TSB : Body Control Module: Description and Operation

Details

General Module Of ZKE V The general module of the central body electronics ZKE V controls the following functions: - Windshield wipe and wash - Headlight washer - Power windows - Central locking - Antitheft Alarm System - Interior lighting - Load deactivation - Remote control - Additional as of diagnosis index 42 or 52 (deployment as of 03/2003): Mirror memory, mirror heating and folding mirror Two versions of the general module are available: - High version (full equipment) - Low version (without rear power windows) Versions of the general module The following development stages exist for the general module: - General module with diagnosis index 40 (High version) or 50 (Low version) Deployment up to 09/2002 - General module with diagnosis index 41 (High version) or 51 (Low version) Deployment as of 09/2002 Redesign version with the following changes: - Revised hardware - Output for interior lights clocked to balance our electrical system fluctuations - Additional output for consumer shutdown VA2 for control modules - Rain sensor can switch to wiper stage 2 - Adaptations to E85 Z4 and E83 X3 - General module with diagnosis index 42 (High version) or 52 (Low version) Deployment as of 03/2003 - Same as redesign version but additionally with LIN bus for mirror function and for a central switch block - Control of the mirror functions: Mirror memory, mirror heating and folding mirror - Saving the mirror position in mirror memory Power supply Electronics The voltage for the general module electronics is supplied via the 54-pin plug connector pin 10 (terminal 31) and pin 47 (terminal 30). Load circuits The load circuits of the consumer loads connected to the module are powered via the 15-pin plug connector. - Pin 1: Terminal 30 for interior lights, wash pump, trunk lid release and lights, load cutout. - Pin 8: Terminal 30 for front power window drives. - Pin 9: Terminal 30 for central locking drives. - Pin 10: Terminal 30 for rear power window drives or electrically-operated vent windows. - Pin 15: Terminal 31 for central locking drives and power window drives. K-bus General The general module is connected via the K-bus to other control modules. The general module receives and transmits data via the K-bus. Among other things, the general module receives the following data via the K-bus: - Ignition lock position (status of terminals R and 15) - Windshield wiper interval time from rain sensor - Side lights (terminal 58) switched on - Crash detection by airbag control module - EWS status (key inserted, key valid, etc..). Diagnosis In addition, diagnosis with the general module also takes place via the K-bus. The diagnostic telegrams are routed from the diagnostic tester via the RxD link to the instrument cluster. From here the data are transferred via the K-bus to the general module . Diagnostic data sent by the general module are routed via the K-bus, instrument cluster and RxD link back to the diagnostic tester. LIN bus On general modules as of 03/2003 (diagnosis index as of 42 or 52), an additional LIN bus is connected to the module (LIN = local interconnect network). The door mirror and a switch block for mirror and power window adjustment can be connected to the LIN bus. Terminal R General The status of terminal R is registered both via the K-bus as well as via a separate line. This enables operation of "terminal R-dependent" functions (e.g. windshield wipers) even when the K-bus is faulty Encoding General Many functions of the general module are adapted by means of coding data to components dependent on options as well as different country-specific requirements. After replacement, it is therefore necessary to encode the general module by means of the encoding program.