Instrument cluster On Board Diagnostic (OBD), initiating

Additional information

Wiring Diagrams
Technical Bulletins

Scan Tool (ST) and test equipment safety precautions

WARNING:

Due to weight, size and need for manual operation of test instruments while vehicle is driven on public roads, instrument must be used only with a Driver operating the vehicle and an Instrument Operator operating the test equipment.
Do not use Instrument with Driver only. Always use two persons to conduct test.
Do not place Instrument on lap of Driver or front seat passenger because emergency stop may dislodge Instrument and cause airbag deployment with risk of injury to Instrument Operator.

WARNING:

Use of Instrument in Audi TT Coup:

Place Instrument in rear seating area and secure by available safety belt.
Instrument Operator must be seated in the other rear seating position, after sliding front passenger seat and moving the seat back as far forward as possible. Do not activate the seat back release lever.
Instrument Operator must wear safety belt.

Use of Instrument in Audi TT Roadster:

Use only Instrument VAG 1551 Scan Tool (ST) or VAS 5052 Vehicle Diagnostic and Service System. DO NOT USE VAS 5051.
Before test, deactivate passenger's airbag using key operated switch in glove compartment.
Instrument Operator must be seated on passenger seat with safety belt worn.
Place Instrument in foot well in front of passenger seat in a manner allowing the Operator to use the Instrument in a safe manner.

After completion of test, re-activate front passenger airbag.

CAUTION:

To prevent damage to electronic and electrical components, note the following:

Always switch off the ignition before connecting or disconnecting test instruments.
During some of the tests the control module may identify and record DTCs. The Diagnostic Trouble Code (DTC) memory should therefore be checked and (if necessary) erased after completing the tests and any repair work that may be required.

Test requirements

Check fuses using wiring diagram
Always check coding of instrument cluster according to coding table. Refer to Code Control Module (function 07)
Connect VAG 1551/1552 Scan Tool, VAS 5051 Vehicle Diagnostic, Testing and Information System or VAS 5052 Vehicle Diagnostic and Service System. Refer to VAG 1551/1552 Scan Tool (ST), VAS 5051 Vehicle Diagnostic Testing and Information System or VAS 5052 Vehicle Diagnostic and Service System, connecting and selecting functions
Ignition switched on

NOTE:

If the display remains blank, check voltage supply of VAG 1551 according to wiring diagram.
Additional operating instructions can be called up with the scan tool HELP button.
The → button serves to advance the program sequence.
If an incorrect entry is made, press button C to escape.
In the operating mode 1 "Rapid data transfer" the function 00 can be used to perform an "Automatic test sequence." This will check all control modules in the vehicle automatically.

Switch on printer with the Print button (indicator lamp lights up).
Press button -1- for "Rapid data transfer" mode.

Rapid data transfer HELP
Input address word XX

Indicated on display:

Address word for instrument cluster: 17

Press buttons -1- and -7- to select "Instrument Cluster" address word 17.

Rapid data transfer Q
17 - Instrument cluster

Indicated on display:

Press -Q- button to confirm input

8N1920880... INSTR+IMMOB. M73 D03 →
Code 06244 WSC XXXXX

After about 5 seconds, the following appears on the display (example only):

8N1920880: Part no. of instrument cluster
INSTR+IMMOB.: Instrument cluster plus anti-theft immobilizer component designation
M73: Manufacturer code for Magneti Marelli
D03: Software version of instrument cluster

Coding 06244: Coding of instrument cluster
WSC XXXXX: Workshop code

NOTE: Check coding according to coding table. Refer to Code Control Module (function 07) .

Press → button.

Ident-no. Immob.: AUZ5Z0W1000071 →

Indicated on display: (example only):

AUZ5Z0W1000071: 14-digit ident. no. for immobilizer control module

Press → button.

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 wiring diagram.

Refer to Wiring Diagrams, Troubleshooting & Component Locations binder

Rapid data transfer HELP
Error in communication link

Rapid data transfer HELP
K wire not switching to Ground

Rapid data transfer HELP
K wire not switching to B+

Rapid data transfer HELP
Select function XX

Indicated on display:

After the HELP button is pressed, a list of the possible functions is printed out.
Press → button to advance the program sequence.

NOTE: The following OBD program information applies to instrument clusters on vehicles through m.y. 2000 only. OBD program information for instrument clusters from m.y. 2001. Refer to General Information .

On Board Diagnostic (OBD) functions

The following functions are possible:

02 - Check DTC Memory. Refer to Diagnostic Trouble Code (DTC) Memory, checking (function 02) .

03 - Output DTM. Refer to Output Diagnostic Test Mode (DTM) (function 03) .

05 - Erase DTC Memory. Refer to Diagnostic Trouble Code (DTC) Memory, erasing .

06 - End Output. Refer to End Output (function 06) .

07 - Code Control Module. Refer to Code Control Module (function 07) .

08 - Read Measuring Value Block. Refer to Read Measuring Value Block (function 08) .

10 - Adaptation. Refer to Adaptation (function 10) .

11 - Log-in Procedure. Refer to Adaptation (function 10) .