Audi Workshop Service and Repair Manuals > A4 Mk1 > Body | Body Self-diagnosis | Self diagnosis, V.A.G Inspection Service

Self-diagnosis of airbag system BTU (Basic Triggering Unit) with and without side airbag > < Renewing tyres/conditions for use of run-flat tyres

Body Self-diagnosis

Connect fault reader V.A.G 1551

Note:

The vehicle system tester V.A.G 1552 can be used instead of the fault reader V.A.G 1551, however a printout is not possible.

Test conditions

● Battery voltage at least 11 V
● Earth connections on engine and gearbox OK.
● Fuse OK.



‒ → Open rear ashtray and remove cover for diagnostic connector.

‒ → Connect fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3.

→ Indicated on display:

V.A.G SELF-DIAGNOSIS HELP

1 - Rapid data transfer 1)

2 - Flash code output 1)

1) appears alternately

→ If the display shows one of the messages, run through the fault finding procedure as described in the diagnosis management fault finding program.

Rapid data transfer HELP

No reply from control unit

=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder

Rapid data transfer HELP

Communication problem

Rapid data transfer HELP

K wire not switching to earth

Rapid data transfer HELP

K wire not switched to positive

Note:

If the display remains blank:

=> Fault reader operating instructions

‒ Switch on printer by pressing PRINT key
(indicator lamp in key lights up).
‒ Press key 1 for "Rapid data transfer".

→ Indicated on display:

Rapid data transfer HELP

Enter address word XX

Note:

Address word 00 is used to carry out the automatic test sequence, i.e. interrogation of the fault memory via rapid data transfer for all vehicle systems with self-diagnosis capability.

Body
Body Self-diagnosis
Self diagnosis, V.A.G Inspection Service
Connect fault reader V.A.G 1551

Self-diagnosis of airbag system BTU (Basic Triggering Unit) with and without side airbag > < Renewing tyres/conditions for use of run-flat tyres

Audi Workshop Service and Repair Manuals

A4 Mk1

Body Body Self-diagnosis Self diagnosis, V.A.G Inspection Service Connect fault reader V.A.G 1551

Body Body Self-diagnosis Self diagnosis, V.A.G Inspection Service Connect fault reader V.A.G 1551

Body
Body Self-diagnosis
Self diagnosis, V.A.G Inspection Service
Connect fault reader V.A.G 1551

Body
Body Self-diagnosis
Self diagnosis, V.A.G Inspection Service
Connect fault reader V.A.G 1551