Scan Tool Connecting and Initial Checks

VAS 5051 Vehicle Diagnostic, Testing And Information System Or VAG 1551 Scan Tool (ST), Connecting And Selecting Functions

Test requirements
- Fuses for engine electrical OK
- Fuel pump relay OK. Testing and Inspection
- Battery voltage at least 12.7 V
- Ground (GND) connections at engine and transmission OK

Procedure
- Switch ignition off.







- Connect VAS 5051 with diagnostic wire VAS 5051/1.

WARNING:
- For road tests, always secure VAS 5051 tester to rear seat and have operated from there by a second technician.
- Note safety precautions. Service Precautions

NOTE: A malfunction message appears on the display, See Operating instructions of vehicle diagnostic, testing and information system VAS 5051.

Display on VAS 5051:







- Press "vehicle self-diagnosis" button.

Display on VAS 5051:







NOTE: The automatic test sequence is carried out by pressing "00 - Check Diagnostic Trouble Code (DTC) memory - Total system" in selection -1-, i.e. the Diagnostic Trouble Code (DTC) memories of all vehicle systems with On Board Diagnostic (OBD) capability are checked.

Display on VAS 5051:







Depending on which function is required "Diagnostic functions" table
- Switch ignition on.
or
- Start engine.
- Select vehicle system "01 - Engine electronics" in selection -1-.
- Wait until next display appears.

Display on VAS 5051:







1 - Control module identification of the Engine Control Module (ECM)
2 - Control module identification of the Immobilizer









- Press -> button.

Display on VAS 5051:







1 - Selection of diagnostic functions: