Anti-Theft Immobilizer, On-Board Diagnostic (OBD)

Diagnostic Trouble Code (DTC) Table

NOTE:
- Next, all possible malfunctions that can be recognized by the immobilizer and printed out by the VAS 5051 tester are listed according to their 5-digit DTC.
- DTCs of the instrument cluster can also be indicated, since the immobilizer is integrated in the instrument cluster.
- DTC memory stores all static and sporadic malfunctions:If a malfunction occurs and persists for at least 2 seconds, it is identified as a static malfunction. If a malfunction does not occur again, it is registered as sporadic. In addition, "sporadic" is indicated on display.
- When the ignition is switched on, all existing malfunctions are automatically re-classified as sporadic malfunctions and will only register as static malfunctions if they still occur after testing.
- Sporadic malfunctions which no longer occur during 50 driving cycles (ignition on at least 5 minutes, vehicle speed greater than 30 km/h) are erased automatically.
- Do not immediately replace components that the VAS 5051 suggests are malfunctioning, instead: Check wire connections and harness connectors to these components according to wiring diagram. Also check Ground (GND) connections according to wiring diagram. This is particularly valid when malfunctions are displayed as "sporadic".
- When repairing an open circuit for a CAN-bus malfunction, always be sure to prevent electromagnetic interference by twisting both data wires of the respective BUS system together.
- After repair, DTC memory must be checked again and erased.

CAUTION: In addition, only DTC memory of the Engine Control Module (ECM) must be checked and DTC memory content Engine Control Module deactivated" must be erased. Check and repair other stored malfunctions.