Intelligent Switching Unit Description and Operation: Wiper

The wiper can operate when IGN 1 power is supplied.

When the INT signal of the wiper switch is supplied to the intelligent switching unit (ISU), the internal relay of the ISU is energized for 0.5 seconds, and the wiper motor will start to move. After 0.5 seconds, the motor will operate just one cycle and will stop at the parking position by the cam plate switch circuit of the wiper motor.

Intermittent time can be adjusted from 1.5 seconds through 12 seconds by the intermittent time adjusting switch.

If the washer switch input time is more than 0.3 second, the internal wiper relay of the ISU will energize. The wiper motor will continue to work while the washer switch is in ON. If the washer switch is turned to OFF again, then the motor will cycle 2 more times.