battery AUDI A4 1999 B5 / 1.G Airbag Service Workshop Manual

69-40


Airbags, servicing

Airbag system, safety precautions


WARNING!

Checking, removing, installing and servicing
may ONLY be performed by qualified
personnel.
Never perform tests using a test light or
multimeter.
Airbag system may only be tested when
installed in vehicle using VAG1551/VAG1552
scan tool.
Battery must be disconnected before
performing any work on airbag system.
Work can begin immediately after
disconnecting the battery.
When connecting the airbag system to a
voltage source, no one should be in the
vehicle interior.
Always install airbag units in the vehicle as
soon as they are removed from the
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69-53

Driver-side airbag unit ( m.y. 1998),
removing and installing


- Disconnect battery Ground (GND) strap.

Note:
Always follow airbag safety precautions when
working on airbag system components ( page
69
-40
).

-
Using T30 Torx bit, unbolt airbag unit on both left and right side of
steering wheel. Tightening torque: 6 Nm (53 in. lb)
- Carefully pull back airbag unit.
- Disconnect harness connector from airbag unit.

WARNING!
No one may be in vehicle when connecting battery Ground (GND)
strap. - Place airbag unit on suitable surface with impact padding facing up.
- When installing, make sure harness connector audibly engages
(clicks).
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- Switch ignition on and connect battery Ground (GND) strap.
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69-56


Installing
WARNING!
Make sure no one is in vehicle. - When installing, make sure connector audibly
engages (clicks).
- Switch ignition on and connect battery Ground
(GND) strap.
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69-59


Removing
Installing
Notes:
WARNING!
Make sure no one is in vehicle. 8 -
Spiral spring
9 -
Journal
10 -
Transportation protection
- Unbolt airbag unit from behind using
Torx wrench (T30).
- Remove airbag unit -3- and disconnect
harness connector -2-.
- Place airbag unit on appropriate surface
with impact padding facing up.
Make sure harness connector -2- audibly
engages (clicks). When installing airbag unit, first tighten
right Torx bolt.
- Switch ignition on and connect battery Ground
(GND) strap.
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69-62


Removing
WARNING!
Follow all safety precautions when working on
airbags page 69
-40
.
Installing
WARNING!
Make sure no one is in vehicle.
-
Unbolt airbag unit using Torx wrench (T30).- Disconnect harness connector - 2 -.
- Place airbag unit on appropriate surface with
impact padding facing up.
- Make sure harness connector - 2 - audibly
engages (clicks).
- Install airbag unit and tighten to 7 Nm (62 in. lb).
- Switch ignition on and connect battery Ground
(GND) strap.
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69-64


Spiral spring ( m.y. 1998), removing and
installing

WARNING!
Follow all safety precautions when working on
airbags page 69
-40
.
Repair Manual, Suspension, Wheels, Steering,
Repair Group 48

- Disconnect battery Ground (GND) strap.
- Wheels must be facing straight ahead.
- Remove airbag unit page 69
-53
.
- Remove steering wheel.- Remove bolts -5- (4x) from carrier unit -6-.
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69-70


Passenger-side airbag unit, removing and
installing

WARNING!
Follow all safety precautions when working on
airbags page 69
-40
.
WARNING!
Do NOT disconnect red 2-pin harness
connector on side airbag unit under any
circumstances. 1 -
Passenger-side airbag unit
Removing:
- Disconnect battery Ground (GND) strap.
Remove passenger-side knee bolster
page 68
-1 .
- Disconnect harness connector (tunnel
connection to rear and left of airbag unit)
Fig. 1
.
- First, disconnect both angle brackets -4-.
- Remove both angle brackets -3-.
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69-72


Note:
Always replace instrument panel after passenger-
side airbag has deployed.
WARNING!
Make sure no one is in vehicle. - Place airbag unit on suitable surface with
impact padding facing up.
Installing:
- Install airbag unit.
- Make sure harness connector -6- audibly
engages (clicks).
- Switch ignition on.
- Connect battery Ground (GND) strap.
2 -
Bolts (2x)
Always replace after airbag has deployed12 Nm (9 ft lb)
3 -
Support Always replace after airbag has deployed
4 -
Angle bracket
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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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