SEAT Workshop Service and Repair Manuals

-VAS 5051- Vehicle Diagnosis, Testing and Information System connecting and selecting engine electronics control uni All functions of -V.A.G 1551/1552- can also be carried out with the new tester -VAS 5051- in mode “vehicle self-diagnosis” → Operating instructions for Vehicle Diagnosis, Testing and Information System VAS 5051. Special tools and workshop equipment required

t  Vehicle Diagnosis, Testing and Information System -VAS 5051- Check conditions l  Fuses no. 15, 18, 20 and 21, OK. l  Battery voltage at least 11.5 V. l  Earth connection between engine (on gearbox bell housing) and body (next to battery) OK. l  Earth connection in plenum chamber OK. Work sequence –  Remove driver side shelf.

–  Connect the tester -VAS 5051- using diagnostic cable -VAS 5051/1- or -VAS 5051/3- as follows: –  Plug the diagnostic cable into the diagnostic connection. –  According to the function desired, switch ignition on or start engine → “Selectable Functions”.   Note! t  The display fields will be displayed from top to bottom in functions “04 Basic settings” and “08 Read measured value block”. t  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 key “01 - Engine electronics” on the display -arrow-.

On the display the control unit identification and coding -arrow- are displayed, e.g.:   Note! Replace control unit if the control unit version displayed does not correspond to the vehicle → Chapter.

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.