MODEL   170 as of 1.3.97

System interlinkage A1 Instrument cluster CAN Controller area network L11 Transponder coil N54/3 Radio frequency DAS control module (model 170) N54/4 Radio frequency/infrared DAS control module (models 129, 140) S2/1 Ignition/starter switch X11/4 Data link connector 1 Radio frequency/infrared remote control key with transponder 2 Engine control module 3 Engine
		P80.30-0384-06

When the ignition is switched "ON" the transponder is supplied with power. The data block content is transmitted inductively by the transponder via the transponder coil (L11) to the radio frequency DAS control module (N54/3) (model 170) or the radio frequency/infrared DAS control module (N54/4) (models 129/140) where it is evaluated. If valid the engine control is released analog to drive authorization system 2a via the CAN data bus from the radio frequency DAS control module (N54/3) (model 170) or the radio frequency/infrared DAS control module (N54/4) (models 129/140) to the engine control module.

If the transponder is invalid or it is not possible to build up energy for the transponder, the engine control is not released. This is displayed with the message "START ERROR" in the instrument cluster. The drive authorization system is independent of the status of the central locking system and the batteries in the remote control key.

	Remote control key, purpose/design /function		GF80.57-P-4101B
	DAS radio frequency control module, location/purpose		GF80.57-P-4105A