Instrumentation bus (I-bus)

The instrumentation bus (I-bus) is one of three information links (data link/serial) via a data link to other control units. The instrument bus is monitored by the instrument cluster electronics (IKE ). The IKE also sets up the interconnection of the bus systems:

• I-bus (instrumentation bus)
  
• K-bus (body bus)
  
• Diagnosis bus (link to diagnostic socket),
  
• CAN bus (instrument cluster-integrated version phased-in as from 5/97)
  

(gateway function).