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Home >> BMW >> 2014 >> M6 2D Convertible, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 1105 (Functional Description - F10 - Transmission & Driveline System, Exterior Lighting, Towing, Cruise Control System) >> Exterior Lighting - Functional Description >> Exterior lighting >> General notes

General notes

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Monitoring of light source 

All of the exterior lighting's light sources are monitored by the footwell module (FRM) when switched on. Monitoring starts at "Terminal 15 ON".

Hot monitoring at "lights on" 

Hot monitoring is based on the current measurement. The power consumption readings assist in detection of short and open circuits. Thus, if the power consumptions of the gas discharge bulbs cannot be measured while the bi-xenon headlights are switched on, the footwell module (FRM) identifies a faulty bi-xenon light. The system cancels the activation signal to the affected bi-xenon light and a Check Control message appears in the instrument panel's display panel.

The monitoring function also embraces the light-emitting diodes in the exterior lighting. This function relies on monitoring of power consumption. Failure of light-emitting diodes is also indicated as a Check Control message in the instrument panel (KOMBI).

Emergency operation 

If a defect that could lead to failure of the entire exterior lighting occurs in the software for the footwell module (FRM) the emergency operation is activated:

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