1997 AUDI A4 APB Engine Motronic Syst

01-7

Mode under Address word 33:
Mode 1: Transmit diagnostic data Switch ignition on or let engine run at idle
Mode 2: Transmit operating conditions Switch ignition on or let engine run at idle
Mode 3: Check DTC Memory Switch ignition on or let engine run at idle
Mode 4: Erase diagnostic data Switch ignition on or let engine run at idle
Mode 5: Output of oxygen sensor signals Switch ignition on or let engine run at idle
Mode 6: Transmit measured values Switch ignition on or let engine run at idle
Mode 7: Check DTC Memory Switch ignition on or let engine run at idle
Mode 8: Check tank leak test Switch ignition on or let engine run at idle
Mode 9: Read out vehicle information Let engine run at idle Mode 1 to 9 can be selected under address word 33.

Individual measured values can be read out under mode 1. Mode 1 is not recommended for authorized Audi service
centers, since the data can be obtained much more accurately under address word 01 function 04 or function 08.
Mode 2 displays operating conditions, for which malfunctions are recognized.
With mode 3 the DTC memory will be checked and with mode 4 the DTC memory will be erased.
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01-8

Mode 5 displays the static dimensions of the oxygen sensors, which are legally required. Since these dimensions are not
directly relevant to oxygen sensor diagnostics, mode 5 is insignificant for the authorized Audi center.
With mode 6 all measured values can be checked from components and systems that are not constantly monitored.
Using mode 7, DTCs can be checked for which the Malfunction Indicator Light (MIL) is not yet lit (MIL is not on, no DTCs
under mode 3).
Under mode 8 the tank leak test will be checked.
With mode 9 the following vehicle information can be read out: Vehicle Identification Number (VIN), Part number and
program/data level of the engine control module and the check sum (this value is a internal calculated value).
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01-9

Vehicle diagnostic, testing and
information system VAS5051 or
VAG1551, connecting and selecting
functions


Requirements

Fuses for engine electronics OK
Fuel pump relay OK
Battery voltage at least 11 V
Ground (GND) connection for engine and
transmission OK

- Switch ignition off.

Note:
The Data Link Connector (DLC) is located below the dash, to the left of
the steering column. - Connect vehicle diagnostic, testing and information system VAS5051
with VAS5051/1 diagnostic cable. As an alternative, connect VAG1551
scan tool with VAG1551/3B diagnostic cable.
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01-10

WARNING!

When performing a road test and checks, the
vehicle diagnostic, testing and information
system VAS5051 as well as the VAG1551
may be secured only on rear seat, from
where it is to be operated by a second
technician.
Please follow safety precautions Page 24
-1

Note:
Only the procedure for OBD VAG1551 is
described below. For details of how to use the
vehicle diagnostic, testing and information
system VAS5051, please refer to its operating
manual. VAG - On Board Dia
gnostic
HELP
1 - Rapid data transfer*2 - Blink code output*

Indicated on display
* Appears alternately
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01-11

- If no display appears, check diagnostic
cables:

Electrical Wiring Diagrams, Troubleshooting &
Component Locations Depending on the function required:

- Switch ignition on.

or

Start engine Page 01
-6 , table of available
functions.

- Switch on printer with PRINT button (indicator
light in button lights up).

- Press button -1- to select "Rapid data transfer"
operating mode. Rapid data transfer
HELP
Insert address word XX

Indicated on display:
Rapid data transfer
Q
01 - En
gine Electronics

- Press buttons -0- and -1- to insert "Engine electronics" address word
01.
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- Press -Q- button to confirm input.
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01-12

Rapid data transfer
HELP
Control module does not answer

If the display shows one of the messages reproduced here, run through
the troubleshooting procedure as described in the Electrical Wiring
Diagrams, Troubleshooting and Component Location binder.
Electrical Wiring Diagrams, Troubleshooting and Component Locations
Rapid data transfer
HELP
K wire not switching to Ground

Rapid data transfer
HELP
K wire not switching to B+

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01-13

Control module identification (example) 4D0907551.. 2.7L V6/5VT
G 0002..
Codin
g 06711
WSC 06388

The display on VAG1551 will show the control module identification, for
example: 1)
The engine is a so called Biturbo engine, that means the engine is
equipped with two turbo chargers. "Bi" (latin) stand for two. 4D0907551... Engine Control Module (ECM) Part No.
2.7 L Engine displacement
V6 / 5VT Engine configuration
(V6 5-valve Turbo
1)

G or no
display "G" for vehicles with Cruise control system or not 0002ECM Software version Coding
06711 Coding of ECM WSC 06388Dealership code of VAG1551 with which the last
coding was performed
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e=re
pair&id=AUDI.B5.FU04.01.1