Volkswagen Workshop Service and Repair Manuals

All functions which could previously be performed with V.A.G 1551/1552 can also be performed with the new tester VAS 5051 in the operating mode vehicle self-diagnosis:

=> Operating instructions for vehicle diagnosis, testing and information system VAS 5051.

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ → VAS 5051 vehicle diagnosis, testing and information system

Test conditions

• ● → The fuses 5, 10, 13, 28, 29, 32, 34 and 43 must be OK.
• ● The battery voltage must be at least 11.5 V.
• ● Earth connection between engine and body must be OK.

Work sequence

• ‒ Connect the tester VAS 5051 using diagnostic cable VAS 5051/1 or VAS 5051/3 as follows:

• ‒ → Pull cover -1- off in direction of arrow.
• ‒ Connect diagnosis cable connector on to diagnosis connection.
• ‒ Depending upon desired function:
  Switch ignition on
       or
  Start engine , Table "Selectable functions".

Notes:

• ◆ In the functions 04 - Basic setting/08 - Read data block, the display zones will be listed from top to bottom.
• ◆ If the display does not indicate as described in the work sequence:

=> Operating instructions for vehicle diagnosis, testing and information system VAS 5051.

→ Indicated on display:

Select operating mode:

• ‒ Press the button on the display for "Vehicle self-diagnosis" -arrow-.

→ Indicated on display:

Select vehicle system:

• ‒ Press keys "01 - Engine electronics" on the display -arrow-.

→ On the display the control unit identification and coding are displayed, e.g.:

If the coding differs from the vehicle version, then:

• ‒ Checking control unit coding => Page 24-116 ,
  coding engine control unit

→ Indicated on display:

Select diagnostic function:

At this point all diagnostic functions are available.

• ‒ Press the desired function on the display.
• ‒ Further measures see repair procedures.