VAS 5051 Scan Tool

VAS 5051, Connecting And Selecting Motronic Engine Control Module (ECM) -J220-

All functions which could previously be performed with VAG 1551/1552 can also be performed with the tester VAS 5051 in the operating mode vehicle On Board Diagnostic (OBD):
See Operating instructions for VAS 5051 scan tool.

Special tools, test equipment and auxiliary items







- VAS 5051 scan tool

Test conditions







- All fuses must be OK
- The battery voltage must be at least 11.5 V
- Ground connection between engine and body must be OK
- All electrical accessories, e.g. lights and rear window defroster must be switched off
- If the vehicle is equipped with air conditioning, it must be turned off.
- Selector lever must be in position "P" or "N" on vehicles with an automatic transmission

Work sequence
- Connect tester VAS 5051 using diagnostic cable VAS 5051/1 or VAS 5051/3 as follows:







- Push connector of diagnostic cable onto diagnostic connection.
- Depending upon desired function: switch ignition on or start engine, Table "Selectable functions."


NOTE:
- In the functions 04 - Basic setting/08 - Read Measuring Value Block, the display zones will be listed from top to bottom.
- If the display does not indicate as described in the work sequence:
See Operating instructions for VAS 5051 scan tool.







Indicated on display


Select operating mode:
- Press button on the display for "Vehicle On Board Diagnostic (OBD)" -arrow-.







Indicated on display


Select vehicle system:
- Press buttons "01 - Engine electronics" on display -arrow-.







On the display the control module identification and coding are displayed,
e.g.

If the coding differs from the vehicle version, then:
- Replace Motronic Engine Control Module (ECM) -J220-.







Indicated on display


Select diagnostic function:
At this point all diagnostic functions are available.
- Press desired function on the display.
- For further measures see repair procedures.