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.

Display on VAS 5051/5052	Possible cause	Corrective action
01128
Immobilizer reader coil -D2-	Harness connector not connected or induction coil with wire malfunctioning	Check harness connector and induction coil with wire (visual check) Replace induction coil if necessary. Refer to Reader coil, replacing
	Control module for immobilizer (integrated in instrument cluster) malfunctioning.	Erase DTC Memory. Refer to Diagnostic Trouble Code (DTC) Memory, erasing (function 05) Recheck DTC Memory. Refer to Check DTC memory Replace instrument cluster if necessary. Refer to Instrument cluster, removing and installing

Display on VAS 5051/5052		Possible cause	Corrective action
01176
Key
	Signal too small	Induction coil or wire malfunctioning (contact resistance/loose contact).	Check induction coil with wire and harness connector (visual check), replace induction coil if necessary. Refer to Reader coil, replacing
		Electronics in ignition key (transponder) missing or malfunctioning.	Replace ignition key, re-adapt all ignition keys and check for function. Refer to Adaptation of vehicle keys .
	not authorized	Mechanically appropriate ignition key is not adapted.	Re-adapt all ignition keys and check for function. Refer to Adaptation of vehicle keys .

Display on VAS 5051/5052		Possible cause	Corrective action
01177
Engine control unit
	not authorized	Engine Control Module (ECM) not adapted.	Adapt Engine Control Module (ECM): Refer to Adaptation after replacing Engine Control Module (ECM)
01179
Incorrect key programming		Adaptation of ignition key is incorrect	Re-adapt all ignition keys. Refer to Adaptation of vehicle keys
65535
Internal Control Module Memory Check Sum Error		Instrument cluster (with integrated anti-theft immobilizer) malfunctioning	Replace instrument cluster. Refer to Instrument cluster, removing and installing