Reading and Clearing Diagnostic Trouble Codes

Engine Control Module DTC Memory, Checking and Erasing

Special tools, testers and auxiliary items required

• Vehicle diagnostic tester

- Connect the vehicle diagnosis, testing and information system to the vehicle.

- Start the engine and run at idle speed.

Only if engine does not start:

- Switch on the ignition.

Selecting operating mode

- Press button on display for "Vehicle On Board Diagnostic (OBD)".

Selecting vehicle system

- Press button "01 - Engine electronics" on display.

The control module identification with coding - 2 - as well as Vehicle Identification Number (VIN) in the center area and identification of anti-theft immobilizer appear on the display.





• The (VAS 5051B) can create a printout. Press the "print" button if required.

Selecting diagnosis function

- Press button "02 - Check DTC memory" on display.

- If no malfunction is stored in the Engine Control Module (ECM), "0 DTC(s) detected" is displayed.

- If malfunctions are stored in the ECM, these are shown one below another on the display.

- Press the <- key.

- Press button "05 - Erase DTC memory" on display.

- Press function "06 - End output".

• If the Diagnostic Trouble Code (DTC) memory was erased, the readiness code must be generated again. Refer to vehicle diagnosis, testing and information system "Guided Fault Finding".