1998 AUDI A4 sensor

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.
Pa
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gs, servicin
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11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.BD03.69.3

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
Pa
ge 54 of 75 Airba
gs, servicin
g
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD03.69.3

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).
Pa
ge 55 of 75 Airba
gs, servicin
g
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD03.69.3

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.
Pa
ge 56 of 75 Airba
gs, servicin
g
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD03.69.3

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.
Pa
ge 57 of 75 Airba
gs, servicin
g
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD03.69.3