immobilizer AUDI A4 2000 B5 / 1.G APB Engine Ignition System Checking

28-1


Ignition system, checking

General notes on ignition system


Always switch off the ignition before connecting
or disconnecting the battery, otherwise the
engine control module may be damaged.
The engine control module is equipped with On
Board Diagnostic (OBD).
For trouble-free operation of the electrical
components a voltage of at least 11.5 V is
necessary.
During some of the tests it is possible that the
control module will detect and record a
malfunction. The DTC memory must therefore
be checked and if necessary erased when all
tests and repair work have been completed.
After completing troubleshooting, repairs or
component tests, it is possible that the engine
will start, run for a short period and then cut out.
If this happens it may be that the immobilizer is
blocking the engine control module. In such
cases the DTC memory must be checked and if
necessary the control module must be adapted.
Pa
ge 1 of 64 I
gnition s
ystem, checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.28.1