbag -1-.
- Switch ignition on.
- Close doors.
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Make sure no one is in vehicle.
- Connect battery Ground (GND) strap.
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69-87

Side curtain protection airbag, servicing


Special tools and equipment

VAS 5122

VAG 1783
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69-88


Side curtain protection airbag (sedan),
removing and installing

WARNING!
Follow all safety precautions when working on
airbags page 69
-40
and side curtain airbag
page 69
-49
.
1 -
Side curtain airbag
Removing:
- Remove upper A-pillar trim panel
page 70
-88
.
- Remove upper B-pillar trim without
loosening seat belt page 70
-91
.
- Remove upper D-pillar trim page 70
-
96
.
- Remove bolts - 4 - (2x).
- Unclip side curtain airbag at clip - 3 -.
- Fold front portion of side curtain airbag
toward rear and secure at Velcro strip
(inset). - Disconnect harness connector for side
curtain airbag Fig. 2
.
- Remove bolts - 8 - (2x).
- Remove igniter - 5 - at clip - 7 -.
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