On Board Diagnostic General
General service notes
Refer to safety precautions before diagnostics.
Equipment features:
- Coupled navigation and usage of satellite-navigation data.
- User guidance for target entry and function selection via display in instrument cluster.
- Active target guidance by driving suggestions via arrow symbols in display of instrument cluster.
- Acoustic driving suggestions.
- Name display of street where vehicle is being driven.
- Distance display from current location to target.
- Display of time of arrival.
Function description
The Audi navigation system III processes the signals of the world wide satellite navigation system GPS (Global Positioning System).
After start of operation, the vehicle location is determined with help from the signals for the satellite navigation system GPS.
If the vehicle is located in an area that is not recognized by the navigation-CD (country, city or street), the display "OFF ROAD" or "OFF MAP" appears in the display of the instrument cluster. Then only the straight line distance and direction to target will be displayed, since the navigation system cannot compare the GPS signals and the vehicle measuring values with the stored information in this case.
Driving directions are not only played back acoustically (language), but are also represented as visual driving suggestions (arrows, turning suggestions) on the combination center display.
The navigation system is equipped with a DTC memory. If interference occurs in the monitored components or wires, these will be displayed in DTC memory with indication of malfunction type.
Test requirements:
- Check fuse for function according to wiring diagram.
- VAS5051 or VAG1551 connected.
- Ignition switched 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.
- In "Rapid data transfer" the Function 00 "Automatic Test Sequence" can be selected. This automatically checks all control modules installed in the vehicle.
- Switch on ignition.
- Switch printer on via the print-button (indicator lamp in button lights up).
- Press button 1 to select "Rapid data transfer" mode.
Indicated on display
Rapid data transfer HELP
Enter 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 number of control module for navigation (see also parts program)
- Navigation: component designation
- 0001: Software version of control module for navigation with CD drive
- Coding 00000: Coding not used
- WSC 06812: dealership number
Displayed in display of instrument cluster:
DIAG.
- Press -> button.
- If display shows one of the following messages, carry out troubleshooting procedure as described in troubleshooting program for diagnostic wiring.
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+
Indicated on display
Rapid data transfer HELP
Select function XX
After the HELP button is pressed, a list of the possible functions is printed out.
- Press -> button to advance through program sequence.
On Board Diagnostic (OBD) functions
The following functions are possible:
01 - Check control module version.
02 - Check DTC Memory.
03 - Output Diagnostic Test Mode (DTM).
05 - Erase DTC Memory.
06 - End Output.
08 - Read Measuring Value Block.
10 - Adaptation.