weight AUDI A4 1999 B5 / 1.G Suspension Wheel Alignment Workshop Manual

44-7

Suspension codes, checking
requirements


Information on weight codes (code number)

From m.y. 1998 , spring/shock assemblies will
be classified according to weight codes (code
number) so that suspension components can be
matched easily.
The spring/shock assembly installed in the
vehicle is indicated by the weight code on the
vehicle data label.

Specified values for wheel alignment
1BA = Standard suspension
1BC = Special purpose suspension
Special purpose vehicles suspension -1BC- have
the same specified values for wheel alignment as
the standard suspension -1BA-.
Pa
ge 3 of 37 Wheel ali
gnment
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU01.44.2

44-9

Requirements

Test equipment must be properly adjusted
and attached to vehicle (refer to equipment
manufacturer's instructions)
Equal tread depth for both tires on each axle,
with difference between two not more than 2
mm (0.079 in.)
Tires inflated to correct pressure
Sliding plates and turntables not positioned
against any stop when checking wheel
alignment
Vehicle at correct curb weight 1)
Vehicle accurately positioned, suspension
bounced and rocked several times and
allowed to settle
Suspension, steering and steering linkage in
proper condition with no damage or
excessive play
Carry out axial wheel run-out compensation.
Since some wheel run-out is allowable,
Pa
ge 5 of 37 Wheel ali
gnment
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU01.44.2

checking alignment without first
compensating for axial wheel run out may
indicate that the toe-in tolerance is already
exceeded. If this is the case it is not possible
to set toe-in without first compensating for
wheel run-out

1) Curb weight is defined as: the weight of the
vehicle ready for the road (fuel tank completely
full, spare wheel, vehicle tool kit and vehicle jack
all in specified positions).
Pa
ge 6 of 37 Wheel ali
gnment
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU01.44.2

44-11
Wheel alignment specifications (front-wheel-drive vehicles)


Specifications valid for all engine versions
Front axle
Standard suspension
(1BA)
Special suspension
(1BC)
Heavy duty
suspension (1BP) Sport suspension
(1BE) Heavy duty suspension
(1BB), (1BT1))
Camber
-25 25
-40 25
-15 25
-30 25 1)
Maximum allowable difference in camber
between two sides 30
30
30
Toe setting for each wheel (curb weight)
+10 2
+10 2
+10 2
Toe check value for each wheel (curb
weight) +10 5
+10 5
+10 5
Toe constant for each wheel (setting
value) +7 2
+7 2
+7 2
Toe constant for each wheel (check
value) +7 7
+7 7
+7 7
Toe-out on turns at 20
-1 20 30
-1 20 30
-1 20 30
1) Applies only to vehicles with heavy duty suspension (1BT)
Pa
ge 9 of 37 Wheel ali
gnment
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU01.44.2

44-13
Wheel alignment specifications (all-wheel-drive vehicles)


Specifications valid for all engine versions
Front axle
Standard suspension
(1BA)
Special suspension
(1BC)
Heavy duty
suspension (1BP) Sport suspension
(1BE) Heavy duty suspension
(1BB), (1BT1))
Camber
-25 25
-40 25
-15 25
-30 25
Maximum allowable difference in camber
between two sides 30
30
30
Toe setting for each wheel (curb weight)
+10 2
+10 2
+10 2
Toe check value for each wheel (curb
weight) +10 5
+10 5
+10 5
Toe constant for each wheel (setting
value) +7 2
+7 2
+7 2
Toe constant for each wheel (check
value) +7 7
+7 7
+7 7
Toe-out on turns at 20
-1 20 30
-1 20 30
-1 20 30
1) Applies only to vehicles with heavy duty suspension (1BT)
Pa
ge 11 of 37 Wheel ali
gnment
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU01.44.2

44-15
Wheel alignment specifications (front-wheel-drive vehicles with aluminium mounting bracket)


Specifications valid for all engine versions
Front axle
Standard suspension
(1BA)
Special suspension
(1BC)
Heavy duty
suspension (1BP) Sport suspension
(1BE) Heavy duty suspension
(1BB), (1BT1))
Camber
-35 25
-50 25
-20 25
-30 25
Maximum allowable difference in camber
between two sides 30
30
30
Toe setting for each wheel (curb weight)
+10 2
+10 2
+10 2
Toe check value for each wheel (curb
weight) +10 5
+10 5
+10 5
Toe constant for each wheel (setting
value) +9 2
+9 2
+9 2
Toe constant for each wheel (check
value) +9 7
+9 7
+9 7
Toe-out on turns at 20
-1 20 30
-1 20 30
-1 20 30
1) Applies only to vehicles with heavy duty suspension (1BT)
Pa
ge 13 of 37 Wheel ali
gnment
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU01.44.2

44-16
Wheel alignment specifications (all-wheel-drive vehicles with aluminium mounting bracket)


Specifications valid for all engine versions
Front axle
Standard suspension
(1BA)
Special suspension
(1BC)
Heavy duty
suspension (1BP) Sport suspension
(1BE) Heavy duty suspension
(1BB), (1BT1))
Camber
-35 25
-50 25
-20 25
-30 25
Maximum allowable difference in camber
between two sides 30
30
30
Toe setting for each wheel (curb weight)
+10 2
+10 2
+10 2
Toe check value for each wheel (curb
weight) +10 5
+10 5
+10 5
Toe constant for each wheel (setting
value) +9 2
+9 2
+9 2
Toe constant for each wheel (check
value) +9 7
+9 7
+9 7
Toe-out on turns at 20
-1 20 30
-1 20 30
-1 20 30
1) Applies only to vehicles with heavy duty suspension (1BT)
Pa
ge 14 of 37 Wheel ali
gnment
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU01.44.2

44-17
Wheel alignment specifications, sport suspension (1BD)

Front axle
Sport suspension
(1BD)
Camber
-50 25 Maximum allowable difference in camber between two sides
30 Toe setting for each wheel (curb weight)
+10 2 Toe check value for each wheel (curb weight)
+10 5 Toe constant for each wheel (setting value)
+7 2 Toe constant for each wheel (check value)
+7 7 Toe-out on turns at 20
-1 30 30

Rear axle
Sport suspension
(1BD)
Camber
-55 15
Maximum allowable difference in camber between two sides
30 Overall toe
+8 5 Maximum allowable difference in direction of travel relative to longitudinal vehicle center line
(thrust angle) 10
Pa
ge 15 of 37 Wheel ali
gnment
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU01.44.2

44-19

Wheel alignment, mandatory sequence
of operations for checking


Overview of sequence of operations for
measuring wheel alignment

Vehicle must only be measured at curb
weight

Note:
Exception: when measuring the toe-in curve as
described in the alignment program instructions.

The following work sequences must be
adhered to

1 - Check front axle camber centering and
adjust if necessary page 44
-24
.

2 - Check rear axle camber and adjust if
necessary:

FWD vehicles page 44
-20

AWD vehicles page 44
-22

3 - Check rear axle and adjust if necessary:
Pa
ge 17 of 37 Wheel ali
gnment
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU01.44.2

FWD vehicles page 44
-21

AWD vehicles page 44
-23

4 - If necessary, check toe-in curve on front
axle.

To determine if the toe-in curve or toe
constant "S" needs adjusting table on
page 44
-10
and also page Page 44
-27
.

5 - Check front axle toe with vehicle at curb
weight and adjust if necessary page 44
-38
.
Pa
ge 18 of 37 Wheel ali
gnment
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU01.44.2