68
The components of the immobiliser are as fol-
lows:
– The immobiliser control unit is integrated
in the dash panel insert.
– The warning lamp in the dash panel insert
– The reading coil on the ignition lock
– The adapted ignition key
– The engine control unit
The immobiliser
is an electronic anti-theft protection device of
the 3rd generation and will be gradually pha-
sed into the Audi TT. It prevents the vehicle
from being operated by unauthorised persons
by intervening in the engine control unit.
The aim of the 3rd generation immobiliser is
to incorporate the engine control unit actively
into evaluation and monitoring processes.
Electrics
SSP207/88
The 3rd generation immobiliser differs from
the previous immobiliser in the following
respects:
– Variable code evaluation in the engine
control unit and immobiliser control unit.
The engine control unit has an equation
which calculates the generated variable
code in the same way as in the immobiliser
control unit.
Always use the corresponding Work-
shop Manual when carrying out
repairs.
30
20
10
40
50
60
0
!
P
ABS
AIR
BAG
90
°
C
50
70
10
30
50
70
100
140
180
220
260
20
40
60
80
160
200
240
120
1/2
1/1
0
130
SSP207/90
W
SSP207/89
After teaching in the electronic module
of the key transponder once, the
immobiliser key is paired up with the
immobiliser and cannot be used for
any other immobiliser.
