Control Module

Check Control












The new Check Control System in the E38 utilizes a self-contained Check Control Module (CCM).

The CCM is located in the electrical carrier in front of the glove box.

This module collects and evaluates all check control data, including messages from the Lamp Control Module (LM).

When the driver needs to be informed of a problem, the CCM signals the IKE over the I-BUS. The IKE will then post the message in the instrument cluster matrix display

The text and operation of the E38 check control has been changed to improve message interpretation and reliability, for example:

- GONG. Pre E38: Gong with every new display.
E38: Only activated for first display in group.

Advantage: Reduces driver's irritation.

- DISPLAY: Pre E38: "Owner's Handbook" used repeatedly
E38: "Owner's Handbook" phrase deleted. Actual text for situation with recommended action.

Advantage: Driver can asses situation without reading the Owner's Manual.


All the warning messages fall into one of four priority groups.







Priority Group P1 - Faults that directly affect the safety or operation of the car and the drive should be addressed immediately. The text is displayed with a flashing arrow on the right and left sides.







Priority Group P2 - Faults that do not affect vehicle's safety or operation directly and the driver need not respond to immediately. These messages are displayed only once when the fault occurs and have to be called up again with the CC button.







Priority Group P3 - These faults are shown when the key is turned on before a trip. The faults in P3 are mainly fluid levels which are not assigned to P2. The lights on reminder is a Priority 3 item. With the key in position 0 with the light switch On initiates this reminder.







Special warnings - These are top priority messages and won't be overridden when displayed. Seat belt/ignition key in lock with door open are some of these messages.

When the key is switched off, all registered check control faults are displayed.
The language of the check control messages is set with the central coding key and can't be changed.