Technician Safety Information

Safety Precautions

If special testing equipment is required during test drive, note the following:

WARNING:
- To reduce the risk of accidents observe the following:
- During a road test in an airbag-equipped vehicle, the VAS5051 tester or the VAG1551 scan tool must always be fastened to and operated from the rear seat by a second technician.

To reduce the risk of injury to people and or damage to the electrical system and components, observe the following:
- Always switch ignition off before connecting or disconnecting test/measurement tools.
- It is possible that the control module will recognize a malfunction and store a DTC during some tests. After completing all tests and repairs, DTC memory should therefore be checked and if necessary erased.
- Always switch ignition off before disconnecting or connecting battery. Failure to do so may damage a control module.

Test requirements
- Check fuse for function according to wiring diagram.
- Connect VAS5051 tester or VAG1551 scan tool.
- Switch ignition on.

NOTE:
- If nothing is indicated on display, check voltage supply for VAG 1551 scan tool according to wiring diagram.
- Additional instructions can be called up via the HELP button on the scan tool.
- The -> button is used for advancing through the program sequence.
- An incorrect entry can be canceled using the C button.
- Function 00 "Automatic test sequence" can be performed in operating mode 1 "Rapid data transfer". This automatically checks all control modules in the vehicle.

- Switch ignition on.
- Switch printer on via the PRINT button (indicator lamp in button lights up).
- Press button -1- to select "Rapid data transfer" operating mode 1.

Indicated on display

Rapid data transfer HELP
Insert address word XX

Address word for navigation: 37
- Press buttons -3- and -7-.

Indicated on display

Rapid data transfer Q
37 - Navigation

- Press -Q- button to confirm input.

Indicated on display after approx. 5 seconds:

4B0919887A Navigation 0001 ->
Coding 00000 WSC 06812

- 4B0919887A: Part No. for navigation control module
- Navigation: component designation
- Software version of control module for navigation with CD drive
- Coding 00000: Coding not used
- WSC 06812: dealership number

Displayed in instrument cluster display:

DIAG.

- Press -> button.

Rapid data transfer HELP
Control module does not answer

If one of these messages is displayed, carry-out troubleshooting according to troubleshooting section in the wiring diagram.

Indicated on display

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

- Pressing the HELP button will print out an overview of all of the possible functions.
- Press the -> button to continue program sequence.

On Board Diagnostic (OBD) functions
The following functions are possible:
01 - Check Control Module Versions.
02 - Check DTC Memory.
03 - Output Diagnostic Test Mode.
05 - Erase DTC memory.
06 - End Output.
08 - Read Measuring Value Block.
10 - Adaptation.