Radio, Stereo, and Compact Disc: Service Precautions

Safety Precautions

If test and measuring equipment is required during road test, the following must be observed:

WARNING:
- To avoid risk of injury while performing measurements and tests during road test, the following must be observed:

Audi TT coupe:
- Only VAS 5051 or VAG 1551 must be used to read measuring value blocks. The tester must always be secured to the rear seat and must be operated from there by a second technician.
- Due to limited space, the passenger seat must be adjusted as far forward as possible and the seatback adjusted to the forward-most engaged position using the hand wheel. Unlocking lever of backrest must not be used to do so.

Audi TT Roadster:
- For the Audi TT Roadster, only VAG 1552 must be used with passenger-side airbag switched off at key switch.
- Deactivate passenger-side airbag via key switch in glove compartment
- Passenger-side airbag must be re-activated after completing work.

To prevent injuries to persons and/or damage to electronic and electrical components, note the following points:
- Always switch off the ignition before connecting or disconnecting test instruments.
- During some of the tests the control module may identify and record malfunctions as DTCs. The DTC memory should therefore be checked and (if necessary) erased after completing the tests and any repair work that may be required.
- Always switch off the ignition before connecting or disconnecting the battery; otherwise the transmission control module may be damaged.

Test requirements
- Fuses checked per wiring diagram
- VAS 5051 vehicle diagnostic, testing and information system or VAG 1551 scan tool connected.
- 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 -C- button to escape.
- In the operating mode 1 "Rapid data transfer" the function 00 "Automatic test sequence" can be used to check all vehicle control modules automatically.
- Switch on ignition.
- Switch on printer with the PRINT button (indicator lamp in button lights up).
- Press -1- button for "Rapid data transfer" mode.

Indicated on display

Rapid data transfer HELP
Insert address word XX

Address word for radio: 56

- Press buttons -5- and -6-.

Indicated on display

Rapid data transfer Q
56 - Radio

- Confirm entry with the -Q- button.

NOTE: While the On Board Diagnostic (OBD) is running the letters "DIAG" will appear on the radio unit display.

Up to m.y. 2001:
- Appears on display after approx. 5 seconds:

From m.y. 2002:
- Appears on display after approx. 5 seconds:

All vehicles:
- 8N0035186A: Part No. of radio
- 8E0053195B: Part No. of radio
- Radio: component designation
- concert NP2: component identification and manufacturer
- D01: software version installed in radio
- 0004: software version of radio
- Coding 00517: radio coding
- Coding 04632: radio coding
- WSC XXXXX: workshop code (dealership number)

NOTE: Check coding against coding table.

- Press -> button.

NOTE: If the display shows one of the messages reproduced here, run through the troubleshooting procedure as described in the troubleshooting section of the wiring diagram.

Indicated on display

Rapid data transfer HELP
control module does not answer

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

- An overview of the possible functions is printed out after pressing HELP button.
- Continue program sequence by pressing -> button.

On Board Diagnostic (OBD) functions
The following functions are possible:

- 01 - Checking Control Module Version.
- 02 - Check DTC Memory.
- Output Diagnostic Test Mode (DTM).
- Erase DTC Memory.
- End Output.
- Code Control Module.
- Read Measuring Value Block.
- Adaptation.