General module of ZKE V

The general module of the central body electronics ZKE V controls the following functions:

• Windscreen 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 units
    
  • 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, boot 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 units. 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)
  
• Windscreen wiper interval time from rain sensor
  
• Side lights (terminal 58) switched on
  
• Crash detection by airbag control unit
  
• 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. windscreen 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.