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Home >> Toyota >> 2009 >> Prius Base >> Repair and Diagnosis >> Electrical >> Body Electrical >> OEM System Circuits >> Front Wiper and Washer >> System Outline

System Outline

When the power SW is pushed to the IG ON position, current flows to TERMINAL (B) 2 of the wiper and washer SW, and to TERMINAL 2 of the front wiper motor through the WIP fuse.

  1. Low Speed Position 

    When the wiper and washer SW is turned to the LO position, current flows from TERMINAL (B) 2 of the wiper and washer SW and out TERMINAL (B) 3 to TERMINAL 5 of the front wiper motor then out TERMINAL 4 to GROUND, which causes the front wiper motor to run at low speed.

  2. High Speed Position 

    When the wiper and washer SW is turned to the HI position, current flows from TERMINAL (B) 2 of the wiper and washer SW then out TERMINAL (B) 4 to TERMINAL 3 of the front wiper motor and out TERMINAL 4 to GROUND, which causes the front wiper motor to run at high speed.

  3. INT Position 

    When the wiper and washer SW is turned to the INT position, the wiper relay operates and current flows from TERMINAL (B) 2 of the wiper and washer SW then out TERMINAL (A) 2 to GROUND. This activates the intermittent circuit and current flows from TERMINAL (B) 2 of the wiper and washer SW then out TERMINAL (B) 3 to TERMINAL 5 of the front wiper motor and out TERMINAL 4 to GROUND and then the wiper operates. The intermittent operation is controlled by the condenser charge and discharge function in the relay.

  4. Washer Interlocking Operation 

    When the wiper and washer SW is pulled to the washer position (Washer SW ON position), current flows from the WSH fuse to TERMINAL 1 of the front washer motor and out TERMINAL 2 to TERMINAL (A) 3 of the wiper and washer SW and out TERMINAL (A) 2 to GROUND and runs the washer motor and the window washer to spray. Simultaneously, current flows from the WIP fuse to TERMINAL (B) 2 of the wiper and washer SW then out TERMINAL (B) 3 to TERMINAL 5 of the front wiper motor and out TERMINAL 4 to GROUND, which activates the wiper.