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Home >> BMW >> 2004 >> 745Li >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting Systems - Overview >> Lighting Systems >> Principle of Operation >> Lamp Control And Monitoring >> Bulb Monitoring

Bulb Monitoring

All bulbs with the exception of the LED brake/tail lights and the xenon headlights are cold monitored. The LEDs and bi-xenon lights are warm monitored along with the rest of the bulbs.

The LM signals the instrument cluster if a bulb has failed so that it can display a Check Control warning to the driver.