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Home >> BMW >> 2000 >> M5 >> Repair and Diagnosis >> Electrical >> Body Electrical >> Central Body Electronics (ZKE III) - Overview - E38, E39 & E53 >> Central Body Electronics (ZKE III) >> Power Windows/Sunroof >> Power Window Motors >> Window Motor Limit Stop Function

Window Motor Limit Stop Function

If the windows are run up and down continuously a limit stop function is activated to prevent the window motors from overheating. The GM monitors the number of times the window motors are activated. Each cycle is counted and stored in memory.

If the repetitive window activation (up/down) exceeds one minute, the GM deactivates the internal relays and disregards any further input requests. The GM provides motor activation after a short duration but not for the full one minute monitoring cycle. Over time, the GM slowly reverses the stored count of activation until the stored number equals 0.