MODEL   124 with ENGINES 104, 111, 119 (except 104.98) MODEL   129 with ENGINES 104, 112, 113, 119, 120 (except 104.98) MODEL   140 with ENGINES 104, 119, 120 MODEL   163 with ENGINE 112, 113 MODEL   168 with ENGINE 166 MODEL   170 with ENGINES 111, 112 MODEL   202 with ENGINES 104, 111, 112 MODEL   203 with ENGINE 111, 112 MODEL   208 with ENGINES 111, 112, 113 MODEL   210 with ENGINES 104, 112, 113, 119 MODEL   215 with ENGINE 113, 137 MODEL   220 with ENGINE 112, 113, 137 MODEL   230 with ENGINE 113

Example of engine CAN data bus Models 129, 140, 163, 168, 170, 202, 203, 208, 210 TO1 Instrument cluster N3/4 HFM-SFI [HFM] control module N3/5 ECM control module up to 08/01 N3/10 ME-SFI [ME] control module N3/18 ECM control module with throttle valve actuator as of 09/01 N15/3 ETC control module (in part Special Equipment) N15/4 AKS control module (Special Equipment) N19/1 Tempmatic air conditioning (TAC) pushbutton control module (in part Special Equipment) cc Air conditioning (AAC) pushbutton control module (in part Special Equipment) N47-1 ASR control module N47-2 ETS control module N47-5 ESP control module N47-7 ABS control module N54 RCL control module N54/4 Radio frequency/infrared DAS [FBS] control module N65 Cycling module Models 170, 210 Y3/7n2 Front-wheel-drive transmission control (FTC FGS) control module (Special Equipment)
		P54.18-2146-75

P07.61-2159-09

Example of engine CAN data bus, model 220 with engines 112, 113 TO1 Instrument cluster N3/10 ME-SFI [ME] control module N15/3 ETC (electronic transmission control) control module N15/5 Electronic selector lever module control module cc AAC pushbutton control module N47 Traction system control module

N51 AIRmatic with ADS control module N63/1 Control module for DTR (SA) N73 DI control module N80 Steering column module CAN B Engine CAN data bus CAN C Body CAN data bus

Task Data transfer between individual control modules Readying sensor signals for several systems Reducing the number of electric cables Improving electromagnetic compatibility Design The CAN data bus consists of a special twisted two-core data line that connects all CAN users (control modules) in parallel. The two wires of the data line must not be mixed up (low or high level). The engine control module and the RCL control module are always consumers with regard to bus adaptation. A 120 terminating resistor is therefore installed in the engine control module (except for the ME-SFI control module with engine 120, which is equipped with a 240 resistor). A 120 terminating resistor is installed in the DAS control module. If the resistance of the CAN data line is measured (with the ignition switched off!) the various terminating resistors in the consumers are connected in parallel.

Function The data is transmitted digitally over the CAN data bus at various intervals. The individual data blocks are defined in a protocol and it is specified which data are received or transmitted by a control module. Each connected control module is able to transmit or receive data. The total of the data blocks, the short pause between two transmission intervals and further properties of the CAN data bus, are constantly checked. Any faults detected are stored. Vehicles with electronic ignition switch control module (N73) A distinction is made in the vehicle between the fast CAN engine data bus (CAN-C) and the slightly slower CAN body data bus (CAN-B). They are connected (via a gateway) in the electronic ignition switch control module (N73). CAN data bus, see wiring diagrams.