Component Tests and General Diagnostics

Engine Control Module, DTC Memory Checking and Erasing

Special tools, testers and auxiliary items required

• Vehicle diagnostic, testing and information system (VAS 5051 A) with diagnostic cable

Procedure

Connect vehicle diagnosis, testing and information system (VAS 5051 A) as follows:

- Open the cover - 1 - (if equipped) and connect the connector of the diagnostic cable to the data link connector.





- Start engine and run at idle speed.

Only when engine does not start:

- Switch on ignition.

Selecting operating mode:

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

Selecting vehicle system:

- Press "01 - Engine electronics" on display to check Engine Control Module (ECM) 1 (J623) for cylinder bank 1, or "11 - Engine electronics 2" on display to check ECM 2 (J624) for cylinder bank 2.

The control module identification with code - 2 - of ECM, as well as chassis number and immobilizer identification number will be indicated on the display.





• A print out is available. Press the Print button if required.

Selecting diagnosis function:

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

- If no fault is stored in ECM "0 fault(s) detected" is displayed.

- If faults are stored in the ECM, these are shown one below the other on the display.

- Press the <- key.

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

- Press function "06 - End output".