Altima 2.5 SL L4-2.5L (QR25DE) (2002)
Wiper Switch: Description and Operation
BCM Wiper Switch Reading Function
BCM reads combination switch (wiper switch) status, and controls front wipers based on the results. BCM is a combination of 5 output terminals
(OUTPUT 1 - 5) and 5 input terminals (INPUT 1 - 5). It reads 20 types of switch data and 5 types of diagnosis data.
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.
TABLE OF BCM - COMBINATION SWITCH OPERATIONS
BCM reads operation status of combination switch using combinations shown in table.
SAMPLE OPERATION: (WIPER SWITCH TURNED TO LO POSITION)