General

The driver's information system on the E38 consists of:
- Instrument Cluster Module (IKE)
- Check Control (CCM).
- Lamp Control/Check (LM).
- Multi-information display (MID).
- Multi function steering wheel control module (MFL CM)
- Radio
- Amplifier (DSP)
- Cellular Telephone
- Digital Sound Processor (DSP) (Optional)
- Instrument Cluster display (AE)

The IKE is the connection or gateway between three (3) data communication systems.

- Diagnosis Bus (RXD/TXD)
- Information Bus (I BUS)
- Body Bus (K Bus)







The IKE control module is mounted on the back of the instrument cluster and is connected to the cluster with a 46 pin ribbon connector.

The two additional connectors contain the the D, I and K Busses and the input and output leads to IKE.

The IKE contains all of the processing electronics for the Instrument Cluster and On-Board Computer.

The Instrument Cluster is merely a display unit and performs no processing. On Board Computer data can be displayed in the MID or the matrix display in the cluster.

Signals that are intended for a component that is on the I-BUS must be passed on by the IKE. Also, diagnostic data must be passed through the IKE to the "I" and "K" busses as communication between DIS and control modules takes place.

The IKE incorporates an EEPROM for storing the central coding key.