Data exchange between control modules, checking: Procedure: Notes

Display on VAS 5051:

Fig 1: Display On VAS 5051 - Data Exchange Between Control Modules

Courtesy of AUDI OF AMERICA, INC.

In selection -1-, press "00 - Check DTC Memory - complete system".

NOTE: The address word 00 initiates the automatic test sequence, i.e. it results in a DTC check on all OBD capable systems in the vehicle via rapid data transfer.

Wait until the next indication appears on display.

When a control module responds with its identification, the display indicates the number of stored errors or indicates "no malfunctions recognized".

If necessary, print out Screen content or On Board Diagnostic (OBD) protocol:

See operating instructions for the VAS 5051 tester.

If a malfunction involving "... databus" or" ... no communication" is indicated:

Check whether the correct control module for this vehicle is installed (part number and coding).

If the correct control modules are installed, check the CAN bus system.