Infrared drive authorization system control module, purpose - GF80.30-P-4003-01A

FBS 2a 

The DAS infrared control module performs the following functions:

1. a) Infrared remote central locking 
   • Reading and evaluating transponder signal

   After recognition of valid IR signal 

   • Actuation of
     • Central locking (CL)
     • Anti-theft alarm (ATA)
     • Convenience feature (CF)
     • Confirmation on interior rearview mirror, models 129/140/202/210 or top of roof frame, model 170
     • Confirmation via turn signals (models 170/202/210 via additional relay)
     • Reading in and evaluating the mechanical lock switches (SN1-unlock, SN2-lock), (only ).
2. b) Drive authorization system stage 2a (DAS2a) 
   • Actuation of transponder coil on ignition/starter switch
   • Release of engine control module via CAN with valid transponder
   • Receipt and evaluation of infrared remote control signal code

   The DAS infrared control module (N54/1) evaluates the transponder data transferred and, if valid, releases the engine control via the CAN data bus.