Checking DTC Memory (Function 02)

NOTE: DTC memory must first be read before it can be erased.


Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
- VAG 1551/1552 Scan Tool using VAG 1551/3 adaptor cable


Work Sequence
- Start engine and let idle
- Connect VAG 1551/1552 Scan Tool. [1][2]Reading and Clearing Diagnostic Trouble Codes
- Press 0 and 1 buttons to select Address Word 0l "Engine electronics"

if engine will not start:

- Switch ON ignition
- Switch ON Scan Tool printer using print button.
- Lamp in Print button must light up.


Display will appear as shown


Rapid data transfer HELP
Select function XX


- Operate Scan Tool taking displayed information into account
- Press 0 and 2 buttons to select Function 02: "Check DTC memory"
- Press Q button to enter input

The number of stored DTCs or "No DTC recognized!" will appear on the display.


X DTCs recognized!


NOTE: If one or more DTCs are stored, the stored DTCs will be displayed and printed out one after the other.


After stored DTCs are printed, display will appear as shown:


Rapid data transfer HELP
Select function XX


NOTE: The Scan Tool is partially required for further troubleshooting.


- Leave engine running and Scan Tool connected
- Locate and eliminate DTCs printed out as per DTC table. Testing and Inspection
- Afterwards erase DTC memory. Erasing DTC Memory (Function 05)
- Create readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
- Display the readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

If DTC memory was erased
- Create Readiness code again. Monitors, Trips, Drive Cycles and Readiness Codes

If no DTC is stored:

- Press -> button.

Display will appear as shown


Rapid data transfer HELP
Select function XX


- Press 0 and 6 buttons to select Function 06 "End data transfer"
- Press Q button to enter input