Audi A4. Body repair manual - part 18
Airbags, servicing
Airbag control module -J234-, removing
and installing
- Disconnect battery Ground (GND) strap.
- Remove front center console page 68-30 .
- 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-.
Note:
If the airbag control module is replaced, the new control module must be
coded.
11/19/2002
Airbags, servicing
Side airbag, removing and installing
WARNING!
Follow all safety precautions when working
on airbags page 69-40 .
Before starting work on seats, connect
VAS5094 airbag adapter page 72-9 .
Removing
- Disconnect battery Ground (GND) strap.
- Remove seat page 72-2 .
- Remove outer trim pieces and trim on side of
seat page 74-16 .
- Remove harness connector -2-.
- Disconnect Ground (GND) strap from harness
connector -2-, chamber 4.
- Disconnect harness connector for side airbag -1-
from connector strip -5- by pressing on retaining
tab.
11/19/2002
Airbags, servicing
- Disconnect intermediate connector for seatback
heater -6-.
- Disconnect harness connector for side airbag -1-
from outer edge of seat Fig. 1
- Remove side airbag unit page 69-79 .
1 - Harness connector for side airbag
2 - Harness connector for sensor mat
3 - Retaining tab
4 - Harness connector for seat heater
5 - Connector strip
6 - Intermediate connector for seatback
heater
7 - Airbag number sticker
11/19/2002
Airbags, servicing
8 - Bar in connector
Installing:
WARNING!
To ensure that the side airbag functions
properly, when working on backrest cover,
always install new upholstery clips in the
same locations they were removed from.
Only use seat covers approved for use with
side airbags.
- Install harness connector -2- at same
location as when removed and ensure
that bar -8- points toward tunnel.
- Switch ignition on.
- Close doors.
WARNING!
Make sure no one is in vehicle.
- Connect battery Ground (GND) strap.
11/19/2002
Airbags, servicing
Fig. 1
Wiring location on outer edge of seat
- Remove backrest cover page 74-12 .
- Unclip clip -2- (1x).
WARNING!
When installing side airbag cable -1-, make sure that it doesn't rub
against any moving parts.
11/19/2002
Airbags, servicing
Side airbag unit, removing and installing
WARNING!
Before starting work on seats, connect
VAS5094 airbag adapter page 72-9 .
Removing
- Remove bolts -2- (2x).
WARNING!
Do NOT reuse bolts -2-. Replace the metal bolts with M5 bolts and
nuts supplied.
Drill mounting holes to 5.5 mm.
Tightening torque: 5.5 Nm (49 in. lb)
Note:
Illustration is shown without anti-crush fleece.
- Carefully disconnect side airbag -1- at retaining clip -5-.
- Remove side airbag -1-.
- Place airbag unit on appropriate surface with impact padding facing up.
11/19/2002
Airbags, servicing
Installing
Note:
Do not cut anti-crush fleece -4- in area near retaining clip -5-.
- Remove anti-crush fleece -4- before drilling.
- Drill out mounting holes to 5.5 mm.
- Pull anti-crush fleece -4- over seat backrest frame.
- Clip side airbag -1- with anti-crush fleece into place.
- Install bolts -2-, pull up anti-crush fleece -4-, install nuts and tighten to
5.5 Nm (49 ft lb).
- Remove expiration date sticker from airbag unit and place over old
sticker on driver's door.
- If vehicle does not have label, note airbag replacement in maintenance
plan.
- Remove airbag number sticker from airbag unit and place over old
sticker on seat pan page 69-75 , item -7-.
11/19/2002
Airbags, servicing
Side airbag for Recaro seat, removing and
installing
WARNING!
Follow all safety precautions when working
on side airbag.
Before starting work on seats, connect
VAS5094 airbag adapter page 72-9 .
1 - Backrest
2 - Side airbag unit
Removing:
- Remove Recaro seat page 72-25 .
- Remove mounting trim page 72-41 .
- Disconnect yellow airbag harness
connector under seat.
- Disconnect black Ground (GND) harness
connector for airbag, located under seat.
- Unbolt bolt -4- on retainer -6- on
underside of side airbag unit -2-.
- Push side airbag unit -2- downward.
- Carefully pull out side airbag unit -2-.
11/19/2002
Airbags, servicing
Installing:
WARNING!
Make sure vehicle is not occupied.
Note:
Always replace bolt -4-.
- 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
11/19/2002
Airbags, servicing
7 - Locating holes
11/19/2002
Airbags, servicing
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.
- Removing seat page 72-2 .
- Remove seat cover page 74-15 .
Note:
Sensor mat is only available as a replacement part which includes seat
heater and seat cushion.
- 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.
11/19/2002
Airbags, servicing
- 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
11/19/2002
Airbags, servicing
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.
- Test each sensor group by pressing on them with your hand until
display changes from "not occupied" to "occupied" (max. load 12 kg).
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.
11/19/2002