IKE Modification - Can Bus Additions

The external IKE control module was been incorporated into the Instrument Cluster for the 1998 model year. If IKE replacement is necessary, a complete "Cluster" must be ordered and ZCS encoded at time of replacement.

The CAN bus has also been linked to the Instrument Cluster in the 98 model year. The cluster is an important link in the system, and vital information is now updated faster to the control modules.

The CAN bus connection to the instrument cluster is found at pins 8, 9 and 10 of the blue 26 pin ELO connector on the back.

Fig 1: Identifying IKE In Cluster - CAN Bus Additions

The signals transmitted from M5.2.1 ECM over the CAN bus to the instrument cluster include:

Engine temperature
Engine RPM
Ti signal (MPG Gauge)
"CHECK ENGINE" Light activation

A malfunction with the interface to the instrument cluster could cause the ASC and transmission fail-safe indicators to appear. In addition, the instruments affected by the signals listed above will be inoperative.

The CAN bus users as of the 98 E38 and E39 vehicles are:

ECM (750iL: ECM 1&2)
AGS
ABS/ASC-DSC
EML IIIs (750iL)
Instrument Cluster
Steering Angle Sensor (DSC III vehicles only, 9/97 production)

NOTE: The CAN Bus network of the 528i does not include the instrument cluster until 3/98 production.

Fig 2: Identifying CAN Bus