Malfunction Lamp / Indicator: Description and Operation

Airbag Warning Lights (AWL) and Check Control

The E65/E66 has a variety of systems for the display of faults in the ISIS. These include warning lamps, Check Control graphic symbols and Check Control text messages displayed in the KCIMBI and Control Display.

The warning lamps include the airbag warning lamp AWL and the "fasten seatbelt" lamp. The warning lamps illuminate in the LED warning light field of the KOMBI.




The airbag warning lamp is activated in the pre-drive check and is switched on in the event of the following system faults:

- Fault in the self-diagnosis of the SIM.
- Communication fault in the byteflight.
- Fault during the pre-drive check.
- Vehicle identification number incorrect or missing.

The faults in the control unit or the satellites are transmitted to the SIM as a status telegram. These messages are transferred from the SIM via the byteflight to the Central Gateway Module (ZGM) and via the K-CAN-S to the KOMBI.

Activation of the airbag warning lamp AWL, the graphic symbols and the Check Control messages are controlled by the instrument cluster on the basis of the data received from the SIM.

If the functions in the overall system that are relevant to safety are operating correctly, the SIM transmits a message to the instrument cluster at regular intervals, approx. every 200 ms. If this signal fails for longer than 2 seconds, the KOMBI indicates this as a fault in the system by causing the airbag warning lamp to light up.

Check Control Messages

The graphic symbols appear in the information display field of the KOMBI. The following symbols are possible:

The red airbag symbol is activated when there is a fault in the driver or front passenger airbag.

The yellow airbag symbol is activated in the event of faults in the side airbags, the head airbags as well as the seatbelt tensioner or belt tension limiter.

The yellow service symbol is activated in the event of faults in the fuel pump circuit.

The following Check Control messages are for start of production E65/E66: