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Home >> BMW >> 2001 >> M Coupe >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> ZKE 4 - Overview - E36 >> ZKE 4 >> Windshield Wiping/Washing >> System Components - with Principle of Operation >> Wiper Stalk Switch Input

Wiper Stalk Switch Input

The wiping stage inputs are through a coded combination switch that supplies a ground signal to the WWM. The wiping stages include:

Single (S):  Momentarily holding the wiper switch down in the single position provides a momentary ground signal to activate a single sweep in slow speed.

Slow (I) and Fast (II):  The stage I and stage II wiping speeds are road speed dependent. Stage I switches to intermittent when the vehicle is stopped and stage II switches to stage I when stopped.

Windshield Washing:  The wash request provides a switched ground input to the WWM by pulling the stalk rearward. The WWM activates the windshield washer pump directly. When the washing function is activated, the pump runs as long as the switch is held. The wipers switch on and will continue to for 3 wiping cycles after the switch is released.

Intermittent:  The interval time of the wipers is vehicle speed dependent. As the vehicle speed increases, wiping interval times decrease. This timed interval is set in the control module and is not programmable. The programmed intermittent cycles are as follows:

INTERVAL TIME OF WIPERS (PROGRAMMED INTERMITTENT CYCLES)

0-10 mph 10-25 mph 25-50 mph 50-69 mph 69-93 mph >93 mph
14 sec's 8 sec's 7 sec's 6 sec's 5 sec's 4 sec's