Audi Workshop Service and Repair Manuals

Connecting vehicle diagnostic, testing and information system -VAS 5051 A-

Vehicles up to model year 1999: –  With ignition switched off, connect vehicle diagnostic, testing and information system -VAS 5051 A- with diagnosis lead -VAS 5051 A/1- to diagnostic connection.

Vehicles from model year 2000 onwards: –  With ignition switched off, connect vehicle diagnostic, testing and information system -VAS 5051 A- with diagnosis lead -VAS 5051 A/1- to diagnostic connection. All models:   WARNING Observe the relevant safety precautions → Chapter.   Note Refer to → Operating instructions for vehicle diagnostic, testing and information systemVAS 5051 Aif a fault is indicated on the display. –  Switch on ignition. or –  Start engine.

Indicated on -VAS 5051 A-: –  Touch “Vehicle self-diagnosis” key.

Indicated on -VAS 5051 A-:   Note Touching function “00 - Interrogate fault memory - complete system” in list -1- implements the automatic test sequence, i.e. fault memory interrogation takes place for all vehicle systems with self-diagnosis capability. –  From menu -1- select vehicle system “03 - Brake electronics”. –  Wait until next readout appears.

Indicated on -VAS 5051 A-: 2 -  Control unit identification of ABS with EDL control unit -J104-.

Control unit identification : ABS with EDL control unit -J104- (example)
03 - Brake electronics	Vehicle system
1J0907379..	Part No.; Allocation → Parts catalogue
ABS EDL	System designation: ABS (ABS only), ABS EDL (ABS with EDL), ESP
20 IE	System generation
CAN	Data bus (CAN) - not on 1997 model year vehicles
Coding 18945	Control unit coding (checking: vehicles without ESP → Chapter, vehicles with ESP → Chapter).
Dealership number 12345	Dealership identifier of -VAS 5051 A- with which coding was last performed

If the display “Vehicle system not available” appears in display zone -1-: –  Check: t  Voltage supply to diagnosis connector → Current flow diagrams, Electrical fault finding and Fitting locations. t  Wiring connection between diagnosis connector and ABS with EDL control unit -J104- → Current flow diagrams, Electrical fault finding and Fitting locations.