Volkswagen Workshop Service and Repair Manuals

All the functions that were previously possible with the V.A.G 1551/1552 can be performed with the new tester VAS 5051 in 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 No. 1, 3, 15, 24, 30, 31, 34, 36 and 40 must be OK.
• ● Earth connection between engine (on gearbox bell housing) and body (below battery) OK.
• ● Earth connection in plenum chamber OK.
• ● The battery voltage must be at least 11.5 V.

• ● If the vehicle is equipped with an air conditioning system, this must be switched off.
• ● All electrical consumers, e.g. lights and rear window heating must be switched off.

Work sequence

• ‒ → Pull cover -1- off in direction of arrow.
• ‒ Connect tester VAS 5051 with diagnosis cable VAS 5051/1 or VAS 5051/3 as follows:
• ‒ Fit diagnosis cable connector onto diagnosis connector.
• ‒ Depending upon desired function:
  Switch ignition on
       or
  Start engine , Table "Selectable functions".

Note:

• ◆ The display fields will be displayed from top to bottom in functions 04 - Basic settings or 08 - Read data block.
• ◆ 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:

Selecting operating mode:

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

→ Indicated on display:

Selecting vehicle system:

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

→ The control unit identification and coding -arrow- is shown on display e.g.:

Note:

Replace control unit if the control version displayed does not correspond to the vehicle

=> Page 24-135 .

→ Indicated on display:

Selecting diagnosis function:

At this point all diagnosis functions are available.

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