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.

DTC 01128 - IMMOBILIZER

Display on VAS 5051	Possible cause	Corrective action
01128 Induction coil of anti-theft immobilizer -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. See INDUCTION COIL, REPLACING .
01128 Induction coil of anti-theft immobilizer -D2-	Control module for immobilizer (integrated in instrument cluster) malfunctioning.	Erase DTC Memory and check again. See ERASE DTC MEMORY (FUNCTION 05) . Replace instrument cluster if necessary. See INSTRUMENT CLUSTER, REMOVING AND INSTALLING .

DTC 01176 - IMMOBILIZER

Display on VAS 5051	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. See INDUCTION COIL, REPLACING .
Signal too small	-Electronics in ignition key (transponder) missing or malfunctioning.	-Replace ignition key, re-adapt all ignition keys and check for function. See ADAPTATION OF VEHICLE KEYS .
not authorized	-Mechanically appropriate ignition key is not adapted.	-Re-adapt all ignition keys and check for function. See ADAPTATION OF VEHICLE KEYS .

DTC 01177, 01179 & 65535 - IMMOBILIZER

Display on VAS 5051	Possible cause	Corrective action
01177 Engine Control Module (ECM) not authorized	-Engine Control Module (ECM) not adapted	-Adapt Engine Control Module (ECM). See ADAPTATION AFTER REPLACING ENGINE CONTROL MODULE (ECM) .
01179 Key programming incorrect	-Adaptation of ignition key is incorrect	-Re-adapt all ignition keys. See ADAPTATION OF VEHICLE KEYS .
65535 Control module Faulty	-Instrument cluster (with integrated anti-theft immobilizer) malfunctioning	-Replace instrument cluster. See INSTRUMENT CLUSTER, REMOVING AND INSTALLING .