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Connecting VAG 5051 Scan Tool




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

All functions which could previously be performed with VAG 1551/1552 can also be performed with the vehicle diagnostic, testing and information system VAS 5051 in the operating mode vehicle On Board Diagnosis (OBD):

See 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







- Diagnostic cable VAS 5051/1 or VAS 5051/3


Test prerequisites







- The fuses must be OK.







- The main fuses must be OK.
- The battery voltage must be at least 11.5 V.
- Ground (GND) connection between engine and body must be OK.
- All electrical devices, e.g. lights and rear window heating must be turned 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 VAS 5051 using VAS 5051/1 or VAS 5051/3 diagnostic adapter cable as follows:







- Connect the connector of the diagnostic adapter cable onto the DLC.
- Depending upon desired function: Switch ignition on or Start engine, Table "Selectable functions". Selectable Functions When Using VAG1551/1552 or VAS5051

NOTE:
- In the functions 04 - Basic setting or 08 - Read measured value (data) 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.

Indicated on display:







Select operating mode:
- Press button on screen for "Vehicle self-diagnosis".

Indicated on display:







Select vehicle system:
- Press button "01 - Engine electronics" on screen.


The control module identification and coding are shown on the display,
e.g.:







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

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.
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