Anti-Theft Immobilizer, with Access/Start Control Module
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Immobilizer control is integrated in Access/Start Control Module J518. Component location: Integrated in steering column, removing and installing → 48 - STEERING .
The following components are also part of the immobilizer:
- Vehicle key with integrated transponder.
- Induction coil in Access/Start Authorization Switch E415 (electronic ignition lock).
- Engine Control Module (ECM).
- Transmission Control Module (TCM).
- If the control module is replaced, use Vehicle Diagnosis, Testing info. System VAS 5051B (or other VAS 505X class tester) in operating mode "Guided Functions" and select the "Replace" function for the respective control module.