Volkswagen Golf / Golf GTI / Jetta. Manual — part 828

01-89

Any system malfunctions that are
stored will be displayed one after the
other and printed out. The V.A.G
1551 will then transmit the next
address word.

V.A.G - ON BOARD DIAGNOSTIC HELP

1 - Rapid data transfer

2 - Blink code output

Indicated on display

1)

1)

Operating modes 1 and 2 are

displayed alternately

Note:

If a DTC is recognized:

1 . Repair malfunction

2. Erase DTC memory (function

05).

3. Check DTC memory again

(function 02).

Airbag system, On Board Diagnostic (OBD)

13/2/2005

01-90

Convenience system
(vehicles with power
windows), On Board
Diagnostic (OBD)

Functional description

The locking units located in the doors (door

lock) have an electric motor.

The motor locks the door and also takes

care of the "Safe" condition, i.e. after locking
at an external lock (door lock, tailgate, radio
remote control) the vehicle is protected
against theft and can no longer be unlocked
from the interior. The feedback on the
respective condition in control module occurs
via the contact switch in the locking unit.

All the known convenience functions can be

performed with the electric convenience
system, interior lights control, ATA with
interior monitoring (see description of system
on

Page 01-94

), electric windows, mirror

and the radio remote control.

If the Airbag Control Module is triggered, a

signal is sent to the convenience control
module to unlock the doors.

Convenience system (vehicles with power windows), On Board Diagnostic (OBD)

13/2/2005

01-91

The Convenience System Control

Module -J393- is located under the
instrument panel and is secured with
a bracket to the steering column. It is
equipped with a DTC memory. The
On Board Diagnostic (OBD)
connection is located under the
driver's knee bar to left of the
steering wheel.

The control module recognizes
DTC's and malfunctions in the
central locking convenience system
(convenience system includes
central locking, anti-theft alarm,
electric windows, radio wave remote
control, mirror) and stores them in a
non-volatile memory.

Testers V.A.G 1551 and 1552 can
be used to check the DTC memories
and code the control modules as
well as the function On Board
Diagnostic (OBD) of the VAS 5051.

The function "Guided
Troubleshooting" of the VAS 5051
should be used for troubleshooting in
diagnostic capable systems. Using
this system a systematic malfunction
check is guaranteed, from the fuses
via wiring, connections in the current
path.:

Operating instructions for VAS

5051 Vehicle Diagnosis, Testing and
Information System.

Convenience system (vehicles with power windows), On Board Diagnostic (OBD)

13/2/2005

01-92

The malfunction information displayed is

used to refer to a DTC table with notes on
the possible causes for directed repair
measures.

Malfunctions which can be attributed to a

temporary open circuit in the wiring or a
loose contact, will also be stored. These
malfunctions will be displayed as sporadic
DTCs "SP".

Only statistical malfunctions are considered:

Central locking inoperative

Mirror positioning motor inoperative

Electric window positioning motor

inoperative

CAN-bus communication inoperative

Note:

Before changing a component erase DTC

memory, perform functional checks and
check DTC memory again.

Convenience system (vehicles with power windows), On Board Diagnostic (OBD)

13/2/2005