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Home >> Nissan-Datsun >> 2004 >> Altima Base, Automatic >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System & Washer System & Horn System >> Front Wiper And Washer System >> Combination Switch Reading Function >> Operation Description
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Operation Description

BCM continuously outputs power voltage from input terminals (INPUT 1 - 5). At this time, output terminals (OUTPUT 1 - 5) operate transistors in sequence and carry current. If any switch (or switches) become ON at this time, the input terminal corresponding to that switch detects current flowing, and BCM determines that the switch is ON.